concepts-ts | Technical Specification : Concepts
kandi X-RAY | concepts-ts Summary
kandi X-RAY | concepts-ts Summary
is the repository for the C++ Technical Specification "Extensions for Concepts". For the most recent draft of the lists generated from these files, see The active issues list can be found at: The Technical Specification concepts is found in the src directory and is written in LaTeX. There is a Makefile that can be used to compile the sources. An earlier version of the specification can be found in the html directory; it was written in HTML using a Javascript/CSS framework for formatting. This is not the current version of the document.
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QUESTION
What's going on here? It seems the ability to declare testGeneric
with an auto&
parameter creates a weird situation where the function can be used to implement multiple dispatch.
Tested on gcc 10.1 or newer with "-fconcepts-ts" flag, also works on x86-64 clang (old concepts branch) via Compiler Explorer.
...ANSWER
Answered 2021-May-05 at 23:04testGeneric
is an abbreviated function template. It is functionally equivalent to the template declaration
QUESTION
As the title suggest, I want foo
to only accept int
type as it's 2nd parameter.
ANSWER
Answered 2020-Nov-15 at 12:17You can keep the binary form even in current core concepts version:
QUESTION
The following code compiles fine on both gcc and clang (trunk with -std=c++20) but errors on msvc (19.27 /std:c++latest).
...ANSWER
Answered 2020-Oct-30 at 18:03Concepts cannot be used to replace typenames in C++20. However, that's not what your code is doing. You are using abbreviated function template syntax, by declaring the type of the parameter to use the placeholder type auto
. Abbreviated function templates can be constrained by applying a type-concept name to the auto
-declared parameter (some versions of VS have not implemented abbreviated function template syntax).
But this is not the syntax that was used in Concepts-TS, where a type concept would replace the typename.
QUESTION
The code below is excerpted from cppref:
...ANSWER
Answered 2020-Apr-09 at 21:03The Cppreference site documents many things in the C++ ecosystem. Some of those things are part of the standard, and some of them are parts of technical specifications. The latter all have "experimental" in the URL (and a big warning text box at the top of the page, apparently) and should only be used if you're using the TS in question. In this case, the concepts TS, from which the C++20 core language feature was adopted.
The two (Concepts TS and C++20) have sufficient differences that code written against one is highly unlikely to be compatible with a compiler for the other.
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