From 978544c7771d3bd75d0ee1b9758cc175b65e7112 Mon Sep 17 00:00:00 2001
From: flippette <quangdatle2006@outlook.com>
Date: Mon, 1 Apr 2024 23:46:06 +0700
Subject: [PATCH] Add freestanding `default()`

---
 src/default.rs | 31 +++++++++++++++++++++++++++++++
 src/lib.rs     |  2 ++
 2 files changed, 33 insertions(+)
 create mode 100644 src/default.rs

diff --git a/src/default.rs b/src/default.rs
new file mode 100644
index 0000000..907cb66
--- /dev/null
+++ b/src/default.rs
@@ -0,0 +1,31 @@
+//! Freestanding version of `std::default::Default::default()`.
+
+/// Freestanding version of `std::default::Default::default()`.
+///
+/// Used to be available under `#![feature(default_free_fn)]`,
+/// removed in https://github.com/rust-lang/rust/pull/113469.
+///
+/// # Examples
+///
+/// ```
+/// use stdext::prelude::*;
+///
+/// #[derive(Default, PartialEq, Eq, Debug)]
+/// struct StructWithLongName {
+///     a: u32,
+///     b: u32,
+/// }
+///
+/// let s = StructWithLongName {
+///     a: 12,
+///     ..default() // Normally you have to do
+///                 // `Default::default()`,
+///                 // `<_>::default()` or
+///                 // `StructWithLongName::default()`
+/// };
+///
+/// assert_eq!(s, StructWithLongName { a: 12, ..<_>::default() });
+/// ```
+pub fn default<T: Default>() -> T {
+    T::default()
+}
diff --git a/src/lib.rs b/src/lib.rs
index 4961148..d7c9a4b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -132,6 +132,7 @@
 pub mod duration;
 #[macro_use]
 pub mod macros;
+pub mod default;
 pub mod num;
 pub mod option;
 pub mod result;
@@ -142,6 +143,7 @@ pub mod vec;
 /// A "prelude" module which re-exports all the extension traits for the simple library usage.
 pub mod prelude {
     pub use crate::{
+        default::*,
         duration::*,
         num::{float_convert::*, integer::*},
         option::*,