用Scala解析Python的If语句

import scala.util.parsing.combinator._

// 定义语法解析器
object PythonIfParser extends JavaTokenParsers {
  // 定义If语句的语法规则
  def ifStatement: Parser[Any] = "if" ~ condition ~ ":" ~ rep(statement)

  // 定义条件表达式的语法规则
  def condition: Parser[Any] = expr ~ comparisonOperator ~ expr

  // 定义语句的语法规则
  def statement: Parser[Any] = "print" ~ expr

  // 定义表达式的语法规则
  def expr: Parser[Any] = wholeNumber | stringLiteral

  // 定义比较运算符的语法规则
  def comparisonOperator: Parser[Any] = "<" | ">" | "==" | "!="

  // 解析输入的Python If语句
  def parseIf(input: String): ParseResult[Any] = parseAll(ifStatement, input)
}

// 测试解析器
object Main extends App {
  val input = "if x < 10: print('x is less than 10')"
  val result = PythonIfParser.parseIf(input)
  println(result)
}