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Diffstat (limited to 'users/grfn/achilles')
40 files changed, 0 insertions, 5829 deletions
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-[dependencies] -anyhow = "1.0.38" -bimap = "0.6.0" -clap = "3.0.0-beta.2" -derive_more = "0.99.11" -inkwell = { git = "https://github.com/TheDan64/inkwell", branch = "master", features = ["llvm11-0"] } -itertools = "0.10.0" -lazy_static = "1.4.0" -llvm-sys = "110.0.1" -nom = "6.1.2" -nom-trace = { git = "https://github.com/glittershark/nom-trace", branch = "nom-6" } -pratt = "0.3.0" -proptest = "1.0.0" -test-strategy = "0.1.1" -thiserror = "1.0.24" -void = "1.0.2" - -[dev-dependencies] -crate-root = "0.1.3" -pretty_assertions = "0.7.1" diff --git a/users/grfn/achilles/ach/.gitignore b/users/grfn/achilles/ach/.gitignore deleted file mode 100644 index ac5296ebbd..0000000000 --- a/users/grfn/achilles/ach/.gitignore +++ /dev/null @@ -1,7 +0,0 @@ -*.ll -*.o - -functions -simple -externs -units diff --git a/users/grfn/achilles/ach/Makefile b/users/grfn/achilles/ach/Makefile deleted file mode 100644 index 3a8cd2865e..0000000000 --- a/users/grfn/achilles/ach/Makefile +++ /dev/null @@ -1,15 +0,0 @@ -default: simple - -%.ll: %.ach - cargo run -- compile $< -o $@ -f llvm - -%.o: %.ll - llc $< -o $@ -filetype=obj - -%: %.o - clang $< -o $@ - -.PHONY: clean - -clean: - @rm -f *.ll *.o simple functions diff --git a/users/grfn/achilles/ach/externs.ach b/users/grfn/achilles/ach/externs.ach deleted file mode 100644 index faf8ce90e3..0000000000 --- a/users/grfn/achilles/ach/externs.ach +++ /dev/null @@ -1,5 +0,0 @@ -extern puts : fn cstring -> int - -fn main = - let _ = puts "foobar" - in 0 diff --git a/users/grfn/achilles/ach/functions.ach b/users/grfn/achilles/ach/functions.ach deleted file mode 100644 index dc6e7a1f3e..0000000000 --- a/users/grfn/achilles/ach/functions.ach +++ /dev/null @@ -1,8 +0,0 @@ -ty id : fn a -> a -fn id x = x - -ty plus : fn int -> int -fn plus (x: int) (y: int) = x + y - -ty main : fn -> int -fn main = plus (id 2) 7 diff --git a/users/grfn/achilles/ach/simple.ach b/users/grfn/achilles/ach/simple.ach deleted file mode 100644 index 20f1677235..0000000000 --- a/users/grfn/achilles/ach/simple.ach +++ /dev/null @@ -1 +0,0 @@ -fn main = let x = 2; y = 3 in x + y diff --git a/users/grfn/achilles/ach/units.ach b/users/grfn/achilles/ach/units.ach deleted file mode 100644 index 70635d978c..0000000000 --- a/users/grfn/achilles/ach/units.ach +++ /dev/null @@ -1,7 +0,0 @@ -extern puts : fn cstring -> int - -ty print : fn cstring -> () -fn print x = let _ = puts x in () - -ty main : fn -> int -fn main = let _ = print "hi" in 0 diff --git a/users/grfn/achilles/default.nix b/users/grfn/achilles/default.nix deleted file mode 100644 index 5245049d4a..0000000000 --- a/users/grfn/achilles/default.nix +++ /dev/null @@ -1,24 +0,0 @@ -{ depot, pkgs, ... }: - -let - llvmPackages = pkgs.llvmPackages_11; -in - -depot.third_party.naersk.buildPackage { - src = ./.; - - buildInputs = [ - llvmPackages.clang - llvmPackages.llvm - llvmPackages.bintools - llvmPackages.libclang.lib - ] ++ (with pkgs; [ - zlib - ncurses - libxml2 - libffi - pkgconfig - ]); - - doCheck = true; -} diff --git a/users/grfn/achilles/shell.nix b/users/grfn/achilles/shell.nix deleted file mode 100644 index f32dce3ba3..0000000000 --- a/users/grfn/achilles/shell.nix +++ /dev/null @@ -1,18 +0,0 @@ -with (import ../../.. {}).third_party.nixpkgs; - -mkShell { - buildInputs = [ - clang_11 - llvm_11.lib - llvmPackages_11.bintools - llvmPackages_11.clang - llvmPackages_11.libclang.lib - zlib - ncurses - libxml2 - libffi - pkg-config - ]; - - LLVM_SYS_110_PREFIX = llvmPackages_11.bintools; -} diff --git a/users/grfn/achilles/src/ast/hir.rs b/users/grfn/achilles/src/ast/hir.rs deleted file mode 100644 index cdfaef567d..0000000000 --- a/users/grfn/achilles/src/ast/hir.rs +++ /dev/null @@ -1,364 +0,0 @@ -use std::collections::HashMap; - -use itertools::Itertools; - -use super::{BinaryOperator, Ident, Literal, UnaryOperator}; - -#[derive(Debug, PartialEq, Eq, Clone)] -pub enum Pattern<'a, T> { - Id(Ident<'a>, T), - Tuple(Vec<Pattern<'a, T>>), -} - -impl<'a, T> Pattern<'a, T> { - pub fn to_owned(&self) -> Pattern<'static, T> - where - T: Clone, - { - match self { - Pattern::Id(id, t) => Pattern::Id(id.to_owned(), t.clone()), - Pattern::Tuple(pats) => { - Pattern::Tuple(pats.into_iter().map(Pattern::to_owned).collect()) - } - } - } - - pub fn traverse_type<F, U, E>(self, f: F) -> Result<Pattern<'a, U>, E> - where - F: Fn(T) -> Result<U, E> + Clone, - { - match self { - Pattern::Id(id, t) => Ok(Pattern::Id(id, f(t)?)), - Pattern::Tuple(pats) => Ok(Pattern::Tuple( - pats.into_iter() - .map(|pat| pat.traverse_type(f.clone())) - .collect::<Result<Vec<_>, _>>()?, - )), - } - } -} - -#[derive(Debug, PartialEq, Eq, Clone)] -pub struct Binding<'a, T> { - pub pat: Pattern<'a, T>, - pub body: Expr<'a, T>, -} - -impl<'a, T> Binding<'a, T> { - fn to_owned(&self) -> Binding<'static, T> - where - T: Clone, - { - Binding { - pat: self.pat.to_owned(), - body: self.body.to_owned(), - } - } -} - -#[derive(Debug, PartialEq, Eq, Clone)] -pub enum Expr<'a, T> { - Ident(Ident<'a>, T), - - Literal(Literal<'a>, T), - - Tuple(Vec<Expr<'a, T>>, T), - - UnaryOp { - op: UnaryOperator, - rhs: Box<Expr<'a, T>>, - type_: T, - }, - - BinaryOp { - lhs: Box<Expr<'a, T>>, - op: BinaryOperator, - rhs: Box<Expr<'a, T>>, - type_: T, - }, - - Let { - bindings: Vec<Binding<'a, T>>, - body: Box<Expr<'a, T>>, - type_: T, - }, - - If { - condition: Box<Expr<'a, T>>, - then: Box<Expr<'a, T>>, - else_: Box<Expr<'a, T>>, - type_: T, - }, - - Fun { - type_args: Vec<Ident<'a>>, - args: Vec<(Ident<'a>, T)>, - body: Box<Expr<'a, T>>, - type_: T, - }, - - Call { - fun: Box<Expr<'a, T>>, - type_args: HashMap<Ident<'a>, T>, - args: Vec<Expr<'a, T>>, - type_: T, - }, -} - -impl<'a, T> Expr<'a, T> { - pub fn type_(&self) -> &T { - match self { - Expr::Ident(_, t) => t, - Expr::Literal(_, t) => t, - Expr::Tuple(_, t) => t, - Expr::UnaryOp { type_, .. } => type_, - Expr::BinaryOp { type_, .. } => type_, - Expr::Let { type_, .. } => type_, - Expr::If { type_, .. } => type_, - Expr::Fun { type_, .. } => type_, - Expr::Call { type_, .. } => type_, - } - } - - pub fn traverse_type<F, U, E>(self, f: F) -> Result<Expr<'a, U>, E> - where - F: Fn(T) -> Result<U, E> + Clone, - { - match self { - Expr::Ident(id, t) => Ok(Expr::Ident(id, f(t)?)), - Expr::Literal(lit, t) => Ok(Expr::Literal(lit, f(t)?)), - Expr::UnaryOp { op, rhs, type_ } => Ok(Expr::UnaryOp { - op, - rhs: Box::new(rhs.traverse_type(f.clone())?), - type_: f(type_)?, - }), - Expr::BinaryOp { - lhs, - op, - rhs, - type_, - } => Ok(Expr::BinaryOp { - lhs: Box::new(lhs.traverse_type(f.clone())?), - op, - rhs: Box::new(rhs.traverse_type(f.clone())?), - type_: f(type_)?, - }), - Expr::Let { - bindings, - body, - type_, - } => Ok(Expr::Let { - bindings: bindings - .into_iter() - .map(|Binding { pat, body }| { - Ok(Binding { - pat: pat.traverse_type(f.clone())?, - body: body.traverse_type(f.clone())?, - }) - }) - .collect::<Result<Vec<_>, E>>()?, - body: Box::new(body.traverse_type(f.clone())?), - type_: f(type_)?, - }), - Expr::If { - condition, - then, - else_, - type_, - } => Ok(Expr::If { - condition: Box::new(condition.traverse_type(f.clone())?), - then: Box::new(then.traverse_type(f.clone())?), - else_: Box::new(else_.traverse_type(f.clone())?), - type_: f(type_)?, - }), - Expr::Fun { - args, - type_args, - body, - type_, - } => Ok(Expr::Fun { - args: args - .into_iter() - .map(|(id, t)| Ok((id, f.clone()(t)?))) - .collect::<Result<Vec<_>, E>>()?, - type_args, - body: Box::new(body.traverse_type(f.clone())?), - type_: f(type_)?, - }), - Expr::Call { - fun, - type_args, - args, - type_, - } => Ok(Expr::Call { - fun: Box::new(fun.traverse_type(f.clone())?), - type_args: type_args - .into_iter() - .map(|(id, ty)| Ok((id, f.clone()(ty)?))) - .collect::<Result<HashMap<_, _>, E>>()?, - args: args - .into_iter() - .map(|e| e.traverse_type(f.clone())) - .collect::<Result<Vec<_>, E>>()?, - type_: f(type_)?, - }), - Expr::Tuple(members, t) => Ok(Expr::Tuple( - members - .into_iter() - .map(|t| t.traverse_type(f.clone())) - .try_collect()?, - f(t)?, - )), - } - } - - pub fn to_owned(&self) -> Expr<'static, T> - where - T: Clone, - { - match self { - Expr::Ident(id, t) => Expr::Ident(id.to_owned(), t.clone()), - Expr::Literal(lit, t) => Expr::Literal(lit.to_owned(), t.clone()), - Expr::UnaryOp { op, rhs, type_ } => Expr::UnaryOp { - op: *op, - rhs: Box::new((**rhs).to_owned()), - type_: type_.clone(), - }, - Expr::BinaryOp { - lhs, - op, - rhs, - type_, - } => Expr::BinaryOp { - lhs: Box::new((**lhs).to_owned()), - op: *op, - rhs: Box::new((**rhs).to_owned()), - type_: type_.clone(), - }, - Expr::Let { - bindings, - body, - type_, - } => Expr::Let { - bindings: bindings.iter().map(|b| b.to_owned()).collect(), - body: Box::new((**body).to_owned()), - type_: type_.clone(), - }, - Expr::If { - condition, - then, - else_, - type_, - } => Expr::If { - condition: Box::new((**condition).to_owned()), - then: Box::new((**then).to_owned()), - else_: Box::new((**else_).to_owned()), - type_: type_.clone(), - }, - Expr::Fun { - args, - type_args, - body, - type_, - } => Expr::Fun { - args: args - .iter() - .map(|(id, t)| (id.to_owned(), t.clone())) - .collect(), - type_args: type_args.iter().map(|arg| arg.to_owned()).collect(), - body: Box::new((**body).to_owned()), - type_: type_.clone(), - }, - Expr::Call { - fun, - type_args, - args, - type_, - } => Expr::Call { - fun: Box::new((**fun).to_owned()), - type_args: type_args - .iter() - .map(|(id, t)| (id.to_owned(), t.clone())) - .collect(), - args: args.iter().map(|e| e.to_owned()).collect(), - type_: type_.clone(), - }, - Expr::Tuple(members, t) => { - Expr::Tuple(members.into_iter().map(Expr::to_owned).collect(), t.clone()) - } - } - } -} - -#[derive(Debug, Clone, PartialEq, Eq)] -pub enum Decl<'a, T> { - Fun { - name: Ident<'a>, - type_args: Vec<Ident<'a>>, - args: Vec<(Ident<'a>, T)>, - body: Box<Expr<'a, T>>, - type_: T, - }, - - Extern { - name: Ident<'a>, - arg_types: Vec<T>, - ret_type: T, - }, -} - -impl<'a, T> Decl<'a, T> { - pub fn name(&self) -> &Ident<'a> { - match self { - Decl::Fun { name, .. } => name, - Decl::Extern { name, .. } => name, - } - } - - pub fn set_name(&mut self, new_name: Ident<'a>) { - match self { - Decl::Fun { name, .. } => *name = new_name, - Decl::Extern { name, .. } => *name = new_name, - } - } - - pub fn type_(&self) -> Option<&T> { - match self { - Decl::Fun { type_, .. } => Some(type_), - Decl::Extern { .. } => None, - } - } - - pub fn traverse_type<F, U, E>(self, f: F) -> Result<Decl<'a, U>, E> - where - F: Fn(T) -> Result<U, E> + Clone, - { - match self { - Decl::Fun { - name, - type_args, - args, - body, - type_, - } => Ok(Decl::Fun { - name, - type_args, - args: args - .into_iter() - .map(|(id, t)| Ok((id, f(t)?))) - .try_collect()?, - body: Box::new(body.traverse_type(f.clone())?), - type_: f(type_)?, - }), - Decl::Extern { - name, - arg_types, - ret_type, - } => Ok(Decl::Extern { - name, - arg_types: arg_types.into_iter().map(f.clone()).try_collect()?, - ret_type: f(ret_type)?, - }), - } - } -} diff --git a/users/grfn/achilles/src/ast/mod.rs b/users/grfn/achilles/src/ast/mod.rs deleted file mode 100644 index 5438d29d2c..0000000000 --- a/users/grfn/achilles/src/ast/mod.rs +++ /dev/null @@ -1,484 +0,0 @@ -pub(crate) mod hir; - -use std::borrow::Cow; -use std::collections::HashMap; -use std::convert::TryFrom; -use std::fmt::{self, Display, Formatter}; - -use itertools::Itertools; - -#[derive(Debug, PartialEq, Eq)] -pub struct InvalidIdentifier<'a>(Cow<'a, str>); - -#[derive(Debug, PartialEq, Eq, Hash, Clone)] -pub struct Ident<'a>(pub Cow<'a, str>); - -impl<'a> From<&'a Ident<'a>> for &'a str { - fn from(id: &'a Ident<'a>) -> Self { - id.0.as_ref() - } -} - -impl<'a> Display for Ident<'a> { - fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result { - write!(f, "{}", self.0) - } -} - -impl<'a> Ident<'a> { - pub fn to_owned(&self) -> Ident<'static> { - Ident(Cow::Owned(self.0.clone().into_owned())) - } - - /// Construct an identifier from a &str without checking that it's a valid identifier - pub fn from_str_unchecked(s: &'a str) -> Self { - debug_assert!(is_valid_identifier(s)); - Self(Cow::Borrowed(s)) - } - - pub fn from_string_unchecked(s: String) -> Self { - debug_assert!(is_valid_identifier(&s)); - Self(Cow::Owned(s)) - } -} - -pub fn is_valid_identifier<S>(s: &S) -> bool -where - S: AsRef<str> + ?Sized, -{ - s.as_ref() - .chars() - .any(|c| !c.is_alphanumeric() || !"_".contains(c)) -} - -impl<'a> TryFrom<&'a str> for Ident<'a> { - type Error = InvalidIdentifier<'a>; - - fn try_from(s: &'a str) -> Result<Self, Self::Error> { - if is_valid_identifier(s) { - Ok(Ident(Cow::Borrowed(s))) - } else { - Err(InvalidIdentifier(Cow::Borrowed(s))) - } - } -} - -impl<'a> TryFrom<String> for Ident<'a> { - type Error = InvalidIdentifier<'static>; - - fn try_from(s: String) -> Result<Self, Self::Error> { - if is_valid_identifier(&s) { - Ok(Ident(Cow::Owned(s))) - } else { - Err(InvalidIdentifier(Cow::Owned(s))) - } - } -} - -#[derive(Debug, PartialEq, Eq, Copy, Clone)] -pub enum BinaryOperator { - /// `+` - Add, - - /// `-` - Sub, - - /// `*` - Mul, - - /// `/` - Div, - - /// `^` - Pow, - - /// `==` - Equ, - - /// `!=` - Neq, -} - -#[derive(Debug, PartialEq, Eq, Copy, Clone)] -pub enum UnaryOperator { - /// ! - Not, - - /// - - Neg, -} - -#[derive(Debug, PartialEq, Eq, Clone)] -pub enum Literal<'a> { - Unit, - Int(u64), - Bool(bool), - String(Cow<'a, str>), -} - -impl<'a> Literal<'a> { - pub fn to_owned(&self) -> Literal<'static> { - match self { - Literal::Int(i) => Literal::Int(*i), - Literal::Bool(b) => Literal::Bool(*b), - Literal::String(s) => Literal::String(Cow::Owned(s.clone().into_owned())), - Literal::Unit => Literal::Unit, - } - } -} - -#[derive(Debug, PartialEq, Eq, Clone)] -pub enum Pattern<'a> { - Id(Ident<'a>), - Tuple(Vec<Pattern<'a>>), -} - -impl<'a> Pattern<'a> { - pub fn to_owned(&self) -> Pattern<'static> { - match self { - Pattern::Id(id) => Pattern::Id(id.to_owned()), - Pattern::Tuple(pats) => Pattern::Tuple(pats.iter().map(Pattern::to_owned).collect()), - } - } -} - -#[derive(Debug, PartialEq, Eq, Clone)] -pub struct Binding<'a> { - pub pat: Pattern<'a>, - pub type_: Option<Type<'a>>, - pub body: Expr<'a>, -} - -impl<'a> Binding<'a> { - fn to_owned(&self) -> Binding<'static> { - Binding { - pat: self.pat.to_owned(), - type_: self.type_.as_ref().map(|t| t.to_owned()), - body: self.body.to_owned(), - } - } -} - -#[derive(Debug, PartialEq, Eq, Clone)] -pub enum Expr<'a> { - Ident(Ident<'a>), - - Literal(Literal<'a>), - - UnaryOp { - op: UnaryOperator, - rhs: Box<Expr<'a>>, - }, - - BinaryOp { - lhs: Box<Expr<'a>>, - op: BinaryOperator, - rhs: Box<Expr<'a>>, - }, - - Let { - bindings: Vec<Binding<'a>>, - body: Box<Expr<'a>>, - }, - - If { - condition: Box<Expr<'a>>, - then: Box<Expr<'a>>, - else_: Box<Expr<'a>>, - }, - - Fun(Box<Fun<'a>>), - - Call { - fun: Box<Expr<'a>>, - args: Vec<Expr<'a>>, - }, - - Tuple(Vec<Expr<'a>>), - - Ascription { - expr: Box<Expr<'a>>, - type_: Type<'a>, - }, -} - -impl<'a> Expr<'a> { - pub fn to_owned(&self) -> Expr<'static> { - match self { - Expr::Ident(ref id) => Expr::Ident(id.to_owned()), - Expr::Literal(ref lit) => Expr::Literal(lit.to_owned()), - Expr::Tuple(ref members) => { - Expr::Tuple(members.into_iter().map(Expr::to_owned).collect()) - } - Expr::UnaryOp { op, rhs } => Expr::UnaryOp { - op: *op, - rhs: Box::new((**rhs).to_owned()), - }, - Expr::BinaryOp { lhs, op, rhs } => Expr::BinaryOp { - lhs: Box::new((**lhs).to_owned()), - op: *op, - rhs: Box::new((**rhs).to_owned()), - }, - Expr::Let { bindings, body } => Expr::Let { - bindings: bindings.iter().map(|binding| binding.to_owned()).collect(), - body: Box::new((**body).to_owned()), - }, - Expr::If { - condition, - then, - else_, - } => Expr::If { - condition: Box::new((**condition).to_owned()), - then: Box::new((**then).to_owned()), - else_: Box::new((**else_).to_owned()), - }, - Expr::Fun(fun) => Expr::Fun(Box::new((**fun).to_owned())), - Expr::Call { fun, args } => Expr::Call { - fun: Box::new((**fun).to_owned()), - args: args.iter().map(|arg| arg.to_owned()).collect(), - }, - Expr::Ascription { expr, type_ } => Expr::Ascription { - expr: Box::new((**expr).to_owned()), - type_: type_.to_owned(), - }, - } - } -} - -#[derive(Debug, PartialEq, Eq, Clone)] -pub struct Arg<'a> { - pub ident: Ident<'a>, - pub type_: Option<Type<'a>>, -} - -impl<'a> Arg<'a> { - pub fn to_owned(&self) -> Arg<'static> { - Arg { - ident: self.ident.to_owned(), - type_: self.type_.as_ref().map(Type::to_owned), - } - } -} - -impl<'a> TryFrom<&'a str> for Arg<'a> { - type Error = <Ident<'a> as TryFrom<&'a str>>::Error; - - fn try_from(value: &'a str) -> Result<Self, Self::Error> { - Ok(Arg { - ident: Ident::try_from(value)?, - type_: None, - }) - } -} - -#[derive(Debug, PartialEq, Eq, Clone)] -pub struct Fun<'a> { - pub args: Vec<Arg<'a>>, - pub body: Expr<'a>, -} - -impl<'a> Fun<'a> { - pub fn to_owned(&self) -> Fun<'static> { - Fun { - args: self.args.iter().map(|arg| arg.to_owned()).collect(), - body: self.body.to_owned(), - } - } -} - -#[derive(Debug, PartialEq, Eq, Clone)] -pub enum Decl<'a> { - Fun { - name: Ident<'a>, - body: Fun<'a>, - }, - Ascription { - name: Ident<'a>, - type_: Type<'a>, - }, - Extern { - name: Ident<'a>, - type_: FunctionType<'a>, - }, -} - -//// - -#[derive(Debug, PartialEq, Eq, Clone)] -pub struct FunctionType<'a> { - pub args: Vec<Type<'a>>, - pub ret: Box<Type<'a>>, -} - -impl<'a> FunctionType<'a> { - pub fn to_owned(&self) -> FunctionType<'static> { - FunctionType { - args: self.args.iter().map(|a| a.to_owned()).collect(), - ret: Box::new((*self.ret).to_owned()), - } - } -} - -impl<'a> Display for FunctionType<'a> { - fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result { - write!(f, "fn {} -> {}", self.args.iter().join(", "), self.ret) - } -} - -#[derive(Debug, PartialEq, Eq, Clone)] -pub enum Type<'a> { - Int, - Float, - Bool, - CString, - Unit, - Tuple(Vec<Type<'a>>), - Var(Ident<'a>), - Function(FunctionType<'a>), -} - -impl<'a> Type<'a> { - pub fn to_owned(&self) -> Type<'static> { - match self { - Type::Int => Type::Int, - Type::Float => Type::Float, - Type::Bool => Type::Bool, - Type::CString => Type::CString, - Type::Unit => Type::Unit, - Type::Var(v) => Type::Var(v.to_owned()), - Type::Function(f) => Type::Function(f.to_owned()), - Type::Tuple(members) => Type::Tuple(members.iter().map(Type::to_owned).collect()), - } - } - - pub fn alpha_equiv(&self, other: &Self) -> bool { - fn do_alpha_equiv<'a>( - substs: &mut HashMap<&'a Ident<'a>, &'a Ident<'a>>, - lhs: &'a Type, - rhs: &'a Type, - ) -> bool { - match (lhs, rhs) { - (Type::Var(v1), Type::Var(v2)) => substs.entry(v1).or_insert(v2) == &v2, - ( - Type::Function(FunctionType { - args: args1, - ret: ret1, - }), - Type::Function(FunctionType { - args: args2, - ret: ret2, - }), - ) => { - args1.len() == args2.len() - && args1 - .iter() - .zip(args2) - .all(|(a1, a2)| do_alpha_equiv(substs, a1, a2)) - && do_alpha_equiv(substs, ret1, ret2) - } - _ => lhs == rhs, - } - } - - let mut substs = HashMap::new(); - do_alpha_equiv(&mut substs, self, other) - } - - pub fn traverse_type_vars<'b, F>(self, mut f: F) -> Type<'b> - where - F: FnMut(Ident<'a>) -> Type<'b> + Clone, - { - match self { - Type::Var(tv) => f(tv), - Type::Function(FunctionType { args, ret }) => Type::Function(FunctionType { - args: args - .into_iter() - .map(|t| t.traverse_type_vars(f.clone())) - .collect(), - ret: Box::new(ret.traverse_type_vars(f)), - }), - Type::Int => Type::Int, - Type::Float => Type::Float, - Type::Bool => Type::Bool, - Type::CString => Type::CString, - Type::Tuple(members) => Type::Tuple( - members - .into_iter() - .map(|t| t.traverse_type_vars(f.clone())) - .collect(), - ), - Type::Unit => Type::Unit, - } - } - - pub fn as_tuple(&self) -> Option<&Vec<Type<'a>>> { - if let Self::Tuple(v) = self { - Some(v) - } else { - None - } - } -} - -impl<'a> Display for Type<'a> { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - Type::Int => f.write_str("int"), - Type::Float => f.write_str("float"), - Type::Bool => f.write_str("bool"), - Type::CString => f.write_str("cstring"), - Type::Unit => f.write_str("()"), - Type::Var(v) => v.fmt(f), - Type::Function(ft) => ft.fmt(f), - Type::Tuple(ms) => write!(f, "({})", ms.iter().join(", ")), - } - } -} - -#[cfg(test)] -mod tests { - use super::*; - - fn type_var(n: &str) -> Type<'static> { - Type::Var(Ident::try_from(n.to_owned()).unwrap()) - } - - mod alpha_equiv { - use super::*; - - #[test] - fn trivial() { - assert!(Type::Int.alpha_equiv(&Type::Int)); - assert!(!Type::Int.alpha_equiv(&Type::Bool)); - } - - #[test] - fn simple_type_var() { - assert!(type_var("a").alpha_equiv(&type_var("b"))); - } - - #[test] - fn function_with_type_vars_equiv() { - assert!(Type::Function(FunctionType { - args: vec![type_var("a")], - ret: Box::new(type_var("b")), - }) - .alpha_equiv(&Type::Function(FunctionType { - args: vec![type_var("b")], - ret: Box::new(type_var("a")), - }))) - } - - #[test] - fn function_with_type_vars_non_equiv() { - assert!(!Type::Function(FunctionType { - args: vec![type_var("a")], - ret: Box::new(type_var("a")), - }) - .alpha_equiv(&Type::Function(FunctionType { - args: vec![type_var("b")], - ret: Box::new(type_var("a")), - }))) - } - } -} diff --git a/users/grfn/achilles/src/codegen/llvm.rs b/users/grfn/achilles/src/codegen/llvm.rs deleted file mode 100644 index 9a71ac954e..0000000000 --- a/users/grfn/achilles/src/codegen/llvm.rs +++ /dev/null @@ -1,486 +0,0 @@ -use std::convert::{TryFrom, TryInto}; -use std::path::Path; -use std::result; - -use inkwell::basic_block::BasicBlock; -use inkwell::builder::Builder; -pub use inkwell::context::Context; -use inkwell::module::Module; -use inkwell::support::LLVMString; -use inkwell::types::{BasicType, BasicTypeEnum, FunctionType, IntType, StructType}; -use inkwell::values::{AnyValueEnum, BasicValueEnum, FunctionValue, StructValue}; -use inkwell::{AddressSpace, IntPredicate}; -use itertools::Itertools; -use thiserror::Error; - -use crate::ast::hir::{Binding, Decl, Expr, Pattern}; -use crate::ast::{BinaryOperator, Ident, Literal, Type, UnaryOperator}; -use crate::common::env::Env; - -#[derive(Debug, PartialEq, Eq, Error)] -pub enum Error { - #[error("Undefined variable {0}")] - UndefinedVariable(Ident<'static>), - - #[error("LLVM Error: {0}")] - LLVMError(String), -} - -impl From<LLVMString> for Error { - fn from(s: LLVMString) -> Self { - Self::LLVMError(s.to_string()) - } -} - -pub type Result<T> = result::Result<T, Error>; - -pub struct Codegen<'ctx, 'ast> { - context: &'ctx Context, - pub module: Module<'ctx>, - builder: Builder<'ctx>, - env: Env<&'ast Ident<'ast>, AnyValueEnum<'ctx>>, - function_stack: Vec<FunctionValue<'ctx>>, - identifier_counter: u32, -} - -impl<'ctx, 'ast> Codegen<'ctx, 'ast> { - pub fn new(context: &'ctx Context, module_name: &str) -> Self { - let module = context.create_module(module_name); - let builder = context.create_builder(); - Self { - context, - module, - builder, - env: Default::default(), - function_stack: Default::default(), - identifier_counter: 0, - } - } - - pub fn new_function<'a>( - &'a mut self, - name: &str, - ty: FunctionType<'ctx>, - ) -> &'a FunctionValue<'ctx> { - self.function_stack - .push(self.module.add_function(name, ty, None)); - let basic_block = self.append_basic_block("entry"); - self.builder.position_at_end(basic_block); - self.function_stack.last().unwrap() - } - - pub fn finish_function(&mut self, res: Option<&BasicValueEnum<'ctx>>) -> FunctionValue<'ctx> { - self.builder.build_return(match res { - // lol - Some(val) => Some(val), - None => None, - }); - self.function_stack.pop().unwrap() - } - - pub fn append_basic_block(&self, name: &str) -> BasicBlock<'ctx> { - self.context - .append_basic_block(*self.function_stack.last().unwrap(), name) - } - - fn bind_pattern(&mut self, pat: &'ast Pattern<'ast, Type>, val: AnyValueEnum<'ctx>) { - match pat { - Pattern::Id(id, _) => self.env.set(id, val), - Pattern::Tuple(pats) => { - for (i, pat) in pats.iter().enumerate() { - let member = self - .builder - .build_extract_value( - StructValue::try_from(val).unwrap(), - i as _, - "pat_bind", - ) - .unwrap(); - self.bind_pattern(pat, member.into()); - } - } - } - } - - pub fn codegen_expr( - &mut self, - expr: &'ast Expr<'ast, Type>, - ) -> Result<Option<AnyValueEnum<'ctx>>> { - match expr { - Expr::Ident(id, _) => self - .env - .resolve(id) - .cloned() - .ok_or_else(|| Error::UndefinedVariable(id.to_owned())) - .map(Some), - Expr::Literal(lit, ty) => { - let ty = self.codegen_int_type(ty); - match lit { - Literal::Int(i) => Ok(Some(AnyValueEnum::IntValue(ty.const_int(*i, false)))), - Literal::Bool(b) => Ok(Some(AnyValueEnum::IntValue( - ty.const_int(if *b { 1 } else { 0 }, false), - ))), - Literal::String(s) => Ok(Some( - self.builder - .build_global_string_ptr(s, "s") - .as_pointer_value() - .into(), - )), - Literal::Unit => Ok(None), - } - } - Expr::UnaryOp { op, rhs, .. } => { - let rhs = self.codegen_expr(rhs)?.unwrap(); - match op { - UnaryOperator::Not => unimplemented!(), - UnaryOperator::Neg => Ok(Some(AnyValueEnum::IntValue( - self.builder.build_int_neg(rhs.into_int_value(), "neg"), - ))), - } - } - Expr::BinaryOp { lhs, op, rhs, .. } => { - let lhs = self.codegen_expr(lhs)?.unwrap(); - let rhs = self.codegen_expr(rhs)?.unwrap(); - match op { - BinaryOperator::Add => { - Ok(Some(AnyValueEnum::IntValue(self.builder.build_int_add( - lhs.into_int_value(), - rhs.into_int_value(), - "add", - )))) - } - BinaryOperator::Sub => { - Ok(Some(AnyValueEnum::IntValue(self.builder.build_int_sub( - lhs.into_int_value(), - rhs.into_int_value(), - "add", - )))) - } - BinaryOperator::Mul => { - Ok(Some(AnyValueEnum::IntValue(self.builder.build_int_sub( - lhs.into_int_value(), - rhs.into_int_value(), - "add", - )))) - } - BinaryOperator::Div => Ok(Some(AnyValueEnum::IntValue( - self.builder.build_int_signed_div( - lhs.into_int_value(), - rhs.into_int_value(), - "add", - ), - ))), - BinaryOperator::Pow => unimplemented!(), - BinaryOperator::Equ => Ok(Some(AnyValueEnum::IntValue( - self.builder.build_int_compare( - IntPredicate::EQ, - lhs.into_int_value(), - rhs.into_int_value(), - "eq", - ), - ))), - BinaryOperator::Neq => todo!(), - } - } - Expr::Let { bindings, body, .. } => { - self.env.push(); - for Binding { pat, body, .. } in bindings { - if let Some(val) = self.codegen_expr(body)? { - self.bind_pattern(pat, val); - } - } - let res = self.codegen_expr(body); - self.env.pop(); - res - } - Expr::If { - condition, - then, - else_, - type_, - } => { - let then_block = self.append_basic_block("then"); - let else_block = self.append_basic_block("else"); - let join_block = self.append_basic_block("join"); - let condition = self.codegen_expr(condition)?.unwrap(); - self.builder.build_conditional_branch( - condition.into_int_value(), - then_block, - else_block, - ); - self.builder.position_at_end(then_block); - let then_res = self.codegen_expr(then)?; - self.builder.build_unconditional_branch(join_block); - - self.builder.position_at_end(else_block); - let else_res = self.codegen_expr(else_)?; - self.builder.build_unconditional_branch(join_block); - - self.builder.position_at_end(join_block); - if let Some(phi_type) = self.codegen_type(type_) { - let phi = self.builder.build_phi(phi_type, "join"); - phi.add_incoming(&[ - ( - &BasicValueEnum::try_from(then_res.unwrap()).unwrap(), - then_block, - ), - ( - &BasicValueEnum::try_from(else_res.unwrap()).unwrap(), - else_block, - ), - ]); - Ok(Some(phi.as_basic_value().into())) - } else { - Ok(None) - } - } - Expr::Call { fun, args, .. } => { - if let Expr::Ident(id, _) = &**fun { - let function = self - .module - .get_function(id.into()) - .or_else(|| self.env.resolve(id)?.clone().try_into().ok()) - .ok_or_else(|| Error::UndefinedVariable(id.to_owned()))?; - let args = args - .iter() - .map(|arg| Ok(self.codegen_expr(arg)?.unwrap().try_into().unwrap())) - .collect::<Result<Vec<_>>>()?; - Ok(self - .builder - .build_call(function, &args, "call") - .try_as_basic_value() - .left() - .map(|val| val.into())) - } else { - todo!() - } - } - Expr::Fun { args, body, .. } => { - let fname = self.fresh_ident("f"); - let cur_block = self.builder.get_insert_block().unwrap(); - let env = self.env.save(); // TODO: closures - let function = self.codegen_function(&fname, args, body)?; - self.builder.position_at_end(cur_block); - self.env.restore(env); - Ok(Some(function.into())) - } - Expr::Tuple(members, ty) => { - let values = members - .into_iter() - .map(|expr| self.codegen_expr(expr)) - .collect::<Result<Vec<_>>>()? - .into_iter() - .filter_map(|x| x) - .map(|x| x.try_into().unwrap()) - .collect_vec(); - let field_types = ty.as_tuple().unwrap(); - let tuple_type = self.codegen_tuple_type(field_types); - Ok(Some(tuple_type.const_named_struct(&values).into())) - } - } - } - - pub fn codegen_function( - &mut self, - name: &str, - args: &'ast [(Ident<'ast>, Type)], - body: &'ast Expr<'ast, Type>, - ) -> Result<FunctionValue<'ctx>> { - let arg_types = args - .iter() - .filter_map(|(_, at)| self.codegen_type(at)) - .collect::<Vec<_>>(); - - self.new_function( - name, - match self.codegen_type(body.type_()) { - Some(ret_ty) => ret_ty.fn_type(&arg_types, false), - None => self.context.void_type().fn_type(&arg_types, false), - }, - ); - self.env.push(); - for (i, (arg, _)) in args.iter().enumerate() { - self.env.set( - arg, - self.cur_function().get_nth_param(i as u32).unwrap().into(), - ); - } - let res = self.codegen_expr(body)?; - self.env.pop(); - Ok(self.finish_function(res.map(|av| av.try_into().unwrap()).as_ref())) - } - - pub fn codegen_extern( - &mut self, - name: &str, - args: &'ast [Type], - ret: &'ast Type, - ) -> Result<()> { - let arg_types = args - .iter() - .map(|t| self.codegen_type(t).unwrap()) - .collect::<Vec<_>>(); - self.module.add_function( - name, - match self.codegen_type(ret) { - Some(ret_ty) => ret_ty.fn_type(&arg_types, false), - None => self.context.void_type().fn_type(&arg_types, false), - }, - None, - ); - Ok(()) - } - - pub fn codegen_decl(&mut self, decl: &'ast Decl<'ast, Type>) -> Result<()> { - match decl { - Decl::Fun { - name, args, body, .. - } => { - self.codegen_function(name.into(), args, body)?; - Ok(()) - } - Decl::Extern { - name, - arg_types, - ret_type, - } => self.codegen_extern(name.into(), arg_types, ret_type), - } - } - - pub fn codegen_main(&mut self, expr: &'ast Expr<'ast, Type>) -> Result<()> { - self.new_function("main", self.context.i64_type().fn_type(&[], false)); - let res = self.codegen_expr(expr)?; - if *expr.type_() != Type::Int { - self.builder - .build_return(Some(&self.context.i64_type().const_int(0, false))); - } else { - self.finish_function(res.map(|r| r.try_into().unwrap()).as_ref()); - } - Ok(()) - } - - fn codegen_type(&self, type_: &'ast Type) -> Option<BasicTypeEnum<'ctx>> { - // TODO - match type_ { - Type::Int => Some(self.context.i64_type().into()), - Type::Float => Some(self.context.f64_type().into()), - Type::Bool => Some(self.context.bool_type().into()), - Type::CString => Some( - self.context - .i8_type() - .ptr_type(AddressSpace::Generic) - .into(), - ), - Type::Function(_) => todo!(), - Type::Var(_) => unreachable!(), - Type::Unit => None, - Type::Tuple(ts) => Some(self.codegen_tuple_type(ts).into()), - } - } - - fn codegen_tuple_type(&self, ts: &'ast [Type]) -> StructType<'ctx> { - self.context.struct_type( - ts.iter() - .filter_map(|t| self.codegen_type(t)) - .collect_vec() - .as_slice(), - false, - ) - } - - fn codegen_int_type(&self, type_: &'ast Type) -> IntType<'ctx> { - // TODO - self.context.i64_type() - } - - pub fn print_to_file<P>(&self, path: P) -> Result<()> - where - P: AsRef<Path>, - { - Ok(self.module.print_to_file(path)?) - } - - pub fn binary_to_file<P>(&self, path: P) -> Result<()> - where - P: AsRef<Path>, - { - if self.module.write_bitcode_to_path(path.as_ref()) { - Ok(()) - } else { - Err(Error::LLVMError( - "Error writing bitcode to output path".to_owned(), - )) - } - } - - fn fresh_ident(&mut self, prefix: &str) -> String { - self.identifier_counter += 1; - format!("{}{}", prefix, self.identifier_counter) - } - - fn cur_function(&self) -> &FunctionValue<'ctx> { - self.function_stack.last().unwrap() - } -} - -#[cfg(test)] -mod tests { - use inkwell::execution_engine::JitFunction; - use inkwell::OptimizationLevel; - - use super::*; - - fn jit_eval<T>(expr: &str) -> anyhow::Result<T> { - let expr = crate::parser::expr(expr).unwrap().1; - - let expr = crate::tc::typecheck_expr(expr).unwrap(); - - let context = Context::create(); - let mut codegen = Codegen::new(&context, "test"); - let execution_engine = codegen - .module - .create_jit_execution_engine(OptimizationLevel::None) - .unwrap(); - - codegen.codegen_function("test", &[], &expr)?; - - unsafe { - let fun: JitFunction<unsafe extern "C" fn() -> T> = - execution_engine.get_function("test")?; - Ok(fun.call()) - } - } - - #[test] - fn add_literals() { - assert_eq!(jit_eval::<i64>("1 + 2").unwrap(), 3); - } - - #[test] - fn variable_shadowing() { - assert_eq!( - jit_eval::<i64>("let x = 1 in (let x = 2 in x) + x").unwrap(), - 3 - ); - } - - #[test] - fn eq() { - assert_eq!( - jit_eval::<i64>("let x = 1 in if x == 1 then 2 else 4").unwrap(), - 2 - ); - } - - #[test] - fn function_call() { - let res = jit_eval::<i64>("let id = fn x = x in id 1").unwrap(); - assert_eq!(res, 1); - } - - #[test] - fn bind_tuple_pattern() { - let res = jit_eval::<i64>("let (x, y) = (1, 2) in x + y").unwrap(); - assert_eq!(res, 3); - } -} diff --git a/users/grfn/achilles/src/codegen/mod.rs b/users/grfn/achilles/src/codegen/mod.rs deleted file mode 100644 index 8ef057dba0..0000000000 --- a/users/grfn/achilles/src/codegen/mod.rs +++ /dev/null @@ -1,25 +0,0 @@ -pub mod llvm; - -use inkwell::execution_engine::JitFunction; -use inkwell::OptimizationLevel; -pub use llvm::*; - -use crate::ast::hir::Expr; -use crate::ast::Type; -use crate::common::Result; - -pub fn jit_eval<T>(expr: &Expr<Type>) -> Result<T> { - let context = Context::create(); - let mut codegen = Codegen::new(&context, "eval"); - let execution_engine = codegen - .module - .create_jit_execution_engine(OptimizationLevel::None) - .map_err(Error::from)?; - codegen.codegen_function("test", &[], &expr)?; - - unsafe { - let fun: JitFunction<unsafe extern "C" fn() -> T> = - execution_engine.get_function("eval").unwrap(); - Ok(fun.call()) - } -} diff --git a/users/grfn/achilles/src/commands/check.rs b/users/grfn/achilles/src/commands/check.rs deleted file mode 100644 index 0bea482c14..0000000000 --- a/users/grfn/achilles/src/commands/check.rs +++ /dev/null @@ -1,39 +0,0 @@ -use clap::Clap; -use std::path::PathBuf; - -use crate::ast::Type; -use crate::{parser, tc, Result}; - -/// Typecheck a file or expression -#[derive(Clap)] -pub struct Check { - /// File to check - path: Option<PathBuf>, - - /// Expression to check - #[clap(long, short = 'e')] - expr: Option<String>, -} - -fn run_expr(expr: String) -> Result<Type<'static>> { - let (_, parsed) = parser::expr(&expr)?; - let hir_expr = tc::typecheck_expr(parsed)?; - Ok(hir_expr.type_().to_owned()) -} - -fn run_path(path: PathBuf) -> Result<Type<'static>> { - todo!() -} - -impl Check { - pub fn run(self) -> Result<()> { - let type_ = match (self.path, self.expr) { - (None, None) => Err("Must specify either a file or expression to check".into()), - (Some(_), Some(_)) => Err("Cannot specify both a file and expression to check".into()), - (None, Some(expr)) => run_expr(expr), - (Some(path), None) => run_path(path), - }?; - println!("type: {}", type_); - Ok(()) - } -} diff --git a/users/grfn/achilles/src/commands/compile.rs b/users/grfn/achilles/src/commands/compile.rs deleted file mode 100644 index be8767575a..0000000000 --- a/users/grfn/achilles/src/commands/compile.rs +++ /dev/null @@ -1,31 +0,0 @@ -use std::path::PathBuf; - -use clap::Clap; - -use crate::common::Result; -use crate::compiler::{self, CompilerOptions}; - -/// Compile a source file -#[derive(Clap)] -pub struct Compile { - /// File to compile - file: PathBuf, - - /// Output file - #[clap(short = 'o')] - out_file: PathBuf, - - #[clap(flatten)] - options: CompilerOptions, -} - -impl Compile { - pub fn run(self) -> Result<()> { - eprintln!( - ">>> {} -> {}", - &self.file.to_string_lossy(), - self.out_file.to_string_lossy() - ); - compiler::compile_file(&self.file, &self.out_file, &self.options) - } -} diff --git a/users/grfn/achilles/src/commands/eval.rs b/users/grfn/achilles/src/commands/eval.rs deleted file mode 100644 index 61a712c08a..0000000000 --- a/users/grfn/achilles/src/commands/eval.rs +++ /dev/null @@ -1,32 +0,0 @@ -use clap::Clap; - -use crate::codegen; -use crate::interpreter; -use crate::parser; -use crate::tc; -use crate::Result; - -/// Evaluate an expression and print its result -#[derive(Clap)] -pub struct Eval { - /// JIT-compile with LLVM instead of interpreting - #[clap(long)] - jit: bool, - - /// Expression to evaluate - expr: String, -} - -impl Eval { - pub fn run(self) -> Result<()> { - let (_, parsed) = parser::expr(&self.expr)?; - let hir = tc::typecheck_expr(parsed)?; - let result = if self.jit { - codegen::jit_eval::<i64>(&hir)?.into() - } else { - interpreter::eval(&hir)? - }; - println!("{}", result); - Ok(()) - } -} diff --git a/users/grfn/achilles/src/commands/mod.rs b/users/grfn/achilles/src/commands/mod.rs deleted file mode 100644 index fd0a822708..0000000000 --- a/users/grfn/achilles/src/commands/mod.rs +++ /dev/null @@ -1,7 +0,0 @@ -pub mod check; -pub mod compile; -pub mod eval; - -pub use check::Check; -pub use compile::Compile; -pub use eval::Eval; diff --git a/users/grfn/achilles/src/common/env.rs b/users/grfn/achilles/src/common/env.rs deleted file mode 100644 index 59a5e46c46..0000000000 --- a/users/grfn/achilles/src/common/env.rs +++ /dev/null @@ -1,59 +0,0 @@ -use std::borrow::Borrow; -use std::collections::HashMap; -use std::hash::Hash; -use std::mem; - -/// A lexical environment -#[derive(Debug, PartialEq, Eq)] -pub struct Env<K: Eq + Hash, V>(Vec<HashMap<K, V>>); - -impl<K, V> Default for Env<K, V> -where - K: Eq + Hash, -{ - fn default() -> Self { - Self::new() - } -} - -impl<K, V> Env<K, V> -where - K: Eq + Hash, -{ - pub fn new() -> Self { - Self(vec![Default::default()]) - } - - pub fn push(&mut self) { - self.0.push(Default::default()); - } - - pub fn pop(&mut self) { - self.0.pop(); - } - - pub fn save(&mut self) -> Self { - mem::take(self) - } - - pub fn restore(&mut self, saved: Self) { - *self = saved; - } - - pub fn set(&mut self, k: K, v: V) { - self.0.last_mut().unwrap().insert(k, v); - } - - pub fn resolve<'a, Q>(&'a self, k: &Q) -> Option<&'a V> - where - K: Borrow<Q>, - Q: Hash + Eq + ?Sized, - { - for ctx in self.0.iter().rev() { - if let Some(res) = ctx.get(k) { - return Some(res); - } - } - None - } -} diff --git a/users/grfn/achilles/src/common/error.rs b/users/grfn/achilles/src/common/error.rs deleted file mode 100644 index 51575a895e..0000000000 --- a/users/grfn/achilles/src/common/error.rs +++ /dev/null @@ -1,59 +0,0 @@ -use std::{io, result}; - -use thiserror::Error; - -use crate::{codegen, interpreter, parser, tc}; - -#[derive(Error, Debug)] -pub enum Error { - #[error(transparent)] - IOError(#[from] io::Error), - - #[error("Error parsing input: {0}")] - ParseError(#[from] parser::Error), - - #[error("Error evaluating expression: {0}")] - EvalError(#[from] interpreter::Error), - - #[error("Compile error: {0}")] - CodegenError(#[from] codegen::Error), - - #[error("Type error: {0}")] - TypeError(#[from] tc::Error), - - #[error("{0}")] - Message(String), -} - -impl From<String> for Error { - fn from(s: String) -> Self { - Self::Message(s) - } -} - -impl<'a> From<&'a str> for Error { - fn from(s: &'a str) -> Self { - Self::Message(s.to_owned()) - } -} - -impl<'a> From<nom::Err<nom::error::Error<&'a str>>> for Error { - fn from(e: nom::Err<nom::error::Error<&'a str>>) -> Self { - use nom::error::Error as NomError; - use nom::Err::*; - - Self::ParseError(match e { - Incomplete(i) => Incomplete(i), - Error(NomError { input, code }) => Error(NomError { - input: input.to_owned(), - code, - }), - Failure(NomError { input, code }) => Failure(NomError { - input: input.to_owned(), - code, - }), - }) - } -} - -pub type Result<T> = result::Result<T, Error>; diff --git a/users/grfn/achilles/src/common/mod.rs b/users/grfn/achilles/src/common/mod.rs deleted file mode 100644 index 8368a6dd18..0000000000 --- a/users/grfn/achilles/src/common/mod.rs +++ /dev/null @@ -1,6 +0,0 @@ -pub(crate) mod env; -pub(crate) mod error; -pub(crate) mod namer; - -pub use error::{Error, Result}; -pub use namer::{Namer, NamerOf}; diff --git a/users/grfn/achilles/src/common/namer.rs b/users/grfn/achilles/src/common/namer.rs deleted file mode 100644 index 016e9f6ed9..0000000000 --- a/users/grfn/achilles/src/common/namer.rs +++ /dev/null @@ -1,122 +0,0 @@ -use std::fmt::Display; -use std::marker::PhantomData; - -pub struct Namer<T, F> { - make_name: F, - counter: u64, - _phantom: PhantomData<T>, -} - -impl<T, F> Namer<T, F> { - pub fn new(make_name: F) -> Self { - Namer { - make_name, - counter: 0, - _phantom: PhantomData, - } - } -} - -impl Namer<String, Box<dyn Fn(u64) -> String>> { - pub fn with_prefix<T>(prefix: T) -> Self - where - T: Display + 'static, - { - Namer::new(move |i| format!("{}{}", prefix, i)).boxed() - } - - pub fn with_suffix<T>(suffix: T) -> Self - where - T: Display + 'static, - { - Namer::new(move |i| format!("{}{}", i, suffix)).boxed() - } - - pub fn alphabetic() -> Self { - Namer::new(|i| { - if i <= 26 { - std::char::from_u32((i + 96) as u32).unwrap().to_string() - } else { - format!( - "{}{}", - std::char::from_u32(((i % 26) + 96) as u32).unwrap(), - i - 26 - ) - } - }) - .boxed() - } -} - -impl<T, F> Namer<T, F> -where - F: Fn(u64) -> T, -{ - pub fn make_name(&mut self) -> T { - self.counter += 1; - (self.make_name)(self.counter) - } - - pub fn boxed(self) -> NamerOf<T> - where - F: 'static, - { - Namer { - make_name: Box::new(self.make_name), - counter: self.counter, - _phantom: self._phantom, - } - } - - pub fn map<G, U>(self, f: G) -> NamerOf<U> - where - G: Fn(T) -> U + 'static, - T: 'static, - F: 'static, - { - Namer { - counter: self.counter, - make_name: Box::new(move |x| f((self.make_name)(x))), - _phantom: PhantomData, - } - } -} - -pub type NamerOf<T> = Namer<T, Box<dyn Fn(u64) -> T>>; - -#[cfg(test)] -mod tests { - use super::*; - - #[test] - fn prefix() { - let mut namer = Namer::with_prefix("t"); - assert_eq!(namer.make_name(), "t1"); - assert_eq!(namer.make_name(), "t2"); - } - - #[test] - fn suffix() { - let mut namer = Namer::with_suffix("t"); - assert_eq!(namer.make_name(), "1t"); - assert_eq!(namer.make_name(), "2t"); - } - - #[test] - fn alphabetic() { - let mut namer = Namer::alphabetic(); - assert_eq!(namer.make_name(), "a"); - assert_eq!(namer.make_name(), "b"); - (0..25).for_each(|_| { - namer.make_name(); - }); - assert_eq!(namer.make_name(), "b2"); - } - - #[test] - fn custom_callback() { - let mut namer = Namer::new(|n| n + 1); - assert_eq!(namer.make_name(), 2); - assert_eq!(namer.make_name(), 3); - } -} diff --git a/users/grfn/achilles/src/compiler.rs b/users/grfn/achilles/src/compiler.rs deleted file mode 100644 index 45b215473d..0000000000 --- a/users/grfn/achilles/src/compiler.rs +++ /dev/null @@ -1,89 +0,0 @@ -use std::fmt::{self, Display}; -use std::path::Path; -use std::str::FromStr; -use std::{fs, result}; - -use clap::Clap; -use test_strategy::Arbitrary; - -use crate::codegen::{self, Codegen}; -use crate::common::Result; -use crate::passes::hir::{monomorphize, strip_positive_units}; -use crate::{parser, tc}; - -#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Arbitrary)] -pub enum OutputFormat { - LLVM, - Bitcode, -} - -impl Default for OutputFormat { - fn default() -> Self { - Self::Bitcode - } -} - -impl FromStr for OutputFormat { - type Err = String; - - fn from_str(s: &str) -> result::Result<Self, Self::Err> { - match s { - "llvm" => Ok(Self::LLVM), - "binary" => Ok(Self::Bitcode), - _ => Err(format!( - "Invalid output format {}, expected one of {{llvm, binary}}", - s - )), - } - } -} - -impl Display for OutputFormat { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - OutputFormat::LLVM => f.write_str("llvm"), - OutputFormat::Bitcode => f.write_str("binary"), - } - } -} - -#[derive(Clap, Debug, PartialEq, Eq, Default)] -pub struct CompilerOptions { - #[clap(long, short = 'f', default_value)] - format: OutputFormat, -} - -pub fn compile_file(input: &Path, output: &Path, options: &CompilerOptions) -> Result<()> { - let src = fs::read_to_string(input)?; - let (_, decls) = parser::toplevel(&src)?; - let mut decls = tc::typecheck_toplevel(decls)?; - monomorphize::run_toplevel(&mut decls); - strip_positive_units::run_toplevel(&mut decls); - - let context = codegen::Context::create(); - let mut codegen = Codegen::new( - &context, - &input - .file_stem() - .map_or("UNKNOWN".to_owned(), |s| s.to_string_lossy().into_owned()), - ); - for decl in &decls { - codegen.codegen_decl(decl)?; - } - match options.format { - OutputFormat::LLVM => codegen.print_to_file(output)?, - OutputFormat::Bitcode => codegen.binary_to_file(output)?, - } - Ok(()) -} - -#[cfg(test)] -mod tests { - use super::*; - use test_strategy::proptest; - - #[proptest] - fn output_format_display_from_str_round_trip(of: OutputFormat) { - assert_eq!(OutputFormat::from_str(&of.to_string()), Ok(of)); - } -} diff --git a/users/grfn/achilles/src/interpreter/error.rs b/users/grfn/achilles/src/interpreter/error.rs deleted file mode 100644 index 268d6f479a..0000000000 --- a/users/grfn/achilles/src/interpreter/error.rs +++ /dev/null @@ -1,19 +0,0 @@ -use std::result; - -use thiserror::Error; - -use crate::ast::{Ident, Type}; - -#[derive(Debug, PartialEq, Eq, Error)] -pub enum Error { - #[error("Undefined variable {0}")] - UndefinedVariable(Ident<'static>), - - #[error("Unexpected type {actual}, expected type {expected}")] - InvalidType { - actual: Type<'static>, - expected: Type<'static>, - }, -} - -pub type Result<T> = result::Result<T, Error>; diff --git a/users/grfn/achilles/src/interpreter/mod.rs b/users/grfn/achilles/src/interpreter/mod.rs deleted file mode 100644 index 70df7a0724..0000000000 --- a/users/grfn/achilles/src/interpreter/mod.rs +++ /dev/null @@ -1,203 +0,0 @@ -mod error; -mod value; - -use itertools::Itertools; -use value::Val; - -pub use self::error::{Error, Result}; -pub use self::value::{Function, Value}; -use crate::ast::hir::{Binding, Expr, Pattern}; -use crate::ast::{BinaryOperator, FunctionType, Ident, Literal, Type, UnaryOperator}; -use crate::common::env::Env; - -#[derive(Debug, Default)] -pub struct Interpreter<'a> { - env: Env<&'a Ident<'a>, Value<'a>>, -} - -impl<'a> Interpreter<'a> { - pub fn new() -> Self { - Self::default() - } - - fn resolve(&self, var: &'a Ident<'a>) -> Result<Value<'a>> { - self.env - .resolve(var) - .cloned() - .ok_or_else(|| Error::UndefinedVariable(var.to_owned())) - } - - fn bind_pattern(&mut self, pattern: &'a Pattern<'a, Type>, value: Value<'a>) { - match pattern { - Pattern::Id(id, _) => self.env.set(id, value), - Pattern::Tuple(pats) => { - for (pat, val) in pats.iter().zip(value.as_tuple().unwrap().clone()) { - self.bind_pattern(pat, val); - } - } - } - } - - pub fn eval(&mut self, expr: &'a Expr<'a, Type>) -> Result<Value<'a>> { - let res = match expr { - Expr::Ident(id, _) => self.resolve(id), - Expr::Literal(Literal::Int(i), _) => Ok((*i).into()), - Expr::Literal(Literal::Bool(b), _) => Ok((*b).into()), - Expr::Literal(Literal::String(s), _) => Ok(s.clone().into()), - Expr::Literal(Literal::Unit, _) => unreachable!(), - Expr::UnaryOp { op, rhs, .. } => { - let rhs = self.eval(rhs)?; - match op { - UnaryOperator::Neg => -rhs, - _ => unimplemented!(), - } - } - Expr::BinaryOp { lhs, op, rhs, .. } => { - let lhs = self.eval(lhs)?; - let rhs = self.eval(rhs)?; - match op { - BinaryOperator::Add => lhs + rhs, - BinaryOperator::Sub => lhs - rhs, - BinaryOperator::Mul => lhs * rhs, - BinaryOperator::Div => lhs / rhs, - BinaryOperator::Pow => todo!(), - BinaryOperator::Equ => Ok(lhs.eq(&rhs).into()), - BinaryOperator::Neq => todo!(), - } - } - Expr::Let { bindings, body, .. } => { - self.env.push(); - for Binding { pat, body, .. } in bindings { - let val = self.eval(body)?; - self.bind_pattern(pat, val); - } - let res = self.eval(body)?; - self.env.pop(); - Ok(res) - } - Expr::If { - condition, - then, - else_, - .. - } => { - let condition = self.eval(condition)?; - if *(condition.as_type::<bool>()?) { - self.eval(then) - } else { - self.eval(else_) - } - } - Expr::Call { ref fun, args, .. } => { - let fun = self.eval(fun)?; - let expected_type = FunctionType { - args: args.iter().map(|_| Type::Int).collect(), - ret: Box::new(Type::Int), - }; - - let Function { - args: function_args, - body, - .. - } = fun.as_function(expected_type)?; - let arg_values = function_args.iter().zip( - args.iter() - .map(|v| self.eval(v)) - .collect::<Result<Vec<_>>>()?, - ); - let mut interpreter = Interpreter::new(); - for (arg_name, arg_value) in arg_values { - interpreter.env.set(arg_name, arg_value); - } - Ok(Value::from(*interpreter.eval(body)?.as_type::<i64>()?)) - } - Expr::Fun { - type_args: _, - args, - body, - type_, - } => { - let type_ = match type_ { - Type::Function(ft) => ft.clone(), - _ => unreachable!("Function expression without function type"), - }; - - Ok(Value::from(value::Function { - // TODO - type_, - args: args.iter().map(|(arg, _)| arg.to_owned()).collect(), - body: (**body).to_owned(), - })) - } - Expr::Tuple(members, _) => Ok(Val::Tuple( - members - .into_iter() - .map(|expr| self.eval(expr)) - .try_collect()?, - ) - .into()), - }?; - debug_assert_eq!(&res.type_(), expr.type_()); - Ok(res) - } -} - -pub fn eval<'a>(expr: &'a Expr<'a, Type>) -> Result<Value<'a>> { - let mut interpreter = Interpreter::new(); - interpreter.eval(expr) -} - -#[cfg(test)] -mod tests { - use std::convert::TryFrom; - - use super::value::{TypeOf, Val}; - use super::*; - use BinaryOperator::*; - - fn int_lit(i: u64) -> Box<Expr<'static, Type<'static>>> { - Box::new(Expr::Literal(Literal::Int(i), Type::Int)) - } - - fn do_eval<T>(src: &str) -> T - where - for<'a> &'a T: TryFrom<&'a Val<'a>>, - T: Clone + TypeOf, - { - let expr = crate::parser::expr(src).unwrap().1; - let hir = crate::tc::typecheck_expr(expr).unwrap(); - let res = eval(&hir).unwrap(); - res.as_type::<T>().unwrap().clone() - } - - #[test] - fn simple_addition() { - let expr = Expr::BinaryOp { - lhs: int_lit(1), - op: Mul, - rhs: int_lit(2), - type_: Type::Int, - }; - let res = eval(&expr).unwrap(); - assert_eq!(*res.as_type::<i64>().unwrap(), 2); - } - - #[test] - fn variable_shadowing() { - let res = do_eval::<i64>("let x = 1 in (let x = 2 in x) + x"); - assert_eq!(res, 3); - } - - #[test] - fn conditional_with_equals() { - let res = do_eval::<i64>("let x = 1 in if x == 1 then 2 else 4"); - assert_eq!(res, 2); - } - - #[test] - #[ignore] - fn function_call() { - let res = do_eval::<i64>("let id = fn x = x in id 1"); - assert_eq!(res, 1); - } -} diff --git a/users/grfn/achilles/src/interpreter/value.rs b/users/grfn/achilles/src/interpreter/value.rs deleted file mode 100644 index 272d1167a3..0000000000 --- a/users/grfn/achilles/src/interpreter/value.rs +++ /dev/null @@ -1,224 +0,0 @@ -use std::borrow::Cow; -use std::convert::TryFrom; -use std::fmt::{self, Display}; -use std::ops::{Add, Div, Mul, Neg, Sub}; -use std::rc::Rc; -use std::result; - -use derive_more::{Deref, From, TryInto}; -use itertools::Itertools; - -use super::{Error, Result}; -use crate::ast::hir::Expr; -use crate::ast::{FunctionType, Ident, Type}; - -#[derive(Debug, Clone)] -pub struct Function<'a> { - pub type_: FunctionType<'a>, - pub args: Vec<Ident<'a>>, - pub body: Expr<'a, Type<'a>>, -} - -#[derive(From, TryInto)] -#[try_into(owned, ref)] -pub enum Val<'a> { - Int(i64), - Float(f64), - Bool(bool), - String(Cow<'a, str>), - Tuple(Vec<Value<'a>>), - Function(Function<'a>), -} - -impl<'a> TryFrom<Val<'a>> for String { - type Error = (); - - fn try_from(value: Val<'a>) -> result::Result<Self, Self::Error> { - match value { - Val::String(s) => Ok(s.into_owned()), - _ => Err(()), - } - } -} - -impl<'a> fmt::Debug for Val<'a> { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - Val::Int(x) => f.debug_tuple("Int").field(x).finish(), - Val::Float(x) => f.debug_tuple("Float").field(x).finish(), - Val::Bool(x) => f.debug_tuple("Bool").field(x).finish(), - Val::String(s) => f.debug_tuple("String").field(s).finish(), - Val::Function(Function { type_, .. }) => { - f.debug_struct("Function").field("type_", type_).finish() - } - Val::Tuple(members) => f.debug_tuple("Tuple").field(members).finish(), - } - } -} - -impl<'a> PartialEq for Val<'a> { - fn eq(&self, other: &Self) -> bool { - match (self, other) { - (Val::Int(x), Val::Int(y)) => x == y, - (Val::Float(x), Val::Float(y)) => x == y, - (Val::Bool(x), Val::Bool(y)) => x == y, - (Val::Function(_), Val::Function(_)) => false, - (_, _) => false, - } - } -} - -impl<'a> From<u64> for Val<'a> { - fn from(i: u64) -> Self { - Self::from(i as i64) - } -} - -impl<'a> Display for Val<'a> { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - Val::Int(x) => x.fmt(f), - Val::Float(x) => x.fmt(f), - Val::Bool(x) => x.fmt(f), - Val::String(s) => write!(f, "{:?}", s), - Val::Function(Function { type_, .. }) => write!(f, "<{}>", type_), - Val::Tuple(members) => write!(f, "({})", members.iter().join(", ")), - } - } -} - -impl<'a> Val<'a> { - pub fn type_(&self) -> Type { - match self { - Val::Int(_) => Type::Int, - Val::Float(_) => Type::Float, - Val::Bool(_) => Type::Bool, - Val::String(_) => Type::CString, - Val::Function(Function { type_, .. }) => Type::Function(type_.clone()), - Val::Tuple(members) => Type::Tuple(members.iter().map(|expr| expr.type_()).collect()), - } - } - - pub fn as_type<'b, T>(&'b self) -> Result<&'b T> - where - T: TypeOf + 'b + Clone, - &'b T: TryFrom<&'b Self>, - { - <&T>::try_from(self).map_err(|_| Error::InvalidType { - actual: self.type_().to_owned(), - expected: <T as TypeOf>::type_of(), - }) - } - - pub fn as_function<'b>(&'b self, function_type: FunctionType) -> Result<&'b Function<'a>> { - match self { - Val::Function(f) if f.type_ == function_type => Ok(&f), - _ => Err(Error::InvalidType { - actual: self.type_().to_owned(), - expected: Type::Function(function_type.to_owned()), - }), - } - } - - pub fn as_tuple(&self) -> Option<&Vec<Value<'a>>> { - if let Self::Tuple(v) = self { - Some(v) - } else { - None - } - } - - pub fn try_into_tuple(self) -> result::Result<Vec<Value<'a>>, Self> { - if let Self::Tuple(v) = self { - Ok(v) - } else { - Err(self) - } - } -} - -#[derive(Debug, PartialEq, Clone, Deref)] -pub struct Value<'a>(Rc<Val<'a>>); - -impl<'a> Display for Value<'a> { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - self.0.fmt(f) - } -} - -impl<'a, T> From<T> for Value<'a> -where - Val<'a>: From<T>, -{ - fn from(x: T) -> Self { - Self(Rc::new(x.into())) - } -} - -impl<'a> Neg for Value<'a> { - type Output = Result<Value<'a>>; - - fn neg(self) -> Self::Output { - Ok((-self.as_type::<i64>()?).into()) - } -} - -impl<'a> Add for Value<'a> { - type Output = Result<Value<'a>>; - - fn add(self, rhs: Self) -> Self::Output { - Ok((self.as_type::<i64>()? + rhs.as_type::<i64>()?).into()) - } -} - -impl<'a> Sub for Value<'a> { - type Output = Result<Value<'a>>; - - fn sub(self, rhs: Self) -> Self::Output { - Ok((self.as_type::<i64>()? - rhs.as_type::<i64>()?).into()) - } -} - -impl<'a> Mul for Value<'a> { - type Output = Result<Value<'a>>; - - fn mul(self, rhs: Self) -> Self::Output { - Ok((self.as_type::<i64>()? * rhs.as_type::<i64>()?).into()) - } -} - -impl<'a> Div for Value<'a> { - type Output = Result<Value<'a>>; - - fn div(self, rhs: Self) -> Self::Output { - Ok((self.as_type::<f64>()? / rhs.as_type::<f64>()?).into()) - } -} - -pub trait TypeOf { - fn type_of() -> Type<'static>; -} - -impl TypeOf for i64 { - fn type_of() -> Type<'static> { - Type::Int - } -} - -impl TypeOf for bool { - fn type_of() -> Type<'static> { - Type::Bool - } -} - -impl TypeOf for f64 { - fn type_of() -> Type<'static> { - Type::Float - } -} - -impl TypeOf for String { - fn type_of() -> Type<'static> { - Type::CString - } -} diff --git a/users/grfn/achilles/src/main.rs b/users/grfn/achilles/src/main.rs deleted file mode 100644 index 5ae1b59b3a..0000000000 --- a/users/grfn/achilles/src/main.rs +++ /dev/null @@ -1,36 +0,0 @@ -use clap::Clap; - -pub mod ast; -pub mod codegen; -pub(crate) mod commands; -pub(crate) mod common; -pub mod compiler; -pub mod interpreter; -pub(crate) mod passes; -#[macro_use] -pub mod parser; -pub mod tc; - -pub use common::{Error, Result}; - -#[derive(Clap)] -struct Opts { - #[clap(subcommand)] - subcommand: Command, -} - -#[derive(Clap)] -enum Command { - Eval(commands::Eval), - Compile(commands::Compile), - Check(commands::Check), -} - -fn main() -> anyhow::Result<()> { - let opts = Opts::parse(); - match opts.subcommand { - Command::Eval(eval) => Ok(eval.run()?), - Command::Compile(compile) => Ok(compile.run()?), - Command::Check(check) => Ok(check.run()?), - } -} diff --git a/users/grfn/achilles/src/parser/expr.rs b/users/grfn/achilles/src/parser/expr.rs deleted file mode 100644 index f596b18970..0000000000 --- a/users/grfn/achilles/src/parser/expr.rs +++ /dev/null @@ -1,718 +0,0 @@ -use std::borrow::Cow; - -use nom::alt; -use nom::character::complete::{digit1, multispace0, multispace1}; -use nom::{ - call, char, complete, delimited, do_parse, flat_map, many0, map, named, opt, parse_to, - preceded, separated_list0, separated_list1, tag, tuple, -}; -use pratt::{Affix, Associativity, PrattParser, Precedence}; - -use super::util::comma; -use crate::ast::{BinaryOperator, Binding, Expr, Fun, Literal, Pattern, UnaryOperator}; -use crate::parser::{arg, ident, type_}; - -#[derive(Debug)] -enum TokenTree<'a> { - Prefix(UnaryOperator), - // Postfix(char), - Infix(BinaryOperator), - Primary(Expr<'a>), - Group(Vec<TokenTree<'a>>), -} - -named!(prefix(&str) -> TokenTree, map!(alt!( - complete!(char!('-')) => { |_| UnaryOperator::Neg } | - complete!(char!('!')) => { |_| UnaryOperator::Not } -), TokenTree::Prefix)); - -named!(infix(&str) -> TokenTree, map!(alt!( - complete!(tag!("==")) => { |_| BinaryOperator::Equ } | - complete!(tag!("!=")) => { |_| BinaryOperator::Neq } | - complete!(char!('+')) => { |_| BinaryOperator::Add } | - complete!(char!('-')) => { |_| BinaryOperator::Sub } | - complete!(char!('*')) => { |_| BinaryOperator::Mul } | - complete!(char!('/')) => { |_| BinaryOperator::Div } | - complete!(char!('^')) => { |_| BinaryOperator::Pow } -), TokenTree::Infix)); - -named!(primary(&str) -> TokenTree, alt!( - do_parse!( - multispace0 >> - char!('(') >> - multispace0 >> - group: group >> - multispace0 >> - char!(')') >> - multispace0 >> - (TokenTree::Group(group)) - ) | - delimited!(multispace0, simple_expr, multispace0) => { |s| TokenTree::Primary(s) } -)); - -named!( - rest(&str) -> Vec<(TokenTree, Vec<TokenTree>, TokenTree)>, - many0!(tuple!( - infix, - delimited!(multispace0, many0!(prefix), multispace0), - primary - // many0!(postfix) - )) -); - -named!(group(&str) -> Vec<TokenTree>, do_parse!( - prefix: many0!(prefix) - >> primary: primary - // >> postfix: many0!(postfix) - >> rest: rest - >> ({ - let mut res = prefix; - res.push(primary); - // res.append(&mut postfix); - for (infix, mut prefix, primary/*, mut postfix*/) in rest { - res.push(infix); - res.append(&mut prefix); - res.push(primary); - // res.append(&mut postfix); - } - res - }) -)); - -fn token_tree(i: &str) -> nom::IResult<&str, Vec<TokenTree>> { - group(i) -} - -struct ExprParser; - -impl<'a, I> PrattParser<I> for ExprParser -where - I: Iterator<Item = TokenTree<'a>>, -{ - type Error = pratt::NoError; - type Input = TokenTree<'a>; - type Output = Expr<'a>; - - fn query(&mut self, input: &Self::Input) -> Result<Affix, Self::Error> { - use BinaryOperator::*; - use UnaryOperator::*; - - Ok(match input { - TokenTree::Infix(Add) => Affix::Infix(Precedence(6), Associativity::Left), - TokenTree::Infix(Sub) => Affix::Infix(Precedence(6), Associativity::Left), - TokenTree::Infix(Mul) => Affix::Infix(Precedence(7), Associativity::Left), - TokenTree::Infix(Div) => Affix::Infix(Precedence(7), Associativity::Left), - TokenTree::Infix(Pow) => Affix::Infix(Precedence(8), Associativity::Right), - TokenTree::Infix(Equ) => Affix::Infix(Precedence(4), Associativity::Right), - TokenTree::Infix(Neq) => Affix::Infix(Precedence(4), Associativity::Right), - TokenTree::Prefix(Neg) => Affix::Prefix(Precedence(6)), - TokenTree::Prefix(Not) => Affix::Prefix(Precedence(6)), - TokenTree::Primary(_) => Affix::Nilfix, - TokenTree::Group(_) => Affix::Nilfix, - }) - } - - fn primary(&mut self, input: Self::Input) -> Result<Self::Output, Self::Error> { - Ok(match input { - TokenTree::Primary(expr) => expr, - TokenTree::Group(group) => self.parse(&mut group.into_iter()).unwrap(), - _ => unreachable!(), - }) - } - - fn infix( - &mut self, - lhs: Self::Output, - op: Self::Input, - rhs: Self::Output, - ) -> Result<Self::Output, Self::Error> { - let op = match op { - TokenTree::Infix(op) => op, - _ => unreachable!(), - }; - Ok(Expr::BinaryOp { - lhs: Box::new(lhs), - op, - rhs: Box::new(rhs), - }) - } - - fn prefix(&mut self, op: Self::Input, rhs: Self::Output) -> Result<Self::Output, Self::Error> { - let op = match op { - TokenTree::Prefix(op) => op, - _ => unreachable!(), - }; - - Ok(Expr::UnaryOp { - op, - rhs: Box::new(rhs), - }) - } - - fn postfix( - &mut self, - _lhs: Self::Output, - _op: Self::Input, - ) -> Result<Self::Output, Self::Error> { - unreachable!() - } -} - -named!(int(&str) -> Literal, map!(flat_map!(digit1, parse_to!(u64)), Literal::Int)); - -named!(bool_(&str) -> Literal, alt!( - complete!(tag!("true")) => { |_| Literal::Bool(true) } | - complete!(tag!("false")) => { |_| Literal::Bool(false) } -)); - -fn string_internal(i: &str) -> nom::IResult<&str, Cow<'_, str>, nom::error::Error<&str>> { - // TODO(grfn): use String::split_once when that's stable - let (s, rem) = if let Some(pos) = i.find('"') { - (&i[..pos], &i[(pos + 1)..]) - } else { - return Err(nom::Err::Error(nom::error::Error::new( - i, - nom::error::ErrorKind::Tag, - ))); - }; - - Ok((rem, Cow::Borrowed(s))) -} - -named!(string(&str) -> Literal, preceded!( - complete!(char!('"')), - map!( - string_internal, - |s| Literal::String(s) - ) -)); - -named!(unit(&str) -> Literal, map!(complete!(tag!("()")), |_| Literal::Unit)); - -named!(literal(&str) -> Literal, alt!(int | bool_ | string | unit)); - -named!(literal_expr(&str) -> Expr, map!(literal, Expr::Literal)); - -named!(tuple(&str) -> Expr, do_parse!( - complete!(tag!("(")) - >> multispace0 - >> fst: expr - >> comma - >> rest: separated_list0!( - comma, - expr - ) - >> multispace0 - >> tag!(")") - >> ({ - let mut members = Vec::with_capacity(rest.len() + 1); - members.push(fst); - members.append(&mut rest.clone()); - Expr::Tuple(members) - }) -)); - -named!(tuple_pattern(&str) -> Pattern, do_parse!( - complete!(tag!("(")) - >> multispace0 - >> pats: separated_list0!( - comma, - pattern - ) - >> multispace0 - >> tag!(")") - >> (Pattern::Tuple(pats)) -)); - -named!(pattern(&str) -> Pattern, alt!( - ident => { |id| Pattern::Id(id) } | - tuple_pattern -)); - -named!(binding(&str) -> Binding, do_parse!( - multispace0 - >> pat: pattern - >> multispace0 - >> type_: opt!(preceded!(tuple!(tag!(":"), multispace0), type_)) - >> multispace0 - >> char!('=') - >> multispace0 - >> body: expr - >> (Binding { - pat, - type_, - body - }) -)); - -named!(let_(&str) -> Expr, do_parse!( - tag!("let") - >> multispace0 - >> bindings: separated_list1!(alt!(char!(';') | char!('\n')), binding) - >> multispace0 - >> tag!("in") - >> multispace0 - >> body: expr - >> (Expr::Let { - bindings, - body: Box::new(body) - }) -)); - -named!(if_(&str) -> Expr, do_parse! ( - tag!("if") - >> multispace0 - >> condition: expr - >> multispace0 - >> tag!("then") - >> multispace0 - >> then: expr - >> multispace0 - >> tag!("else") - >> multispace0 - >> else_: expr - >> (Expr::If { - condition: Box::new(condition), - then: Box::new(then), - else_: Box::new(else_) - }) -)); - -named!(ident_expr(&str) -> Expr, map!(ident, Expr::Ident)); - -fn ascripted<'a>( - p: impl Fn(&'a str) -> nom::IResult<&'a str, Expr, nom::error::Error<&'a str>> + 'a, -) -> impl Fn(&'a str) -> nom::IResult<&str, Expr, nom::error::Error<&'a str>> { - move |i| { - do_parse!( - i, - expr: p - >> multispace0 - >> complete!(tag!(":")) - >> multispace0 - >> type_: type_ - >> (Expr::Ascription { - expr: Box::new(expr), - type_ - }) - ) - } -} - -named!(paren_expr(&str) -> Expr, - delimited!(complete!(tag!("(")), expr, complete!(tag!(")")))); - -named!(funcref(&str) -> Expr, alt!( - ident_expr | - tuple | - paren_expr -)); - -named!(no_arg_call(&str) -> Expr, do_parse!( - fun: funcref - >> complete!(tag!("()")) - >> (Expr::Call { - fun: Box::new(fun), - args: vec![], - }) -)); - -named!(fun_expr(&str) -> Expr, do_parse!( - tag!("fn") - >> multispace1 - >> args: separated_list0!(multispace1, arg) - >> multispace0 - >> char!('=') - >> multispace0 - >> body: expr - >> (Expr::Fun(Box::new(Fun { - args, - body - }))) -)); - -named!(fn_arg(&str) -> Expr, alt!( - ident_expr | - literal_expr | - tuple | - paren_expr -)); - -named!(call_with_args(&str) -> Expr, do_parse!( - fun: funcref - >> multispace1 - >> args: separated_list1!(multispace1, fn_arg) - >> (Expr::Call { - fun: Box::new(fun), - args - }) -)); - -named!(simple_expr_unascripted(&str) -> Expr, alt!( - let_ | - if_ | - fun_expr | - literal_expr | - ident_expr | - tuple -)); - -named!(simple_expr(&str) -> Expr, alt!( - call!(ascripted(simple_expr_unascripted)) | - simple_expr_unascripted -)); - -named!(pub expr(&str) -> Expr, alt!( - no_arg_call | - call_with_args | - map!(token_tree, |tt| { - ExprParser.parse(&mut tt.into_iter()).unwrap() - }) | - simple_expr -)); - -#[cfg(test)] -pub(crate) mod tests { - use super::*; - use crate::ast::{Arg, Ident, Pattern, Type}; - use std::convert::TryFrom; - use BinaryOperator::*; - use Expr::{BinaryOp, If, Let, UnaryOp}; - use UnaryOperator::*; - - pub(crate) fn ident_expr(s: &str) -> Box<Expr> { - Box::new(Expr::Ident(Ident::try_from(s).unwrap())) - } - - mod operators { - use super::*; - - #[test] - fn mul_plus() { - let (rem, res) = expr("x*y+z").unwrap(); - assert!(rem.is_empty()); - assert_eq!( - res, - BinaryOp { - lhs: Box::new(BinaryOp { - lhs: ident_expr("x"), - op: Mul, - rhs: ident_expr("y") - }), - op: Add, - rhs: ident_expr("z") - } - ) - } - - #[test] - fn mul_plus_ws() { - let (rem, res) = expr("x * y + z").unwrap(); - assert!(rem.is_empty(), "non-empty remainder: \"{}\"", rem); - assert_eq!( - res, - BinaryOp { - lhs: Box::new(BinaryOp { - lhs: ident_expr("x"), - op: Mul, - rhs: ident_expr("y") - }), - op: Add, - rhs: ident_expr("z") - } - ) - } - - #[test] - fn unary() { - let (rem, res) = expr("x * -z").unwrap(); - assert!(rem.is_empty(), "non-empty remainder: \"{}\"", rem); - assert_eq!( - res, - BinaryOp { - lhs: ident_expr("x"), - op: Mul, - rhs: Box::new(UnaryOp { - op: Neg, - rhs: ident_expr("z"), - }) - } - ) - } - - #[test] - fn mul_literal() { - let (rem, res) = expr("x * 3").unwrap(); - assert!(rem.is_empty()); - assert_eq!( - res, - BinaryOp { - lhs: ident_expr("x"), - op: Mul, - rhs: Box::new(Expr::Literal(Literal::Int(3))), - } - ) - } - - #[test] - fn equ() { - let res = test_parse!(expr, "x * 7 == 7"); - assert_eq!( - res, - BinaryOp { - lhs: Box::new(BinaryOp { - lhs: ident_expr("x"), - op: Mul, - rhs: Box::new(Expr::Literal(Literal::Int(7))) - }), - op: Equ, - rhs: Box::new(Expr::Literal(Literal::Int(7))) - } - ) - } - } - - #[test] - fn unit() { - assert_eq!(test_parse!(expr, "()"), Expr::Literal(Literal::Unit)); - } - - #[test] - fn bools() { - assert_eq!( - test_parse!(expr, "true"), - Expr::Literal(Literal::Bool(true)) - ); - assert_eq!( - test_parse!(expr, "false"), - Expr::Literal(Literal::Bool(false)) - ); - } - - #[test] - fn tuple() { - assert_eq!( - test_parse!(expr, "(1, \"seven\")"), - Expr::Tuple(vec![ - Expr::Literal(Literal::Int(1)), - Expr::Literal(Literal::String(Cow::Borrowed("seven"))) - ]) - ) - } - - #[test] - fn simple_string_lit() { - assert_eq!( - test_parse!(expr, "\"foobar\""), - Expr::Literal(Literal::String(Cow::Borrowed("foobar"))) - ) - } - - #[test] - fn let_complex() { - let res = test_parse!(expr, "let x = 1; y = x * 7 in (x + y) * 4"); - assert_eq!( - res, - Let { - bindings: vec![ - Binding { - pat: Pattern::Id(Ident::try_from("x").unwrap()), - type_: None, - body: Expr::Literal(Literal::Int(1)) - }, - Binding { - pat: Pattern::Id(Ident::try_from("y").unwrap()), - type_: None, - body: Expr::BinaryOp { - lhs: ident_expr("x"), - op: Mul, - rhs: Box::new(Expr::Literal(Literal::Int(7))) - } - } - ], - body: Box::new(Expr::BinaryOp { - lhs: Box::new(Expr::BinaryOp { - lhs: ident_expr("x"), - op: Add, - rhs: ident_expr("y"), - }), - op: Mul, - rhs: Box::new(Expr::Literal(Literal::Int(4))), - }) - } - ) - } - - #[test] - fn if_simple() { - let res = test_parse!(expr, "if x == 8 then 9 else 20"); - assert_eq!( - res, - If { - condition: Box::new(BinaryOp { - lhs: ident_expr("x"), - op: Equ, - rhs: Box::new(Expr::Literal(Literal::Int(8))), - }), - then: Box::new(Expr::Literal(Literal::Int(9))), - else_: Box::new(Expr::Literal(Literal::Int(20))) - } - ) - } - - #[test] - fn no_arg_call() { - let res = test_parse!(expr, "f()"); - assert_eq!( - res, - Expr::Call { - fun: ident_expr("f"), - args: vec![] - } - ); - } - - #[test] - fn unit_call() { - let res = test_parse!(expr, "f ()"); - assert_eq!( - res, - Expr::Call { - fun: ident_expr("f"), - args: vec![Expr::Literal(Literal::Unit)] - } - ) - } - - #[test] - fn call_with_args() { - let res = test_parse!(expr, "f x 1"); - assert_eq!( - res, - Expr::Call { - fun: ident_expr("f"), - args: vec![*ident_expr("x"), Expr::Literal(Literal::Int(1))] - } - ) - } - - #[test] - fn call_funcref() { - let res = test_parse!(expr, "(let x = 1 in x) 2"); - assert_eq!( - res, - Expr::Call { - fun: Box::new(Expr::Let { - bindings: vec![Binding { - pat: Pattern::Id(Ident::try_from("x").unwrap()), - type_: None, - body: Expr::Literal(Literal::Int(1)) - }], - body: ident_expr("x") - }), - args: vec![Expr::Literal(Literal::Int(2))] - } - ) - } - - #[test] - fn anon_function() { - let res = test_parse!(expr, "let id = fn x = x in id 1"); - assert_eq!( - res, - Expr::Let { - bindings: vec![Binding { - pat: Pattern::Id(Ident::try_from("id").unwrap()), - type_: None, - body: Expr::Fun(Box::new(Fun { - args: vec![Arg::try_from("x").unwrap()], - body: *ident_expr("x") - })) - }], - body: Box::new(Expr::Call { - fun: ident_expr("id"), - args: vec![Expr::Literal(Literal::Int(1))], - }) - } - ); - } - - #[test] - fn tuple_binding() { - let res = test_parse!(expr, "let (x, y) = (1, 2) in x"); - assert_eq!( - res, - Expr::Let { - bindings: vec![Binding { - pat: Pattern::Tuple(vec![ - Pattern::Id(Ident::from_str_unchecked("x")), - Pattern::Id(Ident::from_str_unchecked("y")) - ]), - body: Expr::Tuple(vec![ - Expr::Literal(Literal::Int(1)), - Expr::Literal(Literal::Int(2)) - ]), - type_: None - }], - body: Box::new(Expr::Ident(Ident::from_str_unchecked("x"))) - } - ) - } - - mod ascriptions { - use super::*; - - #[test] - fn bare_ascription() { - let res = test_parse!(expr, "1: float"); - assert_eq!( - res, - Expr::Ascription { - expr: Box::new(Expr::Literal(Literal::Int(1))), - type_: Type::Float - } - ) - } - - #[test] - fn fn_body_ascription() { - let res = test_parse!(expr, "let const_1 = fn x = 1: int in const_1 2"); - assert_eq!( - res, - Expr::Let { - bindings: vec![Binding { - pat: Pattern::Id(Ident::try_from("const_1").unwrap()), - type_: None, - body: Expr::Fun(Box::new(Fun { - args: vec![Arg::try_from("x").unwrap()], - body: Expr::Ascription { - expr: Box::new(Expr::Literal(Literal::Int(1))), - type_: Type::Int, - } - })) - }], - body: Box::new(Expr::Call { - fun: ident_expr("const_1"), - args: vec![Expr::Literal(Literal::Int(2))] - }) - } - ) - } - - #[test] - fn let_binding_ascripted() { - let res = test_parse!(expr, "let x: int = 1 in x"); - assert_eq!( - res, - Expr::Let { - bindings: vec![Binding { - pat: Pattern::Id(Ident::try_from("x").unwrap()), - type_: Some(Type::Int), - body: Expr::Literal(Literal::Int(1)) - }], - body: ident_expr("x") - } - ) - } - } -} diff --git a/users/grfn/achilles/src/parser/macros.rs b/users/grfn/achilles/src/parser/macros.rs deleted file mode 100644 index 406e5c0e69..0000000000 --- a/users/grfn/achilles/src/parser/macros.rs +++ /dev/null @@ -1,16 +0,0 @@ -#[cfg(test)] -#[macro_use] -macro_rules! test_parse { - ($parser: ident, $src: expr) => {{ - let res = $parser($src); - nom_trace::print_trace!(); - let (rem, res) = res.unwrap(); - assert!( - rem.is_empty(), - "non-empty remainder: \"{}\", parsed: {:?}", - rem, - res - ); - res - }}; -} diff --git a/users/grfn/achilles/src/parser/mod.rs b/users/grfn/achilles/src/parser/mod.rs deleted file mode 100644 index e088cbca10..0000000000 --- a/users/grfn/achilles/src/parser/mod.rs +++ /dev/null @@ -1,240 +0,0 @@ -use nom::character::complete::{multispace0, multispace1}; -use nom::error::{ErrorKind, ParseError}; -use nom::{alt, char, complete, do_parse, eof, many0, named, separated_list0, tag, terminated}; - -#[macro_use] -pub(crate) mod macros; -mod expr; -mod type_; -mod util; - -use crate::ast::{Arg, Decl, Fun, Ident}; -pub use expr::expr; -use type_::function_type; -pub use type_::type_; - -pub type Error = nom::Err<nom::error::Error<String>>; - -pub(crate) fn is_reserved(s: &str) -> bool { - matches!( - s, - "if" | "then" - | "else" - | "let" - | "in" - | "fn" - | "ty" - | "int" - | "float" - | "bool" - | "true" - | "false" - | "cstring" - ) -} - -pub(crate) fn ident<'a, E>(i: &'a str) -> nom::IResult<&'a str, Ident, E> -where - E: ParseError<&'a str>, -{ - let mut chars = i.chars(); - if let Some(f) = chars.next() { - if f.is_alphabetic() || f == '_' { - let mut idx = 1; - for c in chars { - if !(c.is_alphanumeric() || c == '_') { - break; - } - idx += 1; - } - let id = &i[..idx]; - if is_reserved(id) { - Err(nom::Err::Error(E::from_error_kind(i, ErrorKind::Satisfy))) - } else { - Ok((&i[idx..], Ident::from_str_unchecked(id))) - } - } else { - Err(nom::Err::Error(E::from_error_kind(i, ErrorKind::Satisfy))) - } - } else { - Err(nom::Err::Error(E::from_error_kind(i, ErrorKind::Eof))) - } -} - -named!(ascripted_arg(&str) -> Arg, do_parse!( - complete!(char!('(')) >> - multispace0 >> - ident: ident >> - multispace0 >> - complete!(char!(':')) >> - multispace0 >> - type_: type_ >> - multispace0 >> - complete!(char!(')')) >> - (Arg { - ident, - type_: Some(type_) - }) -)); - -named!(arg(&str) -> Arg, alt!( - ident => { |ident| Arg {ident, type_: None}} | - ascripted_arg -)); - -named!(extern_decl(&str) -> Decl, do_parse!( - complete!(tag!("extern")) - >> multispace1 - >> name: ident - >> multispace0 - >> char!(':') - >> multispace0 - >> type_: function_type - >> multispace0 - >> (Decl::Extern { - name, - type_ - }) -)); - -named!(fun_decl(&str) -> Decl, do_parse!( - complete!(tag!("fn")) - >> multispace1 - >> name: ident - >> multispace1 - >> args: separated_list0!(multispace1, arg) - >> multispace0 - >> char!('=') - >> multispace0 - >> body: expr - >> (Decl::Fun { - name, - body: Fun { - args, - body - } - }) -)); - -named!(ascription_decl(&str) -> Decl, do_parse!( - complete!(tag!("ty")) - >> multispace1 - >> name: ident - >> multispace0 - >> complete!(char!(':')) - >> multispace0 - >> type_: type_ - >> multispace0 - >> (Decl::Ascription { - name, - type_ - }) -)); - -named!(pub decl(&str) -> Decl, alt!( - ascription_decl | - fun_decl | - extern_decl -)); - -named!(pub toplevel(&str) -> Vec<Decl>, do_parse!( - decls: many0!(decl) - >> multispace0 - >> eof!() - >> (decls))); - -#[cfg(test)] -mod tests { - use std::convert::TryInto; - - use crate::ast::{BinaryOperator, Expr, FunctionType, Literal, Type}; - - use super::*; - use expr::tests::ident_expr; - - #[test] - fn fn_decl() { - let res = test_parse!(decl, "fn id x = x"); - assert_eq!( - res, - Decl::Fun { - name: "id".try_into().unwrap(), - body: Fun { - args: vec!["x".try_into().unwrap()], - body: *ident_expr("x"), - } - } - ) - } - - #[test] - fn ascripted_fn_args() { - test_parse!(ascripted_arg, "(x : int)"); - let res = test_parse!(decl, "fn plus1 (x : int) = x + 1"); - assert_eq!( - res, - Decl::Fun { - name: "plus1".try_into().unwrap(), - body: Fun { - args: vec![Arg { - ident: "x".try_into().unwrap(), - type_: Some(Type::Int), - }], - body: Expr::BinaryOp { - lhs: ident_expr("x"), - op: BinaryOperator::Add, - rhs: Box::new(Expr::Literal(Literal::Int(1))), - } - } - } - ); - } - - #[test] - fn multiple_decls() { - let res = test_parse!( - toplevel, - "fn id x = x - fn plus x y = x + y - fn main = plus (id 2) 7" - ); - assert_eq!(res.len(), 3); - let res = test_parse!( - toplevel, - "fn id x = x\nfn plus x y = x + y\nfn main = plus (id 2) 7\n" - ); - assert_eq!(res.len(), 3); - } - - #[test] - fn top_level_ascription() { - let res = test_parse!(toplevel, "ty id : fn a -> a"); - assert_eq!( - res, - vec![Decl::Ascription { - name: "id".try_into().unwrap(), - type_: Type::Function(FunctionType { - args: vec![Type::Var("a".try_into().unwrap())], - ret: Box::new(Type::Var("a".try_into().unwrap())) - }) - }] - ) - } - - #[test] - fn return_unit() { - assert_eq!( - test_parse!(decl, "fn g _ = ()"), - Decl::Fun { - name: "g".try_into().unwrap(), - body: Fun { - args: vec![Arg { - ident: "_".try_into().unwrap(), - type_: None, - }], - body: Expr::Literal(Literal::Unit), - }, - } - ) - } -} diff --git a/users/grfn/achilles/src/parser/type_.rs b/users/grfn/achilles/src/parser/type_.rs deleted file mode 100644 index b80f0e0860..0000000000 --- a/users/grfn/achilles/src/parser/type_.rs +++ /dev/null @@ -1,152 +0,0 @@ -use nom::character::complete::{multispace0, multispace1}; -use nom::{alt, delimited, do_parse, map, named, opt, separated_list0, tag, terminated, tuple}; - -use super::ident; -use super::util::comma; -use crate::ast::{FunctionType, Type}; - -named!(pub function_type(&str) -> FunctionType, do_parse!( - tag!("fn") - >> multispace1 - >> args: map!(opt!(terminated!(separated_list0!( - comma, - type_ - ), multispace1)), |args| args.unwrap_or_default()) - >> tag!("->") - >> multispace1 - >> ret: type_ - >> (FunctionType { - args, - ret: Box::new(ret) - }) -)); - -named!(tuple_type(&str) -> Type, do_parse!( - tag!("(") - >> multispace0 - >> fst: type_ - >> comma - >> rest: separated_list0!( - comma, - type_ - ) - >> multispace0 - >> tag!(")") - >> ({ - let mut members = Vec::with_capacity(rest.len() + 1); - members.push(fst); - members.append(&mut rest.clone()); - Type::Tuple(members) - }) -)); - -named!(pub type_(&str) -> Type, alt!( - tag!("int") => { |_| Type::Int } | - tag!("float") => { |_| Type::Float } | - tag!("bool") => { |_| Type::Bool } | - tag!("cstring") => { |_| Type::CString } | - tag!("()") => { |_| Type::Unit } | - tuple_type | - function_type => { |ft| Type::Function(ft) }| - ident => { |id| Type::Var(id) } | - delimited!( - tuple!(tag!("("), multispace0), - type_, - tuple!(tag!(")"), multispace0) - ) -)); - -#[cfg(test)] -mod tests { - use std::convert::TryFrom; - - use super::*; - use crate::ast::Ident; - - #[test] - fn simple_types() { - assert_eq!(test_parse!(type_, "int"), Type::Int); - assert_eq!(test_parse!(type_, "float"), Type::Float); - assert_eq!(test_parse!(type_, "bool"), Type::Bool); - assert_eq!(test_parse!(type_, "cstring"), Type::CString); - assert_eq!(test_parse!(type_, "()"), Type::Unit); - } - - #[test] - fn no_arg_fn_type() { - assert_eq!( - test_parse!(type_, "fn -> int"), - Type::Function(FunctionType { - args: vec![], - ret: Box::new(Type::Int) - }) - ); - } - - #[test] - fn fn_type_with_args() { - assert_eq!( - test_parse!(type_, "fn int, bool -> int"), - Type::Function(FunctionType { - args: vec![Type::Int, Type::Bool], - ret: Box::new(Type::Int) - }) - ); - } - - #[test] - fn fn_taking_fn() { - assert_eq!( - test_parse!(type_, "fn fn int, bool -> bool, float -> float"), - Type::Function(FunctionType { - args: vec![ - Type::Function(FunctionType { - args: vec![Type::Int, Type::Bool], - ret: Box::new(Type::Bool) - }), - Type::Float - ], - ret: Box::new(Type::Float) - }) - ) - } - - #[test] - fn parenthesized() { - assert_eq!( - test_parse!(type_, "fn (fn int, bool -> bool), float -> float"), - Type::Function(FunctionType { - args: vec![ - Type::Function(FunctionType { - args: vec![Type::Int, Type::Bool], - ret: Box::new(Type::Bool) - }), - Type::Float - ], - ret: Box::new(Type::Float) - }) - ) - } - - #[test] - fn tuple() { - assert_eq!( - test_parse!(type_, "(int, int)"), - Type::Tuple(vec![Type::Int, Type::Int]) - ) - } - - #[test] - fn type_vars() { - assert_eq!( - test_parse!(type_, "fn x, y -> x"), - Type::Function(FunctionType { - args: vec![ - Type::Var(Ident::try_from("x").unwrap()), - Type::Var(Ident::try_from("y").unwrap()), - ], - ret: Box::new(Type::Var(Ident::try_from("x").unwrap())), - }) - ) - } -} diff --git a/users/grfn/achilles/src/parser/util.rs b/users/grfn/achilles/src/parser/util.rs deleted file mode 100644 index bb53fb7fff..0000000000 --- a/users/grfn/achilles/src/parser/util.rs +++ /dev/null @@ -1,8 +0,0 @@ -use nom::character::complete::multispace0; -use nom::{complete, map, named, tag, tuple}; - -named!(pub(crate) comma(&str) -> (), map!(tuple!( - multispace0, - complete!(tag!(",")), - multispace0 -) ,|_| ())); diff --git a/users/grfn/achilles/src/passes/hir/mod.rs b/users/grfn/achilles/src/passes/hir/mod.rs deleted file mode 100644 index 872c449eb0..0000000000 --- a/users/grfn/achilles/src/passes/hir/mod.rs +++ /dev/null @@ -1,211 +0,0 @@ -use std::collections::HashMap; - -use crate::ast::hir::{Binding, Decl, Expr, Pattern}; -use crate::ast::{BinaryOperator, Ident, Literal, UnaryOperator}; - -pub(crate) mod monomorphize; -pub(crate) mod strip_positive_units; - -pub(crate) trait Visitor<'a, 'ast, T: 'ast>: Sized + 'a { - type Error; - - fn visit_type(&mut self, _type: &mut T) -> Result<(), Self::Error> { - Ok(()) - } - - fn visit_ident(&mut self, _ident: &mut Ident<'ast>) -> Result<(), Self::Error> { - Ok(()) - } - - fn visit_literal(&mut self, _literal: &mut Literal<'ast>) -> Result<(), Self::Error> { - Ok(()) - } - - fn visit_unary_operator(&mut self, _op: &mut UnaryOperator) -> Result<(), Self::Error> { - Ok(()) - } - - fn visit_binary_operator(&mut self, _op: &mut BinaryOperator) -> Result<(), Self::Error> { - Ok(()) - } - - fn visit_pattern(&mut self, _pat: &mut Pattern<'ast, T>) -> Result<(), Self::Error> { - Ok(()) - } - - fn visit_binding(&mut self, binding: &mut Binding<'ast, T>) -> Result<(), Self::Error> { - self.visit_pattern(&mut binding.pat)?; - self.visit_expr(&mut binding.body)?; - Ok(()) - } - - fn post_visit_call( - &mut self, - _fun: &mut Expr<'ast, T>, - _type_args: &mut HashMap<Ident<'ast>, T>, - _args: &mut Vec<Expr<'ast, T>>, - ) -> Result<(), Self::Error> { - Ok(()) - } - - fn pre_visit_call( - &mut self, - _fun: &mut Expr<'ast, T>, - _type_args: &mut HashMap<Ident<'ast>, T>, - _args: &mut Vec<Expr<'ast, T>>, - ) -> Result<(), Self::Error> { - Ok(()) - } - - fn visit_tuple(&mut self, members: &mut Vec<Expr<'ast, T>>) -> Result<(), Self::Error> { - for expr in members { - self.visit_expr(expr)?; - } - Ok(()) - } - - fn pre_visit_expr(&mut self, _expr: &mut Expr<'ast, T>) -> Result<(), Self::Error> { - Ok(()) - } - - fn visit_expr(&mut self, expr: &mut Expr<'ast, T>) -> Result<(), Self::Error> { - self.pre_visit_expr(expr)?; - match expr { - Expr::Ident(id, t) => { - self.visit_ident(id)?; - self.visit_type(t)?; - } - Expr::Literal(lit, t) => { - self.visit_literal(lit)?; - self.visit_type(t)?; - } - Expr::UnaryOp { op, rhs, type_ } => { - self.visit_unary_operator(op)?; - self.visit_expr(rhs)?; - self.visit_type(type_)?; - } - Expr::BinaryOp { - lhs, - op, - rhs, - type_, - } => { - self.visit_expr(lhs)?; - self.visit_binary_operator(op)?; - self.visit_expr(rhs)?; - self.visit_type(type_)?; - } - Expr::Let { - bindings, - body, - type_, - } => { - for binding in bindings.iter_mut() { - self.visit_binding(binding)?; - } - self.visit_expr(body)?; - self.visit_type(type_)?; - } - Expr::If { - condition, - then, - else_, - type_, - } => { - self.visit_expr(condition)?; - self.visit_expr(then)?; - self.visit_expr(else_)?; - self.visit_type(type_)?; - } - Expr::Fun { - args, - body, - type_args, - type_, - } => { - for (ident, t) in args { - self.visit_ident(ident)?; - self.visit_type(t)?; - } - for ta in type_args { - self.visit_ident(ta)?; - } - self.visit_expr(body)?; - self.visit_type(type_)?; - } - Expr::Call { - fun, - args, - type_args, - type_, - } => { - self.pre_visit_call(fun, type_args, args)?; - self.visit_expr(fun)?; - for arg in args.iter_mut() { - self.visit_expr(arg)?; - } - self.visit_type(type_)?; - self.post_visit_call(fun, type_args, args)?; - } - Expr::Tuple(tup, type_) => { - self.visit_tuple(tup)?; - self.visit_type(type_)?; - } - } - - Ok(()) - } - - fn post_visit_decl(&mut self, _decl: &'a Decl<'ast, T>) -> Result<(), Self::Error> { - Ok(()) - } - - fn post_visit_fun_decl( - &mut self, - _name: &mut Ident<'ast>, - _type_args: &mut Vec<Ident>, - _args: &mut Vec<(Ident, T)>, - _body: &mut Box<Expr<T>>, - _type_: &mut T, - ) -> Result<(), Self::Error> { - Ok(()) - } - - fn visit_decl(&mut self, decl: &'a mut Decl<'ast, T>) -> Result<(), Self::Error> { - match decl { - Decl::Fun { - name, - type_args, - args, - body, - type_, - } => { - self.visit_ident(name)?; - for type_arg in type_args.iter_mut() { - self.visit_ident(type_arg)?; - } - for (arg, t) in args.iter_mut() { - self.visit_ident(arg)?; - self.visit_type(t)?; - } - self.visit_expr(body)?; - self.visit_type(type_)?; - self.post_visit_fun_decl(name, type_args, args, body, type_)?; - } - Decl::Extern { - name, - arg_types, - ret_type, - } => { - self.visit_ident(name)?; - for arg_t in arg_types { - self.visit_type(arg_t)?; - } - self.visit_type(ret_type)?; - } - } - - self.post_visit_decl(decl)?; - Ok(()) - } -} diff --git a/users/grfn/achilles/src/passes/hir/monomorphize.rs b/users/grfn/achilles/src/passes/hir/monomorphize.rs deleted file mode 100644 index 251a988f4f..0000000000 --- a/users/grfn/achilles/src/passes/hir/monomorphize.rs +++ /dev/null @@ -1,139 +0,0 @@ -use std::cell::RefCell; -use std::collections::{HashMap, HashSet}; -use std::convert::TryInto; -use std::mem; - -use void::{ResultVoidExt, Void}; - -use crate::ast::hir::{Decl, Expr}; -use crate::ast::{self, Ident}; - -use super::Visitor; - -#[derive(Default)] -pub(crate) struct Monomorphize<'a, 'ast> { - decls: HashMap<&'a Ident<'ast>, &'a Decl<'ast, ast::Type<'ast>>>, - extra_decls: Vec<Decl<'ast, ast::Type<'ast>>>, - remove_decls: HashSet<Ident<'ast>>, -} - -impl<'a, 'ast> Monomorphize<'a, 'ast> { - pub(crate) fn new() -> Self { - Default::default() - } -} - -impl<'a, 'ast> Visitor<'a, 'ast, ast::Type<'ast>> for Monomorphize<'a, 'ast> { - type Error = Void; - - fn post_visit_call( - &mut self, - fun: &mut Expr<'ast, ast::Type<'ast>>, - type_args: &mut HashMap<Ident<'ast>, ast::Type<'ast>>, - args: &mut Vec<Expr<'ast, ast::Type<'ast>>>, - ) -> Result<(), Self::Error> { - let new_fun = match fun { - Expr::Ident(id, _) => { - let decl: Decl<_> = (**self.decls.get(id).unwrap()).clone(); - let name = RefCell::new(id.to_string()); - let type_args = mem::take(type_args); - let mut monomorphized = decl - .traverse_type(|ty| -> Result<_, Void> { - Ok(ty.clone().traverse_type_vars(|v| { - let concrete = type_args.get(&v).unwrap(); - name.borrow_mut().push_str(&concrete.to_string()); - concrete.clone() - })) - }) - .void_unwrap(); - let name: Ident = name.into_inner().try_into().unwrap(); - if name != *id { - self.remove_decls.insert(id.clone()); - monomorphized.set_name(name.clone()); - let type_ = monomorphized.type_().unwrap().clone(); - self.extra_decls.push(monomorphized); - Some(Expr::Ident(name, type_)) - } else { - None - } - } - _ => todo!(), - }; - if let Some(new_fun) = new_fun { - *fun = new_fun; - } - Ok(()) - } - - fn post_visit_decl( - &mut self, - decl: &'a Decl<'ast, ast::Type<'ast>>, - ) -> Result<(), Self::Error> { - self.decls.insert(decl.name(), decl); - Ok(()) - } -} - -pub(crate) fn run_toplevel<'a>(toplevel: &mut Vec<Decl<'a, ast::Type<'a>>>) { - let mut pass = Monomorphize::new(); - for decl in toplevel.iter_mut() { - pass.visit_decl(decl).void_unwrap(); - } - let remove_decls = mem::take(&mut pass.remove_decls); - let mut extra_decls = mem::take(&mut pass.extra_decls); - toplevel.retain(|decl| !remove_decls.contains(decl.name())); - extra_decls.append(toplevel); - *toplevel = extra_decls; -} - -#[cfg(test)] -mod tests { - use std::convert::TryFrom; - - use super::*; - use crate::parser::toplevel; - use crate::tc::typecheck_toplevel; - - #[test] - fn call_id_decl() { - let (_, program) = toplevel( - "ty id : fn a -> a - fn id x = x - - ty main : fn -> int - fn main = id 0", - ) - .unwrap(); - let mut program = typecheck_toplevel(program).unwrap(); - run_toplevel(&mut program); - - let find_decl = |ident: &str| { - program.iter().find(|decl| { - matches!(decl, Decl::Fun {name, ..} if name == &Ident::try_from(ident).unwrap()) - }).unwrap() - }; - - let main = find_decl("main"); - let body = match main { - Decl::Fun { body, .. } => body, - _ => unreachable!(), - }; - - let expected_type = ast::Type::Function(ast::FunctionType { - args: vec![ast::Type::Int], - ret: Box::new(ast::Type::Int), - }); - - match &**body { - Expr::Call { fun, .. } => { - let fun = match &**fun { - Expr::Ident(fun, _) => fun, - _ => unreachable!(), - }; - let called_decl = find_decl(fun.into()); - assert_eq!(called_decl.type_().unwrap(), &expected_type); - } - _ => unreachable!(), - } - } -} diff --git a/users/grfn/achilles/src/passes/hir/strip_positive_units.rs b/users/grfn/achilles/src/passes/hir/strip_positive_units.rs deleted file mode 100644 index 85ee1cce48..0000000000 --- a/users/grfn/achilles/src/passes/hir/strip_positive_units.rs +++ /dev/null @@ -1,191 +0,0 @@ -use std::collections::HashMap; -use std::mem; - -use ast::hir::{Binding, Pattern}; -use ast::Literal; -use void::{ResultVoidExt, Void}; - -use crate::ast::hir::{Decl, Expr}; -use crate::ast::{self, Ident}; - -use super::Visitor; - -/// Strip all values with a unit type in positive (non-return) position -pub(crate) struct StripPositiveUnits {} - -impl<'a, 'ast> Visitor<'a, 'ast, ast::Type<'ast>> for StripPositiveUnits { - type Error = Void; - - fn pre_visit_expr( - &mut self, - expr: &mut Expr<'ast, ast::Type<'ast>>, - ) -> Result<(), Self::Error> { - let mut extracted = vec![]; - if let Expr::Call { args, .. } = expr { - // TODO(grfn): replace with drain_filter once it's stabilized - let mut i = 0; - while i != args.len() { - if args[i].type_() == &ast::Type::Unit { - let expr = args.remove(i); - if !matches!(expr, Expr::Literal(Literal::Unit, _)) { - extracted.push(expr) - }; - } else { - i += 1 - } - } - } - - if !extracted.is_empty() { - let body = mem::replace(expr, Expr::Literal(Literal::Unit, ast::Type::Unit)); - *expr = Expr::Let { - bindings: extracted - .into_iter() - .map(|expr| Binding { - pat: Pattern::Id( - Ident::from_str_unchecked("___discarded"), - expr.type_().clone(), - ), - body: expr, - }) - .collect(), - type_: body.type_().clone(), - body: Box::new(body), - }; - } - - Ok(()) - } - - fn post_visit_call( - &mut self, - _fun: &mut Expr<'ast, ast::Type<'ast>>, - _type_args: &mut HashMap<Ident<'ast>, ast::Type<'ast>>, - args: &mut Vec<Expr<'ast, ast::Type<'ast>>>, - ) -> Result<(), Self::Error> { - args.retain(|arg| arg.type_() != &ast::Type::Unit); - Ok(()) - } - - fn visit_type(&mut self, type_: &mut ast::Type<'ast>) -> Result<(), Self::Error> { - if let ast::Type::Function(ft) = type_ { - ft.args.retain(|a| a != &ast::Type::Unit); - } - Ok(()) - } - - fn post_visit_fun_decl( - &mut self, - _name: &mut Ident<'ast>, - _type_args: &mut Vec<Ident>, - args: &mut Vec<(Ident, ast::Type<'ast>)>, - _body: &mut Box<Expr<ast::Type<'ast>>>, - _type_: &mut ast::Type<'ast>, - ) -> Result<(), Self::Error> { - args.retain(|(_, ty)| ty != &ast::Type::Unit); - Ok(()) - } -} - -pub(crate) fn run_toplevel<'a>(toplevel: &mut Vec<Decl<'a, ast::Type<'a>>>) { - let mut pass = StripPositiveUnits {}; - for decl in toplevel.iter_mut() { - pass.visit_decl(decl).void_unwrap(); - } -} - -#[cfg(test)] -mod tests { - use super::*; - use crate::parser::toplevel; - use crate::tc::typecheck_toplevel; - use pretty_assertions::assert_eq; - - #[test] - fn unit_only_arg() { - let (_, program) = toplevel( - "ty f : fn () -> int - fn f _ = 1 - - ty main : fn -> int - fn main = f ()", - ) - .unwrap(); - - let (_, expected) = toplevel( - "ty f : fn -> int - fn f = 1 - - ty main : fn -> int - fn main = f()", - ) - .unwrap(); - let expected = typecheck_toplevel(expected).unwrap(); - - let mut program = typecheck_toplevel(program).unwrap(); - run_toplevel(&mut program); - - assert_eq!(program, expected); - } - - #[test] - fn unit_and_other_arg() { - let (_, program) = toplevel( - "ty f : fn (), int -> int - fn f _ x = x - - ty main : fn -> int - fn main = f () 1", - ) - .unwrap(); - - let (_, expected) = toplevel( - "ty f : fn int -> int - fn f x = x - - ty main : fn -> int - fn main = f 1", - ) - .unwrap(); - let expected = typecheck_toplevel(expected).unwrap(); - - let mut program = typecheck_toplevel(program).unwrap(); - run_toplevel(&mut program); - - assert_eq!(program, expected); - } - - #[test] - fn unit_expr_and_other_arg() { - let (_, program) = toplevel( - "ty f : fn (), int -> int - fn f _ x = x - - ty g : fn int -> () - fn g _ = () - - ty main : fn -> int - fn main = f (g 2) 1", - ) - .unwrap(); - - let (_, expected) = toplevel( - "ty f : fn int -> int - fn f x = x - - ty g : fn int -> () - fn g _ = () - - ty main : fn -> int - fn main = let ___discarded = g 2 in f 1", - ) - .unwrap(); - assert_eq!(expected.len(), 6); - let expected = typecheck_toplevel(expected).unwrap(); - - let mut program = typecheck_toplevel(program).unwrap(); - run_toplevel(&mut program); - - assert_eq!(program, expected); - } -} diff --git a/users/grfn/achilles/src/passes/mod.rs b/users/grfn/achilles/src/passes/mod.rs deleted file mode 100644 index 306869bef1..0000000000 --- a/users/grfn/achilles/src/passes/mod.rs +++ /dev/null @@ -1 +0,0 @@ -pub(crate) mod hir; diff --git a/users/grfn/achilles/src/tc/mod.rs b/users/grfn/achilles/src/tc/mod.rs deleted file mode 100644 index 5825bab1fb..0000000000 --- a/users/grfn/achilles/src/tc/mod.rs +++ /dev/null @@ -1,808 +0,0 @@ -use bimap::BiMap; -use derive_more::From; -use itertools::Itertools; -use std::cell::RefCell; -use std::collections::HashMap; -use std::convert::{TryFrom, TryInto}; -use std::fmt::{self, Display}; -use std::{mem, result}; -use thiserror::Error; - -use crate::ast::{self, hir, Arg, BinaryOperator, Ident, Literal, Pattern}; -use crate::common::env::Env; -use crate::common::{Namer, NamerOf}; - -#[derive(Debug, Error)] -pub enum Error { - #[error("Undefined variable {0}")] - UndefinedVariable(Ident<'static>), - - #[error("Mismatched types: expected {expected}, but got {actual}")] - TypeMismatch { expected: Type, actual: Type }, - - #[error("Mismatched types, expected numeric type, but got {0}")] - NonNumeric(Type), - - #[error("Ambiguous type {0}")] - AmbiguousType(TyVar), -} - -pub type Result<T> = result::Result<T, Error>; - -#[derive(Debug, PartialEq, Eq, Clone, Copy, Hash)] -pub struct TyVar(u64); - -impl Display for TyVar { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - write!(f, "t{}", self.0) - } -} - -#[derive(Debug, PartialEq, Eq, Clone, Hash)] -pub struct NullaryType(String); - -impl Display for NullaryType { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.write_str(&self.0) - } -} - -#[derive(Debug, PartialEq, Eq, Clone, Copy)] -pub enum PrimType { - Int, - Float, - Bool, - CString, -} - -impl<'a> From<PrimType> for ast::Type<'a> { - fn from(pr: PrimType) -> Self { - match pr { - PrimType::Int => ast::Type::Int, - PrimType::Float => ast::Type::Float, - PrimType::Bool => ast::Type::Bool, - PrimType::CString => ast::Type::CString, - } - } -} - -impl Display for PrimType { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - PrimType::Int => f.write_str("int"), - PrimType::Float => f.write_str("float"), - PrimType::Bool => f.write_str("bool"), - PrimType::CString => f.write_str("cstring"), - } - } -} - -#[derive(Debug, PartialEq, Eq, Clone, From)] -pub enum Type { - #[from(ignore)] - Univ(TyVar), - #[from(ignore)] - Exist(TyVar), - Nullary(NullaryType), - Prim(PrimType), - Tuple(Vec<Type>), - Unit, - Fun { - args: Vec<Type>, - ret: Box<Type>, - }, -} - -impl<'a> TryFrom<Type> for ast::Type<'a> { - type Error = Type; - - fn try_from(value: Type) -> result::Result<Self, Self::Error> { - match value { - Type::Unit => Ok(ast::Type::Unit), - Type::Univ(_) => todo!(), - Type::Exist(_) => Err(value), - Type::Nullary(_) => todo!(), - Type::Prim(p) => Ok(p.into()), - Type::Tuple(members) => Ok(ast::Type::Tuple( - members.into_iter().map(|ty| ty.try_into()).try_collect()?, - )), - Type::Fun { ref args, ref ret } => Ok(ast::Type::Function(ast::FunctionType { - args: args - .clone() - .into_iter() - .map(Self::try_from) - .try_collect() - .map_err(|_| value.clone())?, - ret: Box::new((*ret.clone()).try_into().map_err(|_| value.clone())?), - })), - } - } -} - -const INT: Type = Type::Prim(PrimType::Int); -const FLOAT: Type = Type::Prim(PrimType::Float); -const BOOL: Type = Type::Prim(PrimType::Bool); -const CSTRING: Type = Type::Prim(PrimType::CString); - -impl Display for Type { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - Type::Nullary(nt) => nt.fmt(f), - Type::Prim(p) => p.fmt(f), - Type::Univ(TyVar(n)) => write!(f, "∀{}", n), - Type::Exist(TyVar(n)) => write!(f, "∃{}", n), - Type::Fun { args, ret } => write!(f, "fn {} -> {}", args.iter().join(", "), ret), - Type::Tuple(members) => write!(f, "({})", members.iter().join(", ")), - Type::Unit => write!(f, "()"), - } - } -} - -struct Typechecker<'ast> { - ty_var_namer: NamerOf<TyVar>, - ctx: HashMap<TyVar, Type>, - env: Env<Ident<'ast>, Type>, - - /// AST type var -> type - instantiations: Env<Ident<'ast>, Type>, - - /// AST type-var -> universal TyVar - type_vars: RefCell<(BiMap<Ident<'ast>, TyVar>, NamerOf<Ident<'static>>)>, -} - -impl<'ast> Typechecker<'ast> { - fn new() -> Self { - Self { - ty_var_namer: Namer::new(TyVar).boxed(), - type_vars: RefCell::new(( - Default::default(), - Namer::alphabetic().map(|n| Ident::try_from(n).unwrap()), - )), - ctx: Default::default(), - env: Default::default(), - instantiations: Default::default(), - } - } - - fn bind_pattern( - &mut self, - pat: Pattern<'ast>, - type_: Type, - ) -> Result<hir::Pattern<'ast, Type>> { - match pat { - Pattern::Id(ident) => { - self.env.set(ident.clone(), type_.clone()); - Ok(hir::Pattern::Id(ident, type_)) - } - Pattern::Tuple(members) => { - let mut tys = Vec::with_capacity(members.len()); - let mut hir_members = Vec::with_capacity(members.len()); - for pat in members { - let ty = self.fresh_ex(); - hir_members.push(self.bind_pattern(pat, ty.clone())?); - tys.push(ty); - } - let tuple_type = Type::Tuple(tys); - self.unify(&tuple_type, &type_)?; - Ok(hir::Pattern::Tuple(hir_members)) - } - } - } - - pub(crate) fn tc_expr(&mut self, expr: ast::Expr<'ast>) -> Result<hir::Expr<'ast, Type>> { - match expr { - ast::Expr::Ident(ident) => { - let type_ = self - .env - .resolve(&ident) - .ok_or_else(|| Error::UndefinedVariable(ident.to_owned()))? - .clone(); - Ok(hir::Expr::Ident(ident, type_)) - } - ast::Expr::Literal(lit) => { - let type_ = match lit { - Literal::Int(_) => Type::Prim(PrimType::Int), - Literal::Bool(_) => Type::Prim(PrimType::Bool), - Literal::String(_) => Type::Prim(PrimType::CString), - Literal::Unit => Type::Unit, - }; - Ok(hir::Expr::Literal(lit.to_owned(), type_)) - } - ast::Expr::Tuple(members) => { - let members = members - .into_iter() - .map(|expr| self.tc_expr(expr)) - .collect::<Result<Vec<_>>>()?; - let type_ = Type::Tuple(members.iter().map(|expr| expr.type_().clone()).collect()); - Ok(hir::Expr::Tuple(members, type_)) - } - ast::Expr::UnaryOp { op, rhs } => todo!(), - ast::Expr::BinaryOp { lhs, op, rhs } => { - let lhs = self.tc_expr(*lhs)?; - let rhs = self.tc_expr(*rhs)?; - let type_ = match op { - BinaryOperator::Equ | BinaryOperator::Neq => { - self.unify(lhs.type_(), rhs.type_())?; - Type::Prim(PrimType::Bool) - } - BinaryOperator::Add | BinaryOperator::Sub | BinaryOperator::Mul => { - let ty = self.unify(lhs.type_(), rhs.type_())?; - // if !matches!(ty, Type::Int | Type::Float) { - // return Err(Error::NonNumeric(ty)); - // } - ty - } - BinaryOperator::Div => todo!(), - BinaryOperator::Pow => todo!(), - }; - Ok(hir::Expr::BinaryOp { - lhs: Box::new(lhs), - op, - rhs: Box::new(rhs), - type_, - }) - } - ast::Expr::Let { bindings, body } => { - self.env.push(); - let bindings = bindings - .into_iter() - .map( - |ast::Binding { pat, type_, body }| -> Result<hir::Binding<Type>> { - let body = self.tc_expr(body)?; - if let Some(type_) = type_ { - let type_ = self.type_from_ast_type(type_); - self.unify(body.type_(), &type_)?; - } - let pat = self.bind_pattern(pat, body.type_().clone())?; - Ok(hir::Binding { pat, body }) - }, - ) - .collect::<Result<Vec<hir::Binding<Type>>>>()?; - let body = self.tc_expr(*body)?; - self.env.pop(); - Ok(hir::Expr::Let { - bindings, - type_: body.type_().clone(), - body: Box::new(body), - }) - } - ast::Expr::If { - condition, - then, - else_, - } => { - let condition = self.tc_expr(*condition)?; - self.unify(&Type::Prim(PrimType::Bool), condition.type_())?; - let then = self.tc_expr(*then)?; - let else_ = self.tc_expr(*else_)?; - let type_ = self.unify(then.type_(), else_.type_())?; - Ok(hir::Expr::If { - condition: Box::new(condition), - then: Box::new(then), - else_: Box::new(else_), - type_, - }) - } - ast::Expr::Fun(f) => { - let ast::Fun { args, body } = *f; - self.env.push(); - let args: Vec<_> = args - .into_iter() - .map(|Arg { ident, type_ }| { - let ty = match type_ { - Some(t) => self.type_from_ast_type(t), - None => self.fresh_ex(), - }; - self.env.set(ident.clone(), ty.clone()); - (ident, ty) - }) - .collect(); - let body = self.tc_expr(body)?; - self.env.pop(); - Ok(hir::Expr::Fun { - type_: Type::Fun { - args: args.iter().map(|(_, ty)| ty.clone()).collect(), - ret: Box::new(body.type_().clone()), - }, - type_args: vec![], // TODO fill in once we do let generalization - args, - body: Box::new(body), - }) - } - ast::Expr::Call { fun, args } => { - let ret_ty = self.fresh_ex(); - let arg_tys = args.iter().map(|_| self.fresh_ex()).collect::<Vec<_>>(); - let ft = Type::Fun { - args: arg_tys.clone(), - ret: Box::new(ret_ty.clone()), - }; - let fun = self.tc_expr(*fun)?; - self.instantiations.push(); - self.unify(&ft, fun.type_())?; - let args = args - .into_iter() - .zip(arg_tys) - .map(|(arg, ty)| { - let arg = self.tc_expr(arg)?; - self.unify(&ty, arg.type_())?; - Ok(arg) - }) - .try_collect()?; - let type_args = self.commit_instantiations(); - Ok(hir::Expr::Call { - fun: Box::new(fun), - type_args, - args, - type_: ret_ty, - }) - } - ast::Expr::Ascription { expr, type_ } => { - let expr = self.tc_expr(*expr)?; - let type_ = self.type_from_ast_type(type_); - self.unify(expr.type_(), &type_)?; - Ok(expr) - } - } - } - - pub(crate) fn tc_decl( - &mut self, - decl: ast::Decl<'ast>, - ) -> Result<Option<hir::Decl<'ast, Type>>> { - match decl { - ast::Decl::Fun { name, body } => { - let mut expr = ast::Expr::Fun(Box::new(body)); - if let Some(type_) = self.env.resolve(&name) { - expr = ast::Expr::Ascription { - expr: Box::new(expr), - type_: self.finalize_type(type_.clone())?, - }; - } - - self.env.push(); - let body = self.tc_expr(expr)?; - let type_ = body.type_().clone(); - self.env.set(name.clone(), type_); - self.env.pop(); - match body { - hir::Expr::Fun { - type_args, - args, - body, - type_, - } => Ok(Some(hir::Decl::Fun { - name, - type_args, - args, - body, - type_, - })), - _ => unreachable!(), - } - } - ast::Decl::Ascription { name, type_ } => { - let type_ = self.type_from_ast_type(type_); - self.env.set(name.clone(), type_); - Ok(None) - } - ast::Decl::Extern { name, type_ } => { - let type_ = self.type_from_ast_type(ast::Type::Function(type_)); - self.env.set(name.clone(), type_.clone()); - let (arg_types, ret_type) = match type_ { - Type::Fun { args, ret } => (args, *ret), - _ => unreachable!(), - }; - Ok(Some(hir::Decl::Extern { - name, - arg_types, - ret_type, - })) - } - } - } - - fn fresh_tv(&mut self) -> TyVar { - self.ty_var_namer.make_name() - } - - fn fresh_ex(&mut self) -> Type { - Type::Exist(self.fresh_tv()) - } - - fn fresh_univ(&mut self) -> Type { - Type::Univ(self.fresh_tv()) - } - - fn unify(&mut self, ty1: &Type, ty2: &Type) -> Result<Type> { - match (ty1, ty2) { - (Type::Unit, Type::Unit) => Ok(Type::Unit), - (Type::Exist(tv), ty) | (ty, Type::Exist(tv)) => match self.resolve_tv(*tv)? { - Some(existing_ty) if self.types_match(ty, &existing_ty) => Ok(ty.clone()), - Some(var @ ast::Type::Var(_)) => { - let var = self.type_from_ast_type(var); - self.unify(&var, ty) - } - Some(existing_ty) => match ty { - Type::Exist(_) => { - let rhs = self.type_from_ast_type(existing_ty); - self.unify(ty, &rhs) - } - _ => Err(Error::TypeMismatch { - expected: ty.clone(), - actual: self.type_from_ast_type(existing_ty), - }), - }, - None => match self.ctx.insert(*tv, ty.clone()) { - Some(existing) => self.unify(&existing, ty), - None => Ok(ty.clone()), - }, - }, - (Type::Univ(u1), Type::Univ(u2)) if u1 == u2 => Ok(ty2.clone()), - (Type::Univ(u), ty) | (ty, Type::Univ(u)) => { - let ident = self.name_univ(*u); - match self.instantiations.resolve(&ident) { - Some(existing_ty) if ty == existing_ty => Ok(ty.clone()), - Some(existing_ty) => Err(Error::TypeMismatch { - expected: ty.clone(), - actual: existing_ty.clone(), - }), - None => { - self.instantiations.set(ident, ty.clone()); - Ok(ty.clone()) - } - } - } - (Type::Prim(p1), Type::Prim(p2)) if p1 == p2 => Ok(ty2.clone()), - (Type::Tuple(t1), Type::Tuple(t2)) if t1.len() == t2.len() => { - let ts = t1 - .iter() - .zip(t2.iter()) - .map(|(t1, t2)| self.unify(t1, t2)) - .try_collect()?; - Ok(Type::Tuple(ts)) - } - ( - Type::Fun { - args: args1, - ret: ret1, - }, - Type::Fun { - args: args2, - ret: ret2, - }, - ) => { - let args = args1 - .iter() - .zip(args2) - .map(|(t1, t2)| self.unify(t1, t2)) - .try_collect()?; - let ret = self.unify(ret1, ret2)?; - Ok(Type::Fun { - args, - ret: Box::new(ret), - }) - } - (Type::Nullary(_), _) | (_, Type::Nullary(_)) => todo!(), - _ => Err(Error::TypeMismatch { - expected: ty1.clone(), - actual: ty2.clone(), - }), - } - } - - fn finalize_expr( - &self, - expr: hir::Expr<'ast, Type>, - ) -> Result<hir::Expr<'ast, ast::Type<'ast>>> { - expr.traverse_type(|ty| self.finalize_type(ty)) - } - - fn finalize_decl( - &mut self, - decl: hir::Decl<'ast, Type>, - ) -> Result<hir::Decl<'ast, ast::Type<'ast>>> { - let res = decl.traverse_type(|ty| self.finalize_type(ty))?; - if let Some(type_) = res.type_() { - let ty = self.type_from_ast_type(type_.clone()); - self.env.set(res.name().clone(), ty); - } - Ok(res) - } - - fn finalize_type(&self, ty: Type) -> Result<ast::Type<'static>> { - let ret = match ty { - Type::Exist(tv) => self.resolve_tv(tv)?.ok_or(Error::AmbiguousType(tv)), - Type::Univ(tv) => Ok(ast::Type::Var(self.name_univ(tv))), - Type::Unit => Ok(ast::Type::Unit), - Type::Nullary(_) => todo!(), - Type::Prim(pr) => Ok(pr.into()), - Type::Tuple(members) => Ok(ast::Type::Tuple( - members - .into_iter() - .map(|ty| self.finalize_type(ty)) - .try_collect()?, - )), - Type::Fun { args, ret } => Ok(ast::Type::Function(ast::FunctionType { - args: args - .into_iter() - .map(|ty| self.finalize_type(ty)) - .try_collect()?, - ret: Box::new(self.finalize_type(*ret)?), - })), - }; - ret - } - - fn resolve_tv(&self, tv: TyVar) -> Result<Option<ast::Type<'static>>> { - let mut res = &Type::Exist(tv); - Ok(loop { - match res { - Type::Exist(tv) => { - res = match self.ctx.get(tv) { - Some(r) => r, - None => return Ok(None), - }; - } - Type::Univ(tv) => { - let ident = self.name_univ(*tv); - if let Some(r) = self.instantiations.resolve(&ident) { - res = r; - } else { - break Some(ast::Type::Var(ident)); - } - } - Type::Nullary(_) => todo!(), - Type::Prim(pr) => break Some((*pr).into()), - Type::Unit => break Some(ast::Type::Unit), - Type::Fun { args, ret } => todo!(), - Type::Tuple(_) => break Some(self.finalize_type(res.clone())?), - } - }) - } - - fn type_from_ast_type(&mut self, ast_type: ast::Type<'ast>) -> Type { - match ast_type { - ast::Type::Unit => Type::Unit, - ast::Type::Int => INT, - ast::Type::Float => FLOAT, - ast::Type::Bool => BOOL, - ast::Type::CString => CSTRING, - ast::Type::Tuple(members) => Type::Tuple( - members - .into_iter() - .map(|ty| self.type_from_ast_type(ty)) - .collect(), - ), - ast::Type::Function(ast::FunctionType { args, ret }) => Type::Fun { - args: args - .into_iter() - .map(|t| self.type_from_ast_type(t)) - .collect(), - ret: Box::new(self.type_from_ast_type(*ret)), - }, - ast::Type::Var(id) => Type::Univ({ - let opt_tv = { self.type_vars.borrow_mut().0.get_by_left(&id).copied() }; - opt_tv.unwrap_or_else(|| { - let tv = self.fresh_tv(); - self.type_vars - .borrow_mut() - .0 - .insert_no_overwrite(id, tv) - .unwrap(); - tv - }) - }), - } - } - - fn name_univ(&self, tv: TyVar) -> Ident<'static> { - let mut vars = self.type_vars.borrow_mut(); - vars.0 - .get_by_right(&tv) - .map(Ident::to_owned) - .unwrap_or_else(|| { - let name = loop { - let name = vars.1.make_name(); - if !vars.0.contains_left(&name) { - break name; - } - }; - vars.0.insert_no_overwrite(name.clone(), tv).unwrap(); - name - }) - } - - fn commit_instantiations(&mut self) -> HashMap<Ident<'ast>, Type> { - let mut res = HashMap::new(); - let mut ctx = mem::take(&mut self.ctx); - for (_, v) in ctx.iter_mut() { - if let Type::Univ(tv) = v { - let tv_name = self.name_univ(*tv); - if let Some(concrete) = self.instantiations.resolve(&tv_name) { - res.insert(tv_name, concrete.clone()); - *v = concrete.clone(); - } - } - } - self.ctx = ctx; - self.instantiations.pop(); - res - } - - fn types_match(&self, type_: &Type, ast_type: &ast::Type<'ast>) -> bool { - match (type_, ast_type) { - (Type::Univ(u), ast::Type::Var(v)) => { - Some(u) == self.type_vars.borrow().0.get_by_left(v) - } - (Type::Univ(_), _) => false, - (Type::Exist(_), _) => false, - (Type::Unit, ast::Type::Unit) => true, - (Type::Unit, _) => false, - (Type::Nullary(_), _) => todo!(), - (Type::Prim(pr), ty) => ast::Type::from(*pr) == *ty, - (Type::Tuple(members), ast::Type::Tuple(members2)) => members - .iter() - .zip(members2.iter()) - .all(|(t1, t2)| self.types_match(t1, t2)), - (Type::Tuple(members), _) => false, - (Type::Fun { args, ret }, ast::Type::Function(ft)) => { - args.len() == ft.args.len() - && args - .iter() - .zip(&ft.args) - .all(|(a1, a2)| self.types_match(a1, &a2)) - && self.types_match(&*ret, &*ft.ret) - } - (Type::Fun { .. }, _) => false, - } - } -} - -pub fn typecheck_expr(expr: ast::Expr) -> Result<hir::Expr<ast::Type>> { - let mut typechecker = Typechecker::new(); - let typechecked = typechecker.tc_expr(expr)?; - typechecker.finalize_expr(typechecked) -} - -pub fn typecheck_toplevel(decls: Vec<ast::Decl>) -> Result<Vec<hir::Decl<ast::Type>>> { - let mut typechecker = Typechecker::new(); - let mut res = Vec::with_capacity(decls.len()); - for decl in decls { - if let Some(hir_decl) = typechecker.tc_decl(decl)? { - let hir_decl = typechecker.finalize_decl(hir_decl)?; - res.push(hir_decl); - } - typechecker.ctx.clear(); - } - Ok(res) -} - -#[cfg(test)] -mod tests { - use super::*; - - macro_rules! assert_type { - ($expr: expr, $type: expr) => { - use crate::parser::{expr, type_}; - let parsed_expr = test_parse!(expr, $expr); - let parsed_type = test_parse!(type_, $type); - let res = typecheck_expr(parsed_expr).unwrap_or_else(|e| panic!("{}", e)); - assert!( - res.type_().alpha_equiv(&parsed_type), - "{} inferred type {}, but expected {}", - $expr, - res.type_(), - $type - ); - }; - - (toplevel($program: expr), $($decl: ident => $type: expr),+ $(,)?) => {{ - use crate::parser::{toplevel, type_}; - let program = test_parse!(toplevel, $program); - let res = typecheck_toplevel(program).unwrap_or_else(|e| panic!("{}", e)); - $( - let parsed_type = test_parse!(type_, $type); - let ident = Ident::try_from(::std::stringify!($decl)).unwrap(); - let decl = res.iter().find(|decl| { - matches!(decl, crate::ast::hir::Decl::Fun { name, .. } if name == &ident) - }).unwrap_or_else(|| panic!("Could not find declaration for {}", ident)); - assert!( - decl.type_().unwrap().alpha_equiv(&parsed_type), - "inferred type {} for {}, but expected {}", - decl.type_().unwrap(), - ident, - $type - ); - )+ - }}; - } - - macro_rules! assert_type_error { - ($expr: expr) => { - use crate::parser::expr; - let parsed_expr = test_parse!(expr, $expr); - let res = typecheck_expr(parsed_expr); - assert!( - res.is_err(), - "Expected type error, but got type: {}", - res.unwrap().type_() - ); - }; - } - - #[test] - fn literal_int() { - assert_type!("1", "int"); - } - - #[test] - fn conditional() { - assert_type!("if 1 == 2 then 3 else 4", "int"); - } - - #[test] - #[ignore] - fn add_bools() { - assert_type_error!("true + false"); - } - - #[test] - fn call_generic_function() { - assert_type!("(fn x = x) 1", "int"); - } - - #[test] - fn call_let_bound_generic() { - assert_type!("let id = fn x = x in id 1", "int"); - } - - #[test] - fn universal_ascripted_let() { - assert_type!("let id: fn a -> a = fn x = x in id 1", "int"); - } - - #[test] - fn call_generic_function_toplevel() { - assert_type!( - toplevel( - "ty id : fn a -> a - fn id x = x - - fn main = id 0" - ), - main => "fn -> int", - id => "fn a -> a", - ); - } - - #[test] - #[ignore] - fn let_generalization() { - assert_type!("let id = fn x = x in if id true then id 1 else 2", "int"); - } - - #[test] - fn concrete_function() { - assert_type!("fn x = x + 1", "fn int -> int"); - } - - #[test] - fn arg_ascriptions() { - assert_type!("fn (x: int) = x", "fn int -> int"); - } - - #[test] - fn call_concrete_function() { - assert_type!("(fn x = x + 1) 2", "int"); - } - - #[test] - fn conditional_non_bool() { - assert_type_error!("if 3 then true else false"); - } - - #[test] - fn let_int() { - assert_type!("let x = 1 in x", "int"); - } -} diff --git a/users/grfn/achilles/tests/compile.rs b/users/grfn/achilles/tests/compile.rs deleted file mode 100644 index 0f1086bfd8..0000000000 --- a/users/grfn/achilles/tests/compile.rs +++ /dev/null @@ -1,79 +0,0 @@ -use std::process::Command; - -use crate_root::root; - -struct Fixture { - name: &'static str, - exit_code: i32, - expected_output: &'static str, -} - -const FIXTURES: &[Fixture] = &[ - Fixture { - name: "simple", - exit_code: 5, - expected_output: "", - }, - Fixture { - name: "functions", - exit_code: 9, - expected_output: "", - }, - Fixture { - name: "externs", - exit_code: 0, - expected_output: "foobar\n", - }, - Fixture { - name: "units", - exit_code: 0, - expected_output: "hi\n", - }, -]; - -#[test] -fn compile_and_run_files() { - let ach = root().unwrap().join("ach"); - - println!("Running: `make clean`"); - assert!( - Command::new("make") - .arg("clean") - .current_dir(&ach) - .spawn() - .unwrap() - .wait() - .unwrap() - .success(), - "make clean failed" - ); - - for Fixture { - name, - exit_code, - expected_output, - } in FIXTURES - { - println!(">>> Testing: {}", name); - - println!(" Running: `make {}`", name); - assert!( - Command::new("make") - .arg(name) - .current_dir(&ach) - .spawn() - .unwrap() - .wait() - .unwrap() - .success(), - "make failed" - ); - - let out_path = ach.join(name); - println!(" Running: `{}`", out_path.to_str().unwrap()); - let output = Command::new(out_path).output().unwrap(); - assert_eq!(output.status.code().unwrap(), *exit_code,); - assert_eq!(output.stdout, expected_output.as_bytes()); - println!(" OK"); - } -} |