free_mutant/lib/mutant/mutatee.rb

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module Mutant
# Represent a mutatable AST and its context
class Mutatee
include Veritas::Immutable, Enumerable
# Return context
#
# @return [Context]
#
# @api private
#
attr_reader :context
# Return AST node
#
# @return [Rubinius::AST::Node]
#
# @api private
#
attr_reader :node
# Enumerate possible mutations
#
# @return [self]
# returns self if block given
#
# @return [Enumerator]
# returns eumerator if no block given
#
# @api private
#
def each(&block)
return to_enum unless block_given?
Mutator.each(node,&block)
self
end
# Reset implementation to original
#
# This method inserts the original node again.
#
# @return [self]
#
# @api private
#
def reset
insert(@node)
self
end
private
# Initialize a mutatee
#
# @param [Context] context
# the context of mutations
#
# @param [Rubinius::AST::Node] node
# the node to be mutated
#
# @return [unkown]
#
# @api private
#
def initialize(context,node)
@context,@node = context,node
end
# Insert AST node under context
#
# @param [Rubinius::AST::Node] node
#
# @return [self]
#
# @api private
#
def insert(node)
Loader.load(context.root(node))
self
end
end
end