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Compiler support for C++20

From cppreference.com

* - hover over a cell marked with the star * to see additional pop-up notes.
DRnn - the number nn after "DR" denotes target C++ revision the Defect Report is applied to, e.g., DR20 → C++20.

[edit] C++20 core language features

C++20 feature

 
Paper(s)

 
GCC
Clang
MSVC
Apple Clang
EDG eccp
Intel C++
Nvidia HPC C++ (ex PGI)*
Nvidia nvcc
Cray
Allow Lambda capture [=, this] P0409R2 8 6 19.22* 10.0.0* 5.1 2021.1 20.7 12.0 11.0
__VA_OPT__ P0306R4
P1042R1
8 (partial)*
10 (partial)*
12
9 19.25* 11.0.3* 5.1 2021.1 20.7 12.0 11.0
Designated initializers  (FTM)* P0329R4 4.7 (partial)*
8
3.0 (partial)*
10
19.21* 12.0.0* 5.1 2021.1 20.7 12.0 11.0
template-parameter-list for generic lambdas  (FTM)* P0428R2 8 9 19.22* 11.0.0* 5.1 2021.1 20.7 12.0 11.0
Default member initializers for bit-fields P0683R1 8 6 19.25* 10.0.0* 5.1 2021.1 20.7 12.0 11.0
Initializer list constructors in class template argument deduction P0702R1 8 6 19.14* Yes 5.0 2021.1 20.7 12.0 11.0
const&-qualified pointers to members P0704R1 8 6 19.0 (2015)* 10.0.0* 5.1 2021.1 20.7 12.0 11.0
Concepts  (FTM)* P0734R0 5*
10
10 19.23* (partial)*
19.30*
12.0.0* (partial) 6.1 2023.1* 20.11 12.0 11.0
Lambdas in unevaluated contexts P0315R4 9 13 (partial)*
14 (partial)*
17
19.28 (16.8)* 13.1.6* (partial) 6.2 2023.1 (partial)
2024.0
20.7 12.0
Three-way comparison operator  (FTM)* P0515R3 10 8 (partial)
10
19.20* 12.0.0* 5.1 2021.1 20.7 12.0 11.0
DR11: Simplifying implicit lambda capture P0588R1 8 19.24* 5.1 2021.1 20.7 12.0