value::as_bool

Return the underlying bool, or throw an exception.

Synopsis

bool&
as_bool(
    boost::source_location const& loc = BOOST_CURRENT_LOCATION); (1)

bool
as_bool(
    boost::source_location const& loc = BOOST_CURRENT_LOCATION) const; (2)

Description

If is_bool() is true, returns a reference to (1) or a copy of (2) the underlying bool, otherwise throws an exception.

Exception Safety

Strong guarantee.

Parameters

Name Description

loc

boost::source_location to use in thrown exception; the source location of the call site by default.

Exceptions

Type Thrown On

boost::system::system_error

! this->is_bool().

Complexity

Constant.

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