Module: Fop::Compiler::Validations

Defined in:
lib/fop/compiler.rb

Class Method Summary collapse

Class Method Details

.validate_args(exp_node) ⇒ Object 



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# File 'lib/fop/compiler.rb', line 83

def self.validate_args(exp_node)
  op_token = exp_node.operator_token || return
  op = Instructions::OPERATIONS.fetch(op_token.val)
  num = exp_node.args&.size || 0
  arity = op.arity
  max_arity = op.max_arity || arity
  if num < arity or num > max_arity
    Parser::Error.new(:argument, op_token, "#{op_token.val} expects #{arity}..#{max_arity} arguments; #{num} given")
  end
end