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Add 'continue' as a synonym for 'loop'

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This commit is contained in:
Brian Anderson 2013-09-25 17:56:54 -07:00
parent 41826c48ed
commit 88272a4f24
6 changed files with 54 additions and 39 deletions
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12
src/libsyntax/parse/parser.rs
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@ -1786,6 +1786,17 @@ impl Parser {
}
} else if self.eat_keyword(keywords::Loop) {
return self.parse_loop_expr(None);
} else if self.eat_keyword(keywords::Continue) {
let lo = self.span.lo;
let ex = if self.token_is_lifetime(&*self.token) {
let lifetime = self.get_lifetime(&*self.token);
self.bump();
ExprAgain(Some(lifetime.name))
} else {
ExprAgain(None)
};
let hi = self.span.hi;
return self.mk_expr(lo, hi, ex);
} else if self.eat_keyword(keywords::Match) {
return self.parse_match_expr();
} else if self.eat_keyword(keywords::Unsafe) {
@ -2578,6 +2589,7 @@ impl Parser {
return self.mk_expr(lo, hi, ExprLoop(body, opt_ident));
} else {
// This is a 'continue' expression
// FIXME #9467 rm support for 'loop' here after snapshot
if opt_ident.is_some() {
self.span_err(*self.last_span,
"a label may not be used with a `loop` expression");