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124 lines
2.8 KiB
JavaScript
124 lines
2.8 KiB
JavaScript
"use strict";
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function hex( ch ) {
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return ch.charCodeAt( 0 ).toString( 16 ).toUpperCase();
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}
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function sourceEscape( s ) {
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return s
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.replace( /\0/g, "\\0" ) // null
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.replace( /\x08/g, "\\b" ) // backspace
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.replace( /\t/g, "\\t" ) // horizontal tab
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.replace( /\n/g, "\\n" ) // line feed
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.replace( /\v/g, "\\v" ) // vertical tab
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.replace( /\f/g, "\\f" ) // form feed
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.replace( /\r/g, "\\r" ) // carriage return
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.replace( /[\x00-\x0F]/g, ch => "\\x0" + hex( ch ) )
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.replace( /[\x10-\x1F\x7F-\xFF]/g, ch => "\\x" + hex( ch ) )
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.replace( /[\u0100-\u0FFF]/g, ch => "\\u0" + hex( ch ) )
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.replace( /[\u1000-\uFFFF]/g, ch => "\\u" + hex( ch ) );
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}
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// JavaScript code generation helpers.
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const js = {
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/**
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* ECMA-262, 5th ed., 7.8.4: All characters may appear literally in a string
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* literal except for the closing quote character, backslash, carriage
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* return, line separator, paragraph separator, and line feed. Any character
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* may appear in the form of an escape sequence.
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*
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* For portability, we also escape all control and non-ASCII characters.
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*/
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stringEscape( s ) {
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return sourceEscape( s
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.replace( /\\/g, "\\\\" ) // backslash
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.replace( /"/g, "\\\"" ) // closing double quote
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);
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},
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/**
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* Based on ECMA-262, 5th ed., 7.8.5 & 15.10.1.
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*
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* For portability, we also escape all control and non-ASCII characters.
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*/
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regexpEscape( s ) {
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return sourceEscape( s
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.replace( /\\/g, "\\\\" ) // backslash
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.replace( /\//g, "\\/" ) // closing slash
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.replace( /]/g, "\\]" ) // closing bracket
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.replace( /\^/g, "\\^" ) // caret
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.replace( /-/g, "\\-" ) // dash
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);
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},
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/**
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* This is a list of reserved words for ECMA-262, 5th ed., 7.6.1 (strict mode)
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*/
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reservedWords: [
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// Keyword
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"break",
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"case",
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"catch",
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"continue",
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"debugger",
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"default",
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"delete",
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"do",
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"else",
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"finally",
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"for",
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"function",
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"if",
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"in",
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"instanceof",
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"new",
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"return",
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"switch",
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"this",
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"throw",
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"try",
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"typeof",
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"var",
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"void",
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"while",
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"with",
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// FutureReservedWord
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"class",
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"const",
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"enum",
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"export",
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"extends",
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"implements",
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"import",
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"interface",
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"let",
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"package",
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"private",
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"protected",
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"public",
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"static",
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"super",
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"yield",
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// Literal
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"false",
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"null",
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"true",
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],
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};
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module.exports = js;
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