clang/test/Lexer/char-escapes-delimited.c

   1 // RUN: %clang_cc1 -x c++ -std=gnu++11 -fsyntax-only -pedantic -verify=ext,expected %s
   2 // RUN: %clang_cc1 -x c -std=gnu11 -fsyntax-only -pedantic -verify=ext,expected %s
   3 // RUN: %clang_cc1 -x c++ -std=c++23 -fsyntax-only -pedantic -verify=cxx23,expected -Wpre-c++23-compat %s
   4 // RUN: %clang_cc1 -x c++ -std=gnu++11 -fwchar-type=short -fno-signed-wchar -fsyntax-only -pedantic -verify=ext,expected %s
   5 // RUN: %clang_cc1 -x c -std=gnu11 -fwchar-type=short -fno-signed-wchar -fsyntax-only -pedantic -verify=ext,expected %s
   6 // RUN: %clang_cc1 -x c++ -std=c++17 -ftrigraphs -fsyntax-only -pedantic -verify=ext,expected -DTRIGRAPHS=1 %s
   7
   8 const char *errors =
   9     "\u{}"  // expected-error {{delimited escape sequence cannot be empty}}
  10     "\u{"   // expected-error {{expected '}'}}
  11     "\u{h}" // expected-error {{invalid digit 'h' in escape sequence}}
  12     "\x{}"  // expected-error {{delimited escape sequence cannot be empty}}
  13     "\x{"   // expected-error {{expected '}'}}
  14     "\x{h}" // expected-error {{invalid digit 'h' in escape sequence}}
  15     "\o{}"  // expected-error {{delimited escape sequence cannot be empty}}
  16     "\o{"   // expected-error {{expected '}'}}
  17     "\o"    // expected-error {{expected '{' after '\o' escape sequence}}
  18     "\o{8}" // expected-error {{invalid digit '8' in escape sequence}}
  19     "\U{8}" // expected-error {{\U used with no following hex digits}}
  20     ;
  21
  22 void ucn(void) {
  23   char a = '\u{1234}'; // expected-error {{character too large for enclosing character literal type}} \
  24                        // ext-warning {{extension}} cxx23-warning {{C++23}}
  25
  26   unsigned b = U'\u{1234}';   // ext-warning {{extension}} cxx23-warning {{C++23}}
  27
  28 #ifdef __cplusplus
  29   unsigned b2 = U'\u{1}';     // ext-warning {{extension}} cxx23-warning {{C++23}}
  30 #else
  31   unsigned b2 = U'\u{1}';     //expected-error {{universal character name refers to a control character}}
  32 #endif
  33
  34   unsigned c = U'\u{000000000001234}'; // ext-warning {{extension}} cxx23-warning {{C++23}}
  35   unsigned d = U'\u{111111111}';       //expected-error {{hex escape sequence out of range}}
  36 }
  37
  38 void hex(void) {
  39   char a = '\x{1}';             // ext-warning {{extension}} cxx23-warning {{C++23}}
  40   char b = '\x{abcdegggggabc}'; // expected-error 5{{invalid digit 'g' in escape sequence}}
  41   char c = '\x{ff1}';           // expected-error {{hex escape sequence out of range}}
  42
  43 #if __WCHAR_MAX__ > 0xFFFF
  44   unsigned d = L'\x{FFFFFFFF}';  // ext-warning {{extension}} cxx23-warning {{C++23}}
  45   unsigned e = L'\x{100000000}'; // expected-error {{hex escape sequence out of range}}
  46 #else
  47   unsigned f = L'\x{FFFF}';   // ext-warning {{extension}} cxx23-warning {{C++23}}
  48   unsigned g = L'\x{10000}';  // expected-error {{hex escape sequence out of range}}
  49 #endif
  50   unsigned h = U'\x{FFFFFFFF}';  // ext-warning {{extension}} cxx23-warning {{C++23}}
  51   unsigned i = U'\x{100000000}'; // expected-error {{hex escape sequence out of range}}
  52 }
  53
  54 void octal(void) {
  55   char a = '\o{1}';              // ext-warning {{extension}} cxx23-warning {{C++23}}
  56   char b = '\o{12345678881238}'; // expected-error 4{{invalid digit '8' in escape sequence}}
  57   char c = '\o{777}';            // //expected-error {{octal escape sequence out of range}}
  58 #if __WCHAR_MAX__ > 0xFFFF
  59   unsigned d = L'\o{37777777777}'; // ext-warning {{extension}} cxx23-warning {{C++23}}
  60   unsigned e = L'\o{40000000000}'; // expected-error {{octal escape sequence out of range}}
  61   unsigned f = L'\o{100000000000}'; // expected-error {{octal escape sequence out of range}}
  62   unsigned g = L'\o{200000000000}'; // expected-error {{octal escape sequence out of range}}
  63 #else
  64   unsigned d = L'\o{177777}'; // ext-warning {{extension}} cxx23-warning {{C++23}}
  65   unsigned e = L'\o{200000}'; // expected-error {{octal escape sequence out of range}}
  66 #endif
  67 }
  68
  69 void concat(void) {
  70   (void)"\x{" "12}"; // expected-error {{expected '}'}}
  71   (void)"\u{" "12}"; // expected-error {{expected '}'}}
  72   (void)"\o{" "12}"; // expected-error {{expected '}'}}
  73
  74   (void)"\x{12" "}"; // expected-error {{expected '}'}}
  75   (void)"\u{12" "}"; // expected-error {{expected '}'}}
  76   (void)"\o{12" "}"; // expected-error {{expected '}'}}
  77 }
  78
  79 void named(void) {
  80   char a = '\N{LOTUS}'; // expected-error{{character too large for enclosing character literal type}} \
  81                         // ext-warning {{extension}} cxx23-warning {{C++23}}
  82
  83   char b  = '\N{DOLLAR SIGN}'; // ext-warning {{extension}} cxx23-warning {{C++23}}
  84   char b_ = '\N{ DOL-LAR _SIGN }'; // expected-error {{' DOL-LAR _SIGN ' is not a valid Unicode character name}} \
  85                                // expected-note {{characters names in Unicode escape sequences are sensitive to case and whitespaces}}
  86
  87   char c = '\N{NOTATHING}'; // expected-error {{'NOTATHING' is not a valid Unicode character name}} \
  88                             // expected-note 5{{did you mean}}
  89   char d = '\N{}';          // expected-error {{delimited escape sequence cannot be empty}}
  90   char e = '\N{';           // expected-error {{incomplete universal character name}}
  91
  92   unsigned f = L'\N{GREEK CAPITAL LETTER DELTA}'; // ext-warning {{extension}} cxx23-warning {{C++23}}
  93
  94   unsigned g = u'\N{LOTUS}'; // expected-error {{character too large for enclosing character literal type}} \
  95                              // ext-warning {{extension}} cxx23-warning {{C++23}}
  96
  97   unsigned h = U'\N{LOTUS}';                      // ext-warning {{extension}} cxx23-warning {{C++23}}
  98   unsigned i = u'\N{GREEK CAPITAL LETTER DELTA}'; // ext-warning {{extension}} cxx23-warning {{C++23}}
  99   char j = '\NN';                                 // expected-error {{expected '{' after '\N' escape sequence}} expected-warning {{multi-character character constant}}
 100   unsigned k = u'\N{LOTUS';                       // expected-error {{incomplete universal character name}}
 101
 102   const char* emoji = "\N{🤡}"; // expected-error {{'🤡' is not a valid Unicode character name}} \
 103                                 // expected-note 5{{did you mean}}
 104   const char* nested = "\N{\N{SPARKLE}}"; // expected-error {{'\N{SPARKLE' is not a valid Unicode character name}} \
 105                                           // expected-note 5{{did you mean}}
 106 }
 107
 108 void separators(void) {
 109   (void)"\x{12'3}"; // expected-error {{invalid digit ''' in escape sequence}}
 110   (void)"\u{12'3}"; // expected-error {{invalid digit ''' in escape sequence}}
 111   (void)"\o{12'3}"; // expected-error {{invalid digit ''' in escape sequence}}
 112
 113   '\x{12'3'}';   // expected-error {{expected '}'}}
 114                  // expected-error@-1 2{{expected ';'}}
 115                  // expected-warning@-2 3{{expression result unused}}
 116 }
 117
 118 #if L'\N{GREEK CAPITAL LETTER GAMMA}' != L'Γ' // ext-warning {{extension}} cxx23-warning {{C++23}}
 119 #error "oh no!"
 120 #endif
 121
 122 #ifdef TRIGRAPHS
 123 static_assert('\N??<DOLLAR SIGN??>' == '$'); // expected-warning 2{{trigraph converted}} \
 124                                              // ext-warning {{extension}} cxx23-warning {{C++23}}
 125 #endif
 126
 127 void GH102218(void) {
 128   // The format specifier checking code runs the lexer with diagnostics
 129   // disabled. This used to crash Clang for malformed \o and \x because the
 130   // lexer missed a null pointer check for the diagnostics engine in that case.
 131   extern int printf(const char *, ...);
 132   printf("\o{}"); // expected-error {{delimited escape sequence cannot be empty}}
 133   printf("\x{}"); // expected-error {{delimited escape sequence cannot be empty}}
 134
 135   // These cases always worked but are here for completeness.
 136   printf("\u{}"); // expected-error {{delimited escape sequence cannot be empty}}
 137   printf("\N{}"); // expected-error {{delimited escape sequence cannot be empty}}
 138 }