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Versions: 33
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Stored size: 1.37 KB
Contents
# encoding: utf-8
module Mutant
class Matcher
class Method
# Visitor to find last match inside AST
class Finder
# Run finder
#
# @param [Parser::AST::Node]
#
# @return [Parser::AST::Node]
# if found
#
# @return [nil]
# otherwise
#
# @api private
#
#
def self.run(root, &predicate)
new(root, predicate).match
end
private_class_method :new
# Return match
#
# @return [Parser::AST::Node]
#
# @api private
#
attr_reader :match
private
# Initialize object
#
# @param [Parer::AST::Node]
#
# @return [undefined]
#
# @api private
#
#
def initialize(root, predicate)
@root, @predicate = root, predicate
visit(root)
end
# Visit node
#
# @param [Parser::AST::Node] node
#
# @return [undefined]
#
# @api private
#
def visit(node)
if @predicate.call(node)
@match = node
end
node.children.each do |child|
visit(child) if child.kind_of?(Parser::AST::Node)
end
end
end # Finder
end # Method
end # Matcher
end # Mutant
Version data entries
33 entries across 33 versions & 1 rubygems