Class: Dentaku::AST::Xor

Inherits:
Function show all
Defined in:
lib/dentaku/ast/functions/xor.rb

Constant Summary

Constants inherited from Function

Function::DIG

Instance Attribute Summary

Attributes inherited from Function

#args

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Function

#accept, #dependencies, get, #initialize, numeric, register, register_class, registry

Methods inherited from Node

arity, #dependencies, #name, peek, precedence, #type

Constructor Details

This class inherits a constructor from Dentaku::AST::Function

Class Method Details

.max_param_count ⇒ Object 



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# File 'lib/dentaku/ast/functions/xor.rb', line 11

def self.max_param_count
  Float::INFINITY
end

.min_param_count ⇒ Object 



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# File 'lib/dentaku/ast/functions/xor.rb', line 7

def self.min_param_count
  1
end

Instance Method Details

#value(context = {}) ⇒ Object 



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# File 'lib/dentaku/ast/functions/xor.rb', line 15

def value(context = {})
  if @args.empty?
    raise Dentaku::ArgumentError.for(
      :too_few_arguments,
      function_name: 'XOR()', at_least: 1, given: 0
    ), 'XOR() requires at least one argument'
  end

  true_arg_count = 0
  @args.each do |arg|
    case arg.value(context)
    when TrueClass
      true_arg_count += 1
      break if true_arg_count > 1
    when FalseClass, nil
      next
    else
      raise Dentaku::ArgumentError.for(
        :incompatible_type,
        function_name: 'XOR()', expect: :logical, actual: arg.class
      ), 'XOR() requires arguments to be logical expressions'
    end
  end
  true_arg_count == 1
end