[clang][Interp] Fix initializing PredefinedExprs

Add support of Windows Trace Logging macros

Consider the following code:

#include <windows.h>
#include <TraceLoggingActivity.h>
#include <TraceLoggingProvider.h>
#include <winmeta.h

Add support of Windows Trace Logging macros

Consider the following code:

#include <windows.h>
#include <TraceLoggingActivity.h>
#include <TraceLoggingProvider.h>
#include <winmeta.h>

TRACELOGGING_DEFINE_PROVIDER(
g_hMyComponentProvider,
"SimpleTraceLoggingProvider",
// {0205c616-cf97-5c11-9756-56a2cee02ca7}
(0x0205c616,0xcf97,0x5c11,0x97,0x56,0x56,0xa2,0xce,0xe0,0x2c,0xa7));

void test()
{
TraceLoggingFunction(g_hMyComponentProvider);
}

int main()
{
TraceLoggingRegister(g_hMyComponentProvider);
test();
TraceLoggingUnregister(g_hMyComponentProvider);
}

It compiles with MSVC, but clang-cl reports an error:

C:\Program Files (x86)\Windows Kits\10\\include\10.0.22621.0\\shared/TraceLoggingActivity.h(377,30): note: expanded from macro '_tlgThisFunctionName'
#define _tlgThisFunctionName __FUNCTION__
^
.\tl.cpp(14,5): error: cannot initialize an array element of type 'char' with an lvalue of type 'const char[5]'
TraceLoggingFunction(g_hMyComponentProvider);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The second commit is not needed to support above code, however, during isolated tests in ms_predefined_expr.cpp
I found that MSVC accepts code with constexpr, whereas clang-cl does not.
I see that in most places PredefinedExpr is supported in constant evaluation, so I didn't wrap my code with ``if(MicrosoftExt)``.

Reviewed By: cor3ntin

Differential Revision: https://reviews.llvm.org/D158591

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Add argument to static_assert() call to work with compilers that default to c++14 or earlier.

Enable concatenation of predefined identifiers

Predefined identifiers like __FUNCTION__ are treated like string
literals in MSVC, which means they can be concatentated together with
an adjacent stri

Enable concatenation of predefined identifiers

Predefined identifiers like __FUNCTION__ are treated like string
literals in MSVC, which means they can be concatentated together with
an adjacent string literal. Clang now supports this behavior as well,
in Microsoft extensions mode.

Fixes https://github.com/llvm/llvm-project/issues/63563
Differential Revision: https://reviews.llvm.org/D153914

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Reland [clang] Make predefined expressions string literals under -fms-extensions

MSVC makes these string literals [1][2].

[1] https://godbolt.org/z/6vnTzbExx
[2] https://learn.microsoft.com/en-us/c

Reland [clang] Make predefined expressions string literals under -fms-extensions

MSVC makes these string literals [1][2].

[1] https://godbolt.org/z/6vnTzbExx
[2] https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros?view=msvc-170

Fixes #114

Initial commit didn't check if there was a function name when stepping through expressions ignoring parens.

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D146764

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[clang] Make predefined expressions string literals under -fms-extensions

MSVC makes these string literals [1][2].

[1] https://godbolt.org/z/6vnTzbExx
[2] https://learn.microsoft.com/en-us/cpp/prep

[clang] Make predefined expressions string literals under -fms-extensions

MSVC makes these string literals [1][2].

[1] https://godbolt.org/z/6vnTzbExx
[2] https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros?view=msvc-170

Fixes #114

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D146764

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