clang/test/Parser/static_assert.c

   1 // RUN: %clang_cc1 -fsyntax-only -std=c2x -DTEST_SPELLING -verify=c2x %s
   2 // RUN: %clang_cc1 -fsyntax-only -std=c2x -DTEST_SPELLING -fms-compatibility -verify=c2x-ms %s
   3 // RUN: %clang_cc1 -fsyntax-only -std=c2x -Wpre-c2x-compat -verify=c2x-compat %s
   4 // RUN: %clang_cc1 -fsyntax-only -std=c99 -verify=c99 %s
   5 // RUN: %clang_cc1 -fsyntax-only -std=c99 -pedantic -verify=c99-pedantic %s
   6 // RUN: %clang_cc1 -fsyntax-only -std=c++17 -verify=cxx17 -x c++ %s
   7 // RUN: %clang_cc1 -fsyntax-only -std=c++17 -pedantic -verify=cxx17-pedantic -x c++ %s
   8 // RUN: %clang_cc1 -fsyntax-only -std=c++98 -verify=cxx98 -x c++ %s
   9 // RUN: %clang_cc1 -fsyntax-only -std=c++98 -pedantic -verify=cxx98-pedantic -x c++ %s
  10 // RUN: %clang_cc1 -fsyntax-only -std=c++17 -Wpre-c++17-compat -verify=cxx17-compat -x c++ %s
  11
  12 // cxx17-no-diagnostics
  13
  14 #ifdef TEST_SPELLING
  15 // Only test the C++ spelling in C mode in some of the tests, to reduce the
  16 // amount of diagnostics to have to check. This spelling is allowed in MS-
  17 // compatibility mode in C, but otherwise produces errors.
  18 static_assert(1, ""); // c2x-error {{expected parameter declarator}} \
  19                       // c2x-error {{expected ')'}} \
  20                       // c2x-note {{to match this '('}} \
  21                       // c2x-warning {{type specifier missing, defaults to 'int'}} \
  22                       // c2x-ms-warning {{use of 'static_assert' without inclusion of <assert.h> is a Microsoft extension}}
  23 #endif
  24
  25 // We support _Static_assert as an extension in older C modes and in all C++
  26 // modes, but only as a pedantic warning.
  27 _Static_assert(1, ""); // c99-pedantic-warning {{'_Static_assert' is a C11 extension}} \
  28                        // cxx17-pedantic-warning {{'_Static_assert' is a C11 extension}} \
  29                        // cxx98-pedantic-warning {{'_Static_assert' is a C11 extension}}
  30
  31 // _Static_assert without a message has more complex diagnostic logic:
  32 //   * In C++17 or C2x mode, it's supported by default.
  33 //   * But there is a special compat warning flag to warn about portability to
  34 //     older standards.
  35 //   * In older standard pedantic modes, warn about supporting without a
  36 //     message as an extension.
  37 _Static_assert(1); // c99-pedantic-warning {{'_Static_assert' with no message is a C2x extension}} \
  38                    // c99-warning {{'_Static_assert' with no message is a C2x extension}} \
  39                    // cxx98-pedantic-warning {{'static_assert' with no message is a C++17 extension}} \
  40                    // cxx98-warning {{'static_assert' with no message is a C++17 extension}} \
  41                    // c2x-compat-warning {{'_Static_assert' with no message is incompatible with C standards before C2x}} \
  42                    // cxx17-compat-warning {{'static_assert' with no message is incompatible with C++ standards before C++17}} \
  43                    // c99-pedantic-warning {{'_Static_assert' is a C11 extension}} \
  44                    // cxx17-pedantic-warning {{'_Static_assert' is a C11 extension}} \
  45                    // cxx98-pedantic-warning {{'_Static_assert' is a C11 extension}}