C++ Tip of The Week

---

Your weekly dose of modern C++ challenge (Release every Sunday).

• https://tip-of-the-week.github.io/cpp

• How to contribute/add a solution?

  • Contributions are always very much appreciated. Just create a Pull Request with your solution.

---

Tips

• [345] - Did you know that C++26 allows constexpr cast from void*?
• [344] - Did you know that C++26 added Member visit?
• [343] - Did you know that C++26 std.format added formatting pointers ability?
• [342] - Did you know that C++26 added 'A nice placeholder with no name'?
• [341] - Did you know that C++26 added user-generated static_assert messages?
• [340] - Did you know that C++26 added bind front and back to NTTP callables?
• [339] - Did you know that C++26 added `@, $, and `` to the basic character set?
• [338] - Did you know about C++20 std::next_permutation algorithm?
• [337] - Did you know that run-time dispatching over type-list can be implemented many different ways?
• [336] - Did you know about gnu::vector_size extension?
• [335] - Did you know that you can simplify boost.mp11 API with DSL?
• [334] - Did you know that C++23 added std::invoke_r?
• [333] - Did you know that C++20 added std::span?
• [332] - Did you know that in C++ you can generate jump tables at compile-time?
• [331] - Did you about C++17 std::index_sequence, std::make_index_sequence?
• [330] - Did you know that C++17 added std::pmr::polymorphic_allocator?
• [329] - Did you know that C++ allows to pass Pointer To Member Function via template parameter?
• [328] - Did you know that C++23 extended floating-point types?
• [327] - Did you know that C++17 added std::forward_as_tuple and std::make_from_tuple and what’s the differ
• [326] - Did you know that C++23 deprecated std::aligned_storage and std::aligned_union?
• [325] - Did you know about typename erasure technique (via Strong/Opaque Typedefs) in C++?
• [324] - Did you know about virtual inheritance in C++?
• [323] - Did you know that constexpr is strict about undefined behaviour (UB), object lifetime, etc?
• [322] - Did you know that C++23 added Monadic operations for std::expected?
• [321] - Did you know that C++23 added support for formatting ranges?
• [320] - Did you know about intrisincts to support SIMD (Single Instruction, Multiple Data) instructio
• [319] - Did you know that C++11 allows calling functions with reference-to-array parameters from an initialize
• [318] - Did you know that std::unique_ptr can be constexpr in C++23?
• [317] - Did you know that with C++20 you can pass concepts?
• [316] - Did you know about std::rank/std::rank_v type_trait to get the rank of the array?
• [315] - Did you know about C++20 is_layout_compatible_v type_traits?
• [314] - Did you know that with gnu:C++26 a more parts of static reflection can be emulated?
• [313] - Did you know that C++26 added #embed?
• [312] - Did you know that C++20 added support for Unevaluated asm-declaration in constexpr functions?
• [311] - Did you know DRY (Don’t Repeat Yourself) comparisons pattern?
• [310] - Did you know that C+23 permitts static constexpr variables in constexpr functions?
• [309] - Did you know that C++20 added support for constexpr std::vector?
• [308] - Did you know that the layout of struct fields will affect its size/alignment?
• [307] - Did you know that C++23 added static operator[]?
• [306] - Did you know about if/else hell anti-pattern?
• [305] - Did you know about (rejected) proposal for homogeneous variadic function parameters?
• [304] - Did you know that tuple can be implement just with lambdas?
• [303] - Did you know about typename erasure technique to reduce compilation times with templates?
• [302] - Did you know that with concepts you can override a type?
• [301] - Did you know that functions in are constexpr since C++23?
• [300] - Did you know that C++23 added support for constexpr std::bitset?
• [299] - Did you know that C++20 concepts can be used to avoid implicit conversions?
• [298] - Did you know that C++23 added static operator()?
• [297] - Did you know that C++20 introduced coroutines? (co_await)
• [296] - Did you know that C++20 introduced coroutines? (co_yield)
• [295] - Did you know that C++23 added stacktrace library?
• [294] - Did you know that with C++20 (constexpr containers) TMP can be achieved with STL?
• [293] - Did you know that C++17 [[nodiscard]] attribute can be applied not only to function?
• [292] - Did you know about memoized for less types (more compile-time friendly) conditional_t?
• [291] - Did you know about [[gnu::cold]] function attribute to mark functions which are unlikely to be called?
• [290] - Did you know that lambda expression is guaranteed to have a unique type?
• [289] - Did you know that [[assume]] attribute has been accepted to C++23?
• [288] - Did you know you can pass an array by reference?
• [287] - Did you know that C++23 added auto(x): decay-copy in the language?
• [286] - Did you know that Circle supports Python's extended slice syntax for variadic packs?
• [285] - Did you know about C++20 template specialization with concepts?
• [284] - Did you know about C++23 ispanstream - A strstream replacement using span as buffer?
• [283] - Did you know that C++23 added ranges::to (conversion from ranges to containers)?
• [282] - Did you know about introduced in C++20 object concepts?
• [281] - Did you know about gtest.gmock mocking framework?
• [280] - Did you know about use cases for type-based reserved decorator?
• [279] - Did you know that C++20 made std::string constexpr?
• [278] - Did you know that C++23 added Literal Suffix for (signed) size_t?
• [277] - Did you know that C++17 structured bindings support to custom classes can be added?
• [276] - Did you know that C++23 added bind_back to simplify writing higher order functions?
• [275] - Did you know what is the underlying type of NTTP string aka fixed_string?
• [274] - Did you know about C++23 proposal Structured Bindings can introduce a Pack?
• [273] - Did you know that concept can be passed via lambda expression?
• [272] - Did you know that C++20 added std::ranges::{all_of, any_of, none_of} algorithms?
• [271] - Did you know that C++20 added support for floating point values as non-type template parameters
• [270] - Did you know that C++23 added std::to_underlying?
• [269] - Did you know about boost::mp11::mp_with_index?
• [268] - Did you know that C++20 added std::erase_if for std::map and std::vector?
• [267] - Did you know that C++23 added std::unreachable?
• [266] - Did you know wrapping an unqualified function name in parentheses suppresses argument-d
• [265] - Did you know that C++23 added Attributes on Lambda-Expressions?
• [264] - Did you know that C++20 added __VA_OPT__ for comma omission and comma deletion?
• [263] - Did you know that C++23 added std::byteswap to swap bytes?
• [262] - Did you know that type_info equality operator is constexpr in C++23?
• [261] - Did you know that C++23 added Monadic operations for std::optional?
• [260] - Did you know that C++23 added std::move_only_function?
• [259] - Did you know that static reflection supports introspecting constructors?
• [258] - Did you know that static reflection can be used to invoke functions with named parameters?
• [257] - Did you know that static reflection can be used to implement row polymorphism?
• [256] - Did you know that static reflection proposal for C++2X has mirror/value based interface?
• [255] - Did you know that static reflection proposal for C++2X can reflect functions?
• [254] - Did you know about static reflection proposal for C++2X?
• [253] - Did you know that C++20 extends support for data time utilities?
• [252] - Did you know that C++23 added basic_string::resize_and_overwrite?
• [251] - Did you know that C++20 added type_identity which implements the identity metafunction?
• [250] - Did you know about methods to access the last element of variadic pack...?
• [249] - Did you know that C++23 allows extended init-statement with alias-declaration in the for loop?
• [248] - Did you know that CRTP can be implemented with C++23 Deducing this?
• [247] - Did you know that Deducing this proposal has been voted out into C++23?
• [246] - Did you know that C++11 added a numeric literal operator template?
• [245] - Did you know about C++2X proposal to add Multidimensional subscript operator?
• [244] - Did you know about compiler predefined macros assosicated with the compilation date/time?
• [243] - Did you know about C++2X Pattern matching using is and as proposal?
• [242] - Did you know that ANSI/ISO C++ conforming programs must not rely on a maximum template depth greater th
• [241] - Did you know about different ways of accessing C-style arrays by index?
• [240] - Did you know that using-declarator can be used to manipulate the overload set?
• [239] - Did you know that Circle Meta-model allows to convert string to a type?
• [238] - Did you know that Circle Meta-model allows for applying normal STL for operations on @meta types?
• [237] - Did you know about C++2X proposal for the Circle Meta-model for compilation-time meta-progr
• [236] - Did you know about __builtin_dump_struct clang-extension which can nicely print a struct?
• [235] - Did you know that C++20 [[no_unique_address]] can be used to implement lazy/fast/memory efficient
• [234] - Did you know about function-try-block and that exceptions caught inside that block are implicitly
• [233] - Did you know that C++20 made typename more optional?
• [232] - Did you know that different overloads can have different specifiers?
• [231] - Did you know about C++17 variadic using declaration?
• [230] - Did you know that C++23 added if consteval?
• [229] - Did you know about python's named tuples?
• [228] - Did you know that C++ allows accessing private members with friend injection?
• [227] - Did you know that std::variant become valueless by exception?
• [226] - Did you know about C++23 feature which adds support for inheriting from std::variant?
• [225] - Did you know about C++23 feature which removes unnecessary ()’s from C++ lambdas?
• [224] - Did you know that the JSON standard does not specify that the insertion order of object elements s
• [223] - Did you know about the proposal to add json support to the standard library?
• [222] - Did you know that C++23 added contains function to string_view?
• [221] - Did you know that with Automatic DI production wiring can be overwritten for integration testing?
• [220] - Did you know that with Automatic DI one can control how dependencies are being created?
• [219] - Did you know about Automatic Dependency Injection libraries such as DI?
• [218] - Did you know about different ways of constructor Dependency Injection?
• [217] - Did you know the difference between fakes, stubs, mocks?
• [216] - Did you know that you can inject singletons to improve testability?
• [215] - Did you know C++2X Pattern Matching can be used for run-time dispatching?
• [214] - Did you know about variadic aggregate initialization?
• [213] - Did you know that mapping types to values is a simple way to transition from compile-time to run-time s
• [212] - Did you know that lambdas are const by default but can be mutable and keep state?
• [211] - Did you know about C++2X Pattern Matching proposal?
• [210] - Did you know about Design By Introspection?
• [209] - Did you know about Policy Based Design?
• [208] - Did you know that default template arguments can be explored with template template arguments?
• [207] - Did you know about the proposal to add constexpr function parameters?
• [206] - Did you know about proposal to add support for recursive lambdas?
• [205] - Did you know that C++20 std::to_array supports creating from string literals?
• [204] - Did you know that you can implement a compile-time map with C++?
• [203] - Did you know that in C++ char, signed char and unsigned char are 3 different types?
• [202] - Did you know that C++20 added Using Enum which introduces the enumerator names of the named enumeratio
• [201] - Did you know that sizeof operator can be used for efficient math computation?
• [200] - Did you know that C++23 added is_scoped_enum type trait to detect whether an enum is scoped?
• [199] - Did you know about proposal to introduce constexpr ternary operator?
• [198] - Did you know about different ways of iterating over objects?
• [197] - Did you know that Lambdas in Unevaluated Context combined with Template Constraints (Concepts) can be use
• [196] - Did you know that Lambdas in Unevaluated Context combined with Immediately Invoked Function Expression
• [195] - Did you know that C++20 added support for [[no_unique_address]] attribute?
• [194] - Did you know about C++23 proposal to add views::enumerate?
• [193] - Did you know that C++20 added support for constexpr new?
• [192] - Did you know about std::expected proposal for error handling?
• [191] - Did you know that expression evaluation order is not specified?
• [190] - Did you know that C++20 added ostream_joiner that writes successive objects into the basic_ostr
• [189] - Did you know that Compile Time Regular Expressions support extracting matches?
• [188] - Did you know about proposal to add Compile Time Regular Expressions?
• [187] - Did you know that C++17 made exception specifications be part of the type system?
• [186] - Did you know Non-Type Template Parameters (NTTP) with User-Defined Literals (UDL) can be used to get com
• [185] - Did you know about the proposal to make printf compile-time safe and with named arguments?
• [184] - Did you know that you can customize formatter for your classes with std::format?
• [183] - Did you know that Formatted output has been accepted into C++20?
• [182] - Did you know about the proposal to add Non-terminal variadic template parameters?
• ...

---

Disclaimer This repo orignates from https://quantlabfinancial.github.io/cpp_tip_of_the_week