Merge pull request #41 from xermicus/fix-nostd

Bugfix: fix no_std builds

Author: WaffleLapkin

src/lib.rs

@@ -46,7 +46,9 @@ pub type FxHashSet<V> = HashSet<V, FxBuildHasher>;
 #[cfg(feature = "rand")]
 pub use random_state::{FxHashMapRand, FxHashSetRand, FxRandomState};
 
-pub use seeded_state::{FxHashMapSeed, FxHashSetSeed, FxSeededState};
+pub use seeded_state::FxSeededState;
+#[cfg(feature = "std")]
+pub use seeded_state::{FxHashMapSeed, FxHashSetSeed};
 
 /// A speedy hash algorithm for use within rustc. The hashmap in liballoc
 /// by default uses SipHash which isn't quite as speedy as we want. In the

src/seeded_state.rs

@@ -1,12 +1,12 @@
-use std::collections::{HashMap, HashSet};
-
 use crate::FxHasher;
 
 /// Type alias for a hashmap using the `fx` hash algorithm with [`FxSeededState`].
-pub type FxHashMapSeed<K, V> = HashMap<K, V, FxSeededState>;
+#[cfg(feature = "std")]
+pub type FxHashMapSeed<K, V> = std::collections::HashMap<K, V, FxSeededState>;
 
 /// Type alias for a hashmap using the `fx` hash algorithm with [`FxSeededState`].
-pub type FxHashSetSeed<V> = HashSet<V, FxSeededState>;
+#[cfg(feature = "std")]
+pub type FxHashSetSeed<V> = std::collections::HashSet<V, FxSeededState>;
 
 /// [`FxSetState`] is an alternative state for `HashMap` types, allowing to use [`FxHasher`] with a set seed.
 ///
@@ -41,16 +41,13 @@ impl core::hash::BuildHasher for FxSeededState {
 mod tests {
     use core::hash::BuildHasher;
 
-    use crate::{FxHashMapSeed, FxSeededState};
+    use crate::FxSeededState;
 
     #[test]
     fn different_states_are_different() {
-        let a = FxHashMapSeed::<&str, u32>::with_hasher(FxSeededState::with_seed(1));
-        let b = FxHashMapSeed::<&str, u32>::with_hasher(FxSeededState::with_seed(2));
+        let a = FxSeededState::with_seed(1);
+        let b = FxSeededState::with_seed(2);
 
-        assert_ne!(
-            a.hasher().build_hasher().hash,
-            b.hasher().build_hasher().hash
-        );
+        assert_ne!(a.build_hasher().hash, b.build_hasher().hash);
     }
 }