From baa330c49c8f598c67296175e1fb165abacebaca Mon Sep 17 00:00:00 2001
From: messense <messense@icloud.com>
Date: Sun, 1 Dec 2024 10:38:16 +0800
Subject: [PATCH] Use once_cell to lower MSRV

std `LazyLock` requires Rust 1.80 which is bit too new for using this in maturin.
---
 Cargo.lock     | 3 ++-
 Cargo.toml     | 1 +
 src/version.rs | 5 ++---
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 6880c01..fe20580 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "bytecheck"
@@ -96,6 +96,7 @@ name = "pep440_rs"
 version = "0.7.2"
 dependencies = [
  "indoc",
+ "once_cell",
  "rkyv",
  "serde",
  "tracing",
diff --git a/Cargo.toml b/Cargo.toml
index e623875..0ea61f6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,6 +14,7 @@ name = "pep440_rs"
 crate-type = ["rlib", "cdylib"]
 
 [dependencies]
+once_cell = { version = "1.20.2" }
 serde = { version = "1.0.210", features = ["derive"] }
 rkyv = { version = "0.8.8", optional = true }
 tracing = { version = "0.1.40", optional = true }
diff --git a/src/version.rs b/src/version.rs
index 26b3831..36fca64 100644
--- a/src/version.rs
+++ b/src/version.rs
@@ -1,5 +1,5 @@
+use once_cell::sync::Lazy;
 use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
-use std::sync::LazyLock;
 use std::{
     borrow::Borrow,
     cmp::Ordering,
@@ -2395,8 +2395,7 @@ fn parse_u64(bytes: &[u8]) -> Result<u64, VersionParseError> {
 }
 
 /// The minimum version that can be represented by a [`Version`]: `0a0.dev0`.
-pub static MIN_VERSION: LazyLock<Version> =
-    LazyLock::new(|| Version::from_str("0a0.dev0").unwrap());
+pub static MIN_VERSION: Lazy<Version> = Lazy::new(|| Version::from_str("0a0.dev0").unwrap());
 
 #[cfg(test)]
 mod tests;