20 lines
555 B
C
20 lines
555 B
C
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/* warn_2.c */
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/*
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* The following texts are legal but suspicious ones. Good preprocessor
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* will warn at these texts.
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*/
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/* { dg-do preprocess } */
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/* { dg-options "-ansi -pedantic -Wall" } */
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/* w.2.1: Negative number converted to positive in #if expression. */
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#if -1 < 0U /* { dg-warning "changes sign when promoted| converted to positive" } */
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#endif
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/* w.2.2: Out of range of unsigned type (wraps around and never overflow)
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in #if expression. */
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#if 0U - 1 /* { dg-warning "out of range" } */
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#endif
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