Class: IRB::Context

Relationships & Source Files
Inherits:	Object
Defined in:	lib/irb/context.rb, lib/irb/ext/change-ws.rb, lib/irb/ext/eval_history.rb, lib/irb/ext/use-loader.rb, lib/irb/ext/workspaces.rb

Overview

A class that wraps the current state of the irb session, including the configuration of conf.

Constant Summary

ASSIGN_OPERATORS_REGEXP =
# File 'lib/irb/context.rb', line 19

Regexp.union(%w[= += -= *= /= %= **= &= |= &&= ||= ^= <<= >>=])

IDNAME_IVARS = Internal use only
# File 'lib/irb/context.rb', line 682
```
["@prompt_mode"]
```
KERNEL_METHOD =
# File 'lib/irb/context.rb', line 17
```
::Kernel.instance_method(:method)
```
KERNEL_PUBLIC_METHOD =
# File 'lib/irb/context.rb', line 16
```
::Kernel.instance_method(:public_method)
```
NOPRINTING_IVARS = Internal use only
# File 'lib/irb/context.rb', line 680
```
["@last_value"]
```
NO_INSPECTING_IVARS = Internal use only
# File 'lib/irb/context.rb', line 681
```
["@irb", "@io"]
```

Class Method Summary

.new(irb, workspace = nil, input_method = nil) ⇒ Context constructor

Creates a new ::IRB context.

Instance Attribute Summary

#ap_name rw

A copy of the default IRB.conf[:AP_NAME].
#auto_indent_mode rw

Can be either the default IRB.conf[:AUTO_INDENT], or the mode set by #prompt_mode=
#back_trace_limit rw

The limit of backtrace lines displayed as top n and tail n.
#command_aliases rw

User-defined ::IRB command aliases.
#echo? rw

Alias for #echo.
#echo_on_assignment? rw

Alias for #echo_on_assignment.
#eval_history rw

The command result history limit.
#eval_history=(no) rw

Sets command result history limit.
#extra_doc_dirs rw

Specify the installation locations of the ri file to be displayed in the document dialog.
#file_input? ⇒ Boolean readonly

Whether #io uses a File for the input_method passed when creating the current context, see .new
#from_binding? ⇒ Boolean readonly
#history_file rw

A copy of the default IRB.conf[:HISTORY_FILE].
#history_file=(hist) rw

Set IRB.conf[:HISTORY_FILE] to the given hist.
#ignore_eof? rw

Alias for #ignore_eof.
#ignore_sigint? rw

Alias for #ignore_sigint.
#inspect? ⇒ Boolean readonly

Whether #inspect_mode is set or not, see #inspect_mode= for more detail.
#inspect_mode rw

A copy of the default IRB.conf[:INSPECT_MODE].
#inspect_mode=(opt) rw

Specifies the inspect mode with opt:
#io rw

The current input method.
#irb rw

Current irb session.
#irb_name rw

Can be either name from IRB.conf[:IRB_NAME], or the number of the current job set by JobManager, such as irb#2.
#irb_path rw

Can be one of the following: - the #irb_name surrounded by parenthesis - the input_method passed to .new - the file path of the current ::IRB context in a binding.irb session.
#irb_path=(path) rw

Sets @irb_path to the given path as well as @eval_path It’s the same as irb_path, but with the ::IRB name postfix This makes sure users can distinguish the methods defined in the ::IRB session from the methods defined in the current file’s context, especially with binding.irb.
#last_value readonly

The return value of the last statement evaluated.
#load_modules rw

A copy of the default IRB.conf[:LOAD_MODULES].
#newline_before_multiline_output? rw

Alias for #newline_before_multiline_output.
#prompt_c rw

::IRB prompt for continuated statement.
#prompt_i rw

Standard IRB prompt.
#prompt_mode rw

A copy of the default IRB.conf[:PROMPT_MODE].
#prompt_mode=(mode) rw

Sets the mode of the prompt in this context.
#prompt_n rw

TODO: Remove this when developing v2.0.
#prompt_n=(_) rw

TODO: Remove this when developing v2.0.
#prompt_s rw

::IRB prompt for continuated strings.
#prompting? ⇒ Boolean readonly

Whether #verbose? is true, and input_method is either StdioInputMethod or RelineInputMethod or ReadlineInputMethod, see #io for more information.
#rc? rw

Alias for #rc.
#return_format rw

The format of the return statement, set by #prompt_mode= using the :RETURN of the mode passed to set the current #prompt_mode.
#save_history rw
#save_history=(val) rw
#thread readonly

The current thread in this context.
#use_autocomplete? readonly

Alias for #use_autocomplete.
#use_loader=(opt) rw

Sets IRB.conf[:USE_LOADER].
#use_loader? rw

Alias for #use_loader.
#use_multiline? readonly

Alias for #use_multiline.
#use_readline readonly

Alias for #use_singleline.
#use_readline? readonly

Alias for #use_singleline.
#use_reline readonly

Alias for #use_multiline.
#use_reline? readonly

Alias for #use_multiline.
#use_singleline? readonly

Alias for #use_singleline.
#use_tracer=(val) writeonly
#verbose rw

Whether verbose messages are displayed or not.
#verbose? ⇒ Boolean rw

Returns whether messages are displayed or not.
#with_debugger rw
#workspace_home readonly

The toplevel workspace, see #home_workspace
#term_interactive? ⇒ Boolean readonly private

Instance Method Summary

#__inspect__
#__to_s__
#_set_last_value(value)

Alias for #set_last_value.
#change_workspace(*_main)

Changes the current workspace to given object or binding.
#colorize_input(input, complete:)
#echo (also: #echo?) rw

Whether to echo the return value to output or not.
#echo_on_assignment (also: #echo_on_assignment?) rw

Whether to echo for assignment expressions.
#home_workspace

Inherited from TOPLEVEL_BINDING.
#ignore_eof (also: #ignore_eof?) rw

Whether ^D (control-d) will be ignored or not.
#ignore_sigint (also: #ignore_sigint?) rw

Whether ^C (control-c) will be ignored or not.
#main

The top-level workspace, see WorkSpace#main
#newline_before_multiline_output (also: #newline_before_multiline_output?) rw

Whether a newline is put before multiline output.
#parse_command(code)
#pop_workspace

Removes the last element from the current #workspaces stack and returns it, or nil if the current workspace stack is empty.
#push_workspace(*_main)

Creates a new workspace with the given object or binding, and appends it onto the current #workspaces stack.
#rc (also: #rc?) rw

A copy of the default IRB.conf[:RC].
#replace_workspace(workspace)

Replace the current workspace with the given #workspace.
#safe_method_call_on_main(method_name)
#set_last_value(value) (also: #_set_last_value)

Sets the return value from the last statement evaluated in this context to #last_value.
#to_s

Alias for #inspect.
#use_autocomplete (also: #use_autocomplete?) readonly

Whether colorization is enabled or not.
#use_loader (also: #use_loader?) rw

Returns whether #irb‘s own file reader method is used by load+/+require or not.
#use_multiline (also: #use_multiline?, #use_reline, #use_reline?) readonly

Whether multiline editor mode is enabled or not.
#use_singleline (also: #use_singleline?, #use_readline, #use_readline?) readonly

Whether singleline editor mode is enabled or not.
#workspace

Workspace in the current context.
#build_completor private
#build_type_completor(verbose:) private
#evaluate(statement, line_no) Internal use only
#evaluate_expression(code, line_no) Internal use only
#inspect (also: #to_s) readonly Internal use only
#inspect_last_value Internal use only
#local_variables Internal use only

Constructor Details

.new(irb, workspace = nil, input_method = nil) ⇒ `Context`

Creates a new ::IRB context.

The optional input_method argument:

nil: uses stdin or Reline or Readline
String: uses a File
other: uses this as InputMethod

[ GitHub ]

# File 'lib/irb/context.rb', line 27


def initialize(irb, workspace = nil, input_method = nil)
  @irb = irb
  @workspace_stack = []
  if workspace
    @workspace_stack << workspace
  else
    @workspace_stack << WorkSpace.new
  end
  @thread = Thread.current

  # copy of default configuration
  @ap_name = IRB.conf[:AP_NAME]
  @rc = IRB.conf[:RC]
  @load_modules = IRB.conf[:LOAD_MODULES]

  if IRB.conf.has_key?(:USE_SINGLELINE)
    @use_singleline = IRB.conf[:USE_SINGLELINE]
  elsif IRB.conf.has_key?(:USE_READLINE) # backward compatibility
    @use_singleline = IRB.conf[:USE_READLINE]
  else
    @use_singleline = nil
  end
  if IRB.conf.has_key?(:USE_MULTILINE)
    @use_multiline = IRB.conf[:USE_MULTILINE]
  elsif IRB.conf.has_key?(:USE_RELINE) # backward compatibility
    warn <<~MSG.strip
      USE_RELINE is deprecated, please use USE_MULTILINE instead.
    MSG
    @use_multiline = IRB.conf[:USE_RELINE]
  elsif IRB.conf.has_key?(:USE_REIDLINE)
    warn <<~MSG.strip
      USE_REIDLINE is deprecated, please use USE_MULTILINE instead.
    MSG
    @use_multiline = IRB.conf[:USE_REIDLINE]
  else
    @use_multiline = nil
  end
  @use_autocomplete = IRB.conf[:USE_AUTOCOMPLETE]
  @verbose = IRB.conf[:VERBOSE]
  @io = nil

  self.inspect_mode = IRB.conf[:INSPECT_MODE]
  self.use_tracer = IRB.conf[:USE_TRACER]
  self.use_loader = IRB.conf[:USE_LOADER] if IRB.conf[:USE_LOADER]
  self.eval_history = IRB.conf[:EVAL_HISTORY] if IRB.conf[:EVAL_HISTORY]

  @ignore_sigint = IRB.conf[:IGNORE_SIGINT]
  @ignore_eof = IRB.conf[:IGNORE_EOF]

  @back_trace_limit = IRB.conf[:BACK_TRACE_LIMIT]

  self.prompt_mode = IRB.conf[:PROMPT_MODE]

  @irb_name = IRB.conf[:IRB_NAME]

  unless IRB.conf[:SINGLE_IRB] or !defined?(IRB::JobManager)
    @irb_name = @irb_name + "#" + IRB.JobManager.n_jobs.to_s
  end

  self.irb_path = "(" + @irb_name + ")"

  case input_method
  when nil
    @io = nil
    case use_multiline?
    when nil
      if term_interactive? && IRB.conf[:PROMPT_MODE] != :INF_RUBY && !use_singleline?
        # Both of multiline mode and singleline mode aren't specified.
        @io = RelineInputMethod.new(build_completor)
      else
        @io = nil
      end
    when false
      @io = nil
    when true
      @io = RelineInputMethod.new(build_completor)
    end
    unless @io
      case use_singleline?
      when nil
        if (defined?(ReadlineInputMethod) && term_interactive? &&
            IRB.conf[:PROMPT_MODE] != :INF_RUBY)
          @io = ReadlineInputMethod.new
        else
          @io = nil
        end
      when false
        @io = nil
      when true
        if defined?(ReadlineInputMethod)
          @io = ReadlineInputMethod.new
        else
          @io = nil
        end
      else
        @io = nil
      end
    end
    @io = StdioInputMethod.new unless @io

  when '-'
    @io = FileInputMethod.new($stdin)
    @irb_name = '-'
    self.irb_path = '-'
  when String
    @io = FileInputMethod.new(input_method)
    @irb_name = File.basename(input_method)
    self.irb_path = input_method
  else
    @io = input_method
  end
  @extra_doc_dirs = IRB.conf[:EXTRA_DOC_DIRS]

  @echo = IRB.conf[:ECHO]
  if @echo.nil?
    @echo = true
  end

  @echo_on_assignment = IRB.conf[:ECHO_ON_ASSIGNMENT]
  if @echo_on_assignment.nil?
    @echo_on_assignment = :truncate
  end

  @newline_before_multiline_output = IRB.conf[:NEWLINE_BEFORE_MULTILINE_OUTPUT]
  if @newline_before_multiline_output.nil?
    @newline_before_multiline_output = true
  end

  @command_aliases = IRB.conf[:COMMAND_ALIASES].dup
end

Instance Attribute Details

#ap_name (rw)

A copy of the default IRB.conf[:AP_NAME]

[ GitHub ]

# File 'lib/irb/context.rb', line 267


attr_accessor :ap_name

#auto_indent_mode (rw)

Can be either the default IRB.conf[:AUTO_INDENT], or the mode set by #prompt_mode=

To disable auto-indentation in irb:

IRB.conf[:AUTO_INDENT] = false

irb_context.auto_indent_mode = false

IRB.CurrentContext.auto_indent_mode = false

See IRB@Configuration for more information.

[ GitHub ]

# File 'lib/irb/context.rb', line 355


attr_accessor :auto_indent_mode

#back_trace_limit (rw)

The limit of backtrace lines displayed as top n and tail n.

The default value is 16.

Can also be set using the –back-trace-limit command line option.

[ GitHub ]

# File 'lib/irb/context.rb', line 446


attr_accessor :back_trace_limit

#command_aliases (rw)

User-defined ::IRB command aliases

[ GitHub ]

# File 'lib/irb/context.rb', line 449


attr_accessor :command_aliases

#echo? (rw)

Alias for #echo.

[ GitHub ]

# File 'lib/irb/context.rb', line 471


alias echo? echo

#echo_on_assignment? (rw)

Alias for #echo_on_assignment.

[ GitHub ]

# File 'lib/irb/context.rb', line 472


alias echo_on_assignment? echo_on_assignment

#eval_history (rw)

The command result history limit. This method is not available until #eval_history= was called with non-nil value (directly or via setting IRB.conf[:EVAL_HISTORY] in .irbrc).

[ GitHub ]

# File 'lib/irb/ext/eval_history.rb', line 31


attr_reader :eval_history

#eval_history=(no) (rw)

Sets command result history limit. Default value is set from IRB.conf[:EVAL_HISTORY].

no is an Integer or nil.

Returns no of history items if greater than 0.

If no is 0, the number of history items is unlimited.

If no is nil, execution result history isn’t used (default).

EvalHistory values are available via __ variable, see EvalHistory.

[ GitHub ]

# File 'lib/irb/ext/eval_history.rb', line 45


def eval_history=(val)
  self.class.remove_method(__method__)
  require_relative "ext/eval_history"
  __send__(__method__, val)
end

#extra_doc_dirs (rw)

Specify the installation locations of the ri file to be displayed in the document dialog.

[ GitHub ]

# File 'lib/irb/context.rb', line 375


attr_accessor :extra_doc_dirs

#file_input? ⇒ `Boolean` (readonly)

Whether #io uses a File for the input_method passed when creating the current context, see .new

[ GitHub ]

# File 'lib/irb/context.rb', line 534


def file_input?
  @io.class == FileInputMethod
end

#from_binding? ⇒ `Boolean` (readonly)

[ GitHub ]

# File 'lib/irb/context.rb', line 608


def from_binding?
  @irb.from_binding
end

#history_file (rw)

A copy of the default IRB.conf[:HISTORY_FILE]

[ GitHub ]

# File 'lib/irb/context.rb', line 228


def history_file
  IRB.conf[:HISTORY_FILE]
end

#history_file=(hist) (rw)

Set IRB.conf[:HISTORY_FILE] to the given hist.

[ GitHub ]

# File 'lib/irb/context.rb', line 233


def history_file=(hist)
  IRB.conf[:HISTORY_FILE] = hist
end

#ignore_eof? (rw)

Alias for #ignore_eof.

[ GitHub ]

# File 'lib/irb/context.rb', line 470


alias ignore_eof? ignore_eof

#ignore_sigint? (rw)

Alias for #ignore_sigint.

[ GitHub ]

# File 'lib/irb/context.rb', line 469


alias ignore_sigint? ignore_sigint

#inspect? ⇒ `Boolean` (readonly)

Whether #inspect_mode is set or not, see #inspect_mode= for more detail.

[ GitHub ]

# File 'lib/irb/context.rb', line 528


def inspect?
  @inspect_mode.nil? or @inspect_mode
end

#inspect_mode (rw)

A copy of the default IRB.conf[:INSPECT_MODE]

[ GitHub ]

# File 'lib/irb/context.rb', line 310


attr_reader :inspect_mode

#inspect_mode=(opt) (rw)

Specifies the inspect mode with opt:

true: display #inspect
false: display #to_s
nil: inspect mode in non-math mode, non-inspect mode in math mode

See Inspector for more information.

Can also be set using the –inspect and –noinspect command line options.

[ GitHub ]

# File 'lib/irb/context.rb', line 549


def inspect_mode=(opt)

  if i = Inspector::INSPECTORS[opt]
    @inspect_mode = opt
    @inspect_method = i
    i.init
  else
    case opt
    when nil
      if Inspector.keys_with_inspector(Inspector::INSPECTORS[true]).include?(@inspect_mode)
        self.inspect_mode = false
      elsif Inspector.keys_with_inspector(Inspector::INSPECTORS[false]).include?(@inspect_mode)
        self.inspect_mode = true
      else
        puts "Can't switch inspect mode."
        return
      end
    when /^\s*\{.*\}\s*$/
      begin
        inspector = eval "proc#{opt}"
      rescue Exception
        puts "Can't switch inspect mode(#{opt})."
        return
      end
      self.inspect_mode = inspector
    when Proc
      self.inspect_mode = IRB::Inspector(opt)
    when Inspector
      prefix = "usr%d"
      i = 1
      while Inspector::INSPECTORS[format(prefix, i)]; i += 1; end
      @inspect_mode = format(prefix, i)
      @inspect_method = opt
      Inspector.def_inspector(format(prefix, i), @inspect_method)
    else
      puts "Can't switch inspect mode(#{opt})."
      return
    end
  end
  print "Switch to#{unless @inspect_mode; ' non';end} inspect mode.\n" if verbose?
  @inspect_mode
end

#io (rw)

The current input method.

Can be either StdioInputMethod, ReadlineInputMethod, RelineInputMethod, FileInputMethod or other specified when the context is created. See .new for more # information on input_method.

[ GitHub ]

# File 'lib/irb/context.rb', line 262


attr_accessor :io

#irb (rw)

Current irb session.

[ GitHub ]

# File 'lib/irb/context.rb', line 265


attr_accessor :irb

#irb_name (rw)

Can be either name from IRB.conf[:IRB_NAME], or the number of the current job set by JobManager, such as irb#2

[ GitHub ]

# File 'lib/irb/context.rb', line 274


attr_accessor :irb_name

#irb_path (rw)

Can be one of the following:

the #irb_name surrounded by parenthesis
the input_method passed to .new
the file path of the current ::IRB context in a binding.irb session

[ GitHub ]

# File 'lib/irb/context.rb', line 280


attr_reader :irb_path

#irb_path=(path) (rw)

Sets @irb_path to the given path as well as @eval_path It’s the same as irb_path, but with the ::IRB name postfix This makes sure users can distinguish the methods defined in the ::IRB session from the methods defined in the current file’s context, especially with binding.irb

[ GitHub ]

# File 'lib/irb/context.rb', line 287


def irb_path=(path)
  @irb_path = path

  if File.exist?(path)
    @eval_path = "#{path}(#{IRB.conf[:IRB_NAME]})"
  else
    @eval_path = path
  end
end

#last_value (readonly)

The return value of the last statement evaluated.

[ GitHub ]

# File 'lib/irb/context.rb', line 500


attr_reader :last_value

#load_modules (rw)

A copy of the default IRB.conf[:LOAD_MODULES]

[ GitHub ]

# File 'lib/irb/context.rb', line 271


attr_accessor :load_modules

#newline_before_multiline_output? (rw)

Alias for #newline_before_multiline_output.

[ GitHub ]

# File 'lib/irb/context.rb', line 473


alias newline_before_multiline_output? newline_before_multiline_output

#prompt_c (rw)

::IRB prompt for continuated statement. (e.g. immediately after an if)

See Custom Prompts for more information.

[ GitHub ]

# File 'lib/irb/context.rb', line 325


attr_accessor :prompt_c

#prompt_i (rw)

Standard IRB prompt.

See Custom Prompts for more information.

[ GitHub ]

# File 'lib/irb/context.rb', line 317


attr_accessor :prompt_i

#prompt_mode (rw)

A copy of the default IRB.conf[:PROMPT_MODE]

[ GitHub ]

# File 'lib/irb/context.rb', line 313


attr_reader :prompt_mode

#prompt_mode=(mode) (rw)

Sets the mode of the prompt in this context.

See Custom Prompts for more information.

[ GitHub ]

# File 'lib/irb/context.rb', line 512


def prompt_mode=(mode)
  @prompt_mode = mode
  pconf = IRB.conf[:PROMPT][mode]
  @prompt_i = pconf[:PROMPT_I]
  @prompt_s = pconf[:PROMPT_S]
  @prompt_c = pconf[:PROMPT_C]
  @return_format = pconf[:RETURN]
  @return_format = "%s\n" if @return_format == nil
  if ai = pconf.include?(:AUTO_INDENT)
    @auto_indent_mode = ai
  else
    @auto_indent_mode = IRB.conf[:AUTO_INDENT]
  end
end

#prompt_n (rw)

TODO: Remove this when developing v2.0

[ GitHub ]

# File 'lib/irb/context.rb', line 328


def prompt_n
  warn "IRB::Context#prompt_n is deprecated and will be removed in the next major release."
  ""
end

#prompt_n=(_) (rw)

TODO: Remove this when developing v2.0

[ GitHub ]

# File 'lib/irb/context.rb', line 334


def prompt_n=(_)
  warn "IRB::Context#prompt_n= is deprecated and will be removed in the next major release."
  ""
end

#prompt_s (rw)

::IRB prompt for continuated strings.

See Custom Prompts for more information.

[ GitHub ]

# File 'lib/irb/context.rb', line 321


attr_accessor :prompt_s

#prompting? ⇒ `Boolean` (readonly)

Whether #verbose? is true, and input_method is either StdioInputMethod or RelineInputMethod or ReadlineInputMethod, see #io for more information.

[ GitHub ]

# File 'lib/irb/context.rb', line 495


def prompting?
  verbose? || @io.prompting?
end

#rc? (rw)

Alias for #rc.

[ GitHub ]

# File 'lib/irb/context.rb', line 468


alias rc? rc

#return_format (rw)

The format of the return statement, set by #prompt_mode= using the :RETURN of the mode passed to set the current #prompt_mode.

[ GitHub ]

# File 'lib/irb/context.rb', line 358


attr_accessor :return_format

#save_history (rw)

[ GitHub ]

# File 'lib/irb/context.rb', line 223


def save_history
  IRB.conf[:SAVE_HISTORY]
end

#save_history=(val) (rw)

[ GitHub ]

# File 'lib/irb/context.rb', line 219


def save_history=(val)
  IRB.conf[:SAVE_HISTORY] = val
end

#term_interactive? ⇒ `Boolean` (readonly, private)

[ GitHub ]

# File 'lib/irb/context.rb', line 158


private def term_interactive?
  return true if ENV['TEST_IRB_FORCE_INTERACTIVE']
  STDIN.tty? && ENV['TERM'] != 'dumb'
end

#thread (readonly)

The current thread in this context.

[ GitHub ]

# File 'lib/irb/context.rb', line 256


attr_reader :thread

#use_autocomplete? (readonly)

Alias for #use_autocomplete.

[ GitHub ]

# File 'lib/irb/context.rb', line 466


alias use_autocomplete? use_autocomplete

#use_loader=(opt) (rw)

Sets IRB.conf[:USE_LOADER]

See #use_loader for more information.

[ GitHub ]

# File 'lib/irb/ext/use-loader.rb', line 47


def use_loader=(val)
  self.class.remove_method(__method__)
  require_relative "ext/use-loader"
  __send__(__method__, val)
end

#use_loader? (rw)

Alias for #use_loader.

[ GitHub ]

# File 'lib/irb/ext/use-loader.rb', line 41


alias use_loader? use_loader

#use_multiline? (readonly)

Alias for #use_multiline.

[ GitHub ]

# File 'lib/irb/context.rb', line 454


alias use_multiline? use_multiline

#use_readline (readonly)

Alias for #use_singleline.

[ GitHub ]

# File 'lib/irb/context.rb', line 462


alias use_readline use_singleline

#use_readline? (readonly)

Alias for #use_singleline.

[ GitHub ]

# File 'lib/irb/context.rb', line 464


alias use_readline? use_singleline

#use_reline (readonly)

Alias for #use_multiline.

[ GitHub ]

# File 'lib/irb/context.rb', line 458


alias use_reline use_multiline

#use_reline? (readonly)

Alias for #use_multiline.

[ GitHub ]

# File 'lib/irb/context.rb', line 460


alias use_reline? use_multiline

#use_singleline? (readonly)

Alias for #use_singleline.

[ GitHub ]

# File 'lib/irb/context.rb', line 456


alias use_singleline? use_singleline

#use_tracer=(val) (writeonly)

[ GitHub ]

# File 'lib/irb/context.rb', line 163


def use_tracer=(val)
  require_relative "ext/tracer" if val
  IRB.conf[:USE_TRACER] = val
end

#verbose (rw)

Whether verbose messages are displayed or not.

A copy of the default IRB.conf[:VERBOSE]

[ GitHub ]

# File 'lib/irb/context.rb', line 439


attr_accessor :verbose

#verbose? ⇒ `Boolean` (rw)

Returns whether messages are displayed or not.

[ GitHub ]

# File 'lib/irb/context.rb', line 476


def verbose?
  if @verbose.nil?
    if @io.kind_of?(RelineInputMethod)
      false
    elsif defined?(ReadlineInputMethod) && @io.kind_of?(ReadlineInputMethod)
      false
    elsif !STDIN.tty? or @io.kind_of?(FileInputMethod)
      true
    else
      false
    end
  else
    @verbose
  end
end

#with_debugger (rw)

[ GitHub ]

# File 'lib/irb/context.rb', line 451


attr_accessor :with_debugger

#workspace_home (readonly)

The toplevel workspace, see #home_workspace

[ GitHub ]

# File 'lib/irb/context.rb', line 254


attr_reader :workspace_home

Instance Method Details

#inspect

[ GitHub ]

# File 'lib/irb/context.rb', line 684


alias __inspect__ inspect

#__to_s__

[ GitHub ]

# File 'lib/irb/context.rb', line 704


alias __to_s__ to_s

#_set_last_value(value)

Alias for #set_last_value.

[ GitHub ]

# File 'lib/irb/ext/eval_history.rb', line 14


alias _set_last_value set_last_value

#build_completor (private)

[ GitHub ]

# File 'lib/irb/context.rb', line 180


private def build_completor
  completor_type = IRB.conf[:COMPLETOR]

  # Gem repl_type_completor is added to bundled gems in Ruby 3.4.
  # Use :type as default completor only in Ruby 3.4 or later.
  verbose = !!completor_type
  completor_type ||= RUBY_VERSION >= '3.4' ? :type : :regexp

  case completor_type
  when :regexp
    return RegexpCompletor.new
  when :type
    completor = build_type_completor(verbose: verbose)
    return completor if completor
  else
    warn "Invalid value for IRB.conf[:COMPLETOR]: #{completor_type}"
  end
  # Fallback to RegexpCompletor
  RegexpCompletor.new
end

#build_type_completor(verbose:) (private)

[ GitHub ]

# File 'lib/irb/context.rb', line 201


private def build_type_completor(verbose:)
  if RUBY_ENGINE == 'truffleruby'
    # Avoid SyntaxError. truffleruby does not support endless method definition yet.
    warn 'TypeCompletor is not supported on TruffleRuby yet' if verbose
    return
  end

  begin
    require 'repl_type_completor'
  rescue LoadError => e
    warn "TypeCompletor requires `gem repl_type_completor`: #{e.message}" if verbose
    return
  end

  ReplTypeCompletor.preload_rbs
  TypeCompletor.new(self)
end

#change_workspace(*_main)

Changes the current workspace to given object or binding.

If the optional argument is omitted, the workspace will be #home_workspace which is inherited from TOPLEVEL_BINDING or the main object, IRB.conf[:MAIN_CONTEXT] when irb was initialized.

See WorkSpace.new for more information.

[ GitHub ]

# File 'lib/irb/ext/change-ws.rb', line 26


def change_workspace(*_main)
  if _main.empty?
    replace_workspace(home_workspace)
    return main
  end

  workspace = WorkSpace.new(_main[0])
  replace_workspace(workspace)
  workspace.load_helper_methods_to_main
end

#colorize_input(input, complete:)

[ GitHub ]

# File 'lib/irb/context.rb', line 661


def colorize_input(input, complete:)
  if IRB.conf[:USE_COLORIZE] && IRB::Color.colorable?
    lvars = local_variables || []
    if parse_command(input)
      name, sep, arg = input.split(/(\s+)/, 2)
      arg = IRB::Color.colorize_code(arg, complete: complete, local_variables: lvars)
      "#{IRB::Color.colorize(name, [:BOLD])}\e[m#{sep}#{arg}"
    else
      IRB::Color.colorize_code(input, complete: complete, local_variables: lvars)
    end
  else
    Reline::Unicode.escape_for_print(input)
  end
end

#echo (rw) Also known as: #echo?

Whether to echo the return value to output or not.

Uses IRB.conf[:ECHO] if available, or defaults to true.

puts "hello"
# hello
#=> nil
IRB.CurrentContext.echo = false
puts "omg"
# omg

[ GitHub ]

# File 'lib/irb/context.rb', line 386


attr_accessor :echo

#echo_on_assignment (rw) Also known as: #echo_on_assignment?

Whether to echo for assignment expressions.

If set to false, the value of assignment will not be shown.

If set to true, the value of assignment will be shown.

If set to :truncate, the value of assignment will be shown and truncated.

It defaults to :truncate.

a = "omg"
#=> omg

a = "omg" * 10
#=> omgomgomgomgomgomgomg...

IRB.CurrentContext.echo_on_assignment = false
a = "omg"

IRB.CurrentContext.echo_on_assignment = true
a = "omg" * 10
#=> omgomgomgomgomgomgomgomgomgomg

To set the behaviour of showing on assignment in irb:

IRB.conf[:ECHO_ON_ASSIGNMENT] = :truncate or true or false

irb_context.echo_on_assignment = :truncate or true or false

IRB.CurrentContext.echo_on_assignment = :truncate or true or false

[ GitHub ]

# File 'lib/irb/context.rb', line 421


attr_accessor :echo_on_assignment

#evaluate(statement, line_no)

This method is for internal use only.

[ GitHub ]

# File 'lib/irb/context.rb', line 592


def evaluate(statement, line_no) # :nodoc:
  @line_no = line_no

  case statement
  when Statement::EmptyInput
    return
  when Statement::Expression
    result = evaluate_expression(statement.code, line_no)
    set_last_value(result)
  when Statement::Command
    statement.command_class.execute(self, statement.arg)
  end

  nil
end

#evaluate_expression(code, line_no)

This method is for internal use only.

[ GitHub ]

# File 'lib/irb/context.rb', line 612


def evaluate_expression(code, line_no) # :nodoc:
  result = nil
  if IRB.conf[:MEASURE] && IRB.conf[:MEASURE_CALLBACKS].empty?
    IRB.set_measure_callback
  end

  if IRB.conf[:MEASURE] && !IRB.conf[:MEASURE_CALLBACKS].empty?
    last_proc = proc do
      result = workspace.evaluate(code, @eval_path, line_no)
    end
    IRB.conf[:MEASURE_CALLBACKS].inject(last_proc) do |chain, item|
      _name, callback, arg = item
      proc do
        callback.(self, code, line_no, arg) do
          chain.call
        end
      end
    end.call
  else
    result = workspace.evaluate(code, @eval_path, line_no)
  end
  result
end

#home_workspace

Inherited from TOPLEVEL_BINDING.

[ GitHub ]

# File 'lib/irb/ext/change-ws.rb', line 11


def home_workspace
  if defined? @home_workspace
    @home_workspace
  else
    @home_workspace = workspace
  end
end

#ignore_eof (rw) Also known as: #ignore_eof?

Whether ^D (control-d) will be ignored or not.

If set to false, ^D will quit irb.

[ GitHub ]

# File 'lib/irb/context.rb', line 372


attr_accessor :ignore_eof

#ignore_sigint (rw) Also known as: #ignore_sigint?

Whether ^C (control-c) will be ignored or not.

If set to false, ^C will quit irb.

If set to true,

during input: cancel input then return to top level.
during execute: abandon current execution.

[ GitHub ]

# File 'lib/irb/context.rb', line 368


attr_accessor :ignore_sigint

#inspect (readonly) Also known as: #to_s

This method is for internal use only.

[ GitHub ]

# File 'lib/irb/context.rb', line 685


def inspect # :nodoc:
  array = []
  for ivar in instance_variables.sort{|e1, e2| e1 <=> e2}
    ivar = ivar.to_s
    name = ivar.sub(/^@(.*)$/, '\1')
    val = instance_eval(ivar)
    case ivar
    when *NOPRINTING_IVARS
      array.push format("conf.%s=%s", name, "...")
    when *NO_INSPECTING_IVARS
      array.push format("conf.%s=%s", name, val.to_s)
    when *IDNAME_IVARS
      array.push format("conf.%s=:%s", name, val.id2name)
    else
      array.push format("conf.%s=%s", name, val.inspect)
    end
  end
  array.join("\n")
end

#inspect_last_value

This method is for internal use only.

[ GitHub ]

# File 'lib/irb/context.rb', line 676


def inspect_last_value # :nodoc:
  @inspect_method.inspect_value(@last_value)
end

#local_variables

This method is for internal use only.

[ GitHub ]

# File 'lib/irb/context.rb', line 707


def local_variables # :nodoc:
  workspace.binding.local_variables
end

#main

The top-level workspace, see WorkSpace#main

[ GitHub ]

# File 'lib/irb/context.rb', line 249


def main
  workspace.main
end

#newline_before_multiline_output (rw) Also known as: #newline_before_multiline_output?

Whether a newline is put before multiline output.

Uses IRB.conf[:NEWLINE_BEFORE_MULTILINE_OUTPUT] if available, or defaults to true.

"abc\ndef"
#=>
abc
def
IRB.CurrentContext.newline_before_multiline_output = false
"abc\ndef"
#=> abc
def

[ GitHub ]

# File 'lib/irb/context.rb', line 435


attr_accessor :newline_before_multiline_output

#parse_command(code)

[ GitHub ]

# File 'lib/irb/context.rb', line 636


def parse_command(code)
  command_name, arg = code.strip.split(/\s+/, 2)
  return unless code.lines.size == 1 && command_name

  arg ||= ''
  command = command_name.to_sym
  # Command aliases are always command. example: $, @
  if (alias_name = command_aliases[command])
    return [alias_name, arg]
  end

  # Assignment-like expression is not a command
  return if arg.start_with?(ASSIGN_OPERATORS_REGEXP) && !arg.start_with?(/==|=~/)

  # Local variable have precedence over command
  return if local_variables.include?(command)

  # Check visibility
  public_method = !!KERNEL_PUBLIC_METHOD.bind_call(main, command) rescue false
  private_method = !public_method && !!KERNEL_METHOD.bind_call(main, command) rescue false
  if Command.execute_as_command?(command, public_method: public_method, private_method: private_method)
    [command, arg]
  end
end

#pop_workspace

Removes the last element from the current #workspaces stack and returns it, or nil if the current workspace stack is empty.

Also, see #push_workspace.

[ GitHub ]

# File 'lib/irb/ext/workspaces.rb', line 32


def pop_workspace
  @workspace_stack.pop if @workspace_stack.size > 1
end

#push_workspace(*_main)

Creates a new workspace with the given object or binding, and appends it onto the current #workspaces stack.

See #change_workspace and WorkSpace.new for more information.

[ GitHub ]

# File 'lib/irb/ext/workspaces.rb', line 14


def push_workspace(*_main)
  if _main.empty?
    if @workspace_stack.size > 1
      # swap the top two workspaces
      previous_workspace, current_workspace = @workspace_stack.pop(2)
      @workspace_stack.push current_workspace, previous_workspace
    end
  else
    new_workspace = WorkSpace.new(workspace.binding, _main[0])
    @workspace_stack.push new_workspace
    new_workspace.load_helper_methods_to_main
  end
end

#rc (rw) Also known as: #rc?

A copy of the default IRB.conf[:RC]

[ GitHub ]

# File 'lib/irb/context.rb', line 269


attr_accessor :rc

#replace_workspace(workspace)

Replace the current workspace with the given #workspace.

[ GitHub ]

# File 'lib/irb/context.rb', line 243


def replace_workspace(workspace)
  @workspace_stack.pop
  @workspace_stack.push(workspace)
end

#safe_method_call_on_main(method_name)

[ GitHub ]

# File 'lib/irb/context.rb', line 711


def safe_method_call_on_main(method_name)
  main_object = main
  Object === main_object ? main_object.__send__(method_name) : Object.instance_method(method_name).bind_call(main_object)
end

#set_last_value(value) Also known as: #_set_last_value

Sets the return value from the last statement evaluated in this context to #last_value.

See additional method definition at file lib/irb/context.rb line 504.

[ GitHub ]

# File 'lib/irb/ext/eval_history.rb', line 16


def set_last_value(value)
  @last_value = value
  workspace.local_variable_set :_, value
end

#to_s

Alias for #inspect.

[ GitHub ]

# File 'lib/irb/context.rb', line 705


alias to_s inspect

#use_autocomplete (readonly) Also known as: #use_autocomplete?

Whether colorization is enabled or not.

A copy of the default IRB.conf[:USE_AUTOCOMPLETE]

[ GitHub ]

# File 'lib/irb/context.rb', line 308


attr_reader :use_autocomplete

#use_loader (rw) Also known as: #use_loader?

Returns whether #irb‘s own file reader method is used by load+/+require or not.

This mode is globally affected (irb-wide).

[ GitHub ]

# File 'lib/irb/ext/use-loader.rb', line 37


def use_loader
  IRB.conf[:USE_LOADER]
end

#use_multiline (readonly) Also known as: #use_multiline?, #use_reline, #use_reline?

Whether multiline editor mode is enabled or not.

A copy of the default IRB.conf[:USE_MULTILINE]

[ GitHub ]

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


attr_reader :use_multiline

#use_singleline (readonly) Also known as: #use_singleline?, #use_readline, #use_readline?

Whether singleline editor mode is enabled or not.

A copy of the default IRB.conf[:USE_SINGLELINE]

[ GitHub ]

# File 'lib/irb/context.rb', line 304


attr_reader :use_singleline

#workspace

Workspace in the current context.

[ GitHub ]

# File 'lib/irb/context.rb', line 238


def workspace
  @workspace_stack.last
end

Class: IRB::Context

Overview

Constant Summary

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(irb, workspace = nil, input_method = nil) ⇒ Context

Instance Attribute Details

#ap_name (rw)

#auto_indent_mode (rw)

#back_trace_limit (rw)

#command_aliases (rw)

#echo? (rw)

#echo_on_assignment? (rw)

#eval_history (rw)

#eval_history=(no) (rw)

#extra_doc_dirs (rw)

#file_input? ⇒ Boolean (readonly)

#from_binding? ⇒ Boolean (readonly)

#history_file (rw)

#history_file=(hist) (rw)

#ignore_eof? (rw)

#ignore_sigint? (rw)

#inspect? ⇒ Boolean (readonly)

#inspect_mode (rw)

#inspect_mode=(opt) (rw)

#io (rw)

#irb (rw)

#irb_name (rw)

#irb_path (rw)

#irb_path=(path) (rw)

#last_value (readonly)

#load_modules (rw)

#newline_before_multiline_output? (rw)

#prompt_c (rw)

#prompt_i (rw)

#prompt_mode (rw)

#prompt_mode=(mode) (rw)

#prompt_n (rw)

#prompt_n=(_) (rw)

#prompt_s (rw)

#prompting? ⇒ Boolean (readonly)

#rc? (rw)

#return_format (rw)

#save_history (rw)

#save_history=(val) (rw)

#term_interactive? ⇒ Boolean (readonly, private)

#thread (readonly)

#use_autocomplete? (readonly)

#use_loader=(opt) (rw)

#use_loader? (rw)

#use_multiline? (readonly)

#use_readline (readonly)

#use_readline? (readonly)

#use_reline (readonly)

#use_reline? (readonly)

#use_singleline? (readonly)

#use_tracer=(val) (writeonly)

#verbose (rw)

#verbose? ⇒ Boolean (rw)

#with_debugger (rw)

#workspace_home (readonly)

Instance Method Details

#__inspect__

#__to_s__

#_set_last_value(value)

#build_completor (private)

#build_type_completor(verbose:) (private)

#change_workspace(*_main)

#colorize_input(input, complete:)

#echo (rw) Also known as: #echo?

#echo_on_assignment (rw) Also known as: #echo_on_assignment?

#evaluate(statement, line_no)

#evaluate_expression(code, line_no)

#home_workspace

#ignore_eof (rw) Also known as: #ignore_eof?

#ignore_sigint (rw) Also known as: #ignore_sigint?

#inspect (readonly) Also known as: #to_s

#inspect_last_value

.new(irb, workspace = nil, input_method = nil) ⇒ `Context`

#file_input? ⇒ `Boolean` (readonly)

#from_binding? ⇒ `Boolean` (readonly)

#inspect? ⇒ `Boolean` (readonly)

#prompting? ⇒ `Boolean` (readonly)

#term_interactive? ⇒ `Boolean` (readonly, private)

#verbose? ⇒ `Boolean` (rw)

#inspect