is_sequence_like

Determine if T can be treated like a sequence during conversions.

Synopsis

Defined in header <boost/json/conversion.hpp>.

template<
    class T>
struct is_sequence_like;

Description

Given t, a glvalue of type T, if

  • given It, the type denoted by decltype(std::begin(t)), std::iterator_traits<It>::iterator_category is well-formed and denotes a type; and

  • decltype(std::end(t)) also denotes the type It; and

  • std::iterator_traits<It>::value_type is not T; and

then the trait provides the member constant value that is equal to true. Otherwise, value is equal to false.

Users can specialize the trait for their own types if they don’t want them to be treated like sequences. For example:

namespace boost {
namespace json {

template <>
struct is_sequence_like<your::container> : std::false_type
{ };

} // namespace boost
} // namespace json

Types satisfying the trait

Any SequenceContainer, array types.

See Also

value_from, value_to

Convenience header <boost/json.hpp>.

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