Use namespaced-features to safely bump to MSRV 1.60

Earlier versions won't see the incompatible updates at all!

Author: cuviper

.github/workflows/ci.yaml

@@ -9,11 +9,7 @@ jobs:
     strategy:
       matrix:
         rust: [
-          1.31.0, # 2018!
-          1.34.0, # has_try_from
-          1.36.0, # alloc, rand
-          1.40.0, # arbitrary
-          1.46.0, # quickcheck
+          1.60.0, # MSRV
           stable,
           beta,
           nightly

.github/workflows/master.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: [1.31.0, stable]
+        rust: [1.60.0, stable]
     steps:
       - uses: actions/checkout@v4
       - uses: actions/cache@v4

.github/workflows/pr.yaml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: [1.31.0, stable]
+        rust: [1.60.0, stable]
     steps:
       - uses: actions/checkout@v4
       - uses: actions/cache@v4

Cargo.toml

@@ -13,10 +13,15 @@ readme = "README.md"
 build = "build.rs"
 exclude = ["/ci/*", "/.github/*"]
 edition = "2018"
+rust-version = "1.60"
 
 [features]
 default = ["std"]
 std = ["num-integer/std", "num-traits/std"]
+arbitrary = ["dep:arbitrary"]
+quickcheck = ["dep:quickcheck"]
+rand = ["dep:rand"]
+serde = ["dep:serde"]
 
 [package.metadata.docs.rs]
 features = ["std", "serde", "rand", "quickcheck", "arbitrary"]

README.md

@@ -2,7 +2,7 @@
 
 [![crate](https://img.shields.io/crates/v/num-bigint.svg)](https://crates.io/crates/num-bigint)
 [![documentation](https://docs.rs/num-bigint/badge.svg)](https://docs.rs/num-bigint)
-[![minimum rustc 1.31](https://img.shields.io/badge/rustc-1.31+-red.svg)](https://rust-lang.github.io/rfcs/2495-min-rust-version.html)
+[![minimum rustc 1.60](https://img.shields.io/badge/rustc-1.60+-red.svg)](https://rust-lang.github.io/rfcs/2495-min-rust-version.html)
 [![build status](https://github.com/rust-num/num-bigint/workflows/master/badge.svg)](https://github.com/rust-num/num-bigint/actions)
 
 Big integer types for Rust, `BigInt` and `BigUint`.
@@ -42,7 +42,7 @@ Release notes are available in [RELEASES.md](RELEASES.md).
 
 ## Compatibility
 
-The `num-bigint` crate is tested for rustc 1.31 and greater.
+The `num-bigint` crate is tested for rustc 1.60 and greater.
 
 ## Alternatives
 
@@ -52,10 +52,10 @@ table offers a brief comparison to a few alternatives.
 
 | Crate             | License        | Min rustc | Implementation | Features |
 | :---------------  | :------------- | :-------- | :------------- | :------- |
-| **`num-bigint`**  | MIT/Apache-2.0 | 1.31      | pure rust | dynamic width, number theoretical functions |
+| **`num-bigint`**  | MIT/Apache-2.0 | 1.60      | pure rust | dynamic width, number theoretical functions |
 | [`awint`]         | MIT/Apache-2.0 | 1.66      | pure rust | fixed width, heap or stack, concatenation macros |
-| [`bnum`]          | MIT/Apache-2.0 | 1.61      | pure rust | fixed width, parity with Rust primitives including floats |
-| [`crypto-bigint`] | MIT/Apache-2.0 | 1.57      | pure rust | fixed width, stack only |
+| [`bnum`]          | MIT/Apache-2.0 | 1.65      | pure rust | fixed width, parity with Rust primitives including floats |
+| [`crypto-bigint`] | MIT/Apache-2.0 | 1.73      | pure rust | fixed width, stack only |
 | [`ibig`]          | MIT/Apache-2.0 | 1.49      | pure rust | dynamic width, number theoretical functions |
 | [`rug`]           | LGPL-3.0+      | 1.65      | bundles [GMP] via [`gmp-mpfr-sys`] | all the features of GMP, MPFR, and MPC |
 

ci/rustup.sh

@@ -5,6 +5,6 @@
 set -ex
 
 ci=$(dirname $0)
-for version in 1.31.0 1.34.0 1.36.0 1.40.0 1.46.0 stable beta nightly; do
+for version in 1.60.0 stable beta nightly; do
     rustup run "$version" "$ci/test_full.sh"
 done

ci/test_full.sh

@@ -3,7 +3,7 @@
 set -e
 
 CRATE=num-bigint
-MSRV=1.31
+MSRV=1.60
 
 get_rust_version() {
   local array=($(rustc --version));
@@ -27,18 +27,15 @@ if ! check_version $MSRV ; then
   exit 1
 fi
 
-STD_FEATURES=(serde)
-check_version 1.36 && STD_FEATURES+=(rand)
-check_version 1.36 && NO_STD_FEATURES=(serde rand)
-check_version 1.40 && STD_FEATURES+=(arbitrary)
-check_version 1.46 && STD_FEATURES+=(quickcheck)
+STD_FEATURES=(arbitrary quickcheck rand serde)
+NO_STD_FEATURES=(serde rand)
 echo "Testing supported features: ${STD_FEATURES[*]}"
 if [ -n "${NO_STD_FEATURES[*]}" ]; then
   echo " no_std supported features: ${NO_STD_FEATURES[*]}"
 fi
 
-# arbitrary 1.0.1 added const-generic arrays, which requires Rust 1.51
-check_version 1.51.0 || cargo update -p arbitrary --precise 1.0.0
+# arbitrary 1.1.4 started using array::from_fn
+check_version 1.63.0 || cargo update -p arbitrary --precise 1.1.3
 
 set -x
 
@@ -82,22 +79,11 @@ fi
 case "${STD_FEATURES[*]}" in
   *serde*) (
       cd ci/big_serde
-      # serde_test updated to 2021 edition after this version
-      check_version 1.56.0 || (
-        cargo generate-lockfile
-        cargo update -p serde_test --precise 1.0.175
-      )
       cargo test
     ) ;;&
   *rand*) cargo test --manifest-path ci/big_rand/Cargo.toml ;;&
   *quickcheck*) (
       cd ci/big_quickcheck
-      # quote and proc-macro2 updated to 2021 edition after these versions
-      check_version 1.56.0 || (
-        cargo generate-lockfile
-        cargo update -p quote --precise 1.0.30
-        cargo update -p proc-macro2 --precise 1.0.65
-      )
       cargo test
     ) ;;&
 esac

src/lib.rs

@@ -81,7 +81,7 @@
 //!
 //! ## Compatibility
 //!
-//! The `num-bigint` crate is tested for rustc 1.31 and greater.
+//! The `num-bigint` crate is tested for rustc 1.60 and greater.
 
 #![doc(html_root_url = "https://docs.rs/num-bigint/0.4")]
 #![warn(rust_2018_idioms)]