Introduce support for a simple module import declaration, which
loads the named module. The syntax itself is intentionally hideous and
will be replaced at some later point with something more
palatable. For now, we're focusing on the semantics:
- Module imports are handled first by the preprocessor (to get macro
definitions) and then the same tokens are also handled by the parser
(to get declarations). If both happen (as in normal compilation),
the second one is redundant, because we currently have no way to
hide macros or declarations when loading a module. Chris gets credit
for this mad-but-workable scheme.
- The Preprocessor now holds on to a reference to a module loader,
which is responsible for loading named modules. CompilerInstance is
the only important module loader: it now knows how to create and
wire up an AST reader on demand to actually perform the module load.
- We search for modules in the include path, using the module name
with the suffix ".pcm" (precompiled module) for the file name. This
is a temporary hack; we hope to improve the situation in the
future.
llvm-svn: 138679
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 9f43aa2..8f08af4 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -38,6 +38,7 @@
// FIXME: layering (ideally, Sema shouldn't be dependent on Lex API's)
#include "clang/Lex/Preprocessor.h"
#include "clang/Lex/HeaderSearch.h"
+#include "clang/Lex/ModuleLoader.h"
#include "llvm/ADT/Triple.h"
#include <algorithm>
#include <cstring>
@@ -9294,6 +9295,19 @@
return New;
}
+DeclResult Sema::ActOnModuleImport(SourceLocation ImportLoc,
+ IdentifierInfo &ModuleName,
+ SourceLocation ModuleNameLoc) {
+ ModuleKey Module = PP.getModuleLoader().loadModule(ImportLoc,
+ ModuleName, ModuleNameLoc);
+ if (!Module)
+ return true;
+
+ // FIXME: Actually create a declaration to describe the module import.
+ (void)Module;
+ return DeclResult((Decl *)0);
+}
+
void Sema::ActOnPragmaWeakID(IdentifierInfo* Name,
SourceLocation PragmaLoc,
SourceLocation NameLoc) {