Since When: the standard and first GCC, Clang and MSVC releases for each C++ feature, and guides that answer old C++ questions for today’s standards.https://cpp-next.comen-ushello@cpp-next.com (Miriam Castellanos)https://cpp-next.com/blog/can-a-cpp-destructor-throwhttps://cpp-next.com/blog/can-a-cpp-destructor-throwSince C++11 a throwing destructor calls std::terminate. What noexcept(false) changes, why containers forbid it, and how to report failure from close().Wed, 11 Nov 2026 00:00:00 GMTLanguagedestructorsexceptionsnoexceptraiicpp20https://cpp-next.com/blog/clang-vs-gcchttps://cpp-next.com/blog/clang-vs-gccClang vs GCC for C++: default standard, libstdc++ or libc++, C++26 features and warnings, each built on GCC 16.2 and Clang 23.1, then tools and which to pick.Wed, 11 Nov 2026 00:00:00 GMTToolingclanggccllvmcompilerscpp23https://cpp-next.com/blog/cpp-expression-templateshttps://cpp-next.com/blog/cpp-expression-templatesBuild a C++20 expression template that runs a + b + c in one loop with no temporaries, count what it removes, and see when Eigen or ranges fit better.Wed, 11 Nov 2026 00:00:00 GMTTemplatesexpression-templatestemplatesconceptsoperator-overloadingcpp20https://cpp-next.com/blog/cpp-generators-co-yield-and-std-generatorhttps://cpp-next.com/blog/cpp-generators-co-yield-and-std-generatorWrite a lazy sequence with co_yield: std::generator in C++23, a complete C++20 generator for libraries without it, and the lifetime rules that stop dangling.Wed, 11 Nov 2026 00:00:00 GMTConcurrencycoroutinesgeneratorsstd-generatorcpp23rangeshttps://cpp-next.com/blog/cpp-int-to-stringhttps://cpp-next.com/blog/cpp-int-to-stringConvert an int to a string in C++ with std::to_string, std::format or std::to_chars: the exact output of each, what allocates, and why itoa is not standard.Wed, 11 Nov 2026 00:00:00 GMTStandard Librarystd-to-stringstd-formatstd-to-charscpp17https://cpp-next.com/blog/cpp-string-as-template-parameterhttps://cpp-next.com/blog/cpp-string-as-template-parameterA string literal can’t be the argument of a pointer template parameter. How a C++20 fixed_string type fixes that, what came before, and what C++26 adds.Wed, 11 Nov 2026 00:00:00 GMTTemplatesnon-type-template-parametersfixed-stringcompile-time-stringscpp20https://cpp-next.com/blog/cpp-string-to-inthttps://cpp-next.com/blog/cpp-string-to-intConvert a string to int in C++ with std::stoi or std::from_chars, reject trailing text, and see what each call, atoi included, does with bad input.Wed, 11 Nov 2026 00:00:00 GMTStandard Librarystd-from-charsstd-stoistring-parsingcpp17https://cpp-next.com/blog/cpp-virtual-functionhttps://cpp-next.com/blog/cpp-virtual-functionHow a C++ virtual function call is resolved, why to write override and a virtual destructor, pure virtual functions, and which warnings catch the traps.Wed, 11 Nov 2026 00:00:00 GMTLanguagevirtual-functionspolymorphisminheritancecpp11https://cpp-next.com/blog/cpp-vs-chttps://cpp-next.com/blog/cpp-vs-cC++ vs C in compiled code: the valid C that four compilers reject as C++, how C23 moved toward C++, how extern “C” joins the two, and when to pick C.Wed, 11 Nov 2026 00:00:00 GMTCareersc-languagec23extern-ccpp23https://cpp-next.com/blog/cpp20-concepts-how-to-write-and-use-themhttps://cpp-next.com/blog/cpp20-concepts-how-to-write-and-use-themConstrain C++20 templates with concepts: the four ways to write a constraint, requires expressions, the standard concepts, overloading, and what is not checked.Wed, 11 Nov 2026 00:00:00 GMTStandardsconceptsconstraintstemplatescpp20sfinaehttps://cpp-next.com/blog/generic-lambdas-and-function-objectshttps://cpp-next.com/blog/generic-lambdas-and-function-objectsWrite generic lambdas with auto (C++14) and template parameter lists (C++20), and know when a function template or a named function object is the better tool.Wed, 11 Nov 2026 00:00:00 GMTTemplatesgeneric-lambdaslambdasfunction-objectstemplatescpp20https://cpp-next.com/blog/how-to-write-comparators-for-std-sort-and-std-maphttps://cpp-next.com/blog/how-to-write-comparators-for-std-sort-and-std-mapstd::sort, std::set and std::map need a strict weak ordering: the three rules, what breaks when one fails, and the comparison C++20’s <=> writes for you.Wed, 11 Nov 2026 00:00:00 GMTStandard Librarycomparatorsstrict-weak-orderingthree-way-comparisoncpp20https://cpp-next.com/blog/move-semantics-std-move-and-rvalue-referenceshttps://cpp-next.com/blog/move-semantics-std-move-and-rvalue-referencesWhat a move is, why std::move moves nothing, what C++17, C++20 and C++23 changed about temporaries and returns, and four move mistakes clang-tidy catches.Wed, 11 Nov 2026 00:00:00 GMTLanguagemove-semanticsrvalue-referencesstd-moveperfect-forwardingcpp20https://cpp-next.com/blog/pass-by-value-or-const-referencehttps://cpp-next.com/blog/pass-by-value-or-const-referenceBy value, const reference, && or a view? Choose each C++ parameter by what the function does with it, with the C++17 rules and a program that counts copies.Wed, 11 Nov 2026 00:00:00 GMTPerformanceparameter-passingcopy-elisionmove-semanticsstring-viewcpp20https://cpp-next.com/blog/rule-of-zero-and-special-member-functionshttps://cpp-next.com/blog/rule-of-zero-and-special-member-functionsWhich special member functions C++ declares for a class, what declaring one does to the others, and when to write none, all five, or delete them.Wed, 11 Nov 2026 00:00:00 GMTLanguagerule-of-zerospecial-member-functionsmove-semanticscpp20https://cpp-next.com/blog/std-expectedhttps://cpp-next.com/blog/std-expectedReturn a value or an error with std::expected (C++23): std::unexpected, what each accessor does in the wrong state, chaining, choosing E, and when to use it.Wed, 11 Nov 2026 00:00:00 GMTStandard Librarystd-expectedstd-optionalerror-handlingcpp23https://cpp-next.com/blog/std-maphttps://cpp-next.com/blog/std-mapUse a C++ map: look a key up with find, contains or at, add one with try_emplace, erase in a loop, and see what std::map does when a key is missing.Wed, 11 Nov 2026 00:00:00 GMTStandard Librarystd-mapstd-unordered-mapstd-flat-mapcpp17https://cpp-next.com/blog/std-optionalhttps://cpp-next.com/blog/std-optionalCreate, test, read, empty and refill a std::optional, what each accessor does when it is empty, what it costs, and when std::expected fits better.Wed, 11 Nov 2026 00:00:00 GMTStandard Librarystd-optionalstd-expectederror-handlingcpp17https://cpp-next.com/blog/std-printlnhttps://cpp-next.com/blog/std-printlnstd::println in C++23: the syntax, each std::cout and printf line translated, what a bad format string does, whether it flushes, and std::endl vs newline.Wed, 11 Nov 2026 00:00:00 GMTStandard Librarystd-printlnstd-coutstd-endlstd-formatcpp23https://cpp-next.com/blog/std-spanhttps://cpp-next.com/blog/std-spanTake std::span by value: what converts to it, slicing with subspan, what s[i] out of range does on each library, and how a span dangles.Wed, 11 Nov 2026 00:00:00 GMTStandard Librarystd-spanparameter-passingbounds-checkingcpp20https://cpp-next.com/blog/std-thread-and-jthreadhttps://cpp-next.com/blog/std-thread-and-jthreadStart a thread with std::thread or std::jthread (C++20): pass arguments with std::ref, get a result, stop it with a stop_token, and what a missed join prints.Wed, 11 Nov 2026 00:00:00 GMTConcurrencystd-threadstd-jthreadstop-tokencpp20https://cpp-next.com/blog/std-varianthttps://cpp-next.com/blog/std-variantCreate a std::variant, read it with std::get, get_if or std::visit, catch the missing case a conversion hides, and see what it costs and when to skip it.Wed, 11 Nov 2026 00:00:00 GMTStandard Librarystd-variantstd-visitstd-monostatecpp17https://cpp-next.com/blog/when-to-mark-a-move-constructor-noexcepthttps://cpp-next.com/blog/when-to-mark-a-move-constructor-noexceptMark moves and swap noexcept when they cannot throw, or std::vector copies where it could move. What is noexcept already, and how to check it at compile time.Wed, 11 Nov 2026 00:00:00 GMTPerformancenoexceptmove-semanticsstd-vectorexception-safetycpp20