| // RUN: %clang_cc1 %s -fsyntax-only -std=c99 -pedantic -verify -Wundef |
| // RUN: %clang_cc1 %s -fsyntax-only -x c++ -pedantic -verify -Wundef |
| // 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 \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}} |
| |
| // FIXME: Not clear what our behavior should be here; \u0024 is "$". |
| #define a\u0024 // expected-warning {{whitespace}} |
| |
| #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}} |