blob: 9a81b704ebcbf7259483683d4d32709dbb4450b2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
|
module Prism
# This visitor walks through the tree and copies each node as it is being
# visited. This is useful for consumers that want to mutate the tree, as you
# can change subtrees in place without effecting the rest of the tree.
class MutationCompiler < Compiler
<%- nodes.each_with_index do |node, index| -%>
<%= "\n" if index != 0 -%>
# Copy a <%= node.name %> node
def visit_<%= node.human %>(node)
<%- fields = node.fields.select { |field| [Prism::NodeField, Prism::OptionalNodeField, Prism::NodeListField].include?(field.class) } -%>
<%- if fields.any? -%>
node.copy(<%= fields.map { |field| "#{field.name}: #{field.is_a?(Prism::NodeListField) ? "visit_all" : "visit"}(node.#{field.name})" }.join(", ") %>)
<%- else -%>
node.copy
<%- end -%>
end
<%- end -%>
end
end
|
