From bfc6d29f8ef4efc48334cf0c25af433d85c21ed6 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 29 Nov 2012 11:32:44 +0200
Subject: Namespace management for static multi-database support

Now in libodb the odb::core namespace is split into odb::common (database-
independent stuff) and odb::core proper, which imports odb::common. Each
database runtime now defines odb::<db>::core namespace which also imports
odb::common and adds the database-specific bits. The overall idea is that
one can do using namespace odb::<db>::core just like for odb::core.
---
 odb/sqlite/connection.hxx |  1 -
 odb/sqlite/exceptions.hxx |  7 +++++++
 odb/sqlite/forward.hxx    | 16 ++++++++++++++++
 odb/sqlite/query.hxx      |  5 +++++
 odb/sqlite/statement.hxx  |  2 +-
 5 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/odb/sqlite/connection.hxx b/odb/sqlite/connection.hxx
index 2754102..6dd8292 100644
--- a/odb/sqlite/connection.hxx
+++ b/odb/sqlite/connection.hxx
@@ -9,7 +9,6 @@
 
 #include <sqlite3.h>
 
-#include <odb/forward.hxx>
 #include <odb/connection.hxx>
 
 #include <odb/details/mutex.hxx>
diff --git a/odb/sqlite/exceptions.hxx b/odb/sqlite/exceptions.hxx
index 52a976f..a38237c 100644
--- a/odb/sqlite/exceptions.hxx
+++ b/odb/sqlite/exceptions.hxx
@@ -12,6 +12,7 @@
 #include <odb/exceptions.hxx>
 
 #include <odb/sqlite/version.hxx>
+#include <odb/sqlite/forward.hxx>
 #include <odb/sqlite/details/export.hxx>
 
 namespace odb
@@ -65,6 +66,12 @@ namespace odb
     private:
       std::string what_;
     };
+
+    namespace core
+    {
+      using sqlite::database_exception;
+      using sqlite::cli_exception;
+    }
   }
 }
 
diff --git a/odb/sqlite/forward.hxx b/odb/sqlite/forward.hxx
index e2f4df1..382284e 100644
--- a/odb/sqlite/forward.hxx
+++ b/odb/sqlite/forward.hxx
@@ -13,6 +13,13 @@ namespace odb
 {
   namespace sqlite
   {
+    namespace core
+    {
+      using namespace odb::common;
+    }
+
+    //
+    //
     class database;
     class connection;
     typedef details::shared_ptr<connection> connection_ptr;
@@ -21,6 +28,15 @@ namespace odb
     class transaction;
     class tracer;
 
+    namespace core
+    {
+      using sqlite::database;
+      using sqlite::connection;
+      using sqlite::connection_ptr;
+      using sqlite::transaction;
+      using sqlite::statement;
+    }
+
     // Implementation details.
     //
     enum statement_kind
diff --git a/odb/sqlite/query.hxx b/odb/sqlite/query.hxx
index 18c10bb..0f7657c 100644
--- a/odb/sqlite/query.hxx
+++ b/odb/sqlite/query.hxx
@@ -1395,6 +1395,11 @@ namespace odb
       {
       }
     };
+
+    namespace core
+    {
+      using sqlite::query;
+    }
   }
 
   // Derive odb::query from odb::sqlite::query so that it can be
diff --git a/odb/sqlite/statement.hxx b/odb/sqlite/statement.hxx
index aabb57d..fe3a2a0 100644
--- a/odb/sqlite/statement.hxx
+++ b/odb/sqlite/statement.hxx
@@ -14,10 +14,10 @@
 #include <cstring> // std::strlen, std::memcpy
 #include <cassert>
 
-#include <odb/forward.hxx>
 #include <odb/statement.hxx>
 
 #include <odb/sqlite/version.hxx>
+#include <odb/sqlite/forward.hxx>
 #include <odb/sqlite/binding.hxx>
 #include <odb/sqlite/connection.hxx>
 #include <odb/sqlite/auto-handle.hxx>
-- 
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