Class: Kapusta::Env

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

Defined Under Namespace

Classes: MethodBinding

Instance Method Summary collapse

Constructor Details

#initialize(parent = nil) ⇒ Env

Returns a new instance of Env.



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# File 'lib/kapusta/env.rb', line 7

def initialize(parent = nil)
  @parent = parent
  @vars = {}
end

Instance Method Details

#child ⇒ Object 



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# File 'lib/kapusta/env.rb', line 59

def child
  Env.new(self)
end

#define(name, value) ⇒ Object 



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# File 'lib/kapusta/env.rb', line 12

def define(name, value)
  @vars[binding_key(name)] = value
end

#defined?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kapusta/env.rb', line 36

def defined?(name)
  @vars.key?(binding_key(name)) || @parent&.defined?(name)
end

#local_ruby_name_defined?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kapusta/env.rb', line 44

def local_ruby_name_defined?(name)
  @vars.any? { |_source_name, value| binding_ruby_name(value) == name }
end

#lookup(name) ⇒ Object 



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# File 'lib/kapusta/env.rb', line 16

def lookup(name)
  key = binding_key(name)
  if @vars.key?(key)
    @vars[key]
  elsif @parent
    @parent.lookup(name)
  else
    raise NameError, "undefined: #{name}"
  end
end

#lookup_if_defined(name) ⇒ Object 



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# File 'lib/kapusta/env.rb', line 27

def lookup_if_defined(name)
  key = binding_key(name)
  if @vars.key?(key)
    @vars[key]
  else
    @parent&.lookup_if_defined(name)
  end
end

#ruby_name_defined?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kapusta/env.rb', line 40

def ruby_name_defined?(name)
  @vars.any? { |_source_name, value| binding_ruby_name(value) == name } || @parent&.ruby_name_defined?(name)
end

#set_existing!(name, value) ⇒ Object 



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# File 'lib/kapusta/env.rb', line 48

def set_existing!(name, value)
  key = binding_key(name)
  if @vars.key?(key)
    @vars[key] = value
  elsif @parent
    @parent.set_existing!(name, value)
  else
    raise NameError, "undefined: #{name}"
  end
end