slabbable-impl-selector 0.1.0

Slabbable data structure impl selector
Documentation 
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#![warn(
    clippy::unwrap_used,
    missing_docs,
    rust_2018_idioms,
    unused_lifetimes,
    unused_qualifications
)]
#![allow(clippy::single_match, rustdoc::bare_urls)]
#![cfg_attr(all(not(feature = "std"), not(test)), no_std)]
#![doc = include_str!("../README.md")]

#[cfg(all(
    slabbable_impl = "stablevec",
    any(slabbable_impl = "slab", slabbable_impl = "hash")
))]
compile_error!("slabbable-impl_selector: must not choose stablevec with anything else");

#[cfg(all(
    slabbable_impl = "slab",
    any(slabbable_impl = "stablevec", slabbable_impl = "hash")
))]
compile_error!("slabbable-impl_selector: must not choose slab with anything else");

#[cfg(all(
    slabbable_impl = "hash",
    any(slabbable_impl = "slab", slabbable_impl = "stablevec")
))]
compile_error!("slabbable-impl_selector: must not choose hash with anything else");

cfg_if::cfg_if! {

    if #[cfg(slabbable_impl = "stablevec")] {
        /// Selected impl is StableVec
        pub type SelectedSlab<Item> = slabbable_stablevec::StableVecSlab<Item>;
    } else if #[cfg(slabbable_impl = "slab")] {
        /// Selected impl is Slab
        pub type SelectedSlab<Item> = slabbable_slab::SlabSlab<Item>;
    } else if  #[cfg(slabbable_impl = "hash")] {
        /// Selected impl is Hash
        pub type SelectedSlab<Item> = slabbable_hash::HashSlab<Item>;
    } else {
        /// Selected default impl is Hash
        pub type SelectedSlab<Item> = slabbable_hash::HashSlab<Item>;
    }
}