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# frozen_string_literal: true
require_relative "../ripper"
module Prism
module Translation
class Ripper
# This class mirrors the ::Ripper::SexpBuilder subclass of ::Ripper that
# returns the arrays of [type, *children].
class SexpBuilder < Ripper
# :stopdoc:
attr_reader :error
private
def dedent_element(e, width)
if (n = dedent_string(e[1], width)) > 0
e[2][1] += n
end
e
end
def on_heredoc_dedent(val, width)
sub = proc do |cont|
cont.map! do |e|
if Array === e
case e[0]
when :@tstring_content
e = dedent_element(e, width)
when /_add\z/
e[1] = sub[e[1]]
end
elsif String === e
dedent_string(e, width)
end
e
end
end
sub[val]
val
end
events = private_instance_methods(false).grep(/\Aon_/) {$'.to_sym}
(PARSER_EVENTS - events).each do |event|
module_eval(<<-End, __FILE__, __LINE__ + 1)
def on_#{event}(*args)
args.unshift :#{event}
end
End
end
SCANNER_EVENTS.each do |event|
module_eval(<<-End, __FILE__, __LINE__ + 1)
def on_#{event}(tok)
[:@#{event}, tok, [lineno(), column()]]
end
End
end
def on_error(mesg)
@error = mesg
end
remove_method :on_parse_error
alias on_parse_error on_error
alias compile_error on_error
# :startdoc:
end
# This class mirrors the ::Ripper::SexpBuilderPP subclass of ::Ripper that
# returns the same values as ::Ripper::SexpBuilder except with a couple of
# niceties that flatten linked lists into arrays.
class SexpBuilderPP < SexpBuilder
# :stopdoc:
private
def on_heredoc_dedent(val, width)
val.map! do |e|
next e if Symbol === e and /_content\z/ =~ e
if Array === e and e[0] == :@tstring_content
e = dedent_element(e, width)
elsif String === e
dedent_string(e, width)
end
e
end
val
end
def _dispatch_event_new
[]
end
def _dispatch_event_push(list, item)
list.push item
list
end
def on_mlhs_paren(list)
[:mlhs, *list]
end
def on_mlhs_add_star(list, star)
list.push([:rest_param, star])
end
def on_mlhs_add_post(list, post)
list.concat(post)
end
PARSER_EVENT_TABLE.each do |event, arity|
if /_new\z/ =~ event and arity == 0
alias_method "on_#{event}", :_dispatch_event_new
elsif /_add\z/ =~ event
alias_method "on_#{event}", :_dispatch_event_push
end
end
# :startdoc:
end
end
end
end