llvm/llvm/include/llvm/Support/Capacity.h

//===--- Capacity.h - Generic computation of ADT memory use -----*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines the capacity function that computes the amount of
// memory used by an ADT.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_SUPPORT_CAPACITY_H
#define LLVM_SUPPORT_CAPACITY_H

#include <cstddef>

namespace llvm {

template <typename T>
static inline size_t capacity_in_bytes(const T &x) { … }

} // end namespace llvm

#endif