Version 2.2.0

[Kim-J-Smith]

🔧 Fixed Bugs

• operator* now returns a noexcept function pointer when the stored signature includes noexcept, instead of returning nullptr. (Remove safe_fn, refactor fn/unique_fn, and add classic_fn. #117)

⚠️ Breaking Changes

• ebd::fn and ebd::unique_fn now call std::terminate() on empty call instead of throwing std::bad_function_call. If you need std::bad_function_call on empty call, use the new ebd::classic_fn. (Remove safe_fn, refactor fn/unique_fn, and add classic_fn. #117)
• make_fn now preserves the noexcept qualifier when deducing signatures for lambdas and functors (it was previously stripped for ebd::fn/ebd::unique_fn). For example, make_fn([]() noexcept {}) now yields fn<void() const noexcept> instead of fn<void() const> (Since C++17). (Remove safe_fn, refactor fn/unique_fn, and add classic_fn. #117)
• ebd::safe_fn is deprecated. Use ebd::fn for terminate-on-empty, or ebd::basic_fn directly if you need the AssertObjectNoThrow guarantee. (Remove safe_fn, refactor fn/unique_fn, and add classic_fn. #117)
• The macro EMBED_FN_CONFIG_USE_BIG_DEFAULT_BUFFER has been removed. (V2.2.0/dev/no experimental code #116)
• If the user creates the fn_ref object from nullptr in the debugging mode, then regardless of whether the user has defined the macro EMBED_FN_HOOK_DEBUG or not, the std::terminate() function will be called. (Update documents and add a test for self assignment. #121)
• The ebd::fn_ref CTAD deduction guides for std::constant_wrapper (C++26) have been removed. Use ebd::make_fn(std::cw<...>) instead. (feat: support make_fn(std::cw<>). #124)

✨ New Features

• Added ebd::classic_fn, a copyable wrapper that throws std::bad_function_call on empty call (like std::function). (Remove safe_fn, refactor fn/unique_fn, and add classic_fn. #117)
• Added a make_fn overload for noexcept function pointers (C++17+), which preserves the noexcept qualifier in the wrapper's signature. (Remove safe_fn, refactor fn/unique_fn, and add classic_fn. #117)
• noexcept qualifiers are now propagated through make_fn for member function pointers and member object pointers. (Remove safe_fn, refactor fn/unique_fn, and add classic_fn. #117)
• make_fn<FnWrapper> now accepts multiple arguments, enabling in-place construction with a specific wrapper type, e.g. make_fn<ebd::classic_fn>(std::in_place_type<Functor>, args...). (Support multiple parameters in make_fn<Wrapper>. #123)
• Added make_fn overloads for std::constant_wrapper (C++26+), which deduce and return an ebd::fn_ref from std::cw<fn> or std::cw<member_fn> + object. (feat: support make_fn(std::cw<>). #124)

🛠️ Optimizations and Improvements

• Refactored noexcept propagation: replaced the complex noexcept_qualify_like trait with a simpler get_correct_signature trait that decides based on wrapper config (IsView || !IsThrowing). (Merge dev-branch into trunk. #120)
• Removed sig_with_noexcept from get_unique_signature; type now directly includes noexcept when applicable. (Remove safe_fn, refactor fn/unique_fn, and add classic_fn. #117)
• Removed outdated @todo and @experimental comments. (V2.2.0/dev/no experimental code #116)

📌 Notes

• v2.1.11 planned to remove ebd::fn_view and ebd::safe_fn in v2.2.0. Instead of removal, both are kept as deprecated aliases (see the Breaking Changes section above) to avoid breaking existing code.

[Kim-J-Smith]

Note to self: Deprecating function in C++29.

[Kim-J-Smith]

LGTM

[Kim-J-Smith]

Ratio (compile / baseline): 47.0744 (The reference value is 45 ~ 55)

• That's OK.

StdOperatorWrapper.FunctionWrapperAsParams:

Name (* = baseline)	Dim	Total ms	ns/op	Baseline	Ops/second
std::function *	1000000	9.651	9	-	103617354.4
fu2::function	1000000	17.713	17	1.835	56455194.2
ebd::fn	1000000	3.722	3	0.386	268658897.8
fu2::function_view	1000000	3.414	3	0.354	292870878.5
ebd::fn_ref	1000000	3.432	3	0.356	291403820.4

• That's OK.