A Type for Overload Set
The article explores C++ overload set challenges, discussing issues with standard functions encountering problems due to overloading. It introduces proposal P3312 for a unique type to address these limitations, emphasizing the need for a more efficient solution.
Read original article
In a detailed exploration of C++ programming challenges, the article delves into issues with overload sets and the limitations they pose in the language. It discusses various scenarios where standard functions like std::to_string and std::min encounter problems due to overloading, leading to workarounds involving lambdas. The text highlights the proposal P3312 - Overload Set Types, aiming to introduce a unique type for overload sets to address these issues. The article also presents macro solutions like OVERLOAD for free functions and function templates, but notes the complexity in handling overloaded member functions. Despite the power of lambdas in resolving such challenges, the need for a dedicated type for overload sets is emphasized for a more elegant and efficient solution. The conclusion suggests that while the proposal holds promise, the intricacies of overloading may delay its implementation in C++, underscoring the continued importance of leveraging lambdas for resolving errors in the meantime.
Related
Own Constant Folder in C/C++
Neil Henning discusses precision issues in clang when using the sqrtps intrinsic with -ffast-math, suggesting inline assembly for instruction selection. He introduces a workaround using __builtin_constant_p for constant folding optimization, enhancing code efficiency.
How the STL Uses Explicit
The WG21 meeting in St. Louis discusses a paper on using the `explicit` keyword in C++ proposals to establish a style guide for consistency. Guidelines differ between industry and Standard Library practices.
Weekend projects: getting silly with C
The C programming language's simplicity and expressiveness, despite quirks, influence other languages. Unconventional code structures showcase creativity and flexibility, promoting unique coding practices. Subscription for related content is encouraged.
Reflection for C++26
The P2996R4 document proposes a reduced set of static reflection features in C++26, using constant expressions, a reflection operator, metafunctions, and splicers. Implementation progress is ongoing by Lock3 and EDG.
I _____ hate arrays in C++
The article explores challenges in using arrays in C++, focusing on array-to-pointer conversion pitfalls, differences from pointers, and practical examples of errors. Caution and awareness are advised for C++ developers.
3 commentsOn the other hand, I don't even know how transform is defined. C++ has nothing exactly like IEnumerable<T>, so maybe it is hard to refer to the T? And of course what the article references, that there is no way to refer to the overload set.
I usually like C++, but it is not fun when the abstractions break like that.
>There is a recent proposal that aims to address this exact issue: P3312 - Overload Set Types.
Painfully common story.
#define FWD(...) ::std::forward<decltype(__VA_ARGS__)>(__VA_ARGS__)
#define LIFT_CUSTOM(X, CAPTURE) CAPTURE (auto &&... args) \
noexcept(noexcept(X(FWD(args)...))) -> decltype((X(FWD(args)...))) { \
return X(FWD(args)...); \
}
#define LIFT(X) LIFT_CUSTOM(X, [&])Related
Own Constant Folder in C/C++
Neil Henning discusses precision issues in clang when using the sqrtps intrinsic with -ffast-math, suggesting inline assembly for instruction selection. He introduces a workaround using __builtin_constant_p for constant folding optimization, enhancing code efficiency.
How the STL Uses Explicit
The WG21 meeting in St. Louis discusses a paper on using the `explicit` keyword in C++ proposals to establish a style guide for consistency. Guidelines differ between industry and Standard Library practices.
Weekend projects: getting silly with C
The C programming language's simplicity and expressiveness, despite quirks, influence other languages. Unconventional code structures showcase creativity and flexibility, promoting unique coding practices. Subscription for related content is encouraged.
Reflection for C++26
The P2996R4 document proposes a reduced set of static reflection features in C++26, using constant expressions, a reflection operator, metafunctions, and splicers. Implementation progress is ongoing by Lock3 and EDG.
I _____ hate arrays in C++
The article explores challenges in using arrays in C++, focusing on array-to-pointer conversion pitfalls, differences from pointers, and practical examples of errors. Caution and awareness are advised for C++ developers.