clang/test/Headers/stddef.c

   1 // RUN: rm -fR %t
   2 // RUN: %clang_cc1 -fsyntax-only -verify=c99 -std=c99 %s
   3 // RUN: %clang_cc1 -fsyntax-only -verify=c11 -std=c11 %s
   4 // RUN: %clang_cc1 -fsyntax-only -verify=c23 -std=c23 %s
   5 // RUN: %clang_cc1 -fsyntax-only -verify=c99-modules -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -std=c99 %s
   6 // RUN: %clang_cc1 -fsyntax-only -verify=c11-modules -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -std=c11 %s
   7 // RUN: %clang_cc1 -fsyntax-only -verify=c23-modules -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -std=c23 %s
   8
   9 struct astruct { char member; };
  10
  11 ptrdiff_t p0; // c99-error{{unknown type name 'ptrdiff_t'}} c11-error{{unknown type}} c23-error{{unknown type}} \
  12                  c99-modules-error{{unknown type}} c11-modules-error{{unknown type}} c23-modules-error{{unknown type}}
  13 size_t s0; // c99-error{{unknown type name 'size_t'}} c11-error{{unknown type}} c23-error{{unknown type}} \
  14               c99-modules-error{{unknown type}} c11-modules-error{{unknown type}} c23-modules-error{{unknown type}}
  15 rsize_t r0; // c99-error{{unknown type name 'rsize_t'}} c11-error{{unknown type}} c23-error{{unknown type}} \
  16                c99-modules-error{{unknown type}} c11-modules-error{{unknown type}} c23-modules-error{{unknown type}}
  17 wchar_t wc0; // c99-error{{unknown type name 'wchar_t'}} c11-error{{unknown type}} c23-error{{unknown type}} \
  18                 c99-modules-error{{unknown type}} c11-modules-error{{unknown type}} c23-modules-error{{unknown type}}
  19 void *v0 = NULL; // c99-error{{use of undeclared identifier 'NULL'}} c11-error{{undeclared identifier}} c23-error{{undeclared identifier}} \
  20                     c99-modules-error{{undeclared identifier}} c11-modules-error{{undeclared identifier}} c23-modules-error{{undeclared identifier}}
  21 nullptr_t n0; // c99-error{{unknown type name 'nullptr_t'}} c11-error{{unknown type}} c23-error{{unknown type}} \
  22                  c99-modules-error{{unknown type}} c11-modules-error{{unknown type}} c23-modules-error{{unknown type}}
  23 static void f0(void) { unreachable(); } // c99-error{{call to undeclared function 'unreachable'}} c11-error{{undeclared function}} c23-error{{undeclared identifier}} \
  24                                            c99-modules-error{{undeclared function}} c11-modules-error{{undeclared function}} c23-modules-error{{undeclared identifier}}
  25 max_align_t m0; // c99-error{{unknown type name 'max_align_t'}} c11-error{{unknown type}} c23-error{{unknown type}} \
  26                    c99-modules-error{{unknown type}} c11-modules-error{{unknown type}} c23-modules-error{{unknown type}}
  27 size_t o0 = offsetof(struct astruct, member); // c99-error{{unknown type name 'size_t'}} c99-error{{call to undeclared function 'offsetof'}} c99-error{{expected expression}} c99-error{{use of undeclared identifier 'member'}} \
  28                                                  c11-error{{unknown type}} c11-error{{undeclared function}} c11-error{{expected expression}} c11-error{{undeclared identifier}} \
  29                                                  c23-error{{unknown type}} c23-error{{undeclared identifier}} c23-error{{expected expression}} c23-error{{undeclared identifier}} \
  30                                                  c99-modules-error{{unknown type}} c99-modules-error{{undeclared function}} c99-modules-error{{expected expression}} c99-modules-error{{undeclared identifier}} \
  31                                                  c11-modules-error{{unknown type}} c11-modules-error{{undeclared function}} c11-modules-error{{expected expression}} c11-modules-error{{undeclared identifier}} \
  32                                                  c23-modules-error{{unknown type}} c23-modules-error{{undeclared identifier}} c23-modules-error{{expected expression}} c23-modules-error{{undeclared identifier}}
  33 wint_t wi0; // c99-error{{unknown type name 'wint_t'}} c11-error{{unknown type}} c23-error{{unknown type}} \
  34                c99-modules-error{{unknown type name 'wint_t'}} c11-modules-error{{unknown type}} c23-modules-error{{unknown type}}
  35
  36 #include <stddef.h>
  37
  38 ptrdiff_t p1;
  39 size_t s1;
  40 rsize_t r1; // c99-error{{unknown type}} c11-error{{unknown type}} c23-error{{unknown type}} \
  41                c99-note@__stddef_size_t.h:*{{'size_t' declared here}} c11-note@__stddef_size_t.h:*{{'size_t' declared here}} c23-note@__stddef_size_t.h:*{{'size_t' declared here}} \
  42                c99-modules-error{{'rsize_t' must be declared before it is used}} c11-modules-error{{must be declared}} c23-modules-error{{must be declared}} \
  43                c99-modules-note@__stddef_rsize_t.h:*{{declaration here is not visible}} c11-modules-note@__stddef_rsize_t.h:*{{declaration here is not visible}} c23-modules-note@__stddef_rsize_t.h:*{{declaration here is not visible}}
  44 wchar_t wc1;
  45 void *v1 = NULL;
  46 nullptr_t n1; // c99-error{{unknown type}} c11-error{{unknown type}} \
  47                  c99-modules-error{{unknown type}} c11-modules-error{{unknown type}}
  48 static void f1(void) { unreachable(); } // c99-error{{undeclared function}} c11-error{{undeclared function}} \
  49                                            c99-modules-error{{undeclared function}} c11-modules-error{{undeclared function}}
  50 max_align_t m1; // c99-error{{unknown type}} c99-modules-error{{'max_align_t' must be declared before it is used}} \
  51                    c99-modules-note@__stddef_max_align_t.h:*{{declaration here is not visible}}
  52 size_t o1 = offsetof(struct astruct, member);
  53 wint_t wi1; // c99-error{{unknown type}} c11-error{{unknown type}} c23-error{{unknown type}} \
  54                c99-modules-error{{unknown type}} c11-modules-error{{unknown type}} c23-modules-error{{unknown type}}
  55
  56 // rsize_t needs to be opted into via __STDC_WANT_LIB_EXT1__ >= 1.
  57 #define __STDC_WANT_LIB_EXT1__ 1
  58 #include <stddef.h>
  59 ptrdiff_t p2;
  60 size_t s2;
  61 rsize_t r2;
  62 wchar_t wc2;
  63 void *v2 = NULL;
  64 nullptr_t n2; // c99-error{{unknown type}} c11-error{{unknown type}} \
  65                  c99-modules-error{{unknown type}} c11-modules-error{{unknown type}}
  66 static void f2(void) { unreachable(); } // c99-error{{undeclared function}} c11-error{{undeclared function}} \
  67                                            c99-modules-error{{undeclared function}} c11-modules-error{{undeclared function}}
  68 max_align_t m2; // c99-error{{unknown type}}
  69 size_t o2 = offsetof(struct astruct, member);
  70 wint_t wi2; // c99-error{{unknown type}} c11-error{{unknown type}} c23-error{{unknown type}} \
  71                c99-modules-error{{unknown type}} c11-modules-error{{unknown type}} c23-modules-error{{unknown type}}
  72
  73 // m2 and wi2 don't generate errors in modules, the "must be declared before used"
  74 // errors are only emitted the first time the known-but-not-visible type is seen.