radix: refactor (1/N: add generic variant for Radix)

Cargo.toml

@@ -12,15 +12,12 @@ rust-version = "1.81.0"
 [dependencies]
 cfg-if = "1.0"
 fastrand = { version = "2.2", default-features = false }
+# FIXME: use std isqrt after rust 1.84.0 release
 integer-sqrt = "0.1"
 num-bigint = { version = "0.4", default-features = false }
 rayon = { version = "1.10", optional = true }
 regex = { version = "1.11", default-features = false }
-
-[dependencies.snafu]
-version = "0.8.5"
-default-features = false
-features = ["rust_1_81"]
+thiserror = { version = "2.0", default-features = false }
 
 [features]
 default = ["std"]

src/algorithm/prime.rs

@@ -6,13 +6,13 @@
 
 use {
     crate::num::power::modpow, fastrand::Rng, integer_sqrt::IntegerSquareRoot as _,
-    num_bigint::BigUint, snafu::Snafu,
+    num_bigint::BigUint, thiserror::Error,
 };
 
 /// If number is less than 2, we can't say that number is either prime or composite.
 #[non_exhaustive]
-#[derive(Debug, Snafu, PartialEq, Eq, Clone, Copy)]
-#[snafu(display("This number is neither prime nor composite"))]
+#[derive(Debug, Error, PartialEq, Eq, Clone, Copy)]
+#[error("This number is neither prime nor composite")]
 pub struct PrimeStatusError;
 
 #[non_exhaustive]