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  • package root
    Definition Classes
    root
  • package parsley
    Definition Classes
    root
  • object registers

    This module contains all the functionality and operations for using and manipulating registers.

    This module contains all the functionality and operations for using and manipulating registers.

    These often have a role in performing context-sensitive parsing tasks, where a Turing-powerful system is required. While flatMap is capable of such parsing, it is much less efficient than the use of registers, though slightly more flexible. In particular, the persist combinator enabled by RegisterMethods can serve as a drop-in replacement for flatMap in many scenarios.

    Definition Classes
    parsley
    Since

    2.2.0

  • Reg
  • RegisterMaker
  • RegisterMethods

object Reg

This object allows for the construction of a register via its make function.

Source
registers.scala
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  12. def make[A]: Reg[A]

    This function creates a new (global) register of a given type.

    This function creates a new (global) register of a given type.

    The register created by this function is not allocated to any specific parser until it has been used by a parser. It should not be used with multiple different parsers.

    A

    the type to be contained in this register during runtime

    returns

    a new register which can contain the given type.

    Since

    2.2.0

    Note

    registers created in this manner must be initialised in the top-level parser and not inside a flatMap, as this may make them corrupt other registers. They should be used with caution. It is recommended to use makeReg and fillReg where possible.

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