clang/test/Modules/cxx20-hu-06.cpp

   1 // Test check that consuming -E -fdirectives-only output produces the expected
   2 // header unit.
   3
   4 // RUN: rm -rf %t
   5 // RUN: mkdir -p %t
   6 // RUN: split-file %s %t
   7 // RUN: cd %t
   8
   9 // RUN: %clang_cc1 -std=c++20 -E -fdirectives-only -xc++-user-header hu-01.h \
  10 // RUN: -o hu-01.iih
  11
  12 // RUN: %clang_cc1 -std=c++20 -emit-header-unit \
  13 // RUN: -xc++-user-header-cpp-output hu-01.iih -o hu-01.pcm
  14
  15 // RUN: %clang_cc1 -std=c++20 -emit-header-unit -xc++-user-header hu-02.h \
  16 // RUN: -DFOO -fmodule-file=hu-01.pcm -o hu-02.pcm -Rmodule-import 2>&1 | \
  17 // RUN: FileCheck --check-prefix=CHECK-IMP %s -DTDIR=%t
  18
  19 //--- hu-01.h
  20 #ifndef __GUARD
  21 #define __GUARD
  22
  23 int baz(int);
  24 #define FORTYTWO 42
  25
  26 #define SHOULD_NOT_BE_DEFINED -1
  27 #undef SHOULD_NOT_BE_DEFINED
  28
  29 #endif // __GUARD
  30 // expected-no-diagnostics
  31
  32 //--- hu-02.h
  33 export import "hu-01.h";
  34 #if !defined(FORTYTWO) || FORTYTWO != 42
  35 #error FORTYTWO missing in hu-02
  36 #endif
  37
  38 #ifndef __GUARD
  39 #error __GUARD missing in hu-02
  40 #endif
  41
  42 #ifdef SHOULD_NOT_BE_DEFINED
  43 #error SHOULD_NOT_BE_DEFINED is visible
  44 #endif
  45
  46 // Make sure that we have not discarded macros from the builtin file.
  47 #ifndef __cplusplus
  48 #error we dropped a defined macro
  49 #endif
  50
  51 #define KAP 6174
  52
  53 #ifdef FOO
  54 #define FOO_BRANCH(X) (X) + 1
  55 inline int foo(int x) {
  56   if (x == FORTYTWO)
  57     return FOO_BRANCH(x);
  58   return FORTYTWO;
  59 }
  60 #else
  61 #define BAR_BRANCH(X) (X) + 2
  62 inline int bar(int x) {
  63   if (x == FORTYTWO)
  64     return BAR_BRANCH(x);
  65   return FORTYTWO;
  66 }
  67 #endif
  68 // CHECK-IMP: remark: importing module '.{{/|\\\\?}}hu-01.h' from 'hu-01.pcm'