| // RUN: %clang_cc1 %s -fsyntax-only -std=c99 -pedantic -verify=expected,ext -Wundef -DTRIGRAPHS=1 |
| // RUN: %clang_cc1 %s -fsyntax-only -std=c23 -pedantic -verify=expected,ext -Wundef -ftrigraphs -DTRIGRAPHS=1 |
| // RUN: %clang_cc1 %s -fsyntax-only -x c++ -pedantic -verify=expected,ext -Wundef -fno-trigraphs |
| // RUN: %clang_cc1 %s -fsyntax-only -x c++ -std=c++23 -pedantic -ftrigraphs -DTRIGRAPHS=1 -verify=expected,cxx23 -Wundef -Wpre-c++23-compat |
| // RUN: %clang_cc1 %s -fsyntax-only -x c++ -pedantic -verify=expected,ext -Wundef -ftrigraphs -DTRIGRAPHS=1 |
| // RUN: not %clang_cc1 %s -fsyntax-only -std=c99 -pedantic -Wundef 2>&1 | FileCheck -strict-whitespace %s |
| |
| #define \u00FC |
| #define a\u00FD() 0 |
| #ifndef \u00FC |
| #error "This should never happen" |
| #endif |
| |
| #if a\u00FD() |
| #error "This should never happen" |
| #endif |
| |
| #if a\U000000FD() |
| #error "This should never happen" |
| #endif |
| |
| #if a\u{FD}() // ext-warning {{extension}} cxx23-warning {{before C++23}} |
| #error "This should never happen" |
| #endif |
| |
| #if \uarecool // expected-warning{{incomplete universal character name; treating as '\' followed by identifier}} expected-error {{invalid token at start of a preprocessor expression}} |
| #endif |
| #if \uwerecool // expected-warning{{\u used with no following hex digits; treating as '\' followed by identifier}} expected-error {{invalid token at start of a preprocessor expression}} |
| #endif |
| #if \U0001000 // expected-warning{{incomplete universal character name; treating as '\' followed by identifier}} expected-error {{invalid token at start of a preprocessor expression}} |
| #endif |
| |
| // Make sure we reject disallowed UCNs |
| #define \ufffe // expected-error {{macro name must be an identifier}} |
| #define \U10000000 // expected-error {{macro name must be an identifier}} |
| #define \u0061 // expected-error {{character 'a' cannot be specified by a universal character name}} expected-error {{macro name must be an identifier}} |
| #define \u{fffe} // expected-error {{macro name must be an identifier}} \ |
| // ext-warning {{extension}} cxx23-warning {{before C++23}} |
| #define \N{ALERT} // expected-error {{universal character name refers to a control character}} \ |
| // expected-error {{macro name must be an identifier}} \ |
| // ext-warning {{extension}} cxx23-warning {{before C++23}} |
| #define \N{WASTEBASKET} // expected-error {{macro name must be an identifier}} \ |
| // ext-warning {{extension}} cxx23-warning {{before C++23}} |
| #define a\u0024a // expected-error {{character '$' cannot be specified by a universal character name}} \ |
| // expected-warning {{requires whitespace after the macro name}} |
| |
| #if \u0110 // expected-warning {{is not defined, evaluates to 0}} |
| #endif |
| |
| |
| #define \u0110 1 / 0 |
| #if \u0110 // expected-error {{division by zero in preprocessor expression}} |
| #endif |
| |
| #define STRINGIZE(X) # X |
| |
| extern int check_size[sizeof(STRINGIZE(\u0112)) == 3 ? 1 : -1]; |
| |
| // Check that we still diagnose disallowed UCNs in #if 0 blocks. |
| // C99 5.1.1.2p1 and C++11 [lex.phases]p1 dictate that preprocessor tokens are |
| // formed before directives are parsed. |
| // expected-error@+4 {{character 'a' cannot be specified by a universal character name}} |
| #if 0 |
| #define \ufffe // okay |
| #define \U10000000 // okay |
| #define \u0061 // error, but -verify only looks at comments outside #if 0 |
| #endif |
| |
| |
| // A UCN formed by token pasting is undefined in both C99 and C++. |
| // Right now we don't do anything special, which causes us to coincidentally |
| // accept the first case below but reject the second two. |
| #define PASTE(A, B) A ## B |
| extern int PASTE(\, u00FD); |
| extern int PASTE(\u, 00FD); // expected-warning{{\u used with no following hex digits}} |
| extern int PASTE(\u0, 0FD); // expected-warning{{incomplete universal character name}} |
| #ifdef __cplusplus |
| // expected-error@-3 {{expected unqualified-id}} |
| // expected-error@-3 {{expected unqualified-id}} |
| #else |
| // expected-error@-6 {{expected identifier}} |
| // expected-error@-6 {{expected identifier}} |
| #endif |
| |
| |
| // A UCN produced by line splicing is valid in C99 but undefined in C++. |
| // Since undefined behavior can do anything including working as intended, |
| // we just accept it in C++ as well.; |
| #define newline_1_\u00F\ |
| C 1 |
| #define newline_2_\u00\ |
| F\ |
| C 1 |
| #define newline_3_\u\ |
| 00\ |
| FC 1 |
| #define newline_4_\\ |
| u00FC 1 |
| #define newline_5_\\ |
| u\ |
| \ |
| 0\ |
| 0\ |
| F\ |
| C 1 |
| |
| #if (newline_1_\u00FC && newline_2_\u00FC && newline_3_\u00FC && \ |
| newline_4_\u00FC && newline_5_\u00FC) |
| #else |
| #error "Line splicing failed to produce UCNs" |
| #endif |
| |
| |
| #define capital_u_\U00FC |
| // expected-warning@-1 {{incomplete universal character name}} expected-note@-1 {{did you mean to use '\u'?}} expected-warning@-1 {{whitespace}} |
| // CHECK: note: did you mean to use '\u'? |
| // CHECK-NEXT: {{^ .* | #define capital_u_\U00FC}} |
| // CHECK-NEXT: {{^ | \^}} |
| // CHECK-NEXT: {{^ | u}} |
| |
| #define \u{} // expected-warning {{empty delimited universal character name; treating as '\' 'u' '{' '}'}} expected-error {{macro name must be an identifier}} |
| #define \u1{123} // expected-warning {{incomplete universal character name; treating as '\' followed by identifier}} expected-error {{macro name must be an identifier}} |
| #define \u{123456789} // expected-error {{hex escape sequence out of range}} expected-error {{macro name must be an identifier}} |
| #define \u{ // expected-warning {{incomplete delimited universal character name; treating as '\' 'u' '{' identifier}} expected-error {{macro name must be an identifier}} |
| #define \u{fgh} // expected-warning {{incomplete delimited universal character name; treating as '\' 'u' '{' identifier}} expected-error {{macro name must be an identifier}} |
| #define \N{ |
| // expected-warning@-1 {{incomplete delimited universal character name; treating as '\' 'N' '{' identifier}} |
| // expected-error@-2 {{macro name must be an identifier}} |
| #define \N{} // expected-warning {{empty delimited universal character name; treating as '\' 'N' '{' '}'}} expected-error {{macro name must be an identifier}} |
| #define \N{NOTATHING} // expected-error {{'NOTATHING' is not a valid Unicode character name}} \ |
| // expected-error {{macro name must be an identifier}} |
| #define \NN // expected-warning {{incomplete universal character name; treating as '\' followed by identifier}} expected-error {{macro name must be an identifier}} |
| #define \N{GREEK_SMALL-LETTERALPHA} // expected-error {{'GREEK_SMALL-LETTERALPHA' is not a valid Unicode character name}} \ |
| // expected-note {{characters names in Unicode escape sequences are sensitive to case and whitespaces}} |
| #define \N{🤡} // expected-error {{'🤡' is not a valid Unicode character name}} \ |
| // expected-error {{macro name must be an identifier}} |
| |
| #define CONCAT(A, B) A##B |
| int CONCAT(\N{GREEK |
| , CAPITALLETTERALPHA}); |
| // expected-error@-2 {{expected}} \ |
| // expected-warning@-2 {{incomplete delimited universal character name}} |
| |
| int \N{\ |
| LATIN CAPITAL LETTER A WITH GRAVE}; |
| //ext-warning@-2 {{extension}} cxx23-warning@-2 {{before C++23}} |
| |
| #ifdef TRIGRAPHS |
| int \N??<GREEK CAPITAL LETTER ALPHA??> = 0; // cxx23-warning {{before C++23}} \ |
| //ext-warning {{extension}}\ |
| // expected-warning 2{{trigraph converted}} |
| |
| int a\N{LATIN CAPITAL LETTER A WITH GRAVE??>; // expected-warning {{trigraph converted}} |
| #endif |
| |
| #ifndef TRIGRAPHS |
| int a\N{LATIN CAPITAL LETTER A WITH GRAVE??>; |
| // expected-warning@-1 {{trigraph ignored}}\ |
| // expected-warning@-1 {{incomplete}}\ |
| // expected-error@-1 {{expected unqualified-id}} |
| #endif |
| |
| // GH64161 |
| int A\N{LEFT-TO-RIGHT OVERRIDE}; // expected-error {{character <U+202D> not allowed in an identifier}} |