llvm-project/clang/test/Index/Inputs/preamble_macro_template.h

#define STATIC_CAST static_cast

template<typename T>
void foo(T *p) {
  (void)STATIC_CAST<T*>(0);
}
Revamp the SourceManager to separate the representation of parsed source locations from source locations loaded from an AST/PCH file. Previously, loading an AST/PCH file involved carefully pre-allocating space at the beginning of the source manager for the source locations and FileIDs that correspond to the prefix, and then appending the source locations/FileIDs used for parsing the remaining translation unit. This design forced us into loading PCH files early, as a prefix, whic has become a rather significant limitation. This patch splits the SourceManager space into two parts: for source location "addresses", the lower values (growing upward) are used to describe parsed code, while upper values (growing downward) are used for source locations loaded from AST/PCH files. Similarly, positive FileIDs are used to describe parsed code while negative FileIDs are used to file/macro locations loaded from AST/PCH files. As a result, we can load PCH/AST files even during parsing, making various improvemnts in the future possible, e.g., teaching #include <foo.h> to look for and load <foo.h.gch> if it happens to be already available. This patch was originally written by Sebastian Redl, then brought forward to the modern age by Jonathan Turner, and finally polished/finished by me to be committed. llvm-svn: 135484 2011-07-20 00:10:42 +08:00			`#define STATIC_CAST static_cast`

			`template<typename T>`
			`void foo(T *p) {`
			`(void)STATIC_CAST<T*>(0);`
			`}`