From 90da3afc61225de9610414f9f51e771e08b76d93 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Niko=20B=C3=B6ckerman?= <git.585wj@slmail.me>
Date: Tue, 16 Jun 2026 07:00:57 +0300
Subject: [PATCH 1/2] Configure rustfmt hex_literal_case

This configuration option is recently stabilized and defaults to
"Preserve". Configure it to "Upper" in order to have unified formatting
in the repo.
---
 solvers/rust/rustfmt.toml | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 solvers/rust/rustfmt.toml

diff --git a/solvers/rust/rustfmt.toml b/solvers/rust/rustfmt.toml
new file mode 100644
index 00000000..ceea76ee
--- /dev/null
+++ b/solvers/rust/rustfmt.toml
@@ -0,0 +1 @@
+hex_literal_case = "Upper"

From e834b27820de3f15913f31d70fc77dd6528b3749 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Niko=20H=C3=A4m=C3=A4l=C3=A4inen?= <git.585wj@slmail.me>
Date: Thu, 3 Sep 2026 22:19:24 +0300
Subject: [PATCH 2/2] TEMP: Fail cargo fmt --check if warn about
 hex_literal_case unstable feature

---
 solvers/rust/mise.toml | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/solvers/rust/mise.toml b/solvers/rust/mise.toml
index 8bb73b47..8cc09ae7 100644
--- a/solvers/rust/mise.toml
+++ b/solvers/rust/mise.toml
@@ -7,7 +7,22 @@ depends = [
 ]
 
 [tasks."check:rustfmt"]
-run = "cargo fmt --check"
+run = """
+cargo fmt --check
+
+#set -x
+warnings=$(
+  cargo fmt --check 2>&1 \
+  | grep "Warning:" \
+  | grep hex_literal_case \
+  | grep "unstable features" \
+  | wc -l \
+  | tr -d '[:space:]')
+if [ "$warnings" -gt 0 ]; then
+    echo "Found $warnings warnings" >&2
+    exit 1
+fi
+"""
 
 [tasks.fix]
 depends = [