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// Copyright 2017 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: prod-annexB-ClassAtomNoDash
description: >
Character classes containing an invalid control escape behave like [\\c]
info: |
ClassAtomNoDash :: `\`
The production ClassAtomNoDash :: `\` evaluates as follows:
1. Return the CharSet containing the single character `\`.
features: [generators]
---*/
function* invalidControls() {
// Check ASCII characters which are not in the extended range or syntax
// characters
for (let alpha = 0x00; alpha <= 0x7F; alpha++) {
let letter = String.fromCharCode(alpha);
if (!letter.match(/[0-9A-Za-z_\$(|)\[\]\/\\^]/)) {
yield letter;
}
}
yield "";
}
for (let letter of invalidControls()) {
var source = "[\\c" + letter + "]";
var re = new RegExp(source);
if (letter.length > 0) {
var char = letter.charCodeAt(0);
var str = String.fromCharCode(char % 32);
var arr = re.exec(str);
if (str !== letter && arr !== null) {
$ERROR(`Character ${letter} unreasonably wrapped around as a control character`);
}
arr = re.exec(letter);
if (arr === null) {
$ERROR(`Character ${letter} missing from character class ${source}`);
}
}
arr = re.exec("\\")
if (arr === null) {
$ERROR(`Character \\ missing from character class ${source}`);
}
arr = re.exec("c")
if (arr === null) {
$ERROR(`Character c missing from character class ${source}`);
}
}
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