Utf8.escape

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Escapes a string to a UTF-8 format string. It supports several escape formats, see the formatting table.

Syntax

string utf8.escape ( string input )

Required Arguments

  • input: A string character sequence

Returns

Returns a string containing the escaped UTF-8 characters from the original string.

Formatting

Format Description
%ddd ddd is a decimal number with variable length
%{ddd} same as above, but enclosed in brackets
%uddd same as %ddd, 'u' stands for unicode
%u{ddd} same as above, but enclosed in brackets
%xhhh hexadigit version of %ddd
%x{hhh} same as above, but enclosed in brackets
%? '?' stands for any other character to be escaped

Example

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This example escapes two byte-string literals to UTF-8 format by using the utf8.escape function.

local output = utf8.escape( "%123 %u123 %{123} %u{123} %xABC %x{ABC}" )
print( output ) -- { { { { ઼ ઼

local output = utf8.escape( "%%123 %? %d %%u" )
print( output ) -- %123 ? d %u

See Also