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/grfn/achilles/src/parser/type_.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/grfn/achilles/src/parser/type_.rs')
-rw-r--r-- | users/grfn/achilles/src/parser/type_.rs | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/users/grfn/achilles/src/parser/type_.rs b/users/grfn/achilles/src/parser/type_.rs new file mode 100644 index 000000000000..8a1081e2521f --- /dev/null +++ b/users/grfn/achilles/src/parser/type_.rs @@ -0,0 +1,127 @@ +use nom::character::complete::{multispace0, multispace1}; +use nom::{alt, delimited, do_parse, map, named, opt, separated_list0, tag, terminated, tuple}; + +use super::ident; +use crate::ast::{FunctionType, Type}; + +named!(pub function_type(&str) -> FunctionType, do_parse!( + tag!("fn") + >> multispace1 + >> args: map!(opt!(terminated!(separated_list0!( + tuple!( + multispace0, + tag!(","), + multispace0 + ), + type_ + ), multispace1)), |args| args.unwrap_or_default()) + >> tag!("->") + >> multispace1 + >> ret: type_ + >> (FunctionType { + args, + ret: Box::new(ret) + }) +)); + +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 } | + 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 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())), + }) + ) + } +} |