AsPtr helper trait to get pointer of slice

lax/src/lib.rs

@@ -126,6 +126,31 @@ impl Lapack for f64 {}
 impl Lapack for c32 {}
 impl Lapack for c64 {}
 
+/// Helper for getting pointer of slice
+pub(crate) trait AsPtr: Sized {
+ type Elem;
+ fn as_ptr(vec: &[Self]) -> *const Self::Elem;
+ fn as_mut_ptr(vec: &mut [Self]) -> *mut Self::Elem;
+}
+
+macro_rules! impl_as_ptr {
+ ($target:ty, $elem:ty) => {
+ impl AsPtr for $target {
+ type Elem = $elem;
+ fn as_ptr(vec: &[Self]) -> *const Self::Elem {
+ vec.as_ptr() as *const _
+ }
+ fn as_mut_ptr(vec: &mut [Self]) -> *mut Self::Elem {
+ vec.as_mut_ptr() as *mut _
+ }
+ }
+ };
+}
+impl_as_ptr!(f32, f32);
+impl_as_ptr!(f64, f64);
+impl_as_ptr!(c32, lapack_sys::__BindgenComplex<f32>);
+impl_as_ptr!(c64, lapack_sys::__BindgenComplex<f64>);
+
 /// Upper/Lower specification for seveal usages
 #[derive(Debug, Clone, Copy)]
 #[repr(u8)]