Difference between revisions of "C++20"

Revision as of 03:34, 2 September 2023

Some things that will be interesting to use once C++20 is common:

Feature	Since	Can use?	Apple Clang	Comment
`std::span`	C++20	from 1.3?	11.0.3	Handle buffers like standard library containers without risk of overflow.
`std::format`	C++20		N/A	Better and more efficient formatting of strings.
`std::lerp`	C++20	from 1.4?	11.0.3	Linear interpolation. (ui/tools/pencil-tool.cpp)
`std::bit_floor`	C++20	from 1.4?	11.0.3/13.0.0	Compute floor(log2(x)). (helper/mathfns.h)
`Concepts`	C++20	from 1.4?	12.0.0 Partial	Safer templating. (ui/controller.h)
`Coroutines`	C++20		10.0.1 Partial	Simpler asynchronous code. (trace/trace.cpp)
`std::make_unique_for_overwrite`	C++20		N/A	Don't zero arrays allocated using std::make_unique. (util/pool.cpp)
`Ranges`	C++20	from 1.4?	?	for (init; decl : expr). (ui/dialog/swatches.cpp)
`Structural templates`	C++20	from 1.4?	Partial	Allow instances of arbitrary literal classes as template parameters. (display/drawing.cpp)

As of 1 September 2023, the CI runners for macOS are using Apple Clang 13.1.6 (ARM) and Apple Clang 14.0.0 (Intel64).

@@ Line 24: / Line 24: @@
 | <code>Ranges</code>               || C++20 ||                                   from 1.4? || ?      || for (init; decl : expr). (ui/dialog/swatches.cpp)
 |-
-| <code>[https://stackoverflow.com/a/60244416/5075760 Structural templates]</code> || C++20 ||                                   from 1.4? || ?      || Allow instances of arbitrary literal classes as template parameters. (display/drawing.cpp)
+| <code>[https://stackoverflow.com/a/60244416/5075760 Structural templates]</code> || C++20 ||                                   from 1.4? || Partial      || Allow instances of arbitrary literal classes as template parameters. (display/drawing.cpp)
 |}
 As of 1 September 2023, the CI runners for macOS are using Apple Clang 13.1.6 (ARM) and Apple Clang 14.0.0 (Intel64).