diff options
author | Griffin Smith <grfn@gws.fyi> | 2021-04-11T21·53-0400 |
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committer | glittershark <grfn@gws.fyi> | 2021-04-12T14·45+0000 |
commit | 6266c5d32f9ff651fcfc3a4cc0c68e89da56ca65 (patch) | |
tree | 5be3967585787c4456e17cb29423770217fdcede /users/glittershark/achilles/src/parser/mod.rs | |
parent | 968effb5dc1a4617a0dceaffc70e986abe300c6e (diff) |
refactor(users/glittershark): Rename to grfn r/2485
Rename my //users directory and all places that refer to glittershark to grfn, including nix references and documentation. This may require some extra attention inside of gerrit's database after it lands to allow me to actually push things. Change-Id: I4728b7ec2c60024392c1c1fa6e0d4a59b3e266fa Reviewed-on: https://cl.tvl.fyi/c/depot/+/2933 Tested-by: BuildkiteCI Reviewed-by: tazjin <mail@tazj.in> Reviewed-by: lukegb <lukegb@tvl.fyi> Reviewed-by: glittershark <grfn@gws.fyi>
Diffstat (limited to 'users/glittershark/achilles/src/parser/mod.rs')
-rw-r--r-- | users/glittershark/achilles/src/parser/mod.rs | 239 |
1 files changed, 0 insertions, 239 deletions
diff --git a/users/glittershark/achilles/src/parser/mod.rs b/users/glittershark/achilles/src/parser/mod.rs deleted file mode 100644 index 3e0081bd391d..000000000000 --- a/users/glittershark/achilles/src/parser/mod.rs +++ /dev/null @@ -1,239 +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_; - -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), - }, - } - ) - } -} |