Class: Opal::Nodes::OpAsgn1Node

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

Overview

lhs[args] ||= rhs s(:op_asgn1, lhs, args, :||, rhs)

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/call_special.rb', line 68

def compile
  case op.to_s
  when '||' then compile_or
  when '&&' then compile_and
  else compile_operator
  end
end

#compile_operator ⇒ Object 



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# File 'opal/lib/opal/nodes/call_special.rb', line 76

def compile_operator
  with_temp do |a| # args
    with_temp do |r| # recv
      cur = s(:call, s(:js_tmp, r), :[], s(:arglist, s(:js_tmp, a)))
      rhs = s(:call, cur, :+, s(:arglist, self.rhs))
      call = s(:call, s(:js_tmp, r), :[]=, s(:arglist, s(:js_tmp, a), rhs))

      push "(#{a} = ", expr(first_arg), ", #{r} = ", expr(lhs)
      push ", ", expr(call), ")"
    end
  end
end

#compile_or ⇒ Object 



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# File 'opal/lib/opal/nodes/call_special.rb', line 89

def compile_or
  with_temp do |a| # args
    with_temp do |r| # recv
      aref = s(:call, s(:js_tmp, r), :[], s(:arglist, s(:js_tmp, a)))
      aset = s(:call, s(:js_tmp, r), :[]=, s(:arglist, s(:js_tmp, a), rhs))
      orop = s(:or, aref, aset)

      push "(#{a} = ", expr(first_arg), ", #{r} = ", expr(lhs)
      push ", ", expr(orop), ")"
    end
  end
end

#first_arg ⇒ Object 



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# File 'opal/lib/opal/nodes/call_special.rb', line 64

def first_arg
  args[1]
end