Add support for custom database type mapping

New pragma qualifier, map, and specifiers: as, to, from. New tests:
<database>/custom.

1 files changed, 87 insertions, 0 deletions

diff --git a/pgsql/custom/test.hxx b/pgsql/custom/test.hxx
new file mode 100644
index 0000000..1f83031
--- /dev/null
+++ b/pgsql/custom/test.hxx
@@ -0,0 +1,87 @@
+// file      : pgsql/custom/test.hxx
+// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef TEST_HXX
+#define TEST_HXX
+
+#include <string>
+#include <vector>
+
+#include <odb/core.hxx>
+
+// Map POINT PostgreSQL type to the point C++ struct. The other half
+// of this mapping is in traits.hxx (value_traits<point, id_string>).
+//
+#pragma db map type("POINT") as("TEXT") to("(?)::POINT") from("(?)::TEXT")
+
+#pragma db value type("POINT")
+struct point
+{
+  point () {}
+  point (double x_, double y_): x (x_), y (y_) {}
+
+  double x;
+  double y;
+};
+
+inline bool
+operator== (const point& a, const point& b)
+{
+  return a.x == b.x && a.y == b.y;
+}
+
+// Map NUMERIC PostgreSQL type to std::string (or any other type that
+// provides the value_traits<?, id_string> specialization).
+//
+#pragma db map type("NUMERIC *(\\(.+\\))?") \
+               as("TEXT")                   \
+               to("(?)::NUMERIC$1")         \
+               from("(?)::TEXT")
+
+// Map INTEGER[] PostgreSQL type to std::vector<int>. The other half of
+// this mapping is in traits.hxx (value_traits<std::vector<int>, id_string>).
+//
+#pragma db map type("INTEGER *\\[(\\d+)\\]") \
+               as("TEXT")                    \
+               to("(?)::INTEGER[$1]")        \
+               from("(?)::TEXT")
+
+#pragma db object
+struct object
+{
+  object () {}
+  object (unsigned long id_) : id (id_) {}
+
+  #pragma db id
+  unsigned long id;
+
+  point p;
+  std::vector<point> pv;
+
+  #pragma db type("NUMERIC(6, 4)")
+  std::string n1;
+
+  #pragma db type("NUMERIC(6)")
+  std::string n2;
+
+  #pragma db type("NUMERIC")
+  std::string n3;
+
+  #pragma db type("INTEGER [123]")
+  std::vector<int> iv;
+
+  bool
+  operator== (const object& y) const
+  {
+    return id == y.id &&
+           p == y.p   &&
+           pv == y.pv &&
+           n1 == y.n1 &&
+           n2 == y.n2 &&
+           n3 == y.n3 &&
+           iv == y.iv;
+  }
+};
+
+#endif // TEST_HXX