map_alternative()

template<eve::relative_conditional_expr C>

auto eve::map_alternative	(	C	c,
		auto	op
	)

Required header: #include <eve/conditional.hpp>

Creates a eve::conditional_expr by applying an arbitrary operation op on c, thus modifying its alternate value if any is present.

Parameters

c	eve::conditional_expr to transform
op	Unary callable object to apply

Returns

A eve::conditional_expr of the same kind that c which alternative value, if any is repalced by op(c.alternative)