C++ Type Traits Overview [closed]

问题

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Closed 8 years ago.

Has anybody put together a list of all the type traits available in standard <type_traits> (GCC-4.6.1) and Boost's own <boost/type_traits.hpp>?

回答1:

The full lists of traits are available online:

• The Boost documentation lists the traits in <boost/type_traits.hpp>;
• The C++0x draft lists the traits in <type_traits>.

However, the GCC implementation is not yet complete. GCC 4.6 is missing:

• The std::underlying_type trait. This one will be on GCC 4.7.
• The std::is_trivially_X series of traits. Instead it has std::has_trivial_default_constructor and similar that seem to have the name from an earlier draft. The one about the move constructor is missing.
• The std::is_nothrow_X series of traits. These also use an older name like std::has_nothrow_default_constructor. The one about the move constructor is missing too.
• The std::aligned_union trait. This one can be easily implemented in terms of std::aligned_storage, which is currently supported.

来源：https://stackoverflow.com/questions/7613386/c-type-traits-overview