utf8

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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-8characters here.

Summary

Functions

char(codepoints: Tuple<number>): string  

codes(str: string): function  

len(s: string, i: number, j: number): number  

offset(s: string, n: number, i: number): number  

Properties

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.

Functions

char

Parameters

codepoints: Tuple<number>

Returns

Parameters

str: string

codepoint

Parameters

str: string
Default Value: 1
Default Value: i

Returns

Parameters

Default Value: 1
Default Value: -1

Returns

offset

Parameters

Default Value: 1

Returns

graphemes

Parameters

Returns

nfcnormalize

Parameters

str: string

Returns

nfdnormalize

Parameters

str: string

Returns

Properties

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.