Class: Calyx::Production::Expression

Inherits:
Object
  • Object
show all
Defined in:
lib/calyx/production/expression.rb

Instance Method Summary collapse

Constructor Details

#initialize(production, methods, registry) ⇒ Expression

Returns a new instance of Expression.



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# File 'lib/calyx/production/expression.rb', line 4

def initialize(production, methods, registry)
  @production = production
  @methods = methods.map { |m| m.to_sym }
  @registry = registry
end

Instance Method Details

#evaluate ⇒ Object 



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# File 'lib/calyx/production/expression.rb', line 10

def evaluate
  terminal = @production.evaluate.flatten.reject { |o| o.is_a?(Symbol) }.join(''.freeze)
  expression = @methods.reduce(terminal) do |value, method|
    @registry.transform(method, value)
  end

  [:expression, expression]
end