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Add saturating arithmetic, and move to policy based operations #3

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Merged
mborland merged 12 commits into from
Feb 3, 2026
Merged

Add saturating arithmetic, and move to policy based operations #3

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887d029
Define overflow policy enum
mborland Feb 2, 2026
78d11cd
Use policy based design for reduced code duplication
mborland Feb 2, 2026
027789c
Re-order tests for debugger
mborland Feb 2, 2026
e5f22d4
Fix exception specification
mborland Feb 2, 2026
4f737c7
Define the mixed type functions
mborland Feb 2, 2026
fd6aa03
Define macro for unreachable
mborland Feb 2, 2026
fa2eb4e
Eliminate else branch of policy
mborland Feb 2, 2026
a73f624
Add testing of saturating subtraction
mborland Feb 2, 2026
1a489a0
Add mul_sat testing
mborland Feb 3, 2026
742a9b5
Fix unused lambda capture warning
mborland Feb 3, 2026
d15f069
Add div_sat testing
mborland Feb 3, 2026
c13b9aa
Fix missing header in Clang 21 with C++23 or higher
mborland Feb 3, 2026
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8 changes: 8 additions & 0 deletions include/boost/safe_numbers/detail/config.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -48,4 +48,12 @@

#endif

#if defined(__GNUC__) || defined(__clang__)
# define BOOST_SAFE_NUMBERS_UNREACHABLE __builtin_unreachable()
#elif defined(_MSC_VER)
# define BOOST_SAFE_NUMBERS_UNREACHABLE __assume(0)
#else
# define BOOST_SAFE_NUMBERS_UNREACHABLE std::abort()
#endif

#endif // BOOST_SAFENUMBERS_CONFIG_HPP
18 changes: 18 additions & 0 deletions include/boost/safe_numbers/detail/overflow_policy.hpp
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
// Copyright 2026 Matt Borland
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt

#ifndef BOOST_SAFE_NUMBERS_DETAIL_OVERFLOW_POLICY_HPP
#define BOOST_SAFE_NUMBERS_DETAIL_OVERFLOW_POLICY_HPP

namespace boost::safe_numbers::detail {

enum class overflow_policy
{
throw_exception,
saturate
};

} // namespace boost::safe_numbers::detail

#endif // BOOST_SAFE_NUMBERS_DETAIL_OVERFLOW_POLICY_HPP
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