From de172ca3fe3e6fcc3d4ecc1b334127dc35104cf9 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Wed, 15 Nov 2023 09:54:54 -0700
Subject: [PATCH] Annotate Lazy functions for 'requires' clauses.

---
 include/deal.II/base/lazy.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/deal.II/base/lazy.h b/include/deal.II/base/lazy.h
index 2375e86813..01653affbf 100644
--- a/include/deal.II/base/lazy.h
+++ b/include/deal.II/base/lazy.h
@@ -135,6 +135,8 @@ public:
    * of the calling threads and that after completion the initialization
    * result (which is stored in the std::optional) is visible on all
    * threads.
+   *
+   * @dealiiConceptRequires{std::is_invocable_r_v<T, Callable>}
    */
   template <typename Callable>
   void
@@ -184,6 +186,8 @@ public:
    *
    * @post The underlying object is initialized, meaning, has_value()
    * returns true.
+   *
+   * @dealiiConceptRequires{std::is_invocable_r_v<T, Callable>}
    */
   template <typename Callable>
   const T &
@@ -193,6 +197,8 @@ public:
 
   /**
    * Variant of above function that returns a non-const reference.
+   *
+   * @dealiiConceptRequires{std::is_invocable_r_v<T, Callable>}
    */
   template <typename Callable>
   DEAL_II_ALWAYS_INLINE inline T &
-- 
2.39.5