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// file : odb/common.hxx
// author : Boris Kolpackov <boris@codesynthesis.com>
// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
// license : GNU GPL v3; see accompanying LICENSE file
#ifndef ODB_COMMON_HXX
#define ODB_COMMON_HXX
#include <string>
#include <cstddef> // std::size_t
#include <odb/context.hxx>
// Traverse object members recursively by going into composite members.
//
struct object_members_base: traversal::class_, virtual context
{
virtual void
simple (semantics::data_member&);
virtual void
container (semantics::data_member&);
// If you override this function, you can call the base to traverse
// bases and members. The first argument is the data member and can
// be NULL if we are traversing the root type or a base. The second
// argument is the actual composite type, which is not necessarily
// the same as m.type ().
//
virtual void
composite (semantics::data_member*, semantics::class_&);
// If you override this function, you can call the base to traverse
// bases and members.
//
virtual void
object (semantics::class_&);
public:
object_members_base ()
: member_ (*this)
{
init (false, false);
}
object_members_base (bool build_prefix, bool build_table_prefix)
: member_ (*this)
{
init (build_prefix, build_table_prefix);
}
object_members_base (object_members_base const& x)
: context (), //@@ -Wextra
member_ (*this)
{
init (x.build_prefix_, x.build_table_prefix_);
}
virtual void
traverse (semantics::class_&);
virtual void
traverse_composite (semantics::data_member&, semantics::class_&);
protected:
std::string prefix_;
context::table_prefix table_prefix_;
private:
void
init (bool build_prefix, bool build_table_prefix)
{
build_prefix_ = build_prefix;
build_table_prefix_ = build_table_prefix;
*this >> names_ >> member_;
*this >> inherits_ >> *this;
}
private:
struct member: traversal::data_member
{
member (object_members_base& om)
: om_ (om)
{
}
virtual void
traverse (semantics::data_member&);
public:
object_members_base& om_;
};
bool build_prefix_;
bool build_table_prefix_;
member member_;
traversal::names names_;
traversal::inherits inherits_;
};
// Traverse object columns recursively by going into composite members
// and bases.
//
struct object_columns_base: traversal::class_, virtual context
{
// Returning false means that the column has been ignored and the
// first flag should not be changed.
//
virtual bool
column (semantics::data_member&, std::string const& name, bool first) = 0;
// If you override this function, you can call the base to traverse
// bases and members. The first argument is the data member and can
// be NULL if we are traversing the root type or a base. The second
// argument is the actual composite type, which is not necessarily
// the same as m.type ().
//
virtual void
composite (semantics::data_member*, semantics::class_&);
// If you override this function, you can call the base to traverse
// bases and members.
//
virtual void
object (semantics::class_&);
// Called after the last column, provided at least one column hasn't
// been ignored.
//
virtual void
flush ();
public:
object_columns_base ()
: top_level_ (true), member_ (*this)
{
init ();
}
object_columns_base (object_columns_base const&)
: context (), //@@ -Wextra
top_level_ (true),
member_ (*this)
{
init ();
}
virtual void
traverse (semantics::class_&);
virtual void
traverse_composite (semantics::data_member&,
semantics::class_&,
std::string const& key_prefix,
std::string const& default_name);
private:
void
init ()
{
*this >> names_ >> member_;
*this >> inherits_ >> *this;
}
private:
struct member: traversal::data_member, context
{
member (object_columns_base& oc)
: oc_ (oc), first_ (true)
{
}
virtual void
traverse (semantics::data_member&);
public:
object_columns_base& oc_;
string prefix_;
bool first_;
};
bool top_level_;
member member_;
traversal::names names_;
traversal::inherits inherits_;
};
#endif // ODB_COMMON_HXX
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