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

    This package contains various functionality that involve Scala's implicits mechanism.

    This package contains various functionality that involve Scala's implicits mechanism.

    This includes conversions from scala literals into parsers, as well as enabling new syntax on regular Scala values (such as Parsley's lift or zipped syntax). Automatic conversion to Parsley[Unit] is also supported within this package.

    Definition Classes
    parsley
  • object extension

    These implicit classes can be used to extend the core combinator set of Parsley.

    These implicit classes can be used to extend the core combinator set of Parsley.

    This may mean that importing them enables combinators that can be used on non-Parsley types, or might enable some syntactic sugar that is not part of the core combinator "style".#

    Definition Classes
    syntax
    Since

    4.5.0

  • HaskellStyleMap
  • LazyChooseParsley
  • OperatorSugar
c

parsley.syntax.extension

LazyChooseParsley

implicit final class LazyChooseParsley[P, Q, +A] extends AnyRef

This class exposes an if combinator on pairs of parsers.

This extension class operators on pairs of values that are convertible to parsers. It enables the use of the ?: combinator, which is an alias for ifP.

P

the type of left base value that this class is used on (the conversion to Parsley) is summoned automatically.

Q

the type of right base value that this class is used on (the conversion to Parsley) is summoned automatically.

Source
extension.scala
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Instance Constructors

  1. new LazyChooseParsley(pq: ⇒ (P, Q))(implicit conP: (P) ⇒ Parsley[A], conQ: (Q) ⇒ Parsley[A])

    This constructor should not be called manually, it is designed to be used via Scala's implicit resolution.

    This constructor should not be called manually, it is designed to be used via Scala's implicit resolution.

    pq

    The values (convertible to parsers) that serve the branches of the if.

    conP

    a conversion that allows values convertible to parsers to be used.

    conQ

    a conversion that allows values convertible to parsers to be used.

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
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  2. final def ##(): Int
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  3. final def ==(arg0: Any): Boolean
    Definition Classes
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  4. def ?:(b: Parsley[Boolean]): Parsley[A]

    This combinator will conditionally parse one of the parsers in this pair depending on the result of a third parser b.

    This combinator will conditionally parse one of the parsers in this pair depending on the result of a third parser b.

    Equivalent to ifP, but in operator form: ifP(b, p, q) is the same as b ?: (p, q).

    Note

    Scala applies methods ending in : right-associatively, and the pair is on the right-hand side of the operator.

    See also

    ifP

  5. final def asInstanceOf[T0]: T0
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  6. def clone(): AnyRef
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  7. final def eq(arg0: AnyRef): Boolean
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  9. def finalize(): Unit
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  11. def hashCode(): Int
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  12. final def isInstanceOf[T0]: Boolean
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  13. final def ne(arg0: AnyRef): Boolean
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  14. final def notify(): Unit
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  15. final def notifyAll(): Unit
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  16. final def synchronized[T0](arg0: ⇒ T0): T0
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  18. final def wait(): Unit
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  19. final def wait(arg0: Long, arg1: Int): Unit
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