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Versions: 14
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Contents
require 'opal/nodes/base'
module Opal
module Nodes
class MassAssignNode < Base
handle :masgn
children :lhs, :rhs
def compile
tmp = scope.new_temp
len = 0 # how many rhs items are we sure we have
if rhs.type == :array
len = rhs.size - 1
push "#{tmp} = ", expr(rhs)
elsif rhs.type == :to_ary
push "#{tmp} = Opal.to_ary(", expr(rhs[1]), ")"
elsif rhs.type == :splat
push "(#{tmp} = ", expr(rhs[1]), ")['$to_a'] && !#{tmp}['$to_a'].$$stub ? (#{tmp} = #{tmp}['$to_a']())"
push " : (#{tmp}).$$is_array ? #{tmp} : (#{tmp} = [#{tmp}])"
else
raise "unsupported mlhs type"
end
lhs.children.each_with_index do |child, idx|
push ', '
if child.type == :splat
if part = child[1]
part = part.dup
part << s(:js_tmp, "$slice.call(#{tmp}, #{idx})")
push expr(part)
end
else
if idx >= len
assign = s(:js_tmp, "(#{tmp}[#{idx}] == null ? nil : #{tmp}[#{idx}])")
else
assign = s(:js_tmp, "#{tmp}[#{idx}]")
end
part = child.dup
if child.type == :lasgn or child.type == :iasgn or child.type == :lvar or child.type == :gasgn
part << assign
elsif child.type == :call
part[2] = "#{part[2]}=".to_sym
part.last << assign
elsif child.type == :attrasgn
part.last << assign
else
raise "Bad lhs for masgn"
end
push expr(part)
end
end
scope.queue_temp tmp
end
end
end
end
Version data entries
14 entries across 14 versions & 2 rubygems