Class: GlooLang::Objs::Eval

Inherits:
Core::Obj show all
Defined in:
lib/gloo_lang/objs/ror/eval.rb

Constant Summary collapse

KEYWORD = 
'eval'.freeze
KEYWORD_SHORT = 
'ruby'.freeze
CMD = 
'command'.freeze
DEFAULT_CMD = 
'1+2'.freeze
RESULT = 
'result'.freeze

Constants inherited from Core::Baseo

Core::Baseo::NOT_IMPLEMENTED_ERR

Instance Attribute Summary

Attributes inherited from Core::Obj

#children, #parent, #value

Attributes inherited from Core::Baseo

#name

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Core::Obj

#add_child, can_create?, #can_receive_message?, #child_count, #contains_child?, #delete_children, #dispatch, #display_value, #find_add_child, #find_child, help, inherited, #initialize, #msg_reload, #msg_unload, #multiline_value?, #pn, #remove_child, #root?, #send_message, #set_parent, #set_value, #type_display, #value_display, #value_is_array?, #value_is_blank?, #value_string?

Methods inherited from Core::Baseo

#initialize, #type_display

Constructor Details

This class inherits a constructor from GlooLang::Core::Obj

Class Method Details

.messages ⇒ Object

Get a list of message names that this object receives.



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# File 'lib/gloo_lang/objs/ror/eval.rb', line 83

def self.messages
  return super + [ 'run' ]
end

.short_typename ⇒ Object

The short name of the object type.



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# File 'lib/gloo_lang/objs/ror/eval.rb', line 27

def self.short_typename
  return KEYWORD_SHORT
end

.typename ⇒ Object

The name of the object type.



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# File 'lib/gloo_lang/objs/ror/eval.rb', line 20

def self.typename
  return KEYWORD
end

Instance Method Details

#add_children_on_create? ⇒ Boolean

Does this object have children to add when an object is created in interactive mode? This does not apply during obj load, etc.

Returns:



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# File 'lib/gloo_lang/objs/ror/eval.rb', line 61

def add_children_on_create?
  return true
end

#add_default_children ⇒ Object

Add children to this object. This is used by containers to add children needed for default configurations.



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# File 'lib/gloo_lang/objs/ror/eval.rb', line 70

def add_default_children
  fac = @engine.factory
  fac.create_string CMD, DEFAULT_CMD, self
  fac.create_string RESULT, nil, self
end

#cmd_value ⇒ Object

Get the URI from the child object. Returns nil if there is none.



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# File 'lib/gloo_lang/objs/ror/eval.rb', line 35

def cmd_value
  cmd = find_child CMD
  return nil unless cmd

  return cmd.value
end

#msg_run ⇒ Object

Run the command and evaluate the expression.



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# File 'lib/gloo_lang/objs/ror/eval.rb', line 90

def msg_run
  cmd = cmd_value
  return unless cmd

  begin
    # rubocop:disable Security/Eval
    result = eval cmd
    # rubocop:enable Security/Eval
    set_result result
    @engine.heap.it.set_to result
  rescue => e
    @engine.err e.message
  end
end

#set_result(data) ⇒ Object

Set the result of the system call.



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# File 'lib/gloo_lang/objs/ror/eval.rb', line 45

def set_result( data )
  r = find_child RESULT
  return nil unless r

  r.set_value data
end