Upgrade to 2018 edition, MSRV 1.31

.github/workflows/ci.yaml

@@ -12,7 +12,12 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: [1.8.0, 1.15.0, 1.20.0, 1.26.0, 1.31.0, stable, beta, nightly]
+        rust: [
+          1.31.0, # MSRV
+          stable,
+          beta,
+          nightly,
+        ]
     steps:
       - uses: actions/checkout@v3
       - uses: dtolnay/rust-toolchain@master
@@ -30,7 +35,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
         with:
           target: thumbv6m-none-eabi
-      - run: cargo build --target thumbv6m-none-eabi --no-default-features --features i128
+      - run: cargo build --target thumbv6m-none-eabi --no-default-features
 
   fmt:
     name: Format

.github/workflows/master.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: [1.8.0, stable]
+        rust: [1.31.0, stable]
     steps:
       - uses: actions/checkout@v3
       - uses: dtolnay/rust-toolchain@master

.github/workflows/pr.yaml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: [1.8.0, stable]
+        rust: [1.31.0, stable]
     steps:
       - uses: actions/checkout@v3
       - uses: dtolnay/rust-toolchain@master

Cargo.toml

@@ -10,20 +10,21 @@ repository = "https://github.com/rust-num/num-integer"
 name = "num-integer"
 version = "0.1.45"
 readme = "README.md"
-build = "build.rs"
 exclude = ["/bors.toml", "/ci/*", "/.github/*"]
+edition = "2018"
+rust-version = "1.31"
 
 [package.metadata.docs.rs]
 features = ["std"]
 
 [dependencies.num-traits]
 version = "0.2.11"
 default-features = false
+features = ["i128"]
 
 [features]
 default = ["std"]
-i128 = ["num-traits/i128"]
 std = ["num-traits/std"]
 
-[build-dependencies]
-autocfg = "1"
+# vestigial features, now always in effect
+i128 = []

README.md

@@ -2,7 +2,7 @@
 
 [![crate](https://img.shields.io/crates/v/num-integer.svg)](https://crates.io/crates/num-integer)
 [![documentation](https://docs.rs/num-integer/badge.svg)](https://docs.rs/num-integer)
-[![minimum rustc 1.8](https://img.shields.io/badge/rustc-1.8+-red.svg)](https://rust-lang.github.io/rfcs/2495-min-rust-version.html)
+[![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)
 [![build status](https://github.com/rust-num/num-integer/workflows/master/badge.svg)](https://github.com/rust-num/num-integer/actions)
 
 `Integer` trait and functions for Rust.
@@ -16,12 +16,6 @@ Add this to your `Cargo.toml`:
 num-integer = "0.1"
 ```
 
-and this to your crate root:
-
-```rust
-extern crate num_integer;
-```
-
 ## Features
 
 This crate can be used without the standard library (`#![no_std]`) by disabling
@@ -36,17 +30,13 @@ default-features = false
 There is no functional difference with and without `std` at this time, but
 there may be in the future.
 
-Implementations for `i128` and `u128` are only available with Rust 1.26 and
-later.  The build script automatically detects this, but you can make it
-mandatory by enabling the `i128` crate feature.
-
 ## Releases
 
 Release notes are available in [RELEASES.md](RELEASES.md).
 
 ## Compatibility
 
-The `num-integer` crate is tested for rustc 1.8 and greater.
+The `num-integer` crate is tested for rustc 1.31 and greater.
 
 ## License
 

benches/average.rs

@@ -2,8 +2,6 @@
 
 #![feature(test)]
 
-extern crate num_integer;
-extern crate num_traits;
 extern crate test;
 
 use num_integer::Integer;
@@ -143,12 +141,10 @@ where
                 assert_eq!(rt - a, b - rt + T::one());
             }
         // if both number have a different sign,
+        } else if (a + b).is_even() {
+            assert_eq!(rt, (a + b) / (T::one() + T::one()))
         } else {
-            if (a + b).is_even() {
-                assert_eq!(rt, (a + b) / (T::one() + T::one()))
-            } else {
-                assert_eq!(rt, (a + b + T::one()) / (T::one() + T::one()))
-            }
+            assert_eq!(rt, (a + b + T::one()) / (T::one() + T::one()))
         }
     }
     bench_unchecked(b, v, f);
@@ -170,12 +166,10 @@ where
                 assert_eq!(rt - a + T::one(), b - rt);
             }
         // if both number have a different sign,
+        } else if (a + b).is_even() {
+            assert_eq!(rt, (a + b) / (T::one() + T::one()))
         } else {
-            if (a + b).is_even() {
-                assert_eq!(rt, (a + b) / (T::one() + T::one()))
-            } else {
-                assert_eq!(rt, (a + b - T::one()) / (T::one() + T::one()))
-            }
+            assert_eq!(rt, (a + b - T::one()) / (T::one() + T::one()))
         }
     }
     bench_unchecked(b, v, f);

benches/gcd.rs

@@ -2,8 +2,6 @@
 
 #![feature(test)]
 
-extern crate num_integer;
-extern crate num_traits;
 extern crate test;
 
 use num_integer::Integer;

benches/roots.rs

@@ -2,8 +2,6 @@
 
 #![feature(test)]
 
-extern crate num_integer;
-extern crate num_traits;
 extern crate test;
 
 use num_integer::Integer;
@@ -125,42 +123,42 @@ macro_rules! bench_roots {
 
             #[bench]
             fn sqrt_rand(b: &mut Bencher) {
-                ::bench_rand_pos(b, $T::sqrt, 2);
+                crate::bench_rand_pos(b, $T::sqrt, 2);
             }
 
             #[bench]
             fn sqrt_small(b: &mut Bencher) {
-                ::bench_small_pos(b, $T::sqrt, 2);
+                crate::bench_small_pos(b, $T::sqrt, 2);
             }
 
             #[bench]
             fn cbrt_rand(b: &mut Bencher) {
-                ::bench_rand(b, $T::cbrt, 3);
+                crate::bench_rand(b, $T::cbrt, 3);
             }
 
             #[bench]
             fn cbrt_small(b: &mut Bencher) {
-                ::bench_small(b, $T::cbrt, 3);
+                crate::bench_small(b, $T::cbrt, 3);
             }
 
             #[bench]
             fn fourth_root_rand(b: &mut Bencher) {
-                ::bench_rand_pos(b, |x: &$T| x.nth_root(4), 4);
+                crate::bench_rand_pos(b, |x: &$T| x.nth_root(4), 4);
             }
 
             #[bench]
             fn fourth_root_small(b: &mut Bencher) {
-                ::bench_small_pos(b, |x: &$T| x.nth_root(4), 4);
+                crate::bench_small_pos(b, |x: &$T| x.nth_root(4), 4);
             }
 
             #[bench]
             fn fifth_root_rand(b: &mut Bencher) {
-                ::bench_rand(b, |x: &$T| x.nth_root(5), 5);
+                crate::bench_rand(b, |x: &$T| x.nth_root(5), 5);
             }
 
             #[bench]
             fn fifth_root_small(b: &mut Bencher) {
-                ::bench_small(b, |x: &$T| x.nth_root(5), 5);
+                crate::bench_small(b, |x: &$T| x.nth_root(5), 5);
             }
         }
     )*}

bors.toml

@@ -1,8 +1,4 @@
 status = [
-  "Test (1.8.0)",
-  "Test (1.15.0)",
-  "Test (1.20.0)",
-  "Test (1.26.0)",
   "Test (1.31.0)",
   "Test (stable)",
   "Test (beta)",

ci/rustup.sh

@@ -5,6 +5,6 @@
 set -ex
 
 ci=$(dirname $0)
-for version in 1.8.0 1.15.0 1.20.0 1.26.0 1.31.0 stable beta nightly; do
+for version in 1.31.0 stable beta nightly; do
     rustup run "$version" "$ci/test_full.sh"
 done

ci/test_full.sh

@@ -3,7 +3,7 @@
 set -e
 
 CRATE=num-integer
-MSRV=1.8
+MSRV=1.31
 
 get_rust_version() {
   local array=($(rustc --version));
@@ -28,7 +28,6 @@ if ! check_version $MSRV ; then
 fi
 
 FEATURES=()
-check_version 1.26 && FEATURES+=(i128)
 echo "Testing supported features: ${FEATURES[*]}"
 
 set -x

src/average.rs

@@ -1,5 +1,5 @@
+use crate::Integer;
 use core::ops::{BitAnd, BitOr, BitXor, Shr};
-use Integer;
 
 /// Provides methods to compute the average of two integers, without overflows.
 pub trait Average: Integer {