// 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 names must be identifiers}} #define \U10000000 // expected-error {{macro names must be identifiers}} #define \u0061 // expected-error {{character 'a' cannot be specified by a universal character name}} expected-error {{macro names must be identifiers}} // 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}}