feat: Introduce new_persistent method for ZString (#204)

Author: jmjoy

phper/src/enums.rs

@@ -37,7 +37,7 @@ use std::{
     cell::RefCell,
     ffi::{CStr, CString},
     marker::PhantomData,
-    mem::{MaybeUninit, zeroed},
+    mem::{ManuallyDrop, zeroed},
     ptr::{null, null_mut},
     rc::Rc,
 };
@@ -528,15 +528,8 @@ unsafe fn register_enum_case(
                 );
             }
             Scalar::String(value) => {
-                #[allow(clippy::useless_conversion)]
-                let value_ptr = phper_zend_string_init(
-                    value.as_ptr().cast(),
-                    value.len().try_into().unwrap(),
-                    true.into(),
-                );
-                let mut value = MaybeUninit::<zval>::uninit();
-                phper_zval_str(value.as_mut_ptr(), value_ptr);
-
+                let value = ZString::new_persistent(value);
+                let mut value = ManuallyDrop::new(ZVal::from(value));
                 zend_enum_add_case_cstr(class_ce, case_name.as_ptr(), value.as_mut_ptr());
             }
             Scalar::Null => {

phper/src/strings.rs

@@ -194,6 +194,17 @@ impl ZString {
         }
     }
 
+    /// Creates a new persistent zend string from a container of bytes.
+    #[allow(clippy::useless_conversion)]
+    pub fn new_persistent(s: impl AsRef<[u8]>) -> Self {
+        unsafe {
+            let s = s.as_ref();
+            let ptr =
+                phper_zend_string_init(s.as_ptr().cast(), s.len().try_into().unwrap(), true.into());
+            Self::from_raw(ptr)
+        }
+    }
+
     /// Create owned object From raw pointer, usually used in pairs with
     /// `into_raw`.
     ///