__ __ _______..______ _______ _______ __ | | | | / || _ \ | ____|| ____|| | | | | | | (----`| |_) | | |__ | |__ | | | | | | \ \ | / | __| | __| | | | `--' | .----) | | |\ \----.| |____ | | | `----. \______/ |_______/ | _| `._____||_______||__| |_______| 
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Ubpa Static Reflection
Header-only, tiny (99 lines) and powerful C++20 static reflection library.
- header-only, tiny (99 lines) and powerful (USRefl_99.h (MSVC & GCC), USRefl_99_clang.h (Clang))
- noninvasive
- basic
- (non-static / static) member variable
- (non-static / static) member function
- attribute
- enum
- string <-> enumerator
- static dispatch
- template
- inheritance
- diamond inheritance
- iterate bases recursively
- virtual inheritance
- parser
run it online : compiler explorer
Suppose you need to reflect struct Vec
struct Vec { float x; float y; float norm() const { return std::sqrt(x*x + y*y); } };template<> struct Ubpa::USRefl::TypeInfo<Vec> : TypeInfoBase<Vec> { static constexpr AttrList attrs = {}; static constexpr FieldList fields = { Field {TSTR("x") , &Type::x }, Field {TSTR("y") , &Type::y }, Field {TSTR("norm"), &Type::norm}, }; };if you use 99-lines version, you need to add a line
static constexpr std::string_view name = "...";
TypeInfo<Vec>::fields.ForEach([](const auto& field) { std::cout << field.name << std::endl; });std::invoke(TypeInfo<Vec>::fields.Find(TSTR("y")).value, v) = 4.f; std::invoke(TypeInfo<Vec>::fields.Find(TSTR("x")).value, v) = 3.f; std::cout << "x: " << std::invoke(TypeInfo<Vec>::fields.Find(TSTR("x")).value, v) << std::endl;std::cout << "norm: " << std::invoke(TypeInfo<Vec>::fields.Find(TSTR("norm")).value, v) << std::endl;TypeInfo<Vec>::ForEachVarOf(v, [](const auto& field, const auto& var) { std::cout << field.name << ": " << var << std::endl; });- 99 line: USRefl_99.h, test, online (test all examples below)
- template
- static
- func
- enum
- inheritance
- virtual inheritance
- attribute name as type
- AutoRefl : app, example (Vec.h, Vec_AutoRefl.inl (generated by AutoRefl), main.cpp)
You can choose one of the following two methods
- ⭐ method 0: add the required file
- MSVC and GCC: USRefl_99.h
- Clang : USRefl_99_clang.h
- ⭐ method 1: cmake install, use
find package(USRefl REQUIRED)to get imported targetUbpa::USRefl_core
- Clang/LLVM >= 10
- GCC >= 10
- MSVC >= 1926 (not fully support virtual inheritance because of a MSVC bug)
You can copy and paste the license summary from below.
MIT License Copyright (c) 2020 Ubpa Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.