llvm-project/clang/test/Modules/Inputs/macros_left.h

#include "macros_top.h"
#define LEFT unsigned long

#undef TOP_LEFT_UNDEF


#define LEFT_RIGHT_IDENTICAL int
#define LEFT_RIGHT_DIFFERENT float
#define LEFT_RIGHT_DIFFERENT2 float
#define LEFT_RIGHT_DIFFERENT3 float
Rework the (de-)serialization of macros, as stored in MacroInfo*. Instead of simply dumping an offset into the current file, give each macro definition a proper ID with all of the standard modules-remapping facilities. Additionally, when a macro is modified in a subsequent AST file (e.g., #undef'ing a macro loaded from another module or from a precompiled header), provide a macro update record rather than rewriting the entire macro definition. This gives us greater consistency with the way we handle declarations, and ties together macro definitions much more cleanly. Note that we're still not actually deserializing macro history (we never were), but it's far easy to do properly now. llvm-svn: 165560 2012-10-10 07:05:51 +08:00			`#include "macros_top.h"`
			`#define LEFT unsigned long`

			`#undef TOP_LEFT_UNDEF`

Deserialize macro history when we deserialize an identifier that has macro history. When deserializing macro history, we arrange history such that the macros that have definitions (that haven't been #undef'd) and are visible come at the beginning of the list, which is what the preprocessor and other clients of Preprocessor::getMacroInfo() expect. If additional macro definitions become visible later, they'll be moved toward the front of the list. Note that it's possible to have ambiguities, but we don't diagnose them yet. There is a partially-implemented design decision here that, if a particular identifier has been defined or #undef'd within the translation unit, that definition (or #undef) hides any macro definitions that come from imported modules. There's still a little work to do to ensure that the right #undef'ing happens. Additionally, we'll need to scope the update records for #undefs, so they only kick in when the submodule containing that update record becomes visible. llvm-svn: 165682 2012-10-11 08:46:49 +08:00


			`#define LEFT_RIGHT_IDENTICAL int`
			`#define LEFT_RIGHT_DIFFERENT float`
			`#define LEFT_RIGHT_DIFFERENT2 float`
			`#define LEFT_RIGHT_DIFFERENT3 float`