Ruby
3.1.4p223 (2023-03-30 revision HEAD)
include
ruby
internal
has
c_attribute.h
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#ifndef RBIMPL_HAS_C_ATTRIBUTE_H
/*-*-C++-*-vi:se ft=cpp:*/
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#define RBIMPL_HAS_C_ATTRIBUTE_H
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#if defined(__cplusplus)
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#
/* Makes no sense. */
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# define RBIMPL_HAS_C_ATTRIBUTE(_) 0
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#elif defined(__has_c_attribute)
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# define RBIMPL_HAS_C_ATTRIBUTE(_) __has_c_attribute(_)
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#else
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#
/* As of writing everything that lacks __has_c_attribute also completely
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# * lacks C2x attributes as well. Might change in future? */
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# define RBIMPL_HAS_C_ATTRIBUTE(_) 0
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#endif
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#endif
/* RBIMPL_HAS_C_ATTRIBUTE_H */
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