Class: Synvert::Core::Rewriter::WithinScope

Inherits:
Scope
  • Object
show all
Defined in:
lib/synvert/core/rewriter/scope/within_scope.rb

Overview

WithinScope finds out nodes which match nql or rules, then changes its scope to matching node.

Instance Method Summary collapse

Constructor Details

#initialize(instance, nql_or_rules, options = {}) { ... } ⇒ WithinScope

Initialize a WithinScope.

Parameters:

Yields:

  • run on all matching nodes

Raises:

  • (Synvert::Core::NodeQuery::Compiler::ParseError) —

    if the query string is invalid.



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# File 'lib/synvert/core/rewriter/scope/within_scope.rb', line 13

def initialize(instance, nql_or_rules, options = {}, &block)
  super(instance, &block)

  @options = { including_self: true, stop_at_first_match: false, recursive: true }.merge(options)
  @node_query = NodeQuery.new(nql_or_rules, adapter: instance.current_parser)
end

Instance Method Details

#process ⇒ Object

Find out the matching nodes.

It checks the current node and iterates all child nodes, then run the block code on each matching node.



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# File 'lib/synvert/core/rewriter/scope/within_scope.rb', line 24

def process
  current_node = @instance.current_node
  return unless current_node

  matching_nodes = @node_query.query_nodes(current_node, @options)
  @instance.process_with_node current_node do
    matching_nodes.each do |matching_node|
      @instance.process_with_node matching_node do
        @instance.instance_eval(&@block)
      end
    end
  end
end