feat: add a SupersetOf<f32> requirement for the ComplexField and SimdComplexField traits (#59)

Author: sebcrozet

CHANGELOG

@@ -5,6 +5,8 @@
 - Add the `portable_simd` feature for supporting `std::simd`.
 - The `ClosedAdd, ClosedMul, etc.` traits no longer require `AddAssign, MulAssign`. Instead they are required for new
   traits named `ClosedAddAssign, ClosedMulAssign, etc.`
+- The `ComplexField` and `SimdComplexField` (and, by extension, `RealField` and `SimdRealField`) traits now depend on the
+  `SupersetOf<f32>` trait in addition to `SupersetOf<f64>`.
 
 ## Release v0.8.1 (04 Apr. 2023)
 - Add implementation of `rkyv` serialization/deserialization to the `Wide*` wrapper types.

src/scalar/complex.rs

@@ -161,6 +161,7 @@ macro_rules! complex_trait_methods (
 #[allow(missing_docs)]
 pub trait ComplexField:
 SubsetOf<Self>
++ SupersetOf<f32>
 + SupersetOf<f64>
 + FromPrimitive
 + Field<Element=Self, SimdBool=bool>

src/scalar/fixed_impl.rs

@@ -316,6 +316,28 @@ macro_rules! impl_fixed_type (
             }
         }
 
+        impl<Fract: $LeEqDim> SubsetOf<$FixedI<Fract>> for f32 {
+            #[inline]
+            fn to_superset(&self) -> $FixedI<Fract> {
+                $FixedI(fixed::$FixedI::from_num(*self))
+            }
+
+            #[inline]
+            fn from_superset(element: &$FixedI<Fract>) -> Option<Self> {
+                Some(Self::from_superset_unchecked(element))
+            }
+
+            #[inline]
+            fn from_superset_unchecked(element: &$FixedI<Fract>) -> Self {
+                element.0.to_num::<f32>()
+            }
+
+            #[inline]
+            fn is_in_subset(_: &$FixedI<Fract>) -> bool {
+                true
+            }
+        }
+
         impl<Fract: $LeEqDim> SubsetOf<$FixedI<Fract>> for $FixedI<Fract> {
             #[inline]
             fn to_superset(&self) -> $FixedI<Fract> {

src/simd/simd_complex.rs

@@ -12,24 +12,25 @@ use crate::simd::{SimdRealField, SimdValue};
 /// Each lane of an SIMD complex field should contain one complex field.
 #[allow(missing_docs)]
 pub trait SimdComplexField:
-    SubsetOf<Self>
-    + SupersetOf<f64>
-    + Field
-    + Clone
-    + Neg<Output = Self>
+SubsetOf<Self>
++ SupersetOf<f32>
++ SupersetOf<f64>
++ Field
++ Clone
++ Neg<Output=Self>
 //    + MeetSemilattice
 //    + JoinSemilattice
-    + Send
-    + Sync
-    + Any
-    + 'static
-    + Debug
-    + NumAssignOps
-    + NumOps
-    + PartialEq
++ Send
++ Sync
++ Any
++ 'static
++ Debug
++ NumAssignOps
++ NumOps
++ PartialEq
 {
     /// Type of the coefficients of a complex number.
-    type SimdRealField: SimdRealField<SimdBool = <Self as SimdValue>::SimdBool>;
+    type SimdRealField: SimdRealField<SimdBool=<Self as SimdValue>::SimdBool>;
     complex_trait_methods!(SimdRealField, simd_);
 
     /// Computes the sum of all the lanes of `self`.