MRResizeNoInit.h

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#pragma once
 
#include "MRMeshFwd.h"
#include "MRMacros.h"
#include <concepts>
 
namespace MR
{
 
template <typename T>
void resizeNoInit( std::vector<T> & vec, size_t targetSize ) MR_REQUIRES_IF_SUPPORTED( sizeof( T ) > 0 && std::constructible_from<T, NoInit> )
{
    // allocate enough memory
    vec.reserve( targetSize );
    // resize without memory access
    while ( vec.size() < targetSize )
        vec.emplace_back( noInit );
    // in case initial size was larger
    vec.resize( targetSize );
}
 
} //namespace MR