Function transitionFromUpperToLower

test/fixtures/snapshot/typescript.js:142799–142819

(identifier, index, wordStart)

        return every(identifier, function (ch) { return charIsPunctuation(ch) && ch !== 95 /* CharacterCodes._ */; }, start, end);
    }
    function transitionFromUpperToLower(identifier, index, wordStart) {
        // Cases this supports:
        // 1) IDisposable -> I, Disposable
        // 2) UIElement -> UI, Element
        // 3) HTMLDocument -> HTML, Document
        //
        // etc.
        // We have a transition from an upper to a lower letter here.  But we only
        // want to break if all the letters that preceded are uppercase.  i.e. if we
        // have "Foo" we don't want to break that into "F, oo".  But if we have
        // "IFoo" or "UIFoo", then we want to break that into "I, Foo" and "UI,
        // Foo".  i.e. the last uppercase letter belongs to the lowercase letters
        // that follows.  Note: this will make the following not split properly:
        // "HELLOthere".  However, these sorts of names do not show up in .Net
        // programs.
        return index !== wordStart
            && index + 1 < identifier.length
            && isUpperCaseLetter(identifier.charCodeAt(index))
            && isLowerCaseLetter(identifier.charCodeAt(index + 1))
            && every(identifier, isUpperCaseLetter, wordStart, index);
    }
    function transitionFromLowerToUpper(identifier, word, index) {
        var lastIsUpper = isUpperCaseLetter(identifier.charCodeAt(index - 1));
        var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));