bjoernager/rust
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comments, helper function for tests, more informative error message

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John Clements 2013-04-23 16:47:47 -07:00
parent 50a7f5483b
commit 28b285764c
2 changed files with 17 additions and 2 deletions
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12
src/libsyntax/parse/parser.rs
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@ -1056,6 +1056,9 @@ pub impl Parser {
}
}
// matches lifetimes = ( lifetime ) | ( lifetime , lifetimes )
// actually, it matches the empty one too, but putting that in there
// messes up the grammar....
fn parse_lifetimes(&self) -> OptVec<ast::Lifetime> {
/*!
*
@ -1081,7 +1084,8 @@ pub impl Parser {
token::GT => { return res; }
token::BINOP(token::SHR) => { return res; }
_ => {
self.fatal(~"expected `,` or `>` after lifetime name");
self.fatal(fmt!("expected `,` or `>` after lifetime name, got: %?",
*self.token));
}
}
}
@ -2741,6 +2745,11 @@ pub impl Parser {
if self.eat_keyword(&~"once") { ast::Once } else { ast::Many }
}
// matches optbounds = ( ( : ( boundseq )? )? )
// where boundseq = ( bound + boundseq ) | bound
// and bound = ( 'static ) | ty
// you might want to insist on the boundseq having seen the colon, but
// that's not currently in place.
fn parse_optional_ty_param_bounds(&self) -> @OptVec<TyParamBound> {
if !self.eat(&token::COLON) {
return @opt_vec::Empty;
@ -2801,6 +2810,7 @@ pub impl Parser {
return @result;
}
// matches typaram = IDENT optbounds
fn parse_ty_param(&self) -> TyParam {
let ident = self.parse_ident();
let bounds = self.parse_optional_ty_param_bounds();