From 25dc75050aee18ff42342bdb64c1e97542d17267 Mon Sep 17 00:00:00 2001
From: Michael Leonhard <michael@leonhardllc.com>
Date: Mon, 15 Apr 2024 13:07:18 -0700
Subject: [PATCH] Replace `features_check` mod with a call to
 `std::compile_error!`.  Fixes https://github.com/serde-rs/json/issues/1123 .

---
 src/features_check/error.rs |  1 -
 src/features_check/mod.rs   | 13 -------------
 src/lib.rs                  |  5 +++--
 3 files changed, 3 insertions(+), 16 deletions(-)
 delete mode 100644 src/features_check/error.rs
 delete mode 100644 src/features_check/mod.rs

diff --git a/src/features_check/error.rs b/src/features_check/error.rs
deleted file mode 100644
index 22e58235c..000000000
--- a/src/features_check/error.rs
+++ /dev/null
@@ -1 +0,0 @@
-"serde_json requires that either `std` (default) or `alloc` feature is enabled"
diff --git a/src/features_check/mod.rs b/src/features_check/mod.rs
deleted file mode 100644
index d12032cef..000000000
--- a/src/features_check/mod.rs
+++ /dev/null
@@ -1,13 +0,0 @@
-//! Shows a user-friendly compiler error on incompatible selected features.
-
-#[allow(unused_macros)]
-macro_rules! hide_from_rustfmt {
-    ($mod:item) => {
-        $mod
-    };
-}
-
-#[cfg(not(any(feature = "std", feature = "alloc")))]
-hide_from_rustfmt! {
-    mod error;
-}
diff --git a/src/lib.rs b/src/lib.rs
index 32c4fc456..b6f183a17 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -363,6 +363,9 @@
 #![no_std]
 #![cfg_attr(docsrs, feature(doc_cfg))]
 
+#[cfg(not(any(feature = "std", feature = "alloc")))]
+compile_error!("serde_json requires that either `std` (default) or `alloc` feature is enabled");
+
 extern crate alloc;
 
 #[cfg(feature = "std")]
@@ -409,8 +412,6 @@ pub mod ser;
 mod ser;
 pub mod value;
 
-mod features_check;
-
 mod io;
 #[cfg(feature = "std")]
 mod iter;