clang/test/Parser/c23-constexpr.c

   1 // RUN: %clang_cc1 -fsyntax-only -verify=c23 -std=c23 %s -Wpre-c2x-compat
   2 // RUN: %clang_cc1 -fsyntax-only -verify=c17 -std=c17 %s
   3
   4 constexpr int a = 0; // c17-error {{unknown type name 'constexpr'}} \
   5                         c23-warning {{'constexpr' is incompatible with C standards before C23}}
   6
   7 void func(int array[constexpr]); // c23-error {{expected expression}} \
   8                                  // c17-error {{use of undeclared}}
   9
  10 _Atomic constexpr int b = 0; // c23-error {{constexpr variable cannot have type 'const _Atomic(int)'}} \
  11                              // c23-warning {{'constexpr' is incompatible with C standards before C23}} \
  12                              // c17-error {{unknown type name 'constexpr'}}
  13
  14 int static constexpr c = 1; // c17-error {{expected ';' after top level declarator}} \
  15                             // c23-warning {{'constexpr' is incompatible with C standards before C23}}