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Macro BOOST_YAP_USER_UDT_UNARY_OPERATOR

BOOST_YAP_USER_UDT_UNARY_OPERATOR

Synopsis

// In header: <boost/yap/user_macros.hpp>

BOOST_YAP_USER_UDT_UNARY_OPERATOR(op_name, expr_template, udt_trait)

Description

Defines a free/non-member operator overload for unary operator op_name that produces an expression instantiated from the expr_template expression template.

The parameter to the defined operator overload may be any type that is not an expression and for which

udt_trait<std::remove_cv_t<std::remove_reference_t<T>>>::value 

is true. The parameter is wrapped in a terminal expression.

Example:


Parameters:

expr_template

The expression template to use to instantiate the result expression. expr_template must be an ExpressionTemplate.

op_name

The operator to be overloaded; this must be one of the unary enumerators in expr_kind, without the expr_kind:: qualification.

udt_trait

A trait template to use to constrain which types are accepted as template parameters to the defined operator overload.


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