1 // RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c11 -x c -fsyntax-only -verify %s 2 // RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c2x -x c -fsyntax-only -verify %s 3 // RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -fsyntax-only -verify %s 4 // RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++17 -fsyntax-only -verify %s 5 // RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++17 -fsyntax-only -fchar8_t -verify %s 6 // RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++20 -fsyntax-only -verify %s 7 // RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++20 -fsyntax-only -fno-char8_t -verify %s 8 9 int array0[u'ñ' == u'\xf1'? 1 : -1]; 10 int array1['\xF1' != u'\xf1'? 1 : -1]; 11 int array1['ñ' != u'\xf1'? 1 : -1]; // expected-error {{character too large for enclosing character literal type}} 12 #if __cplusplus > 201402L 13 char a = u8'ñ'; // expected-error {{character too large for enclosing character literal type}} 14 char b = u8'\x80'; // ok 15 char c = u8'\u0080'; // expected-error {{character too large for enclosing character literal type}} 16 char d = u8'\u1234'; // expected-error {{character too large for enclosing character literal type}} 17 char e = u8'ሴ'; // expected-error {{character too large for enclosing character literal type}} 18 char f = u8'ab'; // expected-error {{Unicode character literals may not contain multiple characters}} 19 #elif __STDC_VERSION__ >= 202311L 20 char a = u8'ñ'; // expected-error {{character too large for enclosing character literal type}} 21 char b = u8'\x80'; // ok 22 char c = u8'\u0000'; // ok 23 char d = u8'\u1234'; // expected-error {{character too large for enclosing character literal type}} 24 char e = u8'ሴ'; // expected-error {{character too large for enclosing character literal type}} 25 char f = u8'ab'; // expected-error {{Unicode character literals may not contain multiple characters}} 26 _Static_assert( 27 _Generic(u8'a', 28 default : 0, 29 unsigned char : 1), 30 "Surprise!"); 31 #endif 32 33 34 // UTF-8 character literals are enabled in C++17 and later. If `-fchar8_t` is not enabled 35 // (as is the case in C++17), then UTF-8 character literals may produce signed or 36 // unsigned values depending on whether char is a signed type. If `-fchar8_t` is enabled 37 // (which is the default behavior for C++20), then UTF-8 character literals always 38 // produce unsigned values. The tests below depend on the target having a signed 39 // 8-bit char so that '\xff' produces a negative value. 40 #if __cplusplus >= 201703L 41 # if !defined(__cpp_char8_t) 42 # if !(u8'\xff' == '\xff') 43 # error UTF-8 character value did not match ordinary character literal; this is unexpected 44 # endif 45 # else 46 # if u8'\xff' == '\xff' // expected-warning {{right side of operator converted from negative value to unsigned}} 47 # error UTF-8 character value matched ordinary character literal; this is unexpected 48 # endif 49 # endif 50 #endif 51 52 /// In C23, u8 char literals are always unsigned. 53 #if __STDC_VERSION__ >= 202311L 54 # if u8'\xff' == '\xff'// expected-warning {{right side of operator converted from negative value to unsigned}} 55 # error u8 char literal is not unsigned 56 # endif 57 #endif 58