cpp_tip_of_the_week: A repository from schaumb

C++ Tip of The Week

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

How to contribute/add a solution?
- Contributions are always very much appreciated. Just create a Pull Request with your solution.

Tips

[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-dependent lookup?
[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 than 17 (changed to 1024 in C++11)?
[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-programming?
[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 views?
[234] - Did you know about function-try-block and that exceptions caught inside that block are implicitly rethrown?
[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 should be preserved?
[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 space?
[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 enumeration as if by a using-declaration for each enumerator?
[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 used with types?
[196] - Did you know that Lambdas in Unevaluated Context combined with Immediately Invoked Function Expressions (IIEF) can be used to simplify Template Meta-Programming?
[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_ostream separated by a delimiter?
[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 compile-time strings?
[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?

Did you know about C++20 make_unique_for_overwrite?
Did you know aboutproposal to allow floating-points as non-typetemplate parameters (NTTP)?
Did you know about std::rank/std::rank_v type_trait to get the rank?
Did you know that C++20 added std::destroying_delete?
Did you know about C++ allows to pass Pointer To Member Function?
Did you know that C++20 added Class Types in Non-Type Template
Did you that C++ introduced std::to_address (Utility to convert a
Did you that you about proposal to make std::type_info constexpr?
Did you that you that C++20 added ranges?
Did you know that Ranges will be added to C++20 as an STL improvement?
Did you that you that C++20 added functions for safe integral
Did you that you boost::mp11 allows meta-functions to be used with
Did you that you C++ concepts can be used to constraint functions
Did you that you can create anonymous structs with different types in
Did you know that C++17 added std::forward_as_tuple?
Did you know that C++20 added std::is_corresponding_member?
Did you know that C++20 added shift_left, shift_right algorithms?
Did you know that C++20 added concepts library?
Did you know that C++20 added jthread which can be interrupted?
Did you know about C++23 proposal for a type trait to detectection?
Did you know about C++2a proposal - Universal Template Parameters (UTP) which would allow to unify TMP with types and values?
Did you know that C++20 added Class Types in Non-Type Template Parameters
Did you know that about GNU extension – Statement Expressions – available
Did you know that with C++2a getting an enum name in a standard/compatible
Did you know that C++20 extended make_shared to support arrays?
Did you know that C++17 fold expressions might be applied to make
Did you know that C++20 added span view over contiguous containers?
Did you know that C++20 added Three-way comparison (aka spaceship
Did you know that C++20 added Class Types in Non-Type Template
Did you know that C++20 added std::bit_cast?
Did you know that C++20 added std::to_array?
Did you know about std::embed proposal for C++23?
Did you know that C++20 modules have support for private sections?
Did you know that C++20 added type_traits to verify whether array is
Did you know that C++20 made std::for_each constexpr?
Did you know that order of fields in tuple/struct may impact the sizeof
Did you know that C++17 added Class Template Class Deduction (C++20
Did you know that C++20’s added bind_front to simplify writing higher
Did you know that C++20’s requires expression (added by concepts) can be
Did you know that C++20 added Integral power-of-2 operations in
Did you know that C++20 added String Prefix and Suffix Checking?
Did you know that C++20 adopted source location to access
Did you know that with C++11 auto trailing return type Substitution
Did you know that with C++17 class template argument deduction can be
Did you know that C++20 added support for allowing pack expansion in
Did you know that expansion statements (also known as for... and/or
Did you know that C++20 is going to add text formatting library (based
Did you know that with C++20 you can capture reference of structured
Did you know that you can ensure that NON-constexpr evaluation by simply
Did you know that with C++ you create a compile-time unique string type
Did you know that with C++ you can reflect on type name using nonstandard PRETTY_FUNCTION extensions (should be possible with source.location
Did you know that C++20 unified template<class…> class and
Did you know that with C++20 and lambdas in unevaluated context you can
Did you know that C++17 added std::invoke?
Did you know that C++20 added template-parameter-list for generic
Did you know that you can overload on derived types?
Did you know that with modern C++ it’s possible to implement well
Did you that C++20 unfortunately won’t have function traits?
Did you know that template template types can be used for type traits?
Did you know that C++20 won’t have a packed attribute which, if applied,
Did you know that C++20 unfortunately won’t have static reflection?
Did you know that C++20 added support for a new type_trait
Did you know that C++20 will allow Virtual Function Calls in Constant
Did you know that C++20 will add [[no_unique_address]] attribute?
Did you know that C++20 will add support for checking whether a call
Did you know that C++20 will add support for ‘Familiar template syntax
Did you know that C++20 will add support for ‘Class Types in Non-Type
Did you know that with DI you can write your own extensions?
Did you know that with DI you can restrict types which can be injected?
Did you know that dependency injection in C++ can be automated?
Did you know you can implement named parameters using modern C++?
Did you know that with modern C++ you can make TMP almost without <>?
Did you know about Boost.MP11 library for Template Meta-Programming
Did you know that Ranges will be added to C++20 as an STL improvement?
Did you know Boost.Hana library (Your standard library for
Did you know that C++17 added support for auto with templates (non-type template parameters)?
Did you know that C++17 added support for constexpr if?
Did you know that constexpr if can help with suppor(ng diﬀerent API’s?
Did you know that C++17 added init-statements for if and switch?
Did you know that C++17 added support for fold expressions?
Did you know that C++17 introduced Parallel STL? (Another reason not to write raw loops?)
Did you know about trigraphs? Don’t worry if you didn’t because from C++17 trapgrahs are DEPRACTED
Did you know that C++17 introduced a few new general ajributes and that one of them is [[nodiscard]]?
Did you know that C++17 added [[maybe_unused]] general ajribute?
Did you know that C++17 introduced [[fallthrough]] ajribute? It indicates that the fall through from the
Did you know that excep(on speciﬁca(ons is part of the type system since C++17?
Did you know about new C++17 SFINAE helpers: std::is_detected and std::void_t?
Did you know that it’s possible to use SFINAE in order to detect whether a func(on is constexpr?
Did you know that pseudo-random numbers might be generated at compile (me?
Did you know that you can verify whether a template is instan(ated within the transla(on unit?
Did you know that C++17 added support for auto with templates (non-type template
Did you know that C++17 added support for constexpr if?
Did you know that constexpr if can help with supporBng diﬀerent API’s?
Did you know that C++17 added init-statements for if and switch?
Did you know that C++17 added support for fold expressions?
Did you know that C++17 introduced Parallel STL? (Another reason not to write raw loops?)
Did you know about trigraphs? Don’t worry if you didn’t because from C++17 trapgrahs are
Did you know that C++17 introduced a few new general a6ributes and that one of them is
Did you know that C++17 added [[maybe_unused]] general a6ribute?
Did you know that C++17 introduced [[fallthrough]] a6ribute? It indicates that the fall
Did you know that exception specification is part of the type system since C++17?
Did you know about new C++17 SFINAE helpers: std::is_detected and std::void_t?
Did you know that it’s possible to use SFINAE in order to detect whether a function is
Did you know that pseudo-random numbers might be generated at compile Bme?
Did you know that you can verify whether a template is instanBated within the
Did you know that C++17 added support for auto with templates (non-type template
Did you know that C++17 added support for constexpr if?
Did you know that constexpr if can help with supporBng diﬀerent API’s?
Did you know that C++17 added init-statements for if and switch?
Did you know that C++17 added support for fold expressions?
Did you know that C++17 introduced Parallel STL? (Another reason not to write raw loops?)
Did you know about trigraphs? Don’t worry if you didn’t because from C++17 trapgrahs are
Did you know that C++17 introduced a few new general a6ributes and that one of them is
Did you know that C++17 added [[maybe_unused]] general a6ribute?
Did you know that C++17 introduced [[fallthrough]] a6ribute? It indicates that the fall
Did you know about new C++17 SFINAE helpers: std::is_detected and std::void_t?
Did you know that it’s possible to use SFINAE in order to detect whether a funcBon is
Did you know that pseudo-random numbers might be generated at compile Bme?
Did you know that you can verify whether a template is instanBated within the
Did you know that C++17 added support for auto with templates (non-type template
Did you know that C++17 added support for constexpr if?
Did you know that constexpr if can help with supporort for different API’s?
Did you know that C++17 added init-statements for if and switch?
Did you know that C++17 added support for fold expressions?
Did you know that C++17 introduced Parallel STL? (Another reason not to write raw loops?)
Did you know about trigraphs? Don’t worry if you didn’t because from C++17 trapgrahs are
Did you know that C++17 introduced a few new general a6ributes and that one of them is
Did you know that C++17 added [[maybe_unused]] general a6ribute?
Did you know that C++17 introduced [[fallthrough]] a6ribute? It indicates that the fall
Did you know that excepBon speciﬁcaBons is part of the type system since C++17?
Did you know about new C++17 SFINAE helpers: std::is_detected and std::void_t?
Did you know that it’s possible to use SFINAE in order to detect whether a funcBon is
Did you know that pseudo-random numbers might be generated at compile Bme?
Did you know that you can verify whether a template is instanBated within the
Did you know Boost.Hana library (Your standard library for
Did you know that UML state machine standard offers more than just
Did you know that with modern C++ allows to implement declarative, zero
Did you know that variadic templates expansion is ‘greedy’?
Did you know about generic overload func(on (std::overload)?
Did you know about generic overload function (std::overload)?
Did you know that with variadic templates creating a list of types is
Did you know that about a powerful combination of std::is_base_of and
Did you know about restricted template expansion (aka stateless TMP)?
Did you know that C++20 introduced coroutines?
Did you know that C++17 introduced std::any?
Did you know that C++17 introduced structured bindings?
Did you know that C++17 introduced std::invoke which allows call any
Did you know that concepts checking might be combined with fold
Did you know that concepts (type requirements checking) were added to
Did you know that modern C++ allows to easily implement type erased
Did you know that C++17 introduce std::variant?
Did you know that a caught exception might be rethrown using throw
Did you know how type_traits are implemented in C++?
Did you about new utilities added in C++17 -> std::index_sequence?
Did you know that with SFINAE it can be detected whether a function can
Did you know that func(on parameters can’t be constexpr?
Did you know that function parameters can’t be constexpr?
Did you know that C++11 introduced alignof operator which queries
Did you know that C++17 introduced is_aggregate trait which checks whether a
Did you know that C++11 introduced user deﬁned literals?
Did you know that C++17 added std::apply which invokes the callable object f with a tuple of
Did you know that C++17 added is_detected trait to simplify type introspection?
Did you know that C++17 added new type traits to the type_traits header?
Did you know that you can easily implement a run-time dispatching with modern C++?
Did you know that you can get a type name at compile-time (no RTTI)?

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schaumb/cpp_tip_of_the_week

C++ Tip of The Week

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