Class: Gloo::Verbs::Exists

Inherits:
Core::Verb show all
Defined in:
lib/gloo/verbs/exists.rb

Constant Summary collapse

KEYWORD = 
'exists?'.freeze
KEYWORD_SHORT = 
'exist'.freeze
VERB_TYPE = 
'verb'.freeze
OBJ_TYPE = 
'object'.freeze
ANY_TYPE = 
'any'.freeze
WRONG_NUM_ARGS_ERR = 
'Wrong number of arguments! 1 or 2 expected.'.freeze

Constants inherited from Core::Baseo

Core::Baseo::NOT_IMPLEMENTED_ERR

Instance Attribute Summary

Attributes inherited from Core::Verb

#params, #tokens

Attributes inherited from Core::Baseo

#name

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Core::Verb

#display_value, help, inherited, #initialize, #type_display

Methods inherited from Core::Baseo

#initialize, #type_display

Constructor Details

This class inherits a constructor from Gloo::Core::Verb

Class Method Details

.keyword ⇒ Object

Get the Verb’s keyword.



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# File 'lib/gloo/verbs/exists.rb', line 39

def self.keyword
  return KEYWORD
end

.keyword_shortcut ⇒ Object

Get the Verb’s keyword shortcut.



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# File 'lib/gloo/verbs/exists.rb', line 46

def self.keyword_shortcut
  return KEYWORD_SHORT
end

Instance Method Details

#run ⇒ Object

Run the verb.



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# File 'lib/gloo/verbs/exists.rb', line 21

def run
  if @tokens.token_count == 3
    type = @tokens.second.strip.downcase
    keyword = @tokens.last
  elsif @tokens.token_count == 2
    type = ANY_TYPE
    keyword = @tokens.second
  else
    @engine.err WRONG_NUM_ARGS_ERR
    return
  end
  
  @engine.heap.it.set_to lookup_keyword(keyword, type)
end