clang/test/Preprocessor/ucn-allowed-chars.c

   1 // RUN: %clang_cc1 %s -fsyntax-only -std=c99 -verify
   2 // RUN: %clang_cc1 %s -fsyntax-only -std=c2x -Wc99-compat -verify
   3 // RUN: %clang_cc1 %s -fsyntax-only -std=c11 -Wc99-compat -verify
   4 // RUN: %clang_cc1 %s -fsyntax-only -x c++ -std=c++03 -Wc++11-compat -verify
   5 // RUN: %clang_cc1 %s -fsyntax-only -x c++ -std=c++11 -Wc++98-compat -verify
   6
   7 // Identifier characters
   8 extern char a\u01F6; // C11, C++11
   9 extern char a\u00AA; // C99, C11, C++11
  10 extern char a\u0384; // C++03, C11, C++11
  11 extern char a\u0E50; // C99, C++03, C11, C++11
  12 extern char a\uFFFF; // none
  13
  14
  15
  16
  17 // Identifier initial characters
  18 extern char \u0E50; // C++03, C11, C++11
  19 extern char \u0300; // disallowed in C99/C++03
  20 extern char \u0D61; // C99, C11, C++03, C++11
  21
  22
  23
  24
  25
  26
  27
  28 // Disallowed everywhere
  29 #define A \u0000 // expected-error{{control character}}
  30 #define B \u001F // expected-error{{control character}}
  31 #define C \u007F // expected-error{{control character}}
  32 #define D \u009F // expected-error{{control character}}
  33 #define E \uD800 // C++03 allows UCNs representing surrogate characters!
  34
  35
  36
  37
  38
  39
  40 #if __cplusplus
  41 // expected-error@10 {{character <U+0384> not allowed in an identifier}}
  42 // expected-error@12 {{character <U+FFFF> not allowed in an identifier}}
  43 // expected-error@18 {{expected unqualified-id}}
  44 # if __cplusplus >= 201103L
  45 // C++11
  46 // expected-error@19 {{expected unqualified-id}}
  47 // expected-error@33 {{invalid universal character}}
  48
  49 # else
  50 // C++03
  51 // expected-error@19 {{expected unqualified-id}}
  52 // expected-warning@33 {{universal character name refers to a surrogate character}}
  53
  54 # endif
  55 #else
  56 # if __STDC_VERSION__ >= 202311L
  57 // C23
  58 // expected-warning@8 {{using this character in an identifier is incompatible with C99}}
  59 // expected-error@10 {{character <U+0384> not allowed in an identifier}}
  60 // expected-error@12 {{character <U+FFFF> not allowed in an identifier}}
  61 // expected-error@18 {{expected identifier}}
  62 // expected-error@19 {{expected identifier}}
  63 // expected-error@33 {{invalid universal character}}
  64 # elif __STDC_VERSION__ >= 201112L
  65 // C11
  66 // expected-warning@8 {{using this character in an identifier is incompatible with C99}}
  67 // expected-warning@10 {{using this character in an identifier is incompatible with C99}}
  68 // expected-error@12 {{character <U+FFFF> not allowed in an identifier}}
  69 // expected-warning@18 {{starting an identifier with this character is incompatible with C99}}
  70 // expected-error@19 {{expected identifier}}
  71 // expected-error@33 {{invalid universal character}}
  72
  73 # else
  74 // C99
  75 // expected-error@8 {{not allowed in an identifier}}
  76 // expected-error@10 {{not allowed in an identifier}}
  77 // expected-error@12 {{not allowed in an identifier}}
  78 // expected-error@18 {{expected identifier}}
  79 // expected-error@19 {{expected identifier}}
  80 // expected-error@33 {{invalid universal character}}
  81
  82 # endif
  83 #endif
  84
  85 #define AAA\u0024 // expected-error {{character '$' cannot be specified by a universal character name}} \
  86                   // expected-warning {{whitespace}}
  87 #define AAB\u0040 // expected-error {{character '@' cannot be specified by a universal character name}} \
  88                   // expected-warning {{whitespace}}
  89 #define AAC\u0060 // expected-error {{character '`' cannot be specified by a universal character name}} \
  90                   // expected-warning {{whitespace}}
  91
  92 #define ABA \u0024 // expected-error {{character '$' cannot be specified by a universal character name}}
  93 #define ABB \u0040 // expected-error {{character '@' cannot be specified by a universal character name}}
  94 #define ABC \u0060 // expected-error {{character '`' cannot be specified by a universal character name}}
  95
  96 int GH62133_a\u0024; // expected-error {{character '$' cannot be specified by a universal character name}} \
  97                      // expected-error {{}}
  98 int GH62133_b\u0040; // expected-error {{character '@' cannot be specified by a universal character name}} \
  99                      // expected-error {{}}
 100 int GH62133_c\u0060; // expected-error {{character '`' cannot be specified by a universal character name}} \
 101                      // expected-error {{}}