tmp/tmpmaq1js9o/{from.md → to.md}
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### Deprecated attribute <a id="dcl.attr.deprecated">[[dcl.attr.deprecated]]</a>
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The *attribute-token* `deprecated` can be used to mark names and
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entities whose use is still allowed, but is discouraged for some reason.
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in particular, `deprecated` is appropriate for names and entities that
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are deemed obsolescent or unsafe. It shall appear at most once in each
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*attribute-list*. An *attribute-argument-clause* may be present and, if
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present, it shall have the form:
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``` cpp
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( string-literal )
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```
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the *string-literal* in the *attribute-argument-clause* could be used to
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explain the rationale for deprecation and/or to suggest a replacing
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entity.
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The attribute may be applied to the declaration of a class, a
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*typedef-name*, a variable, a non-static data member, a function, an
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enumeration, or a template specialization.
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A name or entity declared without the `deprecated` attribute can later
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be re-declared with the attribute and vice-versa. Thus, an entity
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initially declared without the attribute can be marked as deprecated by
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a subsequent redeclaration. However, after an entity is marked as
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deprecated, later redeclarations do not un-deprecate the entity.
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Redeclarations using different forms of the attribute (with or without
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the *attribute-argument-clause* or with different
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*attribute-argument-clause*s) are allowed.
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Implementations may use the `deprecated `attribute to produce a
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diagnostic message in case the program refers to a name or entity other
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than to declare it, after a declaration that specifies the attribute.
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The diagnostic message may include the text provided within the
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*attribute-argument-clause* of any `deprecated` attribute applied to the
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name or entity.
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