zorba::internal::ztd::explicit_bool

#include <zorba/internal/ztd.h>

Helper class for implementing a solution to the "explicit bool conversion" problem. The canonical use is of the form:

  class your_class {
    // ...
    operator explicit_bool::type() const {
      return explicit_bool::value_of( some_expression );
    }
  };

Public Types

int pointer_conversion::*

type	false_value() Gets the explicit `bool` value for `false`.
type	true_value() Gets the explicit `bool` value for `true`.
std::enable_if< ZORBA_TR1_NS::is_convertible< T, bool >::value, type >::type	value_of(T const &value) Converts the given value to an explicit `bool` value.

int pointer_conversion::* type

type false_value()

Gets the explicit bool value for false.

Returns said value.

type true_value()

Gets the explicit bool value for true.

Returns said value.

std::enable_if< ZORBA_TR1_NS::is_convertible< T, bool >::value, type >::type value_of(T const &value)

Converts the given value to an explicit bool value.

T	The type of the value to convert.

value

The value to convert.

Return said value.