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Create each main parser only once

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This commit is contained in:
Joscha 2022-11-19 20:50:26 +01:00
parent b291619d10
commit ea7518b183
10 changed files with 346 additions and 222 deletions
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11
src/parser/basic.rs
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@ -7,8 +7,7 @@ use crate::ast::{Ident, Line, Space};
use crate::span::Span;
pub type Error = Simple<char, Span>;
// TODO https://github.com/rust-lang/rust/issues/63063
pub type EParser<O> = BoxedParser<'static, char, O, Error>;
fn inline() -> impl Parser<char, (), Error = Error> {
filter(|c: &char| c.is_whitespace() && *c != '\n')
@ -32,7 +31,7 @@ fn line() -> impl Parser<char, Line, Error = Error> {
empty.or(comment)
}
pub fn space() -> BoxedParser<'static, char, Space, Error> {
pub fn space() -> EParser<Space> {
inline()
.ignore_then(line())
.repeated()
@ -41,7 +40,7 @@ pub fn space() -> BoxedParser<'static, char, Space, Error> {
.boxed()
}
pub fn ident() -> BoxedParser<'static, char, Ident, Error> {
pub fn ident() -> EParser<Ident> {
text::ident()
.try_map(|name, span| {
if matches!(
@ -56,6 +55,6 @@ pub fn ident() -> BoxedParser<'static, char, Ident, Error> {
.boxed()
}
pub fn local() -> BoxedParser<'static, char, Option<Space>, Error> {
text::keyword("local").ignore_then(space()).or_not().boxed()
pub fn local(space: EParser<Space>) -> EParser<Option<Space>> {
text::keyword("local").ignore_then(space).or_not().boxed()
}