scala.util.parsing.combinator.Parsers
class UnitParser

[source: `scala/util/parsing/combinator/Parsers.scala`]

`abstract` `class` UnitParser
  `extends` (Reader) => ParseResult[Unit]

  The root class of special parsers returning the trivial result `Unit` These compose differently from normal parsers in that the `Unit` result in a sequential or function composition is dropped.

Direct Known Subclasses:
  Parsers.UnitOnceParser

Method Summary
`def` | ^^ [U](v : U) : Parser[U] A parser combinator for function application `p ^^ v' succeeds if `p' succeeds; it returns `v'.
`abstract def` | apply (in : Reader) : ParseResult[Unit] An unspecified method that defines the behaviour of this parser.
`def` | | [Q](q : => Q)(`implicit` view$5 : (Q) => UnitParser) : UnitParser A parser combinator for alternative composition `p | q' succeeds if `p' succeeds or `q' succeeds Note that `q' is only tried if `p's failure is non-fatal (i.e., back-tracking is allowed).
`def` | ~ [A](q : => A)(`implicit` view$3 : (A) => UnitParser) : UnitParser A parser combinator for sequential composition with a unit-parser `p ~ q' succeeds if `p' succeeds and `q' succeeds on the input left over by `p'.
`def` | ~ [U](q : => Parser[U]) : Parser[U] A parser combinator for sequential composition `p ~ q' succeeds if `p' succeeds and `q' succeeds on the input left over by `p'.
`def` | ~! [Q](q : => Q)(`implicit` view$4 : (Q) => UnitParser) : UnitParser A parser combinator for non-back-tracking sequential composition with a unit-parser `p ~! q' succeeds if `p' succeeds and `q' succeeds on the input left over by `p'. In case of failure, no back-tracking is performed (in an earlier parser produced by the | combinator).
`def` | ~! [U](q : => Parser[U]) : Parser[U] A parser combinator for non-back-tracking sequential composition `p ~! q' succeeds if `p' succeeds and `q' succeeds on the input left over by `p'. In case of failure, no back-tracking is performed (in an earlier parser produced by the | combinator).

Methods inherited from Function1
toString, compose, andThen

Methods inherited from AnyRef
getClass, hashCode, equals, clone, notify, notifyAll, wait, wait, wait, finalize, ==, !=, eq, ne, synchronized

Methods inherited from Any
==, !=, isInstanceOf, asInstanceOf

Method Details

`abstract` `def` apply(in : Reader) : ParseResult[Unit]

  An unspecified method that defines the behaviour of this parser.

Overrides
  Function1.apply

`` `def` ~[U](q : => Parser[U]) : Parser[U]

  A parser combinator for sequential composition

  `p ~ q' succeeds if `p' succeeds and `q' succeeds on the input left over by `p'.

Parameters
  `q -` a parser that will be executed after `p' (this parser) succeeds
Returns
  a `Parser' that -- on success -- returns the result of `q'. The resulting parser fails if either `p' or `q' fails.

`` `def` ~[A](q : => A)(`implicit` view$3 : (A) => UnitParser) : UnitParser

  A parser combinator for sequential composition with a unit-parser

  `p ~ q' succeeds if `p' succeeds and `q' succeeds on the input left over by `p'.

Parameters
  `q -` a parser (convertible to a UnitParser) that will be executed after `p' (this parser) succeeds
Returns
  a `UnitParser' that fails if either `p' or `q' fails.

`` `def` ~![U](q : => Parser[U]) : Parser[U]

  A parser combinator for non-back-tracking sequential composition

  `p ~! q' succeeds if `p' succeeds and `q' succeeds on the input left over by `p'. In case of failure, no back-tracking is performed (in an earlier parser produced by the | combinator).

Parameters
  `q -` a parser that will be executed after `p' (this parser) succeeds
Returns
  a `Parser' that -- on success -- returns the result of `q`. The resulting parser fails if either `p' or `q' fails, this failure is fatal.

`` `def` ~![Q](q : => Q)(`implicit` view$4 : (Q) => UnitParser) : UnitParser

  A parser combinator for non-back-tracking sequential composition with a unit-parser

  `p ~! q' succeeds if `p' succeeds and `q' succeeds on the input left over by `p'. In case of failure, no back-tracking is performed (in an earlier parser produced by the | combinator).

Parameters
  `q -` a parser that will be executed after `p' (this parser) succeeds
Returns
  a `UnitParser' that fails if either `p' or `q' fails, this failure is fatal.

`` `def` |[Q](q : => Q)(`implicit` view$5 : (Q) => UnitParser) : UnitParser

  A parser combinator for alternative composition

  `p | q' succeeds if `p' succeeds or `q' succeeds Note that `q' is only tried if `p's failure is non-fatal (i.e., back-tracking is allowed).

Parameters
  `q -` a parser that will be executed if `p' (this parser) fails (and allows back-tracking)
Returns
  a `Parser' succeeds if (and only if)
  - `p' succeeds, or
  - if `p' fails allowing back-tracking and `q' succeeds.

`` `def` ^^[U](v : U) : Parser[U]

  A parser combinator for function application

  `p ^^ v' succeeds if `p' succeeds; it returns `v'.

Parameters
  `v -` a value that's used as the result of the returned Parser (if it was successful).
Returns
  a parser that has the same behaviour as the current parser, but whose result is consists of `v'.