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In Microsoft mode, allow conversion from pointer to integral type no matter what size the integral type is. Necessary to parse MFC code. 

Example:
void f(char *ptr) {
  char var = (char)ptr;
}

llvm-svn: 131201
This commit is contained in:
Francois Pichet 2011-05-11 22:13:54 +00:00
parent 2a9dbbbb12
commit b796b632a8
2 changed files with 13 additions and 3 deletions
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8
clang/lib/Sema/SemaCXXCast.cpp
View File

@ -1514,9 +1514,11 @@ static TryCastResult TryReinterpretCast(Sema &Self, ExprResult &SrcExpr,
if (DestType->isIntegralType(Self.Context)) {
assert(srcIsPtr && "One type must be a pointer");
// C++ 5.2.10p4: A pointer can be explicitly converted to any integral
// type large enough to hold it.
if (Self.Context.getTypeSize(SrcType) >
Self.Context.getTypeSize(DestType)) {
// type large enough to hold it; except in Microsoft mode, where the
// integral type size doesn't matter.
if ((Self.Context.getTypeSize(SrcType) >
Self.Context.getTypeSize(DestType)) &&
!Self.getLangOptions().Microsoft) {
msg = diag::err_bad_reinterpret_cast_small_int;
return TC_Failed;
}

8
clang/test/SemaCXX/MicrosoftExtensions.cpp
View File

@ -189,3 +189,11 @@ void function_to_voidptr_conv() {
void *a2 = &function_prototype;
void *a3 = function_ptr;
}
void pointer_to_integral_type_conv(char* ptr) {
char ch = (char)ptr;
short sh = (short)ptr;
ch = (char)ptr;
sh = (short)ptr;
}