From 9b333911476cb204b6edacf48ed18be4d2cdc0bb Mon Sep 17 00:00:00 2001
From: Dan Kalowsky <dkalowsky@amperecomputing.com>
Date: Fri, 9 Jul 2021 10:54:11 -0700
Subject: [PATCH] subsys/cpp: add support for C++2b

Add the ability to enable support for C++2B (aka 23) to the build
system.

Signed-off-by: Dan Kalowsky <dkalowsky@amperecomputing.com>
---
 CMakeLists.txt     | 2 ++
 subsys/cpp/Kconfig | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6e9c176eb0b..c3d53b8db65 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -169,6 +169,8 @@ if(CONFIG_CPLUSPLUS)
     set(STD_CPP_DIALECT_FLAGS $<TARGET_PROPERTY:compiler-cpp,dialect_cpp17>)
   elseif(CONFIG_STD_CPP20)
     set(STD_CPP_DIALECT_FLAGS $<TARGET_PROPERTY:compiler-cpp,dialect_cpp20>)
+  elseif(CONFIG_STD_CPP2B)
+    set(STD_CPP_DIALECT_FLAGS $<TARGET_PROPERTY:compiler-cpp,dialect_cpp2b>)
   else()
     assert(0 "Unreachable code. Expected C++ standard to have been chosen. See Kconfig.zephyr.")
   endif()
diff --git a/subsys/cpp/Kconfig b/subsys/cpp/Kconfig
index 8172ba9be8f..2faeb766e17 100644
--- a/subsys/cpp/Kconfig
+++ b/subsys/cpp/Kconfig
@@ -42,6 +42,11 @@ config STD_CPP20
 	help
 	  2020 C++ standard, previously known as C++2A.
 
+config STD_CPP2B
+	bool "C++ 2b"
+	help
+	  Next revision of the C++ standard, which is expected to be published in 2023.
+
 endchoice
 
 config LIB_CPLUSPLUS