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106 lines
3.5 KiB
106 lines
3.5 KiB
4 months ago
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// RUN: %clang_cc1 %s -fsyntax-only -std=c99 -pedantic -verify -Wundef
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// RUN: %clang_cc1 %s -fsyntax-only -x c++ -pedantic -verify -Wundef
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// RUN: not %clang_cc1 %s -fsyntax-only -std=c99 -pedantic -Wundef 2>&1 | FileCheck -strict-whitespace %s
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#define \u00FC
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#define a\u00FD() 0
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#ifndef \u00FC
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#error "This should never happen"
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#endif
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#if a\u00FD()
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#error "This should never happen"
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#endif
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#if a\U000000FD()
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#error "This should never happen"
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#endif
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#if \uarecool // expected-warning{{incomplete universal character name; treating as '\' followed by identifier}} expected-error {{invalid token at start of a preprocessor expression}}
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#endif
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#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}}
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#endif
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#if \U0001000 // expected-warning{{incomplete universal character name; treating as '\' followed by identifier}} expected-error {{invalid token at start of a preprocessor expression}}
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#endif
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// Make sure we reject disallowed UCNs
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#define \ufffe // expected-error {{macro name must be an identifier}}
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#define \U10000000 // expected-error {{macro name must be an identifier}}
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#define \u0061 // expected-error {{character 'a' cannot be specified by a universal character name}} expected-error {{macro name must be an identifier}}
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#define a\u0024
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#if \u0110 // expected-warning {{is not defined, evaluates to 0}}
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#endif
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#define \u0110 1 / 0
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#if \u0110 // expected-error {{division by zero in preprocessor expression}}
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#endif
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#define STRINGIZE(X) # X
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extern int check_size[sizeof(STRINGIZE(\u0112)) == 3 ? 1 : -1];
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// Check that we still diagnose disallowed UCNs in #if 0 blocks.
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// C99 5.1.1.2p1 and C++11 [lex.phases]p1 dictate that preprocessor tokens are
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// formed before directives are parsed.
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// expected-error@+4 {{character 'a' cannot be specified by a universal character name}}
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#if 0
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#define \ufffe // okay
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#define \U10000000 // okay
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#define \u0061 // error, but -verify only looks at comments outside #if 0
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#endif
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// A UCN formed by token pasting is undefined in both C99 and C++.
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// Right now we don't do anything special, which causes us to coincidentally
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// accept the first case below but reject the second two.
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#define PASTE(A, B) A ## B
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extern int PASTE(\, u00FD);
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extern int PASTE(\u, 00FD); // expected-warning{{\u used with no following hex digits}}
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extern int PASTE(\u0, 0FD); // expected-warning{{incomplete universal character name}}
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#ifdef __cplusplus
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// expected-error@-3 {{expected unqualified-id}}
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// expected-error@-3 {{expected unqualified-id}}
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#else
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// expected-error@-6 {{expected identifier}}
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// expected-error@-6 {{expected identifier}}
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#endif
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// A UCN produced by line splicing is valid in C99 but undefined in C++.
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// Since undefined behavior can do anything including working as intended,
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// we just accept it in C++ as well.;
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#define newline_1_\u00F\
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C 1
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#define newline_2_\u00\
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F\
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C 1
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#define newline_3_\u\
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00\
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FC 1
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#define newline_4_\\
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u00FC 1
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#define newline_5_\\
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u\
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\
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0\
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0\
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F\
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C 1
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#if (newline_1_\u00FC && newline_2_\u00FC && newline_3_\u00FC && \
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newline_4_\u00FC && newline_5_\u00FC)
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#else
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#error "Line splicing failed to produce UCNs"
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#endif
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#define capital_u_\U00FC
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// expected-warning@-1 {{incomplete universal character name}} expected-note@-1 {{did you mean to use '\u'?}} expected-warning@-1 {{whitespace}}
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// CHECK: note: did you mean to use '\u'?
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// CHECK-NEXT: #define capital_u_\U00FC
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// CHECK-NEXT: {{^ \^}}
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// CHECK-NEXT: {{^ u}}
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