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|
#
# dummyparser.rb
#
require 'ripper'
class Node
def initialize(name, *nodes)
@name = name
@children = nodes
end
attr_reader :name, :children
def to_s
"#{@name}(#{Node.trim_nil(@children).map {|n| n.to_s }.join(',')})"
end
def self.trim_nil(list)
if !list.empty? and list.last.nil?
list = list[0...-1]
list.pop while !list.empty? and list.last.nil?
end
list
end
end
class NodeList
def initialize(list = [])
@list = list
end
attr_reader :list
def push(item)
@list.push item
self
end
def prepend(items)
@list.unshift items
end
def to_s
"[#{@list.join(',')}]"
end
end
class DummyParser < Ripper
def hook(*names)
class << self; self; end.class_eval do
names.each do |name|
define_method(name) do |*a, &b|
result = super(*a, &b)
yield(name, *a)
result
end
end
end
self
end
def on_program(stmts)
stmts
end
def on_stmts_new
NodeList.new
end
def on_stmts_add(stmts, st)
stmts.push st
stmts
end
def on_void_stmt
Node.new('void')
end
def on_var_ref(name)
Node.new('ref', name)
end
def on_var_alias(a, b)
Node.new('valias', a, b)
end
def on_alias_error(a)
Node.new('aliaserr', a)
end
def on_arg_paren(args)
args
end
def on_args_new
NodeList.new
end
def on_args_add(list, arg)
list.push(arg)
end
def on_args_add_block(list, blk)
if blk
list.push('&' + blk.to_s)
else
list
end
end
def on_args_add_star(list, arg)
list.push('*' + arg.to_s)
end
def on_args_prepend(list, args)
list.prepend args
list
end
def on_method_add_arg(m, arg)
if arg == nil
arg = on_args_new
end
m.children.push arg
m
end
def on_method_add_block(m, b)
on_args_add_block(m.children, b)
m
end
def on_paren(params)
params
end
def on_brace_block(params, code)
Node.new('block', params, code)
end
def on_block_var(params, shadow)
params
end
def on_rest_param(var)
"*#{var}"
end
def on_blockarg(var)
"&#{var}"
end
def on_params(required, optional, rest, more, keyword, keyword_rest, block)
args = NodeList.new
required.each do |req|
args.push(req)
end if required
optional.each do |var, val|
args.push("#{var}=#{val}")
end if optional
args.push(rest) if rest
more.each do |m|
args.push(m)
end if more
args.push(block) if block
args
end
def on_assoc_new(a, b)
Node.new('assoc', a, b)
end
def on_bare_assoc_hash(assoc_list)
Node.new('assocs', *assoc_list)
end
def on_assoclist_from_args(a)
Node.new('assocs', *a)
end
def on_word_new
""
end
def on_word_add(word, w)
word << w
end
def on_words_new
NodeList.new
end
def on_words_add(words, word)
words.push word
end
def on_qwords_new
NodeList.new
end
def on_qwords_add(words, word)
words.push word
end
def on_rescue(exc, *rest)
Node.new('rescue', (exc && NodeList.new(exc)), *rest)
end
(Ripper::PARSER_EVENTS.map(&:to_s) - instance_methods(false).map {|n|n.to_s.sub(/^on_/, '')}).each do |event|
define_method(:"on_#{event}") do |*args|
Node.new(event, *args)
end
end
end
|
