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León Orell Valerian Liehr 2024-07-25 02:47:53 +02:00
parent 79d1ac66a8
commit 7da751a108
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1 changed files with 6 additions and 2 deletions
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8
compiler/rustc_parse/src/parser/ty.rs
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@ -927,8 +927,12 @@ impl<'a> Parser<'a> {
/// If no modifiers are present, this does not consume any tokens.
///
/// ```ebnf
/// TRAIT_BOUND_MODIFIERS = [["~"] "const"] ["async"] ["?" | "!"]
/// CONSTNESS = [["~"] "const"]
/// ASYNCNESS = ["async"]
/// POLARITY = ["?" | "!"]
/// ```
///
/// See `parse_generic_ty_bound` for the complete grammar of trait bound modifiers.
fn parse_trait_bound_modifiers(&mut self) -> PResult<'a, TraitBoundModifiers> {
let modifier_lo = self.token.span;
let constness = if self.eat(&token::Tilde) {
@ -1007,7 +1011,7 @@ impl<'a> Parser<'a> {
/// Parses a type bound according to:
/// ```ebnf
/// TY_BOUND = TY_BOUND_NOPAREN | (TY_BOUND_NOPAREN)
/// TY_BOUND_NOPAREN = [for<LT_PARAM_DEFS>] [TRAIT_BOUND_MODIFIERS] SIMPLE_PATH
/// TY_BOUND_NOPAREN = [for<GENERIC_PARAMS> CONSTNESS ASYNCNESS | POLARITY] SIMPLE_PATH
/// ```
///
/// For example, this grammar accepts `for<'a: 'b> ~const ?m::Trait<'a>`.