// Copyright 2009 the Sputnik authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
info: "CharacterEscape :: c ControlLetter"
es5id: 15.10.2.10_A2.1_T3
es6id: B.1.4
description: >
"ControlLetter :: RUSSIAN ALPHABET is incorrect"
Instead, fall back to semantics to match literal "\\c"
features: [generators]
---*/
function* invalidControls() {
// Check upper case Cyrillic
for (var alpha = 0x0410; alpha <= 0x042F; alpha++) {
yield String.fromCharCode(alpha);
}
// Check lower case Cyrillic
for (alpha = 0x0430; alpha <= 0x044F; alpha++) {
yield String.fromCharCode(alpha);
}
// Check ASCII characters which are not in the extended range or syntax
// characters
for (alpha = 0x00; alpha <= 0x7F; alpha++) {
let letter = String.fromCharCode(alpha);
if (!letter.match(/[0-9A-Za-z_\$(|)\[\]\/\\^]/)) {
yield letter;
}
}
// Check for end of string
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);
assert.sameValue(arr, null, `Character ${letter} unreasonably wrapped around as a control character`);
}
arr = re.exec(source.substring(1));
assert.sameValue(arr, null, `invalid \\c escape matched c rather than \\c when followed by ${letter}`);
arr = re.exec(source);
assert.notSameValue(arr, null, `invalid \\c escape failed to match \\c when followed by ${letter}`);
}