#7 ctors.rs

src/ctors.rs

@@ -0,0 +1,44 @@
+// Copyright (c) 2023 Yegor Bugayenko
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+use crate::{Map, Pair};
+use std::mem::MaybeUninit;
+
+impl<K: Copy + PartialEq, V: Clone + Copy, const N: usize> Map<K, V, N> {
+    /// Make it.
+    #[inline]
+    #[must_use]
+    pub fn new() -> Self {
+        Self {
+            next: 0,
+            pairs: unsafe { *MaybeUninit::<[Pair<K, V>; N]>::uninit().as_mut_ptr() },
+        }
+    }
+}
+
+#[cfg(test)]
+use anyhow::Result;
+
+#[test]
+fn makes_new_map() -> Result<()> {
+    let m: Map<u8, u8, 8> = Map::new();
+    assert_eq!(0, m.len());
+    Ok(())
+}

src/lib.rs

@@ -35,6 +35,7 @@
 #![allow(clippy::multiple_inherent_impl)]
 #![allow(clippy::multiple_crate_versions)]
 
+mod ctors;
 mod debug;
 mod iterators;
 mod map;

src/map.rs

@@ -19,8 +19,7 @@
 // SOFTWARE.
 
 use crate::Pair::{Absent, Present};
-use crate::{IntoIter, Iter, Map, Pair};
-use std::mem::MaybeUninit;
+use crate::{IntoIter, Iter, Map};
 
 impl<K: Copy + PartialEq, V: Clone + Copy, const N: usize> Default for Map<K, V, N> {
     fn default() -> Self {
@@ -29,16 +28,6 @@ impl<K: Copy + PartialEq, V: Clone + Copy, const N: usize> Default for Map<K, V,
 }
 
 impl<K: Copy + PartialEq, V: Clone + Copy, const N: usize> Map<K, V, N> {
-    /// Make it.
-    #[inline]
-    #[must_use]
-    pub fn new() -> Self {
-        Self {
-            next: 0,
-            pairs: unsafe { *MaybeUninit::<[Pair<K, V>; N]>::uninit().as_mut_ptr() },
-        }
-    }
-
     /// Make an iterator over all pairs.
     #[inline]
     #[must_use]