From 32322f7cabcc0470945d64198f566721871214e4 Mon Sep 17 00:00:00 2001
From: harleywilsoneng <harleywilsoneng@users.noreply.github.com>
Date: Sun, 16 Aug 2026 14:00:31 +0800
Subject: [PATCH] fix: make power_of_two max_bucket_count static constexpr
 (#93)

Signed-off-by: harleywilsoneng <harleywilsoneng@users.noreply.github.com>
---
 include/tsl/robin_growth_policy.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/tsl/robin_growth_policy.h b/include/tsl/robin_growth_policy.h
index 9abba3b..2cdb6cb 100644
--- a/include/tsl/robin_growth_policy.h
+++ b/include/tsl/robin_growth_policy.h
@@ -139,8 +139,12 @@ class power_of_two_growth_policy {
 
   /**
    * Return the maximum number of buckets supported by the policy.
+   *
+   * Static: does not depend on instance state. Calling the non-static form
+   * from the constructor made GCC 16 emit -Wmaybe-uninitialized on the
+   * implicit this pointer (see Tessil/robin-map#93).
    */
-  std::size_t max_bucket_count() const {
+  static constexpr std::size_t max_bucket_count() noexcept {
     // Largest power of two.
     return (std::numeric_limits<std::size_t>::max() / 2) + 1;
   }