make_decode_state

This detects when the decode_state of a given encoding requires the encoding itself to make said state. If so, it will call the decode_state‘s constructor with the encoding passed in. Otherwise, it simply default-constructs a state. In either case, the constructed value is returned to the user.

The classification for this is done by ztd::text::is_decode_state_independent.

template<typename _Encoding>
constexpr decode_state_t<remove_cvref_t<_Encoding>> ztd::text::make_decode_state(_Encoding &__encoding) noexcept

Constructs the decode_state of the given encoding, based on whether or not the encoding and state meet the criteria of ztd::text::is_decode_state_independent_v.

Parameters

__encoding – [in] The encoding object to use, if applicable, for the construction of the state.

template<typename _Encoding>
constexpr decode_state_t<remove_cvref_t<_Encoding>> ztd::text::make_decode_state_with(_Encoding &__encoding, const encode_state_t<remove_cvref_t<_Encoding>> &__encode_state) noexcept

Constructs the decode_state of the given encoding, based on whether or not the encoding and state meet the criteria of ztd::text::is_decode_state_independent_v or whether it can be created by copy construction from the given __encode_state.

Parameters

• __encoding – [in] The encoding object to use, if applicable, for the construction of the state.

• __encode_state – [in] A preexisting state from the encoder.