derek.holloway
7502bf64a4
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46 lines
1.5 KiB
C++
46 lines
1.5 KiB
C++
// RUN: %clang_cc1 -E -pedantic-errors %s -verify -std=c++98
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// RUN: %clang_cc1 -E -pedantic-errors %s -verify -std=c++11
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// RUN: %clang_cc1 -E -pedantic-errors %s -verify -std=c++14
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// RUN: %clang_cc1 -E -pedantic-errors %s -verify -std=c++17
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// RUN: %clang_cc1 -E -pedantic-errors %s -verify -std=c++20
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// RUN: %clang_cc1 -E -pedantic-errors %s -verify=expected,since-cxx23 -std=c++23 -Wno-c23-extensions
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// RUN: %clang_cc1 -E -pedantic-errors %s -verify=expected,since-cxx23 -std=c++2c -Wno-c23-extensions
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// Test 1: Top-level comma
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// expected-error@+1 {{expected end of line in preprocessor expression}}
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#if 1, 2
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#endif
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// Test 2: Comma in conditional expression(CWG3017)
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// Per CWG 3017, this exact case highlights the specification gap
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// where C++ lacks explicit prohibition of comma operators in #if
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// expected-error@+1 {{comma operator in operand of #if}}
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#if 1 ? 1, 0 : 3
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#endif
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// Test 3: Parenthesized comma
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// expected-error@+1 {{comma operator in operand of #if}}
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#if (1, 2)
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#endif
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// Test 4: Multiple commas
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// expected-error@+1 {{expected end of line in preprocessor expression}}
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#if 1, 2, 3
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#endif
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// Test 5: Comma in #elif
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#if 0
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#elif (1, 2) // expected-error {{comma operator in operand of #if}}
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#endif
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// Test 6: Leading comma (syntax error)
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// expected-error@+1 {{invalid token at start of a preprocessor expression}}
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#if ,
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#endif
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// Test 7: Comma in #embed limit parameter (C++23+)
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#if __cplusplus >= 202302L
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// since-cxx23-error@+1 {{expected ')'}}
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#embed "jk.txt" limit(1, 2)
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#endif
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