Function renameCollidingVarNames

test/fixtures/snapshot/typescript.js:151525–151589

(nodeToRename, checker, synthNamesMap)

            It then checks for any collisions and renames them through getSynthesizedDeepClone
        */
        function renameCollidingVarNames(nodeToRename, checker, synthNamesMap) {
            var identsToRenameMap = new ts.Map(); // key is the symbol id
            var collidingSymbolMap = ts.createMultiMap();
            ts.forEachChild(nodeToRename, function visit(node) {
                if (!ts.isIdentifier(node)) {
                    ts.forEachChild(node, visit);
                    return;
                }
                var symbol = checker.getSymbolAtLocation(node);
                if (symbol) {
                    var type = checker.getTypeAtLocation(node);
                    // Note - the choice of the last call signature is arbitrary
                    var lastCallSignature = getLastCallSignature(type, checker);
                    var symbolIdString = ts.getSymbolId(symbol).toString();
                    // If the identifier refers to a function, we want to add the new synthesized variable for the declaration. Example:
                    //   fetch('...').then(response => { ... })
                    // will eventually become
                    //   const response = await fetch('...')
                    // so we push an entry for 'response'.
                    if (lastCallSignature && !ts.isParameter(node.parent) && !ts.isFunctionLikeDeclaration(node.parent) && !synthNamesMap.has(symbolIdString)) {
                        var firstParameter = ts.firstOrUndefined(lastCallSignature.parameters);
                        var ident = (firstParameter === null || firstParameter === void 0 ? void 0 : firstParameter.valueDeclaration)
                            && ts.isParameter(firstParameter.valueDeclaration)
                            && ts.tryCast(firstParameter.valueDeclaration.name, ts.isIdentifier)
                            || ts.factory.createUniqueName("result", 16 /* GeneratedIdentifierFlags.Optimistic */);
                        var synthName = getNewNameIfConflict(ident, collidingSymbolMap);
                        synthNamesMap.set(symbolIdString, synthName);
                        collidingSymbolMap.add(ident.text, symbol);
                    }
                    // We only care about identifiers that are parameters, variable declarations, or binding elements
                    else if (node.parent && (ts.isParameter(node.parent) || ts.isVariableDeclaration(node.parent) || ts.isBindingElement(node.parent))) {
                        var originalName = node.text;
                        var collidingSymbols = collidingSymbolMap.get(originalName);
                        // if the identifier name conflicts with a different identifier that we've already seen
                        if (collidingSymbols && collidingSymbols.some(function (prevSymbol) { return prevSymbol !== symbol; })) {
                            var newName = getNewNameIfConflict(node, collidingSymbolMap);
                            identsToRenameMap.set(symbolIdString, newName.identifier);
                            synthNamesMap.set(symbolIdString, newName);
                            collidingSymbolMap.add(originalName, symbol);
                        }
                        else {
                            var identifier = ts.getSynthesizedDeepClone(node);
                            synthNamesMap.set(symbolIdString, createSynthIdentifier(identifier));
                            collidingSymbolMap.add(originalName, symbol);
                        }
                    }
                }
            });
            return ts.getSynthesizedDeepCloneWithReplacements(nodeToRename, /*includeTrivia*/ true, function (original) {
                if (ts.isBindingElement(original) && ts.isIdentifier(original.name) && ts.isObjectBindingPattern(original.parent)) {
                    var symbol = checker.getSymbolAtLocation(original.name);
                    var renameInfo = symbol && identsToRenameMap.get(String(ts.getSymbolId(symbol)));
                    if (renameInfo && renameInfo.text !== (original.name || original.propertyName).getText()) {
                        return ts.factory.createBindingElement(original.dotDotDotToken, original.propertyName || original.name, renameInfo, original.initializer);
                    }
                }
                else if (ts.isIdentifier(original)) {
                    var symbol = checker.getSymbolAtLocation(original);