From 9e56a36766ea7d669c73a1db9b4f584960b6f174 Mon Sep 17 00:00:00 2001
From: Taiki Endo <te316e89@gmail.com>
Date: Mon, 4 Mar 2024 04:41:16 +0900
Subject: [PATCH] Always set #![no_std] to fix redundant import warning

```
error: the item `Vec` is imported redundantly
   --> src/lib.rs:123:24
    |
123 | use alloc::vec::{self, Vec};
    |                        ^^^
    |
   ::: /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/prelude/mod.rs:115:13
    |
115 |     pub use super::v1::*;
    |             --------- the item `Vec` is already defined here
    |
    = note: `-D unused-imports` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(unused_imports)]`
```
---
 src/lib.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index 7fc6f1a..8abec35 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-#![cfg_attr(not(feature = "std"), no_std)]
+#![no_std]
 #![warn(
     missing_debug_implementations,
     missing_docs,
@@ -113,6 +113,8 @@
 #[cfg(not(feature = "std"))]
 extern crate alloc;
 #[cfg(feature = "std")]
+extern crate std;
+#[cfg(feature = "std")]
 extern crate std as alloc;
 
 #[cfg(feature = "serde")]