diff options
| -rw-r--r-- | src/libsyntax/parse/parser.rs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs index bfa42e76129..edb1f7eb926 100644 --- a/src/libsyntax/parse/parser.rs +++ b/src/libsyntax/parse/parser.rs @@ -2199,6 +2199,12 @@ impl<'a> Parser<'a> { UnsafeBlock(ast::UserProvided), attrs); } + if self.eat_keyword(keywords::Let) { + return Err(self.span_fatal(self.span, + "`let` is not an expression, so it cannot \ + be used in this way")) + + } if self.eat_keyword(keywords::Return) { if self.token.can_begin_expr() { let e = try!(self.parse_expr()); |