Generate add/drop foreign key migration statements

Also add the --fkeys-deferrable-mode option. General schemas generation
rework.

1 files changed, 56 insertions, 0 deletions

diff --git a/odb/semantics/relational/deferrable.cxx b/odb/semantics/relational/deferrable.cxx
new file mode 100644
index 0000000..6aecb12
--- /dev/null
+++ b/odb/semantics/relational/deferrable.cxx
@@ -0,0 +1,56 @@
+// file      : odb/semantics/relational/deferrable.cxx
+// copyright : Copyright (c) 2009-2013 Code Synthesis Tools CC
+// license   : GNU GPL v3; see accompanying LICENSE file
+
+#include <ostream>
+#include <istream>
+
+#include <odb/semantics/relational/deferrable.hxx>
+
+using namespace std;
+
+namespace semantics
+{
+  namespace relational
+  {
+    static const char* deferrable_[] =
+    {
+      "NOT DEFERRABLE",
+      "IMMEDIATE",
+      "DEFERRED"
+    };
+
+    string deferrable::
+    string () const
+    {
+      return deferrable_[v_];
+    }
+
+    ostream&
+    operator<< (ostream& os, deferrable const& v)
+    {
+      return os << v.string ();
+    }
+
+    istream&
+    operator>> (istream& is, deferrable& v)
+    {
+      string s;
+      is >> s;
+
+      if (!is.fail ())
+      {
+        if (s == "not_deferrable" || s == "NOT DEFERRABLE")
+          v = deferrable::not_deferrable;
+        else if (s == "immediate" || s == "IMMEDIATE")
+          v = deferrable::immediate;
+        else if (s == "deferred" || s == "DEFERRED")
+          v = deferrable::deferred;
+        else
+          is.setstate (istream::failbit);
+      }
+
+      return is;
+    }
+  }
+}