Marker traits for primitive types

This crate provides marker traits for primitive types:

• Prim;
  • PrimTextual;
  • PrimNum;
    • PrimInt;
      • PrimSignedInt;
      • PrimUnsignedInt;
  • PrimFloat.

Example

Cargo.toml

## ...

[dependencies]
just_prim = { version = "0.1.0" }

## ...

[features]

## https://doc.rust-lang.org/beta/unstable-book/language-features/marker-trait-attr.html
marker_trait_attr = ["just_prim/marker_trait_attr"]

src/main.rs

// Uncomment if you want to conditionally use the feature. Remove otherwise.
// #![cfg_attr(feature = "marker_trait_attr", feature(marker_trait_attr))]

use just_prim::Prim;

trait MyExtensionTraitForPrimTys: Prim {
    // ...
}

fn main() {}

Building, running, and testing

• cargo build <other options> --features marker_trait_attr if you want the feature and cargo build <other options> otherwise;
• cargo run<other options> --features marker_trait_attr if you want the feature and cargo build <other options> otherwise;
• cargo test <other options> --features marker_trait_attr if you want the feature and cargo test <other options> otherwise.

Features

With marker_trait_attr Nightly feature, each of the provided traits also has #[marker] attribute which allows more optimal implementation of traits via two or more "overlapping" generic impl blocks. Without #[marker] attribute, the "overlapping" impl blocks would be conflicting.

Similar crates by the author:

• epui - Equisized (primitive) unsigned ints for primitive ints: u8 for u8, u16 for i16, etc
• epsi - Equisized (primitive) signed ints for primitive ints
• primitive_promotion - Primitive promotions for primitive numeric types: u16 for u8, i32 for i16, f64 for f32, etc
• is_signed_trait - Trait for IS_SIGNED associated constant
• max_len_base_10_as_usize - Trait offering constant maximum lengths of primitive integers as usize
• min_max_traits - Traits for MIN and MAX associated constants
• as well as others that can be found on crates.io

License