fix msrv

Author: bschoenmaeckers

pyo3-ffi/src/compat/py_3_15.rs

@@ -12,7 +12,7 @@ compat_function!(
             return std::ptr::null_mut();
         }
 
-        let writer: *mut crate::PyBytesWriter = crate::PyMem_Malloc(size_of::<crate::PyBytesWriter>()).cast();
+        let writer: *mut crate::PyBytesWriter = crate::PyMem_Malloc(std::mem::size_of::<crate::PyBytesWriter>()).cast();
         if writer.is_null() {
             crate::PyErr_NoMemory();
             return std::ptr::null_mut();
@@ -74,7 +74,7 @@ compat_function!(
                     PyBytesWriter_Discard(writer);
                     return std::ptr::null_mut();
             }
-            std::mem::take(&mut (*writer).obj)
+            std::mem::replace(&mut (*writer).obj, std::ptr::null_mut())
         };
 
         PyBytesWriter_Discard(writer);
@@ -89,7 +89,7 @@ compat_function!(
     #[inline]
     pub unsafe fn _PyBytesWriter_GetAllocated(writer: *mut crate::PyBytesWriter) -> crate::Py_ssize_t {
         if (*writer).obj.is_null() {
-            size_of_val(&(*writer).small_buffer) as _
+            std::mem::size_of_val(&(*writer).small_buffer) as _
         } else {
             crate::PyBytes_Size((*writer).obj)
         }
@@ -212,12 +212,12 @@ unsafe fn _PyBytesWriter_Resize_impl(
         }
 
         if resize > 0 {
-            assert!((size as usize) > size_of_val(&(*writer).small_buffer));
+            assert!((size as usize) > std::mem::size_of_val(&(*writer).small_buffer));
 
             std::ptr::copy_nonoverlapping(
                 (*writer).small_buffer.as_ptr(),
                 crate::PyBytes_AS_STRING((*writer).obj) as *mut _,
-                size_of_val(&(*writer).small_buffer),
+                std::mem::size_of_val(&(*writer).small_buffer),
             );
         }
     }