diff options
| author | Barosl Lee <vcs@barosl.com> | 2014-12-20 01:42:21 +0900 |
|---|---|---|
| committer | Barosl Lee <vcs@barosl.com> | 2014-12-20 09:17:14 +0900 |
| commit | 7023bea22c969a324d7d95d8794370410ff7c4c9 (patch) | |
| tree | 81cf841e8b8a055ea0517888c1daddadd6469e5f /src/libsyntax/ext | |
| parent | cbe9fb45bc705a89f23b434c686544d490923596 (diff) | |
| download | rust-7023bea22c969a324d7d95d8794370410ff7c4c9.tar.gz rust-7023bea22c969a324d7d95d8794370410ff7c4c9.zip | |
Print a friendly error for the if-let construct without an else block
Fixes #19991.
Diffstat (limited to 'src/libsyntax/ext')
| -rw-r--r-- | src/libsyntax/ext/expand.rs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/libsyntax/ext/expand.rs b/src/libsyntax/ext/expand.rs index 20c8ff20b71..63bd38de8a0 100644 --- a/src/libsyntax/ext/expand.rs +++ b/src/libsyntax/ext/expand.rs @@ -170,7 +170,9 @@ pub fn expand_expr(e: P<ast::Expr>, fld: &mut MacroExpander) -> P<ast::Expr> { arms.extend(else_if_arms.into_iter()); arms.push(else_arm); - let match_expr = fld.cx.expr(span, ast::ExprMatch(expr, arms, ast::MatchIfLetDesugar)); + let match_expr = fld.cx.expr(span, ast::ExprMatch(expr, + arms, + ast::MatchIfLetDesugar(elseopt.is_some()))); fld.fold_expr(match_expr) } |