a1545f51a9
This adds an extension warning when using the preprocessor conditionals in a language mode they're not officially supported in, and an opt-in warning for compatibility with previous standards. Fixes #55306 Differential Revision: https://reviews.llvm.org/D125178
35 lines
730 B
C
35 lines
730 B
C
// RUN: %clang_cc1 %s -Eonly -Werror=undef -verify
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extern int x;
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#if foo // expected-error {{'foo' is not defined, evaluates to 0}}
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#endif
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// expected-warning@+2 {{use of a '#elifdef' directive is a C2x extension}}
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#ifdef foo
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#elifdef foo
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#endif
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#if defined(foo)
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#endif
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// PR3938
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// expected-warning@+3 {{use of a '#elifdef' directive is a C2x extension}}
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#if 0
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#ifdef D
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#elifdef D
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#else 1 // Should not warn due to C99 6.10p4
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#endif
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#endif
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// rdar://9475098
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#if 0
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#else 1 // expected-warning {{extra tokens}}
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#endif
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// PR6852
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#if 'somesillylongthing' // expected-warning {{character constant too long for its type}} \
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// expected-warning {{multi-character character constant}}
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#endif
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