Comment by HolyBlackCat on vscode Linux - mpi.h not found
This is a compiler, not intelliense error. c_cpp_properties.json only affects intelliense. You need -I in tasks.json pointing to that include directory.
View ArticleComment by HolyBlackCat on VSCode - is it possible to have different Language...
IMO a proper answer would explain how to make/find an extension for it, I don't want to post just "impossible without an extension".
View ArticleComment by HolyBlackCat on Functors not recognized as transform_view args
You just linked to the main page of godbolt.org, there's no code there. Please also paste the full code to the question itself.
View ArticleComment by HolyBlackCat on Why does C++ allow making a reference to a...
There's no legitimate usecase, and sometimes compilers warn about this (not in this case for some reason, though). Mandatory error here sounds hard to implement in general. (Without a radical rust-like...
View ArticleComment by HolyBlackCat on Is it legal that only declaring a function without...
I would also add a simple definition of ODR-used.
View ArticleComment by HolyBlackCat on Bug in Clang code generation for member...
Please don't add the solution to the question. Post it as an answer below.
View ArticleComment by HolyBlackCat on Why do I get a make: *** No target specified and...
Install MSYS2, install make in it. Run ./configure and make inside MSYS2 terminal.
View ArticleComment by HolyBlackCat on unicode symbol breaks formatting in c++20
@Super-intelligentShade It's supposed to be unicode-aware, I believe.
View ArticleComment by HolyBlackCat on How to build new types by expand a parameter pack...
Are you limited to C++17? C++20 template lambdas make this way easier. Also, using a tuple like this is probably bad for build times. Make an empty struct template to represent type lists.
View ArticleComment by HolyBlackCat on How to remove the "*" in c++ macro args?
So the only reason you need to remove the * is to generate a unique function name based on the type?
View ArticleAnswer by HolyBlackCat for Why is it illegal to take the address of the...
This is an artificial restriction.Compiler optimizations aside, this acts as a hidden pointer parameter to member functions. (Yes, it could sit in a register, but so can regular pointer...
View ArticleAnswer by HolyBlackCat for How to define a template function for a base-type...
Function templates can't be partially specialized.Your options are:One big function with a bunch of if constexpr in it.Overloading the function instead of specializing.Wrapping the function in a class...
View ArticleAnswer by HolyBlackCat for How to safely take all elements from a map?
You unnecessarily wrap std::move, just do Map m2 = std::move(m); directly in main().As others have noted, it's theoretically possible for m to not be empty after this, so you can follow up with...
View ArticleAnswer by HolyBlackCat for Specialize template class for some types
In C++20 you can use requires as following. (For earlier language versions, use std::enable_if as explained in the other ansert.)template <typename T> class A {};template <typename T>...
View ArticleAnswer by HolyBlackCat for C++ difference in forwarding references between...
T will be &, const &, && or const && according to the value categoryT is never deduced as an rvalue reference. It can be deduced as a non-reference though (for rvalue...
View ArticleAnswer by HolyBlackCat for How to wrap class method to C function if it...
There are several ways of doing this using requires, depending on how strictly you want to check the method.E.g.:device_module_info cls{};if constexpr (requires(DeviceHandleImpl h, off_t pos, void...
View ArticleAnswer by HolyBlackCat for const global array of a single character?
Immediately invoked lambda to the rescue:constexpr auto tabs = []{std::array<char, 32> ret; ret.fill('\t'); return ret;}();
View ArticleAnswer by HolyBlackCat for C++20 Concept to check tuple-like types
Most of the time I just do this:template<typename T>concept TupleLike = requires{std::tuple_size<T>::value;};// Can't use `std::tuple_size_v` as it's not SFINAE-friendly.If something else...
View ArticleAnswer by HolyBlackCat for `std::iota_view` is slow when given different...
When iota_view receives different argument types, .end() returns a sentinel instead of an iterator.A sentinel is a type that's ==-comparable with an iterator, and optionally subtractible from it (the...
View ArticleIs it possible to overload a function to properly accept any template as...
I know it's impossible to have a single template template parameter that would accept any template.But I thought it was possible with enough overloads:template <template <typename...>...
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