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Parse named function definitions

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This commit is contained in:
Joscha 2022-11-19 19:24:23 +01:00
parent ff3edf17e5
commit 0099277644
3 changed files with 95 additions and 9 deletions
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90
src/parser/func_defs.rs
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@ -2,7 +2,7 @@ use chumsky::prelude::*;
use crate::ast::{Expr, FuncDef};
use super::basic::{ident, space, Error};
use super::basic::{ident, local, space, Error};
use super::table_destr::table_pattern;
fn func_def_anon_no_arg(
@ -66,11 +66,97 @@ fn func_def_anon_destr(
})
}
fn func_def_named_no_arg(
expr: impl Parser<char, Expr, Error = Error>,
) -> impl Parser<char, FuncDef, Error = Error> {
local()
.then_ignore(text::keyword("function"))
.then(space())
.then(ident())
.then(space())
.then_ignore(just('('))
.then(space())
.then_ignore(just(')'))
.then(space())
.then(expr)
.map_with_span(
|((((((local, s0), name), s1), s2), s3), body), span| FuncDef::NamedNoArg {
local,
s0,
name,
s1,
s2,
s3,
body: Box::new(body),
span,
},
)
}
fn func_def_named_arg(
expr: impl Parser<char, Expr, Error = Error>,
) -> impl Parser<char, FuncDef, Error = Error> {
local()
.then_ignore(text::keyword("function"))
.then(space())
.then(ident())
.then(space())
.then_ignore(just('('))
.then(space())
.then(ident())
.then(space())
.then_ignore(just(')'))
.then(space())
.then(expr)
.map_with_span(
|((((((((local, s0), name), s1), s2), arg), s3), s4), body), span| FuncDef::NamedArg {
local,
s0,
name,
s1,
s2,
arg,
s3,
s4,
body: Box::new(body),
span,
},
)
}
fn func_def_named_destr(
expr: impl Parser<char, Expr, Error = Error>,
) -> impl Parser<char, FuncDef, Error = Error> {
local()
.then_ignore(text::keyword("function"))
.then(space())
.then(ident())
.then(space())
.then(table_pattern())
.then(space())
.then(expr)
.map_with_span(|((((((local, s0), name), s1), pattern), s2), body), span| {
FuncDef::NamedDestr {
local,
s0,
name,
s1,
pattern,
s2,
body: Box::new(body),
span,
}
})
}
pub fn func_def(
expr: impl Parser<char, Expr, Error = Error> + Clone + 'static,
) -> BoxedParser<'static, char, FuncDef, Error> {
func_def_anon_no_arg(expr.clone())
.or(func_def_anon_arg(expr.clone()))
.or(func_def_anon_destr(expr))
.or(func_def_anon_destr(expr.clone()))
.or(func_def_named_no_arg(expr.clone()))
.or(func_def_named_arg(expr.clone()))
.or(func_def_named_destr(expr))
.boxed()
}