Update

syntax/cpp.vim

@@ -4,6 +4,7 @@ if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'c/c++') == -1
 " Language:	C++
 " Current Maintainer:	vim-jp (https://github.com/vim-jp/vim-cpp)
 " Previous Maintainer:	Ken Shan <ccshan@post.harvard.edu>
+" Last Change:	2017 Jun 05
 
 " quit when a syntax file was already loaded
 if exists("b:current_syntax")
@@ -43,6 +44,8 @@ if !exists("cpp_no_cpp11")
   syn keyword cppConstant	ATOMIC_INT_LOCK_FREE ATOMIC_LONG_LOCK_FREE
   syn keyword cppConstant	ATOMIC_LLONG_LOCK_FREE ATOMIC_POINTER_LOCK_FREE
   syn region cppRawString	matchgroup=cppRawStringDelimiter start=+\%(u8\|[uLU]\)\=R"\z([[:alnum:]_{}[\]#<>%:;.?*\+\-/\^&|~!=,"']\{,16}\)(+ end=+)\z1"+ contains=@Spell
+  syn match cppCast		"\<\(const\|static\|dynamic\)_pointer_cast\s*<"me=e-1
+  syn match cppCast		"\<\(const\|static\|dynamic\)_pointer_cast\s*$"
 endif
 
 " C++ 14 extensions
@@ -54,6 +57,21 @@ if !exists("cpp_no_cpp14")
   syn case match
 endif
 
+" C++ 17 extensions
+if !exists("cpp_no_cpp17")
+  syn match cppCast		"\<reinterpret_pointer_cast\s*<"me=e-1
+  syn match cppCast		"\<reinterpret_pointer_cast\s*$"
+endif
+
+" C++ 20 extensions
+if !exists("cpp_no_cpp20")
+  syn keyword cppStatement	co_await co_return co_yield requires
+  syn keyword cppStorageClass	consteval constinit
+  syn keyword cppStructure	concept
+  syn keyword cppType		char8_t
+  syn keyword cppModule		import module export
+endif
+
 " The minimum and maximum operators in GNU C++
 syn match cppMinMax "[<>]?"
 
@@ -72,6 +90,7 @@ hi def link cppConstant		Constant
 hi def link cppRawStringDelimiter	Delimiter
 hi def link cppRawString		String
 hi def link cppNumber		Number
+hi def link cppModule		Include
 
 let b:current_syntax = "cpp"