From 6dcaa9f15adcb612bf02062b0043714fed9f24a1 Mon Sep 17 00:00:00 2001
From: Andreas Buhr <andreas.buhr@3ds.com>
Date: Tue, 2 Sep 2025 15:24:42 +0200
Subject: [PATCH] Make "transform" constexpr

---
 include/boost/parser/parser.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/parser/parser.hpp b/include/boost/parser/parser.hpp
index c701ca49..0e99418c 100644
--- a/include/boost/parser/parser.hpp
+++ b/include/boost/parser/parser.hpp
@@ -6569,7 +6569,7 @@ namespace boost { namespace parser {
     /** Returns a `transform_directive` that uses invocable `F` to do its
         work. */
     template<typename F>
-    auto transform(F f)
+    constexpr auto transform(F f)
     {
         return transform_directive<F>{std::move(f)};
     }