Add as_ptr for primitive enums

Author: termoshtt

lax/src/lib.rs

@@ -141,6 +141,11 @@ impl UPLO {
             UPLO::Lower => UPLO::Upper,
         }
     }
+
+    /// To use Fortran LAPACK API in lapack-sys crate
+    pub fn as_ptr(&self) -> *const i8 {
+        self as *const UPLO as *const i8
+    }
 }
 
 #[derive(Debug, Clone, Copy)]
@@ -151,6 +156,13 @@ pub enum Transpose {
     Hermite = b'C',
 }
 
+impl Transpose {
+    /// To use Fortran LAPACK API in lapack-sys crate
+    pub fn as_ptr(&self) -> *const i8 {
+        self as *const Transpose as *const i8
+    }
+}
+
 #[derive(Debug, Clone, Copy)]
 #[repr(u8)]
 pub enum NormType {
@@ -167,6 +179,11 @@ impl NormType {
             NormType::Frobenius => NormType::Frobenius,
         }
     }
+
+    /// To use Fortran LAPACK API in lapack-sys crate
+    pub fn as_ptr(&self) -> *const i8 {
+        self as *const NormType as *const i8
+    }
 }
 
 /// Create a vector without initialization