class GraphQL::Query::LiteralInput

def self.coerce(type, value, variables)
  if value.is_a?(Language::Nodes::VariableIdentifier)
    variables[value.name]
  elsif value.nil?
    nil
  else
    LiteralKindCoercers::STRATEGIES.fetch(type.kind).coerce(value, type, variables)
  end
end

def self.from_arguments(ast_arguments, argument_defns, variables)
  values_hash = {}
  argument_defns.each do |arg_name, arg_defn|
    ast_arg = ast_arguments.find { |ast_arg| ast_arg.name == arg_name }
    arg_default_value = arg_defn.type.coerce_input(arg_defn.default_value)
    if ast_arg.nil? && arg_default_value.nil?
      # If it wasn't in the document,
      # and there's no provided default,
      # then don't pass it to the resolve function
      next
    else
      arg_value = nil
      if ast_arg
        arg_value = coerce(arg_defn.type, ast_arg.value, variables)
      end
      if arg_value.nil?
        arg_value = arg_default_value
      end
      values_hash[arg_name] = arg_value
    end
  end
  GraphQL::Query::Arguments.new(values_hash)
end