Use cmp match to replace if chain (comparison_chain)

src/world/mod.rs

@@ -25,6 +25,7 @@ use crate::types::hash::FNVHash;
 use crate::types::{bit, nibble};
 use cgmath::prelude::*;
 use flate2::read::ZlibDecoder;
+use std::cmp::Ordering;
 use std::collections::HashMap;
 use std::collections::VecDeque;
 use std::hash::BuildHasherDefault;
@@ -1270,10 +1271,12 @@ impl Chunk {
             }
         }
         let idx = ((z << 4) | x) as usize;
-        if self.heightmap[idx] < y as u8 {
+        match self.heightmap[idx].cmp(&(y as u8)) {
+            Ordering::Less => {
                 self.heightmap[idx] = y as u8;
                 self.heightmap_dirty = true;
-        } else if self.heightmap[idx] == y as u8 {
+            }
+            Ordering::Equal => {
                 // Find a new lowest
                 for yy in 0..y {
                     let sy = y - yy - 1;
@@ -1285,6 +1288,8 @@ impl Chunk {
                 }
                 self.heightmap_dirty = true;
             }
+            Ordering::Greater => (),
+        }
         true
     }