6 function isScope(node) {  argument
7 …return node.type === 'FunctionExpression' || node.type === 'FunctionDeclaration' || node.type === …
9 function isBlockScope(node) {  argument
10   return node.type === 'BlockStatement' || isScope(node);
13 function declaresArguments(node) {  argument
14   return node.type === 'FunctionExpression' || node.type === 'FunctionDeclaration';
17 function declaresThis(node) {  argument
18   return node.type === 'FunctionExpression' || node.type === 'FunctionDeclaration';
43   var declareFunction = function (node) {  argument
44     var fn = node;
46     node.params.forEach(function (node) {  argument
47       declarePattern(node, fn);
49     if (node.id) {
50       fn.locals[node.id.name] = true;
53   var declarePattern = function (node, parent) {  argument
54     switch (node.type) {
56         parent.locals[node.name] = true;
59         node.properties.forEach(function (node) {  argument
60           declarePattern(node.value, parent);
64         node.elements.forEach(function (node) {  argument
65           if (node) declarePattern(node, parent);
69         declarePattern(node.argument, parent);
72         declarePattern(node.left, parent);
76         throw new Error('Unrecognized pattern type: ' + node.type);
79   var declareModuleSpecifier = function (node, parents) {  argument
81     ast.locals[node.local.name] = true;
84     'VariableDeclaration': function (node, parents) {  argument
87         if (node.kind === 'var' ? isScope(parents[i]) : isBlockScope(parents[i])) {
92       node.declarations.forEach(function (declaration) {
96     'FunctionDeclaration': function (node, parents) {  argument
104       parent.locals[node.id.name] = true;
105       declareFunction(node);
108     'ClassDeclaration': function (node, parents) {  argument
116       parent.locals[node.id.name] = true;
118     'TryStatement': function (node) {  argument
119       if (node.handler === null) return;
120       node.handler.locals = node.handler.locals || {};
121       node.handler.locals[node.handler.param.name] = true;
127   function identifier(node, parents) {  argument
128     var name = node.name;
138     node.parents = parents;
139     globals.push(node);
144     'ThisExpression': function (node, parents) {  argument
150       node.parents = parents;
151       globals.push(node);
155   globals.forEach(function (node) {  argument
156     var name = node.type === 'ThisExpression' ? 'this' : node.name;
158     groupedGlobals[name].push(node);