26     ast.nodes.forEach(function addNode(node) {  argument
27       if (node.type === 'NamedBlock') {
28         expectedBlocks.push(node);
29       } else if (node.type === 'Block') {
30         node.nodes.forEach(addNode);
31       } else if (node.type === 'Mixin' && node.call === false) {
32         mixins.push(node);
34 …_ROOT', 'Only named blocks and mixins can appear at the top level of an extending template', node);
40     walk(parent, function (node) {  argument
41       if (node.type === 'NamedBlock') {
42         foundBlockNames.push(node.name);
66   walk(ast, function before(node) {  argument
67     if (node.type === 'NamedBlock' && node.mode === 'replace') {
68       definitions[node.name] = definitions[node.name] || [];
69       definitions[node.name].push(node);
88   walk(ast, function before(node) {  argument
89     if (node.type === 'NamedBlock') {
90       if (stack[node.name] === node.name) {
91         return node.ignore = true;
93       stack[node.name] = node.name;
94 … var parentBlockList = parentBlocks[node.name] ? flattenParentBlocks(parentBlocks[node.name]) : [];
96         node.parents = parentBlockList;
98           switch (node.mode) {
100               parentBlock.nodes = parentBlock.nodes.concat(node.nodes);
103               parentBlock.nodes = node.nodes.concat(parentBlock.nodes);
106               parentBlock.nodes = node.nodes;
112   }, function after(node) {  argument
113     if (node.type === 'NamedBlock' && !node.ignore) {
114       delete stack[node.name];
120   return walk(ast, function before(node, replace) {  argument
121     if (node.type === 'RawInclude') {
122       replace({type: 'Text', val: node.file.str.replace(/\r/g, '')});
124   }, function after(node, replace) {  argument
125     if (node.type === 'Include') {
126       var childAST = link(node.file.ast);
130       replace(applyYield(childAST, node.block));
135   return walk(ast, function (node, replace) {  argument
136     if (node.type === 'NamedBlock') {
139         nodes: node.nodes
148   ast = walk(ast, null, function (node, replace) {  argument
149     if (node.type === 'YieldBlock') {
151       node.type = 'Block';
152       node.nodes = [block];
155   function defaultYieldLocation(node) {  argument
156     var res = node;
157     for (var i = 0; i < node.nodes.length; i++) {
158       if (node.nodes[i].textOnly) continue;
159       if (node.nodes[i].type === 'Block') {
160         res = defaultYieldLocation(node.nodes[i]);
161       } else if (node.nodes[i].block && node.nodes[i].block.nodes.length) {
162         res = defaultYieldLocation(node.nodes[i].block);
176   walk(ast, function (node) {  argument
177     if (node.type === 'Extends') {
181 …) should be the first thing in the file. There can only be one extends statement per file.', node);