utf42::poly_enc Struct Reference

Container holding all character-encoded views of a string literal. More...

#include <utf42.h>

Collaboration diagram for utf42::poly_enc:

Public Member Functions
constexpr	poly_enc (const basic_string_view< char > txt_char, const basic_string_view< wchar_t > txt_char_w, const basic_string_view< char16_t > txt_char_16, const basic_string_view< char32_t > txt_char_32) noexcept
	Constructs a polymorphic encoding container.
template<typename char_t >
constexpr basic_string_view< char_t >	visit () const noexcept
	Selects the appropriate encoded string view for a given character type.
template<>
constexpr basic_string_view< char >	visit () const noexcept
template<>
constexpr basic_string_view< wchar_t >	visit () const noexcept
template<>
constexpr basic_string_view< char16_t >	visit () const noexcept
template<>
constexpr basic_string_view< char32_t >	visit () const noexcept

Public Attributes
basic_string_view< char >	TXT_CHAR
	Narrow character literal.
basic_string_view< wchar_t >	TXT_CHAR_W
	Wide character literal.
basic_string_view< char16_t >	TXT_CHAR_16
	UTF-16 character literal.
basic_string_view< char32_t >	TXT_CHAR_32
	UTF-32 character literal.

Detailed Description

Container holding all character-encoded views of a string literal.

Instances of this type are intended to be constructed only from string literals. Each member corresponds to a distinct literal encoding generated by the compiler.

No ownership is taken; all views refer directly to static storage.

Constructor & Destructor Documentation

poly_enc()

constexpr utf42::poly_enc::poly_enc ( const basic_string_view< char >  txt_char, const basic_string_view< wchar_t >  txt_char_w, const basic_string_view< char16_t >  txt_char_16, const basic_string_view< char32_t >  txt_char_32  )

inlineconstexprnoexcept

Constructs a polymorphic encoding container.

Parameters

txt_char	Narrow character string view.
txt_char_w	Wide character string view.
txt_char_8	UTF-8 string view. Only defined if C++20 is available.
txt_char_16	UTF-16 string view.
txt_char_32	UTF-32 string view.

Member Function Documentation

visit()

template<typename char_t >

constexpr basic_string_view< char_t > utf42::poly_enc::visit ( ) const

constexprnoexcept

Selects the appropriate encoded string view for a given character type.

This function is evaluated at compile time and returns a std::basic_string_view<char_t> referring to the correctly encoded literal stored in the provided poly_enc. Returns an empty string if the character type is not recognized.

Template Parameters

char_t

Desired character type.

Returns

A string view of the requested character type or char_t"".

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The documentation for this struct was generated from the following file:

• /home/runner/work/utf-42/utf-42/utf42.h