Re-use old AST

[OliverJAsh]

When transforming the AST, it would be useful to re-use part of the old AST so I don't have to manually reconstruct all nodes nested in the part I'm transforming:

module.exports = function(file, api) {
  const j = api.jscodeshift;
  const {expression, statement, statements} = j.template;

  return j(file.source)
    .find(j.Identifier)
    .replaceWith(
      p => j.memberExpression(j.identifier('foo'), p)
    )
    .toSource();
};

Is this possible?

[fkling]

Of course. The builders don't care where the node comes from. But in your example, p is a NodePath. If you want to access the contained AST node, you need to use p.node or p.value.

http://astexplorer.net/#/l4WHRkBGRg

[OliverJAsh]

Thanks!