diff options
| -rw-r--r-- | Sema/SemaExpr.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Sema/SemaExpr.cpp b/Sema/SemaExpr.cpp index 3b65ab2bc1..daddb50c71 100644 --- a/Sema/SemaExpr.cpp +++ b/Sema/SemaExpr.cpp @@ -1743,6 +1743,12 @@ Sema::ExprResult Sema::ParseBuiltinOffsetOf(SourceLocation BuiltinLoc, // iteratively process the offsetof designators. Expr *Res = new CompoundLiteralExpr(ArgTy, 0); + // offsetof with non-identifier designators (e.g. "offsetof(x, a.b[c])") are a + // GCC extension, diagnose them. + if (NumComponents != 1) + Diag(BuiltinLoc, diag::ext_offsetof_extended_field_designator, + SourceRange(CompPtr[1].LocStart, CompPtr[NumComponents-1].LocEnd)); + for (unsigned i = 0; i != NumComponents; ++i) { const OffsetOfComponent &OC = CompPtr[i]; if (OC.isBrackets) { |