Class: Opal::Nodes::ArrayNode

Inherits:
Base show all
Defined in:
opal/lib/opal/nodes/array.rb

Constant Summary

Constants included from Helpers

Helpers::RESERVED

Instance Attribute Summary

Attributes inherited from Base

#compiler, #type

Instance Method Summary collapse

Methods inherited from Base

#add_ivar, #add_local, #add_temp, children, #children, #compile_to_fragments, #error, #expr, #expr?, #expr_or_nil, #fragment, handle, handlers, #helper, #in_while?, #initialize, #process, #push, #recv, #recv?, #s, #scope, #stmt, #stmt?, #unshift, #while_loop, #with_temp, #wrap

Methods included from Helpers

#current_indent, #empty_line, #indent, #js_falsy, #js_truthy, #js_truthy_optimize, #line, #lvar_to_js, #mid_to_jsid, #property, #reserved?, #variable

Constructor Details

This class inherits a constructor from Opal::Nodes::Base

Instance Method Details

#compile ⇒ Object 



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# File 'opal/lib/opal/nodes/array.rb', line 8

def compile
  return push('[]') if children.empty?

  code, work = [], []

  children.each do |child|
    splat = child.type == :splat
    part  = expr(child)

    if splat
      if work.empty?
        if code.empty?
          code << fragment("[].concat(") << part << fragment(")")
        else
          code << fragment(".concat(") << part << fragment(")")
        end
      else
        if code.empty?
          code << fragment("[") << work << fragment("]")
        else
          code << fragment(".concat([") << work << fragment("])")
        end

        code << fragment(".concat(") << part << fragment(")")
      end
      work = []
    else
      work << fragment(", ") unless work.empty?
      work << part
    end
  end

  unless work.empty?
    join = [fragment("["), work, fragment("]")]

    if code.empty?
      code = join
    else
      code.push([fragment(".concat("), join, fragment(")")])
    end
  end

  push code
end