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

// RUN: %clang_cc1 -x c++ -std=gnu++11 -fsyntax-only -pedantic -verify %s
// RUN: %clang_cc1 -x c -std=gnu11 -fsyntax-only -pedantic -verify %s
// RUN: %clang_cc1 -x c++ -std=gnu++11 -fwchar-type=short -fno-signed-wchar -fsyntax-only -pedantic -verify %s
// RUN: %clang_cc1 -x c -std=gnu11 -fwchar-type=short -fno-signed-wchar -fsyntax-only -pedantic -verify %s

const char *errors =
    "\u{}"  //expected-error {{delimited escape sequence cannot be empty}}
    "\u{"   //expected-error {{expected '}'}}
    "\u{h}" //expected-error {{invalid digit 'h' in escape sequence}}
    "\x{}"  //expected-error {{delimited escape sequence cannot be empty}}
    "\x{"   //expected-error {{expected '}'}}
    "\x{h}" //expected-error {{invalid digit 'h' in escape sequence}}
    "\o{}"  //expected-error {{delimited escape sequence cannot be empty}}
    "\o{"   //expected-error {{expected '}'}}
    "\o{8}" //expected-error {{invalid digit '8' in escape sequence}}
    ;

void ucn() {
  char a = '\u{1234}'; // expected-error {{character too large for enclosing character literal type}}
                       // expected-warning@-1 {{delimited escape sequences are a Clang extension}}

  unsigned b = U'\u{1234}'; // expected-warning {{extension}}

#ifdef __cplusplus
  unsigned b2 = U'\u{1}'; // expected-warning {{extension}}
#else
  unsigned b2 = U'\u{1}';     //expected-error {{universal character name refers to a control character}}
#endif

  unsigned c = U'\u{000000000001234}'; // expected-warning {{extension}}
  unsigned d = U'\u{111111111}';       //expected-error {{hex escape sequence out of range}}
}

void hex() {
  char a = '\x{1}';             // expected-warning {{extension}}
  char b = '\x{abcdegggggabc}'; // expected-error 5{{invalid digit 'g' in escape sequence}}
  char c = '\x{ff1}';           // expected-error {{hex escape sequence out of range}}

#if __WCHAR_MAX__ > 0xFFFF
  unsigned d = L'\x{FFFFFFFF}';  // expected-warning {{extension}}
  unsigned e = L'\x{100000000}'; // expected-error {{hex escape sequence out of range}}
#else
  unsigned f = L'\x{FFFF}';   // expected-warning {{extension}}
  unsigned g = L'\x{10000}';  // expected-error {{hex escape sequence out of range}}
#endif
  unsigned h = U'\x{FFFFFFFF}';  // expected-warning {{extension}}
  unsigned i = U'\x{100000000}'; // expected-error {{hex escape sequence out of range}}
}

void octal() {
  char a = '\o{1}';              // expected-warning {{extension}}
  char b = '\o{12345678881238}'; // expected-error 4{{invalid digit '8' in escape sequence}}
  char c = '\o{777}';            // //expected-error {{octal escape sequence out of range}}
#if __WCHAR_MAX__ > 0xFFFF
  unsigned d = L'\o{37777777777}'; // expected-warning {{extension}}
  unsigned e = L'\o{40000000000}'; // expected-error {{octal escape sequence out of range}}
#else
  unsigned d = L'\o{177777}'; // expected-warning {{extension}}
  unsigned e = L'\o{200000}'; // expected-error {{octal escape sequence out of range}}
#endif
}

void concat() {
  (void)"\x{" "12}"; // expected-error {{expected '}'}}
  (void)"\u{" "12}"; // expected-error {{expected '}'}}
  (void)"\o{" "12}"; // expected-error {{expected '}'}}

  (void)"\x{12" "}"; // expected-error {{expected '}'}}
  (void)"\u{12" "}"; // expected-error {{expected '}'}}
  (void)"\o{12" "}"; // expected-error {{expected '}'}}
}

void separators() {
  (void)"\x{12'3}"; // expected-error {{invalid digit ''' in escape sequence}}
  (void)"\u{12'3}"; // expected-error {{invalid digit ''' in escape sequence}}
  (void)"\o{12'3}"; // expected-error {{invalid digit ''' in escape sequence}}

  '\x{12'3'}';   // expected-error {{expected '}'}}
                 // expected-error@-1 2{{expected ';'}}
                 // expected-warning@-2 3{{expression result unused}}
}