From 9e2b75ca9c3fdd03453ffe6b8f41686d3030a92a Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Fri, 31 Aug 2007 21:49:13 +0000 Subject: [PATCH] diagnose extended uses of offsetof git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@41653 91177308-0d34-0410-b5e6-96231b3b80d8 --- Sema/SemaExpr.cpp | 6 ++++++ 1 file changed, 6 insertions(+) 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) { -- 2.50.1