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+// file      : odb/relational/mssql/context.hxx
+// author    : Constantin Michael <constantin@codesynthesis.com>
+// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+// license   : GNU GPL v3; see accompanying LICENSE file
+
+#ifndef ODB_RELATIONAL_MSSQL_CONTEXT_HXX
+#define ODB_RELATIONAL_MSSQL_CONTEXT_HXX
+
+#include <odb/relational/context.hxx>
+
+namespace relational
+{
+  namespace mssql
+  {
+    struct sql_type
+    {
+      // Keep the order in each block of types.
+      //
+      enum core_type
+      {
+        // Integral types.
+        //
+        BIT,
+        TINYINT,
+        SMALLINT,
+        INT,
+        BIGINT,
+
+        // Fixed and floating point types.
+        //
+        DECIMAL,
+        SMALLMONEY,
+        MONEY,
+        FLOAT,
+
+        // String and binary types.
+        //
+        CHAR,
+        VARCHAR,
+        TEXT,
+
+        NCHAR,
+        NVARCHAR,
+        NTEXT,
+
+        BINARY,
+        VARBINARY,
+        IMAGE,
+
+        // Date-time types.
+        //
+        DATE,
+        TIME,
+        DATETIME,
+        DATETIME2,
+        SMALLDATETIME,
+        DATETIMEOFFSET,
+
+        // Other types.
+        //
+        UNIQUEIDENTIFIER,
+        ROWVERSION,
+
+        // Invalid type.
+        //
+        invalid
+      };
+
+      sql_type () :
+          type (invalid), has_prec (false), has_scale (false)
+      {
+      }
+
+      core_type type;
+
+      bool has_prec;
+      unsigned short prec;  // Max numeric value is 8000. 0 indicates
+                            // 'max' as in VARCHAR(max).
+      bool has_scale;
+      unsigned short scale; // Max value is 38.
+    };
+
+    class context: public virtual relational::context
+    {
+    public:
+      sql_type const&
+      column_sql_type (semantics::data_member&,
+                       string const& key_prefix = string ());
+
+    public:
+      struct invalid_sql_type
+      {
+        invalid_sql_type (string const& message): message_ (message) {}
+
+        string const&
+        message () const {return message_;}
+
+      private:
+        string message_;
+      };
+
+      static sql_type
+      parse_sql_type (string const&);
+
+    protected:
+      virtual string
+      quote_id_impl (string const&) const;
+
+    protected:
+      virtual string
+      database_type_impl (semantics::type&, semantics::names*, bool);
+
+    public:
+      virtual
+      ~context ();
+
+      context ();
+      context (std::ostream&,
+               semantics::unit&,
+               options_type const&,
+               sema_rel::model*);
+
+      static context&
+      current ()
+      {
+        return *current_;
+      }
+
+    private:
+      static context* current_;
+
+    private:
+      struct data: base_context::data
+      {
+        data (std::ostream& os): base_context::data (os) {}
+      };
+      data* data_;
+    };
+  }
+}
+
+#endif // ODB_RELATIONAL_MSSQL_CONTEXT_HXX