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Fr4nz D13trich 2025-11-22 13:58:55 +01:00
parent 4af19165ec
commit 68073add76
12458 changed files with 12350765 additions and 2 deletions
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43
libs/base/checked_cast.hpp Normal file
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#pragma once
#include "base/assert.hpp"
#include <limits>
#include <type_traits>
namespace base
{
template <typename ReturnType, typename ParameterType>
ReturnType checked_cast(ParameterType v)
{
static_assert(std::is_integral_v<ParameterType>, "ParameterType should be integral");
static_assert(std::is_integral_v<ReturnType>, "ReturnType should be integral");
auto const result = static_cast<ReturnType>(v);
CHECK_EQUAL(static_cast<ParameterType>(result), v, ());
CHECK((result > 0) == (v > 0), ("checked_cast failed, value =", v, ", result =", result));
return result;
}
template <typename ReturnType, typename ParameterType>
ReturnType asserted_cast(ParameterType v)
{
static_assert(std::is_integral_v<ParameterType>, "ParameterType should be integral");
static_assert(std::is_integral_v<ReturnType>, "ReturnType should be integral");
auto const result = static_cast<ReturnType>(v);
ASSERT_EQUAL(static_cast<ParameterType>(result), v, ());
ASSERT((result > 0) == (v > 0), ("asserted_cast failed, value =", v, ", result =", result));
return result;
}
template <typename ResultType, typename ParameterType>
bool IsCastValid(ParameterType v)
{
static_assert(std::is_integral_v<ParameterType>, "ParameterType should be integral");
static_assert(std::is_integral_v<ResultType>, "ReturnType should be integral");
auto const result = static_cast<ResultType>(v);
return static_cast<ParameterType>(result) == v && ((result > 0) == (v > 0));
}
} // namespace base