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// |jit-test| skip-if: typeof Intl === 'undefined'
// See https://tc39.es/ecma262/#sec-runtime-semantics-canonicalize-ch
function Canonicalize(ch) {
var u = ch.toUpperCase();
if (u.length > 1) return ch;
var cu = u.charCodeAt(0);
if (ch.charCodeAt(0) >= 128 && cu < 128) return ch;
return cu;
}
function TestEquivalenceClass(eclass) {
var backref = /(.)\1/i;
for (var i = 0; i < eclass.length; i++) {
for (var j = 0; j < eclass.length; j++) {
if (i == j) continue;
var c1 = eclass[i];
var c2 = eclass[j];
var cc = c1 + c2;
var shouldMatch = Canonicalize(c1) === Canonicalize(c2);
assertEq(backref.test(cc), shouldMatch);
}
}
}
function TestAll() {
for (var eclass of equivalence_classes) {
TestEquivalenceClass(eclass);
}
}
// Interesting case-folding equivalence classes (as determined by
// ICU's UnicodeSet::closeOver). A class is interesting if it contains
// more than two characters, or if it contains any characters in
// IgnoreSet or SpecialAddSet as defined in new-regexp/special-case.h.
var equivalence_classes = [
'\u0041\u0061', // Aa (sanity check)
'\u004b\u006b\u212a', // KkK
'\u0053\u0073\u017f', // Ssſ
'\u00b5\u039c\u03bc', // µΜμ
'\u00c5\u00e5\u212b', // ÅåÅ
'\u00df\u1e9e', // ßẞ
'\u03a9\u03c9\u2126', // ΩωΩ
'\u0390\u1fd3', // ΐΐ
'\u0398\u03b8\u03d1\u03f4', // Θθϑϴ
'\u03b0\u1fe3', // ΰΰ
'\u1f80\u1f88', // ᾀᾈ
'\u1fb3\u1fbc', // ᾳᾼ
'\u1fc3\u1fcc', // ῃῌ
'\u1ff3\u1ffc', // ῳῼ
'\ufb05\ufb06', // ſtst
// Everything below this line is a well-behaved case-folding
// equivalence class with more than two characters but only one
// canonical case-folded character
'\u01c4\u01c5\u01c6', '\u01c7\u01c8\u01c9', '\u01ca\u01cb\u01cc',
'\u01f1\u01f2\u01f3', '\u0345\u0399\u03b9\u1fbe', '\u0392\u03b2\u03d0',
'\u0395\u03b5\u03f5', '\u039a\u03ba\u03f0', '\u03a0\u03c0\u03d6',
'\u03a1\u03c1\u03f1', '\u03a3\u03c2\u03c3', '\u03a6\u03c6\u03d5',
'\u0412\u0432\u1c80', '\u0414\u0434\u1c81', '\u041e\u043e\u1c82',
'\u0421\u0441\u1c83', '\u0422\u0442\u1c84\u1c85', '\u042a\u044a\u1c86',
'\u0462\u0463\u1c87', '\u1c88\ua64a\ua64b', '\u1e60\u1e61\u1e9b'
];
TestAll();
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