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Contents
# frozen_string_literal: true
require 'opal/nodes/base'
module Opal
module Nodes
# A node responsible for extracting a rest argument
# (or splat argument)
#
# def m(*rest)
#
class RestargNode < Base
handle :restarg
children :name
def compile
return unless name
add_temp name
if @sexp.meta[:post]
# post restarg case (in mlhs or in deoptimized arguments)
# splat is always the last item in scope.working_arguments
line "#{name} = #{scope.working_arguments};"
else
# inline restarg case
offset = @sexp.meta[:offset]
# restarg value should be taken directly from parameters
line "var $args_len = arguments.length, $rest_len = $args_len - #{offset};"
line "if ($rest_len < 0) { $rest_len = 0; }"
line "#{name} = new Array($rest_len);"
line "for (var $arg_idx = #{offset}; $arg_idx < $args_len; $arg_idx++) {"
line " #{name}[$arg_idx - #{offset}] = arguments[$arg_idx];"
line "}"
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems