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

This is the documentation for a snapshot of the master branch, built from commit 064f557086.

grammar::is_charset

Alias for std::true_type if T satisfies CharSet.

Synopsis

Defined in header <boost/url/grammar/charset.hpp>

template<
    class T>
using is_charset = see-below;

Description

This metafunction determines if the type T meets these requirements of CharSet:

An instance of T is invocable with this equivalent function signature:
```
bool T::operator()( char ) const noexcept ;
```

Example

Use with enable_if on the return value:

template < class CharSet >
typename std::enable_if< is_charset<T>::value >::type
func( CharSet const & cs );

Template Parameters

Type	Description
`T`	the type to check.

Convenience header <boost/url/grammar.hpp>