From 2d13702aea28777abd25d7db4456a9eba10d3a3b Mon Sep 17 00:00:00 2001
From: Josh Stone <cuviper@gmail.com>
Date: Fri, 3 May 2024 15:38:54 -0700
Subject: [PATCH] Implement `Integer::dec` and `inc`

---
 Cargo.toml     | 2 +-
 src/bigint.rs  | 8 ++++++++
 src/biguint.rs | 8 ++++++++
 3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/Cargo.toml b/Cargo.toml
index dc8da257..a3bdcea3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -45,7 +45,7 @@ name = "shootout-pidigits"
 [dependencies]
 
 [dependencies.num-integer]
-version = "0.1.42"
+version = "0.1.46"
 default-features = false
 features = ["i128"]
 
diff --git a/src/bigint.rs b/src/bigint.rs
index 7ab72cb6..d6d524b2 100644
--- a/src/bigint.rs
+++ b/src/bigint.rs
@@ -510,6 +510,14 @@ impl Integer for BigInt {
     fn prev_multiple_of(&self, other: &Self) -> Self {
         self - self.mod_floor(other)
     }
+
+    fn dec(&mut self) {
+        *self -= 1u32;
+    }
+
+    fn inc(&mut self) {
+        *self += 1u32;
+    }
 }
 
 impl Roots for BigInt {
diff --git a/src/biguint.rs b/src/biguint.rs
index 245bcba5..ffa3858a 100644
--- a/src/biguint.rs
+++ b/src/biguint.rs
@@ -325,6 +325,14 @@ impl Integer for BigUint {
     fn prev_multiple_of(&self, other: &Self) -> Self {
         self - self.mod_floor(other)
     }
+
+    fn dec(&mut self) {
+        *self -= 1u32;
+    }
+
+    fn inc(&mut self) {
+        *self += 1u32;
+    }
 }
 
 #[inline]