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
787 B
C
35 lines
787 B
C
/* RUN: %clang_cc1 -E -verify %s
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*/
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/* expected-error@+1 {{macro name missing}} */
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#ifdef
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#endif
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/* expected-error@+1 {{macro name must be an identifier}} */
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#ifdef !
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#endif
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/* expected-error@+1 {{macro name missing}} */
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#if defined
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#endif
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/* PR1936 */
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/* expected-error@+2 {{unterminated function-like macro invocation}} expected-error@+2 {{expected value in expression}} expected-note@+1 {{macro 'f' defined here}} */
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#define f(x) x
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#if f(2
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#endif
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/* expected-error@+3 {{macro name missing}} */
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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
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#endif
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/* expected-error@+3 {{macro name must be an identifier}} */
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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 !
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#endif
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int x;
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