Method: Sass::Script::Tree::Funcall#_perform

Defined in:
lib/sass/script/tree/funcall.rb

#_perform(environment) ⇒ Sass::Script::Value (protected)

Evaluates the function call.

Parameters:

  • environment (Sass::Environment) —

    The environment in which to evaluate the SassScript

Returns:

Raises:


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# File 'lib/sass/script/tree/funcall.rb', line 127

def _perform(environment)
  args = @args.each_with_index.
    map {|a, i| perform_arg(a, environment, signature && signature.args[i])}
  keywords = Sass::Util.map_hash(@keywords) do |k, v|
    [k, perform_arg(v, environment, k.tr('-', '_'))]
  end
  splat = Sass::Tree::Visitors::Perform.perform_splat(
    @splat, keywords, @kwarg_splat, environment)

  fn = @callable || environment.function(@name)

  if fn && fn.origin == :stylesheet
    environment.stack.with_function(filename, line, name) do
      return without_original(perform_sass_fn(fn, args, splat, environment))
    end
  end

  args = construct_ruby_args(ruby_name, args, splat, environment)

  if Sass::Script::Functions.callable?(ruby_name) && (!fn || fn.origin == :builtin)
    local_environment = Sass::Environment.new(environment.global_env, environment.options)
    local_environment.caller = Sass::ReadOnlyEnvironment.new(environment, environment.options)
    result = local_environment.stack.with_function(filename, line, name) do
      opts(Sass::Script::Functions::EvaluationContext.new(
        local_environment).send(ruby_name, *args))
    end
    without_original(result)
  else
    opts(to_literal(args))
  end
rescue ArgumentError => e
  reformat_argument_error(e)
end