clang/test/Modules/implicit-module-header-maps.cpp

   1 // UNSUPPORTED: system-windows
   2 // RUN: rm -rf %t
   3 // RUN: split-file %s %t
   4 // RUN: cd %t
   5 //
   6 // RUN: %hmaptool write a.hmap.json hmap
   7 //
   8 // RUN: %clang -Rmodule-build -fmodules -fimplicit-modules -fimplicit-module-maps -fmodule-map-file=module.modulemap -fsyntax-only -I hmap -fmodules-cache-path=%t test.cpp
   9 //
  10 // RUN: cd %T
  11 // RUN: rm -rf %t
  12 // RUN: split-file %s %t
  13 // RUN: cd %t
  14 //
  15 // RUN: sed -e "s|OUTPUTS_DIR|%t|g" b.hmap.json > hmap.json
  16 // RUN: %hmaptool write hmap.json hmap
  17 //
  18 // RUN: %clang -Rmodule-build -fmodules -fimplicit-modules -fimplicit-module-maps -fmodule-map-file=module.modulemap -fsyntax-only -I hmap -fmodules-cache-path=%t test.cpp
  19
  20 //--- After/Mapping.h
  21 #ifdef FOO
  22 #error foo
  23 #endif
  24
  25 //--- a.hmap.json
  26 {
  27   "mappings" :
  28     {
  29      "Before/Mapping.h" : "After/Mapping.h",
  30      "After/Mapping.h" : "After/Mapping.h"
  31     }
  32 }
  33
  34 //--- b.hmap.json
  35 {
  36   "mappings" :
  37     {
  38      "Before/Mapping.h" : "OUTPUTS_DIR/After/Mapping.h"
  39     }
  40 }
  41
  42 //--- module.modulemap
  43 module a {
  44   header "After/Mapping.h"
  45 }
  46
  47
  48 //--- test.cpp
  49 #define FOO
  50 // This include will fail if:
  51 // 1) modules are't used, as the `FOO` define will propagate into the included
  52 //    header and trip a `#error`, or
  53 // 2) header maps aren't used, as the header name doesn't exist and relies on
  54 //    the header map to remap it to the real header.
  55 #include "Before/Mapping.h"