clang/test/Modules/diag-pragma.cpp

   1 // RUN: rm -rf %t
   2 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -emit-module -fmodules-cache-path=%t -fmodule-name=diag_pragma -x c++ %S/Inputs/module.modulemap -std=c++20
   3 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -verify -fmodules-cache-path=%t -I %S/Inputs %s -std=c++20
   4 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -emit-module -fmodule-name=diag_pragma -x c++ %S/Inputs/module.modulemap -std=c++20 -o %t/explicit.pcm -Werror=string-plus-int
   5 // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -verify -fmodules-cache-path=%t -I %S/Inputs %s -std=c++20 -DEXPLICIT_FLAG -fmodule-file=%t/explicit.pcm
   6
   7 #include "diag_pragma.h"
   8
   9 int foo(int x) {
  10   // Diagnostics from templates in the module follow the diagnostic state from
  11   // when the module was built.
  12 #ifdef EXPLICIT_FLAG
  13   // expected-error@diag_pragma.h:7 {{adding 'int' to a string}}
  14 #else
  15   // expected-warning@diag_pragma.h:7 {{adding 'int' to a string}}
  16 #endif
  17   // expected-note@diag_pragma.h:7 {{use array indexing}}
  18   f(0); // expected-note {{instantiation of}}
  19
  20   g(0); // ok, warning was ignored when building module
  21
  22   // Diagnostics from this source file ignore the diagnostic state from the
  23   // module.
  24   void("foo" + x); // expected-warning {{adding 'int' to a string}}
  25   // expected-note@-1 {{use array indexing}}
  26
  27 #pragma clang diagnostic ignored "-Wstring-plus-int"
  28
  29   // Diagnostics from the module ignore diagnostic state changes from this
  30   // source file.
  31 #ifdef EXPLICIT_FLAG
  32   // expected-error@diag_pragma.h:7 {{adding 'long' to a string}}
  33 #else
  34   // expected-warning@diag_pragma.h:7 {{adding 'long' to a string}}
  35 #endif
  36   // expected-note@diag_pragma.h:7 {{use array indexing}}
  37   f(0L); // expected-note {{instantiation of}}
  38
  39   g(0L);
  40
  41   void("bar" + x);
  42
  43   if (x = DIAG_PRAGMA_MACRO) // expected-warning {{using the result of an assignment as a condition without parentheses}} \
  44                              // expected-note {{place parentheses}} expected-note {{use '=='}}
  45     return 0;
  46   return 1;
  47 }