Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//===========================================================================//
#pragma once
#include <tuple>
#include <string>
#include <sstream>
template <class Object, class RecordType>
class InstanceLogger
{
public:
typedef RecordType RecordType_t;
protected:
void InstanceLog( const char* pMsg )
{
m_records.AddToTail( BuildRecord( pMsg ) );
}
void DumpInstanceLog( )
{
CUtlString str;
Msg( "--------\nDumping instance log for 0x%08p\n", this );
for ( auto it : m_records )
{
FormatRecord( &str, it );
Msg( "%s\n", str.Get() );
}
Msg( "========\nInstance log complete for 0x%08p\n", this );
}
virtual RecordType_t BuildRecord( const char* pMsg ) = 0;
private:
CUtlVector< RecordType > m_records;
};
// // Your class needs to implement something like this. You don't have to use a tuple,
// // but if you don't you also need to implement FormatRecord for your type.
// RecordType BuildRecord( const char* pMsg )
// {
// return std::make_tuple( this, pMsg, g_FrameNum, Plat_FloatTime(), m_nAllocatedWidth, m_nAllocatedHeight, m_nAllocatedDepth, m_nTargetResidence, m_nCurrentResidence );
// }
// helper function to print a tuple of any size
template<class Tuple, std::size_t N>
struct TuplePrinter {
static void print( std::stringstream& os, const Tuple& t )
{
TuplePrinter<Tuple, N - 1>::print( os, t );
os << ", " << std::get<N - 1>( t );
}
};
template<class Tuple>
struct TuplePrinter < Tuple, 1 > {
static void print( std::stringstream& os, const Tuple& t )
{
os << std::get<0>( t );
}
};
template<class... Args>
void format( std::stringstream& os, const std::tuple<Args...>& t )
{
os << "( ";
TuplePrinter<decltype( t ), sizeof...( Args )>::print( os, t );
os << " )";
}
// end helper function
template <class RecordType>
void FormatRecord( CUtlString *pOutStr, const RecordType& rt )
{
std::stringstream stream;
format( stream, rt );
( *pOutStr ) = stream.str().c_str();
}