utf8

非推奨を表示

This library provides basic support for UTF-8 encoding. This library does not provide any support for Unicode other than the handling of the encoding. Any operation that needs the meaning of a character, such as character classification, is outside its scope.

Unless stated otherwise, all functions that expect a byte position as a parameter assume that the given position is either the start of a byte sequence or one plus the length of the subject string. As in the string library, negative indices count from the end of the string.

You can find a large catalog of usable UTF-8 characters here.

概要

プロパティ

  • The pattern "[%z\x01-\x7F\xC2-\xF4][\x80-\xBF]*", which matches exactly zero or more UTF-8 byte sequences, assuming that the subject is a valid UTF-8 string.

関数

char

パラメータ

codepoints: Tuple<number>

戻り値

パラメータ

str: string

codepoint

パラメータ

str: string
既定値: 1
既定値: i

戻り値

パラメータ

既定値: 1
既定値: -1

戻り値

offset

パラメータ

既定値: 1

戻り値

graphemes

パラメータ

戻り値

nfcnormalize

パラメータ

str: string

戻り値

nfdnormalize

パラメータ

str: string

戻り値

プロパティ

charpattern

The pattern "[%z\x01-\x7F\xC2-\xF4][\x80-\xBF]*", which matches exactly zero or more UTF-8 byte sequence, assuming that the subject is a valid UTF-8 string.