pathmap 0.2.2

A key-value store with prefix compression, structural sharing, and powerful algebraic operations
Documentation 
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//! Debug utilities for catamorphisms and other morphisms

use crate::utils::ByteMask;
use crate::alloc::Allocator;
use crate::PathMap;
use crate::zipper::*;
use crate::morphisms::{into_cata_cached_body, DoCache};

/// Debug extension trait for catamorphisms
///
/// This trait provides debug-only catamorphism methods that may expose additional
/// information useful for debugging and development.
pub trait CatamorphismDebug<V> {
    /// A version of [`into_cata_jumping_cached`](crate::morphisms::Catamorphism::into_cata_jumping_cached) where
    /// the full path is available to the closure; **For debugging purposes only**
    ///
    /// Using data from the full path for your algorithm **will** lead to incorrect behavior.
    /// You must either adapt your algorithm not to require full path data or use the one of
    /// the `_side_effect` methods.
    fn into_cata_jumping_cached_fallible_debug<W, E, AlgF>(self, alg_f: AlgF) -> Result<W, E>
        where
            W: Clone,
            AlgF: Fn(&ByteMask, &mut [W], Option<&V>, &[u8], &[u8]) -> Result<W, E>;
}

impl<'a, Z, V: 'a> CatamorphismDebug<V> for Z where Z: Zipper + ZipperReadOnlyConditionalValues<'a, V> + ZipperConcrete + ZipperAbsolutePath + ZipperPathBuffer {
    fn into_cata_jumping_cached_fallible_debug<W, E, AlgF>(self, alg_f: AlgF) -> Result<W, E>
    where
        W: Clone,
        AlgF: Fn(&ByteMask, &mut [W], Option<&V>, &[u8], &[u8]) -> Result<W, E>
    {
        into_cata_cached_body::<Self, V, W, E, _, DoCache, true, true>(self, alg_f)
    }
}

impl<V: 'static + Clone + Send + Sync + Unpin, A: Allocator + 'static> CatamorphismDebug<V> for PathMap<V, A> {
    fn into_cata_jumping_cached_fallible_debug<W, E, AlgF>(self, alg_f: AlgF) -> Result<W, E>
        where
            W: Clone,
            AlgF: Fn(&ByteMask, &mut [W], Option<&V>, &[u8], &[u8]) -> Result<W, E>
    {
        let rz = self.into_read_zipper(&[]);
        rz.into_cata_jumping_cached_fallible_debug(alg_f)
    }
}