Class: Contextuality::Context

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

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Context

Returns a new instance of Context.



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# File 'lib/contextuality/context.rb', line 3

def initialize
  @scopes = []
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object 



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# File 'lib/contextuality/context.rb', line 38

def method_missing method, *args, &block
  self[method]
end

Instance Method Details

#[](name) ⇒ Object 



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# File 'lib/contextuality/context.rb', line 23

def [] name
  name = name.to_s
  scope = @scopes.detect { |scope| scope.key? name }
  scope ? scope[name] : Contextuality.defaults[name.to_sym]
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/contextuality/context.rb', line 34

def empty?
  !@scopes.any? { |scope| !scope.empty? }
end

#key?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/contextuality/context.rb', line 29

def key? name
  name = name.to_s
  @scopes.any? { |scope| scope.key? name }
end

#pop ⇒ Object 



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# File 'lib/contextuality/context.rb', line 18

def pop
  Contextuality.log "#{'=' * @scopes.size} Exiting scope"
  @scopes.shift
end

#push(variables) ⇒ Object 



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# File 'lib/contextuality/context.rb', line 13

def push variables
  @scopes.unshift Hash[variables.map { |(name, variable)| [name.to_s, variable] }]
  Contextuality.log "#{'=' * @scopes.size} Entering scope: #{scope_inspect @scopes.first}"
end

#scope_inspect(scope) ⇒ Object 



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# File 'lib/contextuality/context.rb', line 7

def scope_inspect scope
  scope.map do |name, value|
    "#{name}: #{value.inspect}"
  end.to_a.join(', ')
end