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.

5 files changed, 29 insertions, 3 deletions

diff --git a/odb/pgsql/connection.hxx b/odb/pgsql/connection.hxx
index 9c53b77..472ee63 100644
--- a/odb/pgsql/connection.hxx
+++ b/odb/pgsql/connection.hxx
@@ -7,7 +7,6 @@
 
 #include <odb/pre.hxx>
 
-#include <odb/forward.hxx>
 #include <odb/connection.hxx>
 
 #include <odb/details/shared-ptr.hxx>
diff --git a/odb/pgsql/exceptions.hxx b/odb/pgsql/exceptions.hxx
index 3cf89e4..6329424 100644
--- a/odb/pgsql/exceptions.hxx
+++ b/odb/pgsql/exceptions.hxx
@@ -12,7 +12,7 @@
 #include <odb/exceptions.hxx>
 
 #include <odb/pgsql/version.hxx>
-
+#include <odb/pgsql/forward.hxx>
 #include <odb/pgsql/details/export.hxx>
 
 namespace odb
@@ -60,6 +60,12 @@ namespace odb
     private:
       std::string what_;
     };
+
+    namespace core
+    {
+      using pgsql::database_exception;
+      using pgsql::cli_exception;
+    }
   }
 }
 
diff --git a/odb/pgsql/forward.hxx b/odb/pgsql/forward.hxx
index e164bf1..d028f4d 100644
--- a/odb/pgsql/forward.hxx
+++ b/odb/pgsql/forward.hxx
@@ -13,6 +13,13 @@ namespace odb
 {
   namespace pgsql
   {
+    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 pgsql::database;
+      using pgsql::connection;
+      using pgsql::connection_ptr;
+      using pgsql::transaction;
+      using pgsql::statement;
+    }
+
     // Implementation details.
     //
     enum statement_kind
diff --git a/odb/pgsql/query.hxx b/odb/pgsql/query.hxx
index 997f206..9d0b333 100644
--- a/odb/pgsql/query.hxx
+++ b/odb/pgsql/query.hxx
@@ -1866,6 +1866,11 @@ namespace odb
       {
       }
     };
+
+    namespace core
+    {
+      using pgsql::query;
+    }
   }
 
   // Derive odb::query from odb::pgsql::query so that it can be
diff --git a/odb/pgsql/statement.hxx b/odb/pgsql/statement.hxx
index c062fea..e406da3 100644
--- a/odb/pgsql/statement.hxx
+++ b/odb/pgsql/statement.hxx
@@ -10,10 +10,10 @@
 #include <string>
 #include <cstddef>  // std::size_t
 
-#include <odb/forward.hxx>
 #include <odb/statement.hxx>
 
 #include <odb/pgsql/version.hxx>
+#include <odb/pgsql/forward.hxx>
 #include <odb/pgsql/binding.hxx>
 #include <odb/pgsql/pgsql-fwd.hxx> // PGresult
 #include <odb/pgsql/connection.hxx>