From 2cc6d68c07e8256c96d01db395469114a1c12d80 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=9B=D0=B5=D0=BE=D0=BD=D0=B8=D0=B4=20=D0=AE=D1=80=D1=8C?=
 =?UTF-8?q?=D0=B5=D0=B2=20=28Leonid=20Yuriev=29?= <leo@yuriev.ru>
Date: Sun, 31 Mar 2024 14:23:23 +0300
Subject: [PATCH] =?UTF-8?q?mdbx++:=20=D0=B4=D0=BE=D0=B1=D0=B0=D0=B2=D0=BB?=
 =?UTF-8?q?=D0=B5=D0=BD=D0=B8=D0=B5=20`txn::open=5Fmap=5Faccede()`.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 mdbx.h++ | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/mdbx.h++ b/mdbx.h++
index 008dd808..884fb216 100644
--- a/mdbx.h++
+++ b/mdbx.h++
@@ -4386,6 +4386,11 @@ public:
       const ::mdbx::key_mode key_mode = ::mdbx::key_mode::usual,
       const ::mdbx::value_mode value_mode = ::mdbx::value_mode::single) const;
 
+  /// \brief Open existing key-value map.
+  inline map_handle open_map_accede(const char *name) const;
+  /// \brief Open existing key-value map.
+  inline map_handle open_map_accede(const ::std::string &name) const;
+
   /// \brief Create new or open existing key-value map.
   inline map_handle
   create_map(const char *name,
@@ -4441,6 +4446,8 @@ public:
       const ::std::string_view &name,
       const ::mdbx::key_mode key_mode = ::mdbx::key_mode::usual,
       const ::mdbx::value_mode value_mode = ::mdbx::value_mode::single) const;
+  /// \brief Open existing key-value map.
+  inline map_handle open_map_accede(const ::std::string_view &name) const;
   /// \brief Create new or open existing key-value map.
   inline map_handle
   create_map(const ::std::string_view &name,
@@ -6405,6 +6412,14 @@ txn::open_map(const char *name, const ::mdbx::key_mode key_mode,
   return map;
 }
 
+inline ::mdbx::map_handle txn::open_map_accede(const char *name) const {
+  ::mdbx::map_handle map;
+  error::success_or_throw(
+      ::mdbx_dbi_open(handle_, name, MDBX_DB_ACCEDE, &map.dbi));
+  assert(map.dbi != 0);
+  return map;
+}
+
 inline ::mdbx::map_handle txn::create_map(const char *name,
                                           const ::mdbx::key_mode key_mode,
                                           const ::mdbx::value_mode value_mode) {
@@ -6443,6 +6458,15 @@ txn::open_map(const ::std::string_view &name, const ::mdbx::key_mode key_mode,
   return map;
 }
 
+inline ::mdbx::map_handle
+txn::open_map_accede(const ::std::string_view &name) const {
+  ::mdbx::map_handle map;
+  error::success_or_throw(
+      ::mdbx_dbi_open2(handle_, ::mdbx::slice(name), MDBX_DB_ACCEDE, &map.dbi));
+  assert(map.dbi != 0);
+  return map;
+}
+
 inline ::mdbx::map_handle txn::create_map(const ::std::string_view &name,
                                           const ::mdbx::key_mode key_mode,
                                           const ::mdbx::value_mode value_mode) {
@@ -6467,6 +6491,11 @@ txn::open_map(const ::std::string &name, const ::mdbx::key_mode key_mode,
   return open_map(::std::string_view(name), key_mode, value_mode);
 }
 
+inline ::mdbx::map_handle
+txn::open_map_accede(const ::std::string &name) const {
+  return open_map_accede(::std::string_view(name));
+}
+
 inline ::mdbx::map_handle txn::create_map(const ::std::string &name,
                                           const ::mdbx::key_mode key_mode,
                                           const ::mdbx::value_mode value_mode) {
@@ -6493,6 +6522,11 @@ txn::open_map(const ::std::string &name, const ::mdbx::key_mode key_mode,
   return open_map(name.c_str(), key_mode, value_mode);
 }
 
+inline ::mdbx::map_handle
+txn::open_map_accede(const ::std::string &name) const {
+  return open_map_accede(name.c_str());
+}
+
 inline ::mdbx::map_handle txn::create_map(const ::std::string &name,
                                           const ::mdbx::key_mode key_mode,
                                           const ::mdbx::value_mode value_mode) {