Function applyYield

packages/pug-linker/index.js:162–189

(ast, block)

}

function applyYield(ast, block) {
  if (!block || !block.nodes.length) return ast;
  var replaced = false;
  ast = walk(ast, null, function(node, replace) {
    if (node.type === 'YieldBlock') {
      replaced = true;
      node.type = 'Block';
      node.nodes = [block];
    }
  });
  function defaultYieldLocation(node) {
    var res = node;
    for (var i = 0; i < node.nodes.length; i++) {
      if (node.nodes[i].textOnly) continue;
      if (node.nodes[i].type === 'Block') {
        res = defaultYieldLocation(node.nodes[i]);
      } else if (node.nodes[i].block && node.nodes[i].block.nodes.length) {
        res = defaultYieldLocation(node.nodes[i].block);
      }
    }
    return res;
  }
  if (!replaced) {
    // todo: probably should deprecate this with a warning
    defaultYieldLocation(ast).nodes.push(block);
  }
  return ast;
}

function checkExtendPosition(ast, hasExtends) {
  var legitExtendsReached = false;