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libsyntax: Don't allow impl (Trait) for Type (with the parentheses).

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Patrick Walton 2013-03-28 18:55:35 -07:00
parent 943d7adedc
commit 36909c7575
1 changed files with 5 additions and 1 deletions
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6
src/libsyntax/parse/parser.rs
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@ -3107,11 +3107,15 @@ pub impl Parser {
// XXX: clownshoes // XXX: clownshoes
let ident = special_idents::clownshoes_extensions; let ident = special_idents::clownshoes_extensions;
// Special case: if the next identifier that follows is '(', don't
// allow this to be parsed as a trait.
let could_be_trait = *self.token != token::LPAREN;
// Parse the trait. // Parse the trait.
let mut ty = self.parse_ty(false); let mut ty = self.parse_ty(false);
// Parse traits, if necessary. // Parse traits, if necessary.
let opt_trait = if self.eat_keyword(&~"for") { let opt_trait = if could_be_trait && self.eat_keyword(&~"for") {
// New-style trait. Reinterpret the type as a trait. // New-style trait. Reinterpret the type as a trait.
let opt_trait_ref = match ty.node { let opt_trait_ref = match ty.node {
ty_path(path, node_id) => { ty_path(path, node_id) => {