Module: IRB::InputCompletor

Defined in:

lib/irb/completion.rb

Overview

:nodoc:

Constant Summary

ReservedWords =

Set of reserved words used by Ruby, you should not use these for constants or variables

%w[
  BEGIN END
  alias and
  begin break
  case class
  def defined do
  else elsif end ensure
  false for
  if in
  module
  next nil not
  or
  redo rescue retry return
  self super
  then true
  undef unless until
  when while
  yield
]

CompletionProc =

proc { |input|
  bind = IRB.conf[:MAIN_CONTEXT].workspace.binding

#      puts "input: #{input}"

  case input
  when /^((["'`]).*\2)\.([^.]*)$/
	# String
	receiver = $1
	message = Regexp.quote($3)

	candidates = String.instance_methods.collect{|m| m.to_s}
	select_message(receiver, message, candidates)

  when /^(\/[^\/]*\/)\.([^.]*)$/
	# Regexp
	receiver = $1
	message = Regexp.quote($2)

	candidates = Regexp.instance_methods.collect{|m| m.to_s}
	select_message(receiver, message, candidates)

  when /^([^\]]*\])\.([^.]*)$/
	# Array
	receiver = $1
	message = Regexp.quote($2)

	candidates = Array.instance_methods.collect{|m| m.to_s}
	select_message(receiver, message, candidates)

  when /^([^\}]*\})\.([^.]*)$/
	# Proc or Hash
	receiver = $1
	message = Regexp.quote($2)

	candidates = Proc.instance_methods.collect{|m| m.to_s}
	candidates |= Hash.instance_methods.collect{|m| m.to_s}
	select_message(receiver, message, candidates)

  when /^(:[^:.]*)$/
 	# Symbol
	if Symbol.respond_to?(:all_symbols)
	  sym = $1
	  candidates = Symbol.all_symbols.collect{|s| ":" + s.id2name}
	  candidates.grep(/^#{Regexp.quote(sym)}/)
	else
	  []
	end

  when /^::([A-Z][^:\.\(]*)$/
	# Absolute Constant or class methods
	receiver = $1
	candidates = Object.constants.collect{|m| m.to_s}
	candidates.grep(/^#{receiver}/).collect{|e| "::" + e}

#      when /^(((::)?[A-Z][^:.\(]*)+)::?([^:.]*)$/
  when /^([A-Z].*)::([^:.]*)$/
	# Constant or class methods
	receiver = $1
	message = Regexp.quote($2)
	begin
	  candidates = eval("#{receiver}.constants.collect{|m| m.to_s}", bind)
	  candidates |= eval("#{receiver}.methods.collect{|m| m.to_s}", bind)
	rescue Exception
	  candidates = []
	end
	select_message(receiver, message, candidates, "::")

  when /^(:[^:.]+)(\.|::)([^.]*)$/
	# Symbol
	receiver = $1
	sep = $2
	message = Regexp.quote($3)

	candidates = Symbol.instance_methods.collect{|m| m.to_s}
	select_message(receiver, message, candidates, sep)

  when /^(-?(0[dbo])?[0-9_]+(\.[0-9_]+)?([eE]-?[0-9]+)?)(\.|::)([^.]*)$/
	# Numeric
	receiver = $1
	sep = $5
	message = Regexp.quote($6)

	begin
	  candidates = eval(receiver, bind).methods.collect{|m| m.to_s}
	rescue Exception
	  candidates = []
	end
	select_message(receiver, message, candidates, sep)

  when /^(-?0x[0-9a-fA-F_]+)(\.|::)([^.]*)$/
	# Numeric(0xFFFF)
	receiver = $1
	sep = $2
	message = Regexp.quote($3)

	begin
	  candidates = eval(receiver, bind).methods.collect{|m| m.to_s}
	rescue Exception
	  candidates = []
	end
	select_message(receiver, message, candidates, sep)

  when /^(\$[^.]*)$/
	# global var
	regmessage = Regexp.new(Regexp.quote($1))
	candidates = global_variables.collect{|m| m.to_s}.grep(regmessage)

#      when /^(\$?(\.?[^.]+)+)\.([^.]*)$/
#      when /^((\.?[^.]+)+)\.([^.]*)$/
#      when /^([^."].*)\.([^.]*)$/
  when /^([^."].*)(\.|::)([^.]*)$/
	# variable.func or func.func
	receiver = $1
	sep = $2
	message = Regexp.quote($3)

	gv = eval("global_variables", bind).collect{|m| m.to_s}
	lv = eval("local_variables", bind).collect{|m| m.to_s}
	iv = eval("instance_variables", bind).collect{|m| m.to_s}
	cv = eval("self.class.constants", bind).collect{|m| m.to_s}

	if (gv | lv | iv | cv).include?(receiver) or /^[A-Z]/ =~ receiver && /\./ !~ receiver
	  # foo.func and foo is var. OR
	  # foo::func and foo is var. OR
	  # foo::Const and foo is var. OR
	  # Foo::Bar.func
	  begin
 candidates = []
 rec = eval(receiver, bind)
 if sep == "::" and rec.kind_of?(Module)
   candidates = rec.constants.collect{|m| m.to_s}
 end
 candidates |= rec.methods.collect{|m| m.to_s}
	  rescue Exception
 candidates = []
	  end
	else
	  # func1.func2
	  candidates = []
	  ObjectSpace.each_object(Module){|m|
 begin
   name = m.name
 rescue Exception
   name = ""
 end
        begin
          next if name != "IRB::Context" and
            /^(IRB|SLex|RubyLex|RubyToken)/ =~ name
        rescue Exception
          next
        end
 candidates.concat m.instance_methods(false).collect{|x| x.to_s}
	  }
	  candidates.sort!
	  candidates.uniq!
	end
	select_message(receiver, message, candidates, sep)

  when /^\.([^.]*)$/
	# unknown(maybe String)

	receiver = ""
	message = Regexp.quote($1)

	candidates = String.instance_methods(true).collect{|m| m.to_s}
	select_message(receiver, message, candidates)

  else
	candidates = eval("methods | private_methods | local_variables | instance_variables | self.class.constants", bind).collect{|m| m.to_s}

	(candidates|ReservedWords).grep(/^#{Regexp.quote(input)}/)
  end
}

Operators =

Set of available operators in Ruby

%w[% & * ** + - / < << <= <=> == === =~ > >= >> [] []= ^ ! != !~]

Class Method Summary

• .select_message(receiver, message, candidates, sep = ".") ⇒ Object

Class Method Details

.select_message(receiver, message, candidates, sep = ".") ⇒ Object

# File 'lib/irb/completion.rb', line 216

def self.select_message(receiver, message, candidates, sep = ".")
  candidates.grep(/^#{message}/).collect do |e|
	case e
	when /^[a-zA-Z_]/
	  receiver + sep + e
	when /^[0-9]/
	when *Operators
	  #receiver + " " + e
	end
  end
end