const it!

This crate provides some utilities for use in const evaluation contexts, in particular const slicing and error handling.

The slice! and try_slice! macros slice (using any usize or range expression):

const STR: &str = slice!("const slice", ..5); // "const"

The split_slice_at! and try_split_slice_at! macros split a slice in two:

const STR: (&str, &str) = split_slice_at!("const slice", 5); // ("const", " slice")

The ok!, expect_ok!, unwrap_ok!, unwrap_ok_or_return!, expect_some!, unwrap_some! and unwrap_some_or_return! macros work with Results and Options.

See the documentation at https://docs.rs/const-it