llvm-project/clang/test/Modules/Inputs/declare-use/c.h

#ifndef C_H
#define C_H
#include "a.h"
#include "b.h"
const int c = a+b;
#endif
Module use declarations (II) Review: http://llvm-reviews.chandlerc.com/D1546. I have picked up this patch form Lawrence (http://llvm-reviews.chandlerc.com/D1063) and did a few changes. From the original change description (updated as appropriate): This patch adds a check that ensures that modules only use modules they have so declared. To this end, it adds a statement on intended module use to the module.map grammar: use module-id A module can then only use headers from other modules if it 'uses' them. This enforcement is off by default, but may be turned on with the new option -fmodules-decluse. When enforcing the module semantics, we also need to consider a source file part of a module. This is achieved with a compiler option -fmodule-name=<module-id>. The compiler at present only applies restrictions to the module directly being built. llvm-svn: 191283 2013-09-24 17:14:14 +08:00			`#ifndef C_H`
			`#define C_H`
			`#include "a.h"`
			`#include "b.h"`
			`const int c = a+b;`
			`#endif`