Class: SyntaxTree::ERB::MutationVisitor

Inherits:
Object
  • Object
show all
Defined in:
lib/syntax_tree/erb/mutation_visitor.rb

Overview

A base ERB Visitor class that returns a deep copy of the AST. It can be subclassed to mutate some parts of the AST and keep everything else as it was.

Ideally this class (or equivalent) would exist within SyntaxTree::ERB gem.

Direct Known Subclasses

Tailwindcss::ErbMutationVisitor

Instance Method Summary collapse

Instance Method Details

#copy_and_visit_children(node) ⇒ Object Also known as: visit_attribute, visit_block, visit_char_data, visit_closing_tag, visit_doctype, visit_document, visit_erb, visit_erb_block, visit_erb_case, visit_erb_case_when, visit_erb_close, visit_erb_comment, visit_erb_content, visit_erb_do_close, visit_erb_else, visit_erb_end, visit_erb_if, visit_erb_yield, visit_html, visit_html_comment, visit_html_string, visit_new_line, visit_opening_tag, visit_token 



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# File 'lib/syntax_tree/erb/mutation_visitor.rb', line 15

def copy_and_visit_children(node)
  node.dup.tap do |clone|
    clone.instance_variables.each do |name|
      var = clone.instance_variable_get(name)
      clone.instance_variable_set(
        name,
        case var
        when Array
          var.map { |child| visit(child) }
        when SyntaxTree::ERB::Node
          visit(var)
        else
          var
        end
      )
    end
  end
end

#visit(node) ⇒ Object 



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# File 'lib/syntax_tree/erb/mutation_visitor.rb', line 11

def visit(node)
  node&.accept(self)
end