TraceableSize.h

// Copyright 2024, UChicago Argonne, LLC
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// Software Name: NEML2 -- the New Engineering material Model Library, version 2
// By: Argonne National Laboratory
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#pragma once
 
#include <variant>
#include <ATen/core/Tensor.h>
#include "neml2/misc/types.h"
 
namespace neml2
{
class Scalar;

struct TraceableSize : public std::variant<Size, ATensor>
{
  using std::variant<Size, ATensor>::variant;

  const ATensor * traceable() const noexcept;

  Size concrete() const;

  ATensor as_tensor() const;

  Scalar as_scalar() const;
};

TraceableSize operator*(const TraceableSize & lhs, const TraceableSize & rhs);

bool operator==(const TraceableSize & lhs, const TraceableSize & rhs);
bool operator!=(const TraceableSize & lhs, const TraceableSize & rhs);

std::ostream & operator<<(std::ostream & os, const TraceableSize & s);
} // namespace neml2