From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../rust/yoke-derive/examples/yoke_derive.rs       | 86 ++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 third_party/rust/yoke-derive/examples/yoke_derive.rs

(limited to 'third_party/rust/yoke-derive/examples')

diff --git a/third_party/rust/yoke-derive/examples/yoke_derive.rs b/third_party/rust/yoke-derive/examples/yoke_derive.rs
new file mode 100644
index 0000000000..a011d5c241
--- /dev/null
+++ b/third_party/rust/yoke-derive/examples/yoke_derive.rs
@@ -0,0 +1,86 @@
+// This file is part of ICU4X. For terms of use, please see the file
+// called LICENSE at the top level of the ICU4X source tree
+// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
+
+#![allow(unused)]
+
+use std::borrow::Cow;
+use yoke::{Yoke, Yokeable};
+use zerovec::{maps::ZeroMapKV, ule::AsULE, VarZeroVec, ZeroMap, ZeroVec};
+
+#[derive(Yokeable)]
+pub struct StringExample {
+    x: String,
+}
+
+#[derive(Yokeable, Copy, Clone)]
+pub struct IntExample {
+    x: u32,
+}
+
+#[derive(Yokeable, Copy, Clone)]
+pub struct GenericsExample<T> {
+    x: u32,
+    y: T,
+}
+
+#[derive(Yokeable, Copy, Clone)]
+pub struct GenericsExampleWithDefault<T, U = usize> {
+    x: T,
+    y: U,
+}
+
+#[derive(Yokeable)]
+pub struct CowExample<'a> {
+    x: u8,
+    y: &'a str,
+    z: Cow<'a, str>,
+    w: Cow<'a, [u8]>,
+}
+
+#[derive(Yokeable)]
+pub struct ZeroVecExample<'a> {
+    var: VarZeroVec<'a, str>,
+    vec: ZeroVec<'a, u16>,
+}
+
+#[derive(Yokeable)]
+pub struct ZeroVecExampleWithGenerics<'a, T: AsULE> {
+    gen: ZeroVec<'a, T>,
+    vec: ZeroVec<'a, u16>,
+    bare: T,
+}
+
+// Since ZeroMap has generic parameters, the Rust compiler cannot
+// prove the covariance of the lifetimes. To use derive(Yokeable)
+// with a type such as ZeroMap, you just add the attribute
+// yoke(prove_covariance_manually)
+#[derive(Yokeable)]
+#[yoke(prove_covariance_manually)]
+pub struct ZeroMapExample<'a> {
+    map: ZeroMap<'a, str, u16>,
+}
+
+#[derive(Yokeable)]
+#[yoke(prove_covariance_manually)]
+pub struct ZeroMapGenericExample<'a, T: for<'b> ZeroMapKV<'b> + ?Sized> {
+    map: ZeroMap<'a, str, T>,
+}
+
+pub struct AssertYokeable {
+    string: Yoke<StringExample, Box<[u8]>>,
+    int: Yoke<IntExample, Box<[u8]>>,
+    gen1: Yoke<GenericsExample<u32>, Box<[u8]>>,
+    gen2: Yoke<GenericsExample<String>, Box<[u8]>>,
+    gen_default1: Yoke<GenericsExampleWithDefault<String>, Box<[u8]>>,
+    gen_default2: Yoke<GenericsExampleWithDefault<String, u8>, Box<[u8]>>,
+    cow: Yoke<CowExample<'static>, Box<[u8]>>,
+    zv: Yoke<ZeroVecExample<'static>, Box<[u8]>>,
+    zv_gen1: Yoke<ZeroVecExampleWithGenerics<'static, u8>, Box<[u8]>>,
+    zv_gen2: Yoke<ZeroVecExampleWithGenerics<'static, char>, Box<[u8]>>,
+    map: Yoke<ZeroMapExample<'static>, Box<[u8]>>,
+    map_gen1: Yoke<ZeroMapGenericExample<'static, u32>, Box<[u8]>>,
+    map_gen2: Yoke<ZeroMapGenericExample<'static, str>, Box<[u8]>>,
+}
+
+fn main() {}
-- 
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