clang/test/Parser/static_assert.c

   1 // RUN: %clang_cc1 -fsyntax-only -std=c17 -DTEST_SPELLING -Wc2x-compat -verify=c17 %s
   2 // RUN: %clang_cc1 -fsyntax-only -std=c17 -DTEST_SPELLING -fms-compatibility -verify=c17-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, ""); // c17-warning {{'static_assert' is a keyword in C23}} \
  19                       // c17-error {{expected parameter declarator}} \
  20                       // c17-error {{expected ')'}} \
  21                       // c17-note {{to match this '('}} \
  22                       // c17-error {{type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int}} \
  23                       // c17-ms-warning {{use of 'static_assert' without inclusion of <assert.h> is a Microsoft extension}}
  24
  25 #endif
  26
  27 // We support _Static_assert as an extension in older C modes and in all C++
  28 // modes, but only as a pedantic warning.
  29 _Static_assert(1, ""); // c99-pedantic-warning {{'_Static_assert' is a C11 extension}} \
  30                        // cxx17-pedantic-warning {{'_Static_assert' is a C11 extension}} \
  31                        // cxx98-pedantic-warning {{'_Static_assert' is a C11 extension}}
  32
  33 // _Static_assert without a message has more complex diagnostic logic:
  34 //   * In C++17 or C2x mode, it's supported by default.
  35 //   * But there is a special compat warning flag to warn about portability to
  36 //     older standards.
  37 //   * In older standard pedantic modes, warn about supporting without a
  38 //     message as an extension.
  39 _Static_assert(1); // c99-pedantic-warning {{'_Static_assert' with no message is a C23 extension}} \
  40                    // c99-warning {{'_Static_assert' with no message is a C23 extension}} \
  41                    // cxx98-pedantic-warning {{'static_assert' with no message is a C++17 extension}} \
  42                    // cxx98-warning {{'static_assert' with no message is a C++17 extension}} \
  43                    // c2x-compat-warning {{'_Static_assert' with no message is incompatible with C standards before C23}} \
  44                    // cxx17-compat-warning {{'static_assert' with no message is incompatible with C++ standards before C++17}} \
  45                    // c99-pedantic-warning {{'_Static_assert' is a C11 extension}} \
  46                    // cxx17-pedantic-warning {{'_Static_assert' is a C11 extension}} \
  47                    // cxx98-pedantic-warning {{'_Static_assert' is a C11 extension}} \
  48                    // c17-warning {{'_Static_assert' with no message is a C23 extension}} \
  49                    // c17-ms-warning {{'_Static_assert' with no message is a C23 extension}}