From e55570f581c8f063c116691fa5cbb1593cfe3af6 Mon Sep 17 00:00:00 2001
From: cyrgani <ansgar.w.zielke@gmail.com>
Date: Sun, 13 Apr 2025 23:13:40 +0200
Subject: [PATCH] loosen `Fn(Response)` to `FnOnce(Response)` in
 `fs::load_file`

---
 src/fs.rs         | 10 +++++-----
 src/native/ios.rs |  2 +-
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/fs.rs b/src/fs.rs
index 2212b042..d8c62620 100644
--- a/src/fs.rs
+++ b/src/fs.rs
@@ -35,7 +35,7 @@ impl std::error::Error for Error {}
 pub type Response = Result<Vec<u8>, Error>;
 
 /// Filesystem path on desktops or HTTP URL in WASM
-pub fn load_file<F: Fn(Response) + 'static>(path: &str, on_loaded: F) {
+pub fn load_file<F: FnOnce(Response) + 'static>(path: &str, on_loaded: F) {
     #[cfg(target_arch = "wasm32")]
     wasm::load_file(path, on_loaded);
 
@@ -50,7 +50,7 @@ pub fn load_file<F: Fn(Response) + 'static>(path: &str, on_loaded: F) {
 }
 
 #[cfg(target_os = "android")]
-fn load_file_android<F: Fn(Response)>(path: &str, on_loaded: F) {
+fn load_file_android<F: FnOnce(Response)>(path: &str, on_loaded: F) {
     fn load_file_sync(path: &str) -> Response {
         use crate::native;
 
@@ -84,7 +84,7 @@ mod wasm {
 
     thread_local! {
         #[allow(clippy::type_complexity)]
-        static FILES: RefCell<HashMap<u32, Box<dyn Fn(Response)>>> = RefCell::new(HashMap::new());
+        static FILES: RefCell<HashMap<u32, Box<dyn FnOnce(Response)>>> = RefCell::new(HashMap::new());
     }
 
     #[no_mangle]
@@ -109,7 +109,7 @@ mod wasm {
         })
     }
 
-    pub fn load_file<F: Fn(Response) + 'static>(path: &str, on_loaded: F) {
+    pub fn load_file<F: FnOnce(Response) + 'static>(path: &str, on_loaded: F) {
         use native::wasm::fs;
         use std::ffi::CString;
 
@@ -123,7 +123,7 @@ mod wasm {
 }
 
 #[cfg(not(any(target_arch = "wasm32", target_os = "android", target_os = "ios")))]
-fn load_file_desktop<F: Fn(Response)>(path: &str, on_loaded: F) {
+fn load_file_desktop<F: FnOnce(Response)>(path: &str, on_loaded: F) {
     fn load_file_sync(path: &str) -> Response {
         use std::fs::File;
         use std::io::Read;
diff --git a/src/native/ios.rs b/src/native/ios.rs
index a98831ed..abededd7 100644
--- a/src/native/ios.rs
+++ b/src/native/ios.rs
@@ -782,7 +782,7 @@ pub fn log(message: &str) {
     let _: () = unsafe { frameworks::NSLog(nsstring) };
 }
 
-pub fn load_file<F: Fn(crate::fs::Response) + 'static>(path: &str, on_loaded: F) {
+pub fn load_file<F: FnOnce(crate::fs::Response) + 'static>(path: &str, on_loaded: F) {
     let path = std::path::Path::new(&path);
     let path_without_extension = path.with_extension("");
     let path_without_extension = path_without_extension.to_str().unwrap();