https://llvm.org/bugs/show_bug.cgi?id=27733
Bug ID: 27733
Summary: [ms] clang-cl fails to compile WTL header "atlctrlx.h"
and several related samples
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: ku...@list.ru
CC: dgre...@apple.com, llvm-bugs@lists.llvm.org
Classification: Unclassified
!- This problem was found in WTL Sample TabBrowser but affects most all
samples.
It also affects a compilation of WTL header atlctrlx.h, microsoft correctly
compiles such code. Seems that clang incorrectly parses this header.
In small reproducer section you can see a code that is reduced and is using
only headers from VS (including ATL) without using any headers from WTL -!
===========Environment===============
OS: Win
Language: c++
Version: trunk [3.8]
===========How To Reproduce===========
>>>
1) Download WTL from here: https://sourceforge.net/projects/wtl/ to [WTL_HOME]
2) Goto [WTL_HOME]/Samples/TabBrowser
3) clang-cl -c -D "_UNICODE" -D "UNICODE" -I ../../include -w TabBrowser.cpp
>>>
or download and compile code below ( includes were reduced a lot - see small
reproducer):
//these headers are from WTL library (they are not included inside VS package)
#include <atlbase.h>
#include <atlapp.h>
#include <atlctl.h>
#include <atlctrls.h>
#include <atlctrlx.h>
using:
clang-cl -c -D "_UNICODE" -D "UNICODE" -I ../include -w test.cpp
==========Small Reproducer=============
//no need to download anything - these headers are from MSVS
#include <basetsd.h>
#include <atlbase.h>
#include <atlwin.h>
class CPaintDC{
public:
HWND m_hWnd; // this name is unknown in OnPaint function
CPaintDC(HWND hWnd){}
};
template <class TBase>
class CButtonT : public TBase{
public:
CButtonT() {}
};
typedef CButtonT<ATL::CWindow> CButton;
template <class T, class TBase = CButton>
class CBitmapButtonImpl : public ATL::CWindowImpl < T >{
public:
CBitmapButtonImpl() {}
int ProcessWindowMessage(HWND hWnd, unsigned int uMsg, UINT_PTR
wParam, LONG_PTR lParam, LRESULT& lResult, DWORD dwMsgMapID = 0){
OnPaint(uMsg, wParam, lParam);
return 0;
}
void OnPaint(unsigned int, WPARAM wParam, LPARAM){
CPaintDC dc(m_hWnd); // ERROR appears here, note
also, that compiler incorrectly parse a statement and thinks that m_hWnd is a
type <<<
}
};
class CBitmapButton : public CBitmapButtonImpl < CBitmapButton >{
public:
CBitmapButton() : CBitmapButtonImpl<CBitmapButton>() {}
};
===============Error==================
>>>clang-cl:
test.cpp(30,40) : error: unknown type name 'm_hWnd'
CPaintDC dc(m_hWnd);
^
test.cpp(37,14) : note: in instantiation of member function
'CBitmapButtonImpl<CBitmapButton,
CButtonT<ATL::CWindow> >::ProcessWindowMessage' requested here
CBitmapButton() : CBitmapButtonImpl<CBitmapButton>() {}
^
test.cpp(30,39) : warning: parentheses were disambiguated as a function
declaration [-Wvexing-parse]
CPaintDC dc(m_hWnd);
^~~~~~~~
test.cpp(30,40) : note: add a pair of parentheses to declare a variable
CPaintDC dc(m_hWnd);
>>>msvc: no diagnostics
Andrey Kuleshov
======
Software Engineer
Intel Compiler Team
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