Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
BOOST_YAP_USER_UDT_ANY_IF_ELSE
// In header: <boost/yap/user_macros.hpp>
BOOST_YAP_USER_UDT_ANY_IF_ELSE(expr_template, udt_trait)Defines a function if_else() that acts as an analogue to the ternary operator (?:), since the ternary operator is not user-overloadable. The return type of if_else() is an expression instantiated from the expr_template expression template.
Each parameter to if_else() may be any type that is not an expression. At least on parameter must be a type T for which
udt_trait<std::remove_cv_t<std::remove_reference_t<T>>>::value
is true. Each parameter is wrapped in a terminal expression.
Example:
Parameters: |
|