Class: Opal::Nodes::MassAssignNode
- Defined in:
- opal/lib/opal/nodes/masgn.rb
Constant Summary
Constants included from Helpers
Helpers::BASIC_IDENTIFIER_RULES, Helpers::ES3_RESERVED_WORD_EXCLUSIVE, Helpers::ES51_RESERVED_WORD, Helpers::IMMUTABLE_PROPS
Instance Attribute Summary
Attributes inherited from Base
Instance Method Summary collapse
Methods inherited from Base
#add_gvar, #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, #valid_name?, #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/masgn.rb', line 10 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 |