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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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18
src/parser/prefix.rs
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@ -5,7 +5,7 @@ use chumsky::prelude::*;
use crate::ast::{Expr, Space};
use crate::span::{HasSpan, Span};
use super::basic::{space, Error};
use super::basic::{EParser, Error};
enum Prefix {
/// See [`Expr::Neg`].
@ -35,25 +35,23 @@ impl Prefix {
}
}
fn prefix_neg() -> impl Parser<char, Prefix, Error = Error> {
fn prefix_neg(space: EParser<Space>) -> impl Parser<char, Prefix, Error = Error> {
just('-')
.map_with_span(|_, span| span)
.then(space())
.then(space)
.map(|(minus, s0)| Prefix::Neg { minus, s0 })
}
fn prefix_not() -> impl Parser<char, Prefix, Error = Error> {
fn prefix_not(space: EParser<Space>) -> impl Parser<char, Prefix, Error = Error> {
text::keyword("not")
.map_with_span(|_, span| span)
.then(space())
.then(space)
.map(|(not, s0)| Prefix::Not { not, s0 })
}
pub fn prefixed(
suffixed: impl Parser<char, Expr, Error = Error> + 'static,
) -> BoxedParser<'static, char, Expr, Error> {
let prefix = prefix_neg()
.or(prefix_not())
pub fn prefixed(space: EParser<Space>, suffixed: EParser<Expr>) -> EParser<Expr> {
let prefix = prefix_neg(space.clone())
.or(prefix_not(space))
.map_with_span(|prefix, span| (prefix, span));
prefix