LunarAkai/AkaiLang
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hey it can calculate 4 again xP

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LunarAkai 2025-08-07 00:29:16 +02:00
commit d253497b3e
11 changed files with 137 additions and 95 deletions
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31
src/language_frontend/parser.rs
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@ -1,7 +1,14 @@
use chumsky::{combinator::Or, prelude::{choice, just, recursive}, recursive, select, text::{self, ascii::ident}, IterParser, Parser};
use chumsky::{
IterParser, Parser,
combinator::Or,
prelude::{choice, just, recursive},
recursive, select,
text::{self, ascii::ident},
};
use crate::{language_frontend::ast::ast::Expression, language_frontend::tokens::Token};
use crate::{language_frontend::abstract_syntax_tree::ast::Expression, language_frontend::lexer::tokens::Token};
// goal of parsing is to construct an abstract syntax tree
#[allow(clippy::let_and_return)]
pub fn parser<'src>() -> impl Parser<'src, &'src [Token<'src>], Expression<'src>> {
@ -9,16 +16,16 @@ pub fn parser<'src>() -> impl Parser<'src, &'src [Token<'src>], Expression<'src>
Token::Ident(ident) => ident
};
let keyword = |kw: &'static str| select! {
Token::Keyword(k) if k == kw => ()
let keyword = |kw: &'static str| {
select! {
Token::Keyword(k) if k == kw => ()
}
};
let eq = just(Token::Equals);
let expr = recursive(
|expr|
{
let atom = {
let expr = recursive(|expr| {
let atom = {
let parenthesized = expr
.clone()
.delimited_by(just(Token::ParenBegin), just(Token::ParenEnd));
@ -63,7 +70,7 @@ pub fn parser<'src>() -> impl Parser<'src, &'src [Token<'src>], Expression<'src>
let decl = recursive(|decl| {
let r#var = keyword("var")
.ignore_then(ident.clone())
.ignore_then(ident.clone())
.then_ignore(eq.clone())
.then(decl.clone())
.then(decl.clone())
@ -84,10 +91,10 @@ pub fn parser<'src>() -> impl Parser<'src, &'src [Token<'src>], Expression<'src>
args,
body: Box::new(body),
then: Box::new(then),
});
});
var.or(r#fun).or(expr)
});
decl
}
}