Cyrillic loop variable name in ngRepeat not supported by ngParseExt module

[epliskin]

I'm submitting a ...

• bug report
• feature request
• other (Please do not submit support requests here (see above))

Current behavior:

Using ngParseExt module (https://docs.angularjs.org/api/ngParseExt) for Unicode support in HTML,
it is still impossible to introduce a loop variable with cyrillic name into "ngRepeat" directive,
while cyrillic expressions are OK.
Expected / new behavior:

Expecting cyrillic loop variable names to be valid under ngParseExt.

Minimal reproduction of the problem with instructions:

Working HTML: div ng-repeat="f in поля"

Not working HTML: div ng-repeat="п in поля"

Angular version: 1.6.1

Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView ]

Chrome, Edge

Anything else:

Error: [ngRepeat:iidexp] 'item' in 'item in collection' should be an identifier or '(key, value)' expression, but got 'п'.
http://errors.angularjs.org/1.6.1/ngRepeat/iidexp?p0=%D0%BF
at ngRepeatCompile (http://eugene:8080/rnst/2017-04-19/js/lib/angular-1.6.1/angular.js:30701:9)
at applyDirectivesToNode (http://eugene:8080/rnst/2017-04-19/js/lib/angular-1.6.1/angular.js:9444:13)
at compileNodes (http://eugene:8080/rnst/2017-04-19/js/lib/angular-1.6.1/angular.js:8803:9)
at compileNodes (http://eugene:8080/rnst/2017-04-19/js/lib/angular-1.6.1/angular.js:8812:9)
at compile (http://eugene:8080/rnst/2017-04-19/js/lib/angular-1.6.1/angular.js:8684:7)
at lazyCompilation (http://eugene:8080/rnst/2017-04-19/js/lib/angular-1.6.1/angular.js:9131:11)
at boundTranscludeFn (http://eugene:8080/rnst/2017-04-19/js/lib/angular-1.6.1/angular.js:8924:9)
at controllersBoundTransclude (http://eugene:8080/rnst/2017-04-19/js/lib/angular-1.6.1/angular.js:9691:13)
at ngIfWatchAction (http://eugene:8080/rnst/2017-04-19/js/lib/angular-1.6.1/angular.js:27259:15)
at Scope.prototype.$digest (http://eugene:8080/rnst/2017-04-19/js/lib/angular-1.6.1/angular.js:17814:23) ngRepeat: п in поля
angular.js (14328,11)

[Narretz]

Hi,
ngRepeat is using a special micro syntax for this part of the expression, that uses a regex and not the parser, see

angular.js/src/ng/directive/ngRepeat.js

Lines 388 to 393 in 69c3faf

	match = lhs.match(/^(?:(\s*[$\w]+)|\(\s*([$\w]+)\s*,\s*([$\w]+)\s*\))$/);
	if (!match) {
	throw ngRepeatMinErr('iidexp', '\'_item_\' in \'_item_ in _collection_\' should be an identifier or \'(_key_, _value_)\' expression, but got \'{0}\'.',
	lhs);
	}

While this is confusing, I don't think this is in the scope of parseExt - to make it work would definitely require non-trivial effort, as non-unicode matching would have to be available only with parseExt, either via regex or a different parser.

Since this is low frequency, I don't think we will work on this in the future, but PRs are welcome.

[gkalpak]

BTW, similar issues may arise with parts of the ngOptions micro-syntax. I agree that fixing it is probably not worth the effort :/

[epliskin]

Opened a pull request #15954.