Indicates that the name or entity declared with this attribute is deprecated, that is, the use is allowed, but discouraged for some reason.
[[deprecated ]] | (1) | |
[[deprecated( string-literal )]] | (2) |
string-literal | - | text that could be used to explain the rationale for deprecation and/or to suggest a replacing entity |
Indicates that the use of the name or entity declared with this attribute is allowed, but discouraged for some reason. Compilers typically issue warnings on such uses. The string-literal, if specified, is usually included in the warnings.
This attribute is allowed in declarations of the following names or entities:
struct [[deprecated]] S;
, [[deprecated]] typedef S* PS;
, using PS [[deprecated]] = S*;
, [[deprecated]] int x;
, union U { [[deprecated]] int n; };
, [[deprecated]] void f();
, namespace [[deprecated]] NS { int x; }
enum [[deprecated]] E {};
, enum { A [[deprecated]], B [[deprecated]] = 42 };
. template<> struct [[deprecated]] X<int> {};
A name declared non-deprecated may be redeclared deprecated. A name declared deprecated cannot be un-deprecated by redeclaring it without this attribute.
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http://en.cppreference.com/w/cpp/language/attributes/deprecated