llvm-capstone/clang/test/Preprocessor/pp-modules.c
Richard Smith c51c38b4ec Add pragma to perform module import and use it in -E output.
Many of our supported configurations support modules but do not have any
first-class syntax to perform a module import. This leaves us with a problem:
there is no way to represent the expansion of a #include that imports a module
in the -E output for such languages. (We don't want to just leave it as a
#include because that requires the consumer of the preprocessed source to have
the same file system layout and include paths as the creator.)

This patch adds a new pragma:

  #pragma clang module import MODULE.NAME.HERE

that imports a module, and changes -E and -frewrite-includes to use it when
rewriting a #include that maps to a module import. We don't make any attempt
to use a native language syntax import if one exists, to get more consistent
output. (If in the future, @import and #include have different semantics in
some way, the pragma will track the #include semantics.)

llvm-svn: 301725
2017-04-29 00:34:47 +00:00

16 lines
717 B
C

// RUN: rm -rf %t
// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -x objective-c %s -F %S/../Modules/Inputs -E -o - | FileCheck %s
// CHECK: int bar();
int bar();
// CHECK: #pragma clang module import Module /* clang -E: implicit import for #include <Module/Module.h> */{{$}}
#include <Module/Module.h>
// CHECK: int foo();
int foo();
// CHECK: #pragma clang module import Module /* clang -E: implicit import for #include <Module/Module.h> */{{$}}
#include <Module/Module.h>
#include "pp-modules.h" // CHECK: # 1 "{{.*}}pp-modules.h" 1
// CHECK: #pragma clang module import Module /* clang -E: implicit import for #include <Module/Module.h> */{{$}}
// CHECK: # 14 "{{.*}}pp-modules.c" 2