Class: Environment

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby_parser_extras.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(dyn = false) ⇒ Environment

Returns a new instance of Environment.



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# File 'lib/ruby_parser_extras.rb', line 930

def initialize dyn = false
  @dyn = []
  @env = []
  @use = []
  self.reset
end

Instance Attribute Details

#dyn ⇒ Object (readonly)

Returns the value of attribute dyn.



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# File 'lib/ruby_parser_extras.rb', line 895

def dyn
  @dyn
end

#env ⇒ Object (readonly)

Returns the value of attribute env.



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# File 'lib/ruby_parser_extras.rb', line 895

def env
  @env
end

Instance Method Details

#[](k) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 897

def [] k
  self.all[k]
end

#[]=(k, v) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 901

def []= k, v
  raise "no" if v == true
  self.current[k] = v
end

#all ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 906

def all
  idx = @dyn.index(false) || 0
  @env[0..idx].reverse.inject { |env, scope| env.merge scope }
end

#current ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 911

def current
  @env.first
end

#dynamic ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 915

def dynamic
  idx = @dyn.index false
  @env[0...idx].reverse.inject { |env, scope| env.merge scope } || {}
end

#dynamic? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ruby_parser_extras.rb', line 920

def dynamic?
  @dyn[0] != false
end

#extend(dyn = false) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 924

def extend dyn = false
  @dyn.unshift dyn
  @env.unshift({})
  @use.unshift({})
end

#reset ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 937

def reset
  @dyn.clear
  @env.clear
  @use.clear
  self.extend
end

#unextend ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 944

def unextend
  @dyn.shift
  @env.shift
  @use.shift
  raise "You went too far unextending env" if @env.empty?
end

#use(id) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 951

def use id
  @env.each_with_index do |env, i|
    if env[id] then
      @use[i][id] = true
    end
  end
end

#used?(id) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ruby_parser_extras.rb', line 959

def used? id
  idx = @dyn.index false # REFACTOR
  u = @use[0...idx].reverse.inject { |env, scope| env.merge scope } || {}
  u[id]
end