Module: IRB::InputCompletor

Defined in:
lib/irb/completion.rb

Overview

:nodoc:

Constant Summary collapse

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
]
BASIC_WORD_BREAK_CHARACTERS =
" \t\n`><=;|&{("
CompletionProc =
proc { |input|
  retrieve_completion_data(input).compact.map{ |i| i.encode(Encoding.default_external) }
}
PerfectMatchedProc =
->(matched) {
  RDocRIDriver ||= RDoc::RI::Driver.new
  if matched =~ /\A(?:::)?RubyVM/ and not ENV['RUBY_YES_I_AM_NOT_A_NORMAL_USER']
    File.open(File.join(__dir__, 'ruby_logo.aa')) do |f|
      RDocRIDriver.page do |io|
        IO.copy_stream(f, io)
      end
    end
    return
  end
  namespace = retrieve_completion_data(matched, doc_namespace: true)
  return unless matched
  if namespace.is_a?(Array)
    out = RDoc::Markup::Document.new
    namespace.each do |m|
      begin
        RDocRIDriver.add_method(out, m)
      rescue RDoc::RI::Driver::NotFoundError
      end
    end
    RDocRIDriver.display(out)
  else
    begin
      RDocRIDriver.display_names([namespace])
    rescue RDoc::RI::Driver::NotFoundError
    end
  end
}
Operators =

Set of available operators in Ruby

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

Class Method Summary collapse

Class Method Details

.ignored_modulesObject


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# File 'lib/irb/completion.rb', line 312

def self.ignored_modules
  # We could cache the result, but this is very fast already.
  # By using this approach, we avoid Module#name calls, which are
  # relatively slow when there are a lot of anonymous modules defined.
  s = {}

  scanner = lambda do |m|
    next if s.include?(m) # IRB::ExtendCommandBundle::EXCB recurses.
    s[m] = true
    m.constants(false).each do |c|
      value = m.const_get(c)
      scanner.call(value) if value.is_a?(Module)
    end
  end

  %i(IRB RubyLex).each do |sym|
    next unless Object.const_defined?(sym)
    scanner.call(Object.const_get(sym))
  end

  s.delete(IRB::Context) if defined?(IRB::Context)

  s
end

.retrieve_completion_data(input, bind: IRB.conf[:MAIN_CONTEXT].workspace.binding, doc_namespace: false) ⇒ Object


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# File 'lib/irb/completion.rb', line 45

def self.retrieve_completion_data(input, bind: IRB.conf[:MAIN_CONTEXT].workspace.binding, doc_namespace: false)
  case input
  when /^((["'`]).*\2)\.([^.]*)$/
    # String
    receiver = $1
    message = Regexp.quote($3)

    candidates = String.instance_methods.collect{|m| m.to_s}
    if doc_namespace
      "String.#{message}"
    else
      select_message(receiver, message, candidates)
    end

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

    candidates = Regexp.instance_methods.collect{|m| m.to_s}
    if doc_namespace
      "Regexp.#{message}"
    else
      select_message(receiver, message, candidates)
    end

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

    candidates = Array.instance_methods.collect{|m| m.to_s}
    if doc_namespace
      "Array.#{message}"
    else
      select_message(receiver, message, candidates)
    end

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

    proc_candidates = Proc.instance_methods.collect{|m| m.to_s}
    hash_candidates = Hash.instance_methods.collect{|m| m.to_s}
    if doc_namespace
      ["Proc.#{message}", "Hash.#{message}"]
    else
      select_message(receiver, message, proc_candidates | hash_candidates)
    end

  when /^(:[^:.]*)$/
    # Symbol
    return nil if doc_namespace
    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}
    if doc_namespace
      candidates.find { |i| i == receiver }
    else
      candidates.grep(/^#{receiver}/).collect{|e| "::" + e}
    end

  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
    if doc_namespace
      "#{receiver}::#{message}"
    else
      select_message(receiver, message, candidates, "::")
    end

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

    candidates = Symbol.instance_methods.collect{|m| m.to_s}
    if doc_namespace
      "Symbol.#{message}"
    else
      select_message(receiver, message, candidates, sep)
    end

  when /^(?<num>-?(0[dbo])?[0-9_]+(\.[0-9_]+)?(([eE][+-]?[0-9]+)?i?|r)?)(?<sep>\.|::)(?<mes>[^.]*)$/
    # Numeric
    receiver = $~[:num]
    sep = $~[:sep]
    message = Regexp.quote($~[:mes])

    begin
      instance = eval(receiver, bind)
      if doc_namespace
        "#{instance.class.name}.#{message}"
      else
        candidates = instance.methods.collect{|m| m.to_s}
        select_message(receiver, message, candidates, sep)
      end
    rescue Exception
      if doc_namespace
        nil
      else
        candidates = []
      end
    end

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

    begin
      instance = eval(receiver, bind)
      if doc_namespace
        "#{instance.class.name}.#{message}"
      else
        candidates = instance.methods.collect{|m| m.to_s}
        select_message(receiver, message, candidates, sep)
      end
    rescue Exception
      if doc_namespace
        nil
      else
        candidates = []
      end
    end

  when /^(\$[^.]*)$/
    # global var
    gvar = $1
    all_gvars = global_variables.collect{|m| m.to_s}
    if doc_namespace
      all_gvars.find{ |i| i == gvar }
    else
      all_gvars.grep(Regexp.new(Regexp.quote(gvar)))
    end

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

    gv = eval("global_variables", bind).collect{|m| m.to_s}.append("true", "false", "nil")
    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 = []
      to_ignore = ignored_modules
      ObjectSpace.each_object(Module){|m|
        next if (to_ignore.include?(m) rescue true)
        candidates.concat m.instance_methods(false).collect{|x| x.to_s}
      }
      candidates.sort!
      candidates.uniq!
    end
    if doc_namespace
      "#{rec.class.name}#{sep}#{candidates.find{ |i| i == message }}"
    else
      select_message(receiver, message, candidates, sep)
    end

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

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

    candidates = String.instance_methods(true).collect{|m| m.to_s}
    if doc_namespace
      "String.#{candidates.find{ |i| i == message }}"
    else
      select_message(receiver, message, candidates)
    end

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

    if doc_namespace
      candidates.find{ |i| i == input }
    else
      candidates.grep(/^#{Regexp.quote(input)}/)
    end
  end
end

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


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# File 'lib/irb/completion.rb', line 300

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