regex - 使用 RegexParsers 解析空格

Question

解析空格有什么问题？

scala> object BlankParser extends RegexParsers {
         def blank: Parser[Any] = " "
         def foo: Parser[Any] = "foo"
       }
defined module BlankParser

scala> BlankParser.parseAll(BlankParser.foo, "foo")
res15: BlankParser.ParseResult[Any] = [1.4] parsed: foo

scala> BlankParser.parseAll(BlankParser.blank, " ")
res16: BlankParser.ParseResult[Any] =
[1.2] failure: ` ' expected but ` ' found


 ^

scala>

Answer 1

scala 的词法分析器会丢弃空格。尝试 覆盖 val skipWhitespace = false避免这种情况。

问题已经解决了，看来... Scala parser combinators for language embedded in html or text (like php)