Packages

  • package root

    This is the documentation for Parsley.

    This is the documentation for Parsley.

    Package structure

    The parsley package contains the Parsley class, as well as the Result, Success, and Failure types. In addition to these, it also contains the following packages and "modules" (a module is defined as being an object which mocks a package):

    • parsley.Parsley contains the bulk of the core "function-style" combinators.
    • parsley.combinator contains many helpful combinators that simplify some common parser patterns.
    • parsley.character contains the combinators needed to read characters and strings, as well as combinators to match specific sub-sets of characters.
    • parsley.debug contains debugging combinators, helpful for identifying faults in parsers.
    • parsley.expr contains the following sub modules:
      • parsley.expr.chain contains combinators used in expression parsing
      • parsley.expr.precedence is a builder for expression parsers built on a precedence table.
      • parsley.expr.infix contains combinators used in expression parsing, but with more permissive types than their equivalents in chain.
      • parsley.expr.mixed contains combinators that can be used for expression parsing, but where different fixities may be mixed on the same level: this is rare in practice.
    • parsley.syntax contains several implicits to add syntactic sugar to the combinators. These are sub-categorised into the following sub modules:
      • parsley.syntax.character contains implicits to allow you to use character and string literals as parsers.
      • parsley.syntax.lift enables postfix application of the lift combinator onto a function (or value).
      • parsley.syntax.zipped enables boths a reversed form of lift where the function appears on the right and is applied on a tuple (useful when type inference has failed) as well as a .zipped method for building tuples out of several combinators.
      • parsley.syntax.extension contains syntactic sugar combinators exposed as implicit classes.
    • parsley.errors contains modules to deal with error messages, their refinement and generation.
    • parsley.lift contains functions which lift functions that work on regular types to those which now combine the results of parsers returning those same types. these are ubiquitous.
    • parsley.ap contains functions which allow for the application of a parser returning a function to several parsers returning each of the argument types.
    • parsley.state contains combinators that interact with the context-sensitive functionality in the form of state.
    • parsley.token contains the Lexer class that provides a host of helpful lexing combinators when provided with the description of a language.
    • parsley.position contains parsers for extracting position information.
    • parsley.generic contains some basic implementations of the Parser Bridge pattern (see Design Patterns for Parser Combinators in Scala, or the parsley wiki): these can be used before more specialised generic bridge traits can be constructed.
    Definition Classes
    root
  • package parsley
    Definition Classes
    root
  • package syntax
    Definition Classes
    parsley
  • character
  • extension
  • lift
  • zipped

object lift

This module provides the "lift syntax", which enables a lift combinator on functions of arities up to 22, applying the function across the results of several parsers.

Source
lift.scala
Example:

  1. scala> import parsley.character.char
scala> import parsley.syntax.lift.{Lift2, Lift3}
scala> case class Add(x: Int, y: Int)
scala> val p = Add.lift(char('a').as(4), char('b').as(5))
scala> p.parse("ab")
val res0 = Success(Add(4, 5))
scala> val f = (x: Int, y: Int, z: Int) => x * y + z
scala> val q = f.lift(char('a').as(3), char('b').as(2), char('c').as(5))
scala> q.parse("abc")
val res1 = Success(11)
scala> q.parse("ab")
val res2 = Failure(..)
Since

4.5.0

Note

a limitation of this syntax is that it requires the function's type to be fully known. For a version of this syntax that behaves better with type inference, see zipped.

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Type Members

  1. implicit final class Lift0[R] extends AnyVal

    This class enables the lift syntax on any value, which functions as pure as a postfix method.

  2. implicit final class Lift1[T1, R] extends AnyVal

    This class enables the lift syntax on functions of arity one: a flipped map.

  3. implicit final class Lift10[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, R] extends AnyVal

    This class enables the lift syntax on functions of arity ten.

  4. implicit final class Lift11[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, R] extends AnyVal

    This class enables the lift syntax on functions of arity eleven.

  5. implicit final class Lift12[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, R] extends AnyVal

    This class enables the lift syntax on functions of arity twelve.

  6. implicit final class Lift13[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, R] extends AnyVal

    This class enables the lift syntax on functions of arity thirteen.

  7. implicit final class Lift14[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, R] extends AnyVal

    This class enables the lift syntax on functions of arity fourteen.

  8. implicit final class Lift15[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, R] extends AnyVal

    This class enables the lift syntax on functions of arity fifteen.

  9. implicit final class Lift16[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, R] extends AnyVal

    This class enables the lift syntax on functions of arity sixteen.

  10. implicit final class Lift17[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, R] extends AnyVal

    This class enables the lift syntax on functions of arity seventeen.

  11. implicit final class Lift18[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, R] extends AnyVal

    This class enables the lift syntax on functions of arity eighteen.

  12. implicit final class Lift19[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, R] extends AnyVal

    This class enables the lift syntax on functions of arity nineteen.

  13. implicit final class Lift2[T1, T2, R] extends AnyVal

    This class enables the lift syntax on functions of arity two.

  14. implicit final class Lift20[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, R] extends AnyVal

    This class enables the lift syntax on functions of arity twenty.

  15. implicit final class Lift21[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, R] extends AnyVal

    This class enables the lift syntax on functions of arity twenty-one.

  16. implicit final class Lift22[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, R] extends AnyVal

    This class enables the lift syntax on functions of arity twenty-two.

  17. implicit final class Lift3[T1, T2, T3, R] extends AnyVal

    This class enables the lift syntax on functions of arity three.

  18. implicit final class Lift4[T1, T2, T3, T4, R] extends AnyVal

    This class enables the lift syntax on functions of arity four.

  19. implicit final class Lift5[T1, T2, T3, T4, T5, R] extends AnyVal

    This class enables the lift syntax on functions of arity five.

  20. implicit final class Lift6[T1, T2, T3, T4, T5, T6, R] extends AnyVal

    This class enables the lift syntax on functions of arity six.

  21. implicit final class Lift7[T1, T2, T3, T4, T5, T6, T7, R] extends AnyVal

    This class enables the lift syntax on functions of arity seven.

  22. implicit final class Lift8[T1, T2, T3, T4, T5, T6, T7, T8, R] extends AnyVal

    This class enables the lift syntax on functions of arity eight.

  23. implicit final class Lift9[T1, T2, T3, T4, T5, T6, T7, T8, T9, R] extends AnyVal

    This class enables the lift syntax on functions of arity nine.

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