相关疑难解决方法(0)

我正在创建一个DSL,并使用Scala的解析器组合库来解析DSL.DSL遵循简单的类似Ruby的语法.源文件可以包含一系列看起来像这样的块:

create_model do
  at 0,0,0
end

线路结尾在DSL中很重要,因为它们被有效地用作语句终止符.

我写了一个Scala解析器,看起来像这样:

class ML3D extends JavaTokenParsers {
  override val whiteSpace = """[ \t]+""".r

  def model: Parser[Any] = commandList
  def commandList: Parser[Any] = rep(commandBlock)
  def commandBlock: Parser[Any] = command~"do"~eol~statementList~"end"
  def eol: Parser[Any] = """(\r?\n)+""".r
  def command: Parser[Any] = commandName~opt(commandLabel)
  def commandName: Parser[Any] = ident
  def commandLabel: Parser[Any] = stringLiteral
  def statementList: Parser[Any] = rep(statement)
  def statement: Parser[Any] = functionName~argumentList~eol
  def functionName: Parser[Any] = ident
  def argumentList: Parser[Any] = repsep(argument, ",")
  def argument: Parser[Any] = stringLiteral …