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Switch to pratt parser for "as" expressions

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This commit is contained in:
Jeff 2024-05-23 17:45:08 -04:00
parent a0999e30f1
commit 781e3d4263
1 changed files with 9 additions and 14 deletions
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23
dust-lang/src/parser.rs
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@ -349,7 +349,7 @@ pub fn parser<'src>(
),
));
let logic_math_indexes_and_function_calls = atom.pratt((
let logic_math_indexes_as_and_function_calls = atom.pratt((
prefix(
2,
just(Token::Operator(Operator::Not)),
@ -503,22 +503,17 @@ pub fn parser<'src>(
Expression::Math(Box::new(Math::Modulo(left, right)).with_position(span))
},
),
postfix(
2,
just(Token::Keyword(Keyword::As)).ignore_then(r#type.clone()),
|expression, r#type, span| {
Expression::As(Box::new(As::new(expression, r#type)).with_position(span))
},
),
));
let r#as = choice((
basic_value.clone(),
identifier_expression.clone(),
logic_math_indexes_and_function_calls.clone(),
))
.then_ignore(just(Token::Keyword(Keyword::As)))
.then(r#type.clone())
.map_with(|(expression, r#type), state| {
Expression::As(Box::new(As::new(expression, r#type)).with_position(state.span()))
});
choice((
r#as,
logic_math_indexes_and_function_calls,
logic_math_indexes_as_and_function_calls,
built_in_function_call,
range,
structure_instance,