Class: Java::OrgJrubyAst::WhileNode

Inherits:
Object
  • Object
show all
Defined in:
lib/duby/old/compiler_old.rb

Instance Method Summary collapse

Instance Method Details

#compile(builder) ⇒ Object 



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# File 'lib/duby/old/compiler_old.rb', line 749

def compile(builder)
  begin_lbl = builder.label
  end_lbl = builder.label
  cond_lbl = builder.label
  
  case body_node.type(builder)
  when Jint
    builder.iconst_0
  else
    builder.aconst_null
  end
  
  if evaluate_at_start
    builder.goto cond_lbl
  end
  
  begin_lbl.set!
  builder.pop
  body_node.compile(builder)
  
  cond_lbl.set!
  compile_condition(builder, begin_lbl)
  end_lbl.set!
end

#compile_condition(builder, begin_lbl) ⇒ Object 



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# File 'lib/duby/old/compiler_old.rb', line 774

def compile_condition(builder, begin_lbl)
  condition = condition_node
  condition = condition.next_node while NewlineNode === condition
  
  case condition
  when CallNode
    args = condition.args_node
    receiver_type = condition.receiver_node.type(builder)
    
    if receiver_type.primitive?
      case condition.name
      when "<"
        raise CompileError.new(position, "Primitive < must have exactly one argument") if !args || args.size != 1

        condition.receiver_node.compile(builder)
        args.get(0).compile(builder)

        case receiver_type
        when Jint
          builder.if_icmplt(begin_lbl)
        else
          raise CompileError.new(position, "Primitive < is only supported for int")
        end
      when ">"
        raise CompileError.new(position, "Primitive > must have exactly one argument") if !args || args.size != 1

        condition.receiver_node.compile(builder)
        args.get(0).compile(builder)

        case receiver_type
        when Jint
          builder.if_icmpgt(begin_lbl)
        else
          raise CompileError.new(position, "Primitive < is only supported for int")
        end
      else
        raise CompileError.new(position, "Conditional not supported: #{condition.inspect}")
      end
    else
      raise CompileError.new(position, "Conditional on non-primitives not supported: #{condition.inspect}")
    end
  else
    raise CompileError.new(position, "Non-call conditional not supported: #{condition.inspect}")
  end
end