PR3062: statement expressions should be illegal at file scope. I don't
think this has any significant effects at the moment, but it could
matter if we start constant-folding statement expressions like gcc does.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62943 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index d4babb4..1d55ed7 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -3940,6 +3940,11 @@
assert(SubStmt && isa<CompoundStmt>(SubStmt) && "Invalid action invocation!");
CompoundStmt *Compound = cast<CompoundStmt>(SubStmt);
+ bool isFileScope = getCurFunctionOrMethodDecl() == 0;
+ if (isFileScope) {
+ return Diag(LPLoc, diag::err_stmtexpr_file_scope);
+ }
+
// FIXME: there are a variety of strange constraints to enforce here, for
// example, it is not possible to goto into a stmt expression apparently.
// More semantic analysis is needed.