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  • package root
    Definition Classes
    root
  • package parsley
    Definition Classes
    root
  • package expr

    This package contains various functionality relating to the parsing of expressions..

    This package contains various functionality relating to the parsing of expressions..

    This includes the "chain" combinators, which tackle the left-recursion problem and allow for the parsing and combining of operators with values. It also includes functionality for constructing larger precedence tables, which may even vary the type of each layer in the table, allowing for strongly-typed expression parsing.

    Definition Classes
    parsley
  • Atoms
  • Fixity
  • GOps
  • InfixL
  • InfixN
  • InfixR
  • Ops
  • Postfix
  • Prec
  • Prefix
  • SOps
  • chain
  • infix
  • mixed
  • precedence

object GOps

This helper object builds values of Ops[A, B], for fully heterogeneous precedence parsing.

Source
SmartOps.scala
Since

2.2.0

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  1. final def !=(arg0: Any): Boolean
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  2. final def ##: Int
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  3. final def ==(arg0: Any): Boolean
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  4. def apply[A, B](fixity: Fixity)(ops: Parsley[Op[A, B]]*)(implicit wrap: (A) => B): Ops[A, B]

    This function builds an Ops object representing many operators found at the same precedence level, with a given fixity.

    This function builds an Ops object representing many operators found at the same precedence level, with a given fixity.

    The operators found on the level constructed by this function are heterogeneous: the type of the level below may vary from the types of the values produced at this level. To make this work, a wrap function must be provided that can transform the values from the layer below into the types generated by this layer.

    Using path-dependent typing, the given fixity describes the shape of the operators expected. For more information see the Parsley wiki.

    A

    the base type consumed by the operators.

    B

    the type produced/consumed by the operators.

    fixity

    the fixity of the operators described.

    ops

    The operators themselves, provided variadically.

    wrap

    the function which should be used to wrap up a value of type A when required (this will be at right of a left-assoc chain, left of a right-assoc chain, or the root of a prefix/postfix chain).

    Since

    2.2.0

    Note

    currently a bug in scaladoc incorrect displays this functions type, it should be: fixity.Op[A, B], NOT Op[A, B].

    See also

    Fixity

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