Implementing C99 partial re-initialization behavior (DR-253)

Based on previous discussion on the mailing list, clang currently lacks support
for C99 partial re-initialization behavior:
Reference: http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-April/029188.html
Reference: http://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_253.htm

This patch attempts to fix this problem.

Given the following code snippet,

struct P1 { char x[6]; };
struct LP1 { struct P1 p1; };

struct LP1 l = { .p1 = { "foo" }, .p1.x[2] = 'x' };
// this example is adapted from the example for "struct fred x[]" in DR-253;
// currently clang produces in l: { "\0\0x" },
//   whereas gcc 4.8 produces { "fox" };
// with this fix, clang will also produce: { "fox" };


Differential Review: http://reviews.llvm.org/D5789

llvm-svn: 239446

1 files changed, 2 insertions, 0 deletions

diff --git a/clang/tools/libclang/CXCursor.cpp b/clang/tools/libclang/CXCursor.cpp
index b0446fd0da9..68334d4e14f 100644
--- a/clang/tools/libclang/CXCursor.cpp
+++ b/clang/tools/libclang/CXCursor.cpp
@@ -235,11 +235,13 @@ CXCursor cxcursor::MakeCXCursor(const Stmt *S, const Decl *Parent,
   case Stmt::CXXUuidofExprClass:
   case Stmt::ChooseExprClass:
   case Stmt::DesignatedInitExprClass:
+  case Stmt::DesignatedInitUpdateExprClass:
   case Stmt::ExprWithCleanupsClass:
   case Stmt::ExpressionTraitExprClass:
   case Stmt::ExtVectorElementExprClass:
   case Stmt::ImplicitCastExprClass:
   case Stmt::ImplicitValueInitExprClass:
+  case Stmt::NoInitExprClass:
   case Stmt::MaterializeTemporaryExprClass:
   case Stmt::ObjCIndirectCopyRestoreExprClass:
   case Stmt::OffsetOfExprClass: