|0.1.16||Oct 23, 2023|
|0.1.15||Oct 25, 2022|
|0.1.13||Dec 5, 2020|
|0.1.12||Nov 21, 2020|
|0.1.3||Mar 3, 2019|
#1077 in Procedural macros
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Used in 714 crates (via const-random)
This crate provides compile time random number generation. This allows you to insert random constants into your code that will be auto-generated at compile time.
A new value will be generated every time the file is rebuilt. This obviously makes the resulting binary or lib non-deterministic. (See below)
use const_random::const_random ; const MY_RANDOM_NUMBER: u32 = const_random!(u32);
This works exactly as through you have called:
OsRng.gen::<u32>() at compile time.
So for details of the random number generation, see the
rand crates documentation.
The following types are supported: u8, i8, u16, i16, u32, i32, u64, i64, u128, i128, usize, isize and [u8; N].
Sometimes it is an advantage for build systems to be deterministic. To support this
const-random reads the environmental
CONST_RANDOM_SEED. If this variable is set, it will be used as the seed for the random number generation.
Setting the same seed on a build of the same code should result in identical output.