#embedded #no_std #build #const #static

no-std build build_const

library for creating importable constants from build.rs or a script

4 releases

0.2.1 Apr 13, 2018
0.2.0 May 31, 2017
0.1.1 May 30, 2017
0.1.0 May 29, 2017

#1 in Embedded development

Download history 12590/week @ 2018-09-19 14335/week @ 2018-09-26 15037/week @ 2018-10-03 15230/week @ 2018-10-10 16840/week @ 2018-10-17 16395/week @ 2018-10-24 18961/week @ 2018-10-31 19508/week @ 2018-11-07 21049/week @ 2018-11-14 21344/week @ 2018-11-21 18244/week @ 2018-11-28 19066/week @ 2018-12-05 17094/week @ 2018-12-12

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MIT license

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build_const: crate for creating constants in your build script

Rust library for creating importable constants from build.rs or a script

See the crate documentation and the crate on crates.io


lib.rs:

build_const: crate for creating constants in your build script

The build_const crate exists to help create rust constant files at compile time or in a generating script. It is ultra simple and lightweight, making constant creation a simple matter.

Recommended use: when developing make your constants in build.rs. Once your constants are fairly stable create a script instead and have your constants file be generated in either a single file or an external crate that you can bring in as a dependency.

Example

Include build_const = VERSION in your Cargo.toml file. For no_std support (macros only) use default-features = false.

See ConstWriter for how to use in a build.rs or script. To then import a "constants.rs" file created in build.rs use:

#[macro_use]
extern crate build_const;

build_const!("constants");
println!("VALUE: {}", VALUE);
println!("VALUE: {}", ARRAY);

For writing constants in a script, the macro src_file! is also provided.

// will write files to `/src/constants.rs`
let mut consts = ConstWriter::from_path(&Path::from(src_file!("constants.rs"))).unwrap();
// ... use consts

No runtime deps