Merge 2022-07 CWG Motion 6

P2362R3 Remove non-encodable wide character literals and multicharacter wide character literals

Author: tkoeppe

source/lex.tex

@@ -1356,7 +1356,7 @@
 more than one \grammarterm{c-char}.
 The \grammarterm{encoding-prefix} of
 a non-encodable character literal or a multicharacter literal
-shall be absent or \tcode{L}.
+shall be absent.
 Such \grammarterm{character-literal}s are conditionally-supported.
 
 \pnum
@@ -1367,17 +1367,17 @@
 as defined by \tref{lex.ccon.literal}.
 The special cases for
 non-encodable character literals and multicharacter literals
-take precedence over their respective base kinds.
+take precedence over the base kind.
 \begin{note}
-The associated character encoding for ordinary and wide character literals
+The associated character encoding for ordinary character literals
 determines encodability,
 but does not determine the value of
-non-encodable ordinary or wide character literals or
-ordinary or wide multicharacter literals.
+non-encodable ordinary character literals or
+ordinary multicharacter literals.
 The examples in \tref{lex.ccon.literal}
-for non-encodable ordinary and wide character literals assume that
+for non-encodable ordinary character literals assume that
 the specified character lacks representation in
-the ordinary literal encoding or wide literal encoding, respectively, or
+the ordinary literal encoding or
 that encoding the character would require more than one code unit.
 \end{note}
 
@@ -1405,18 +1405,9 @@
 \tcode{L} &
 \defnx{wide character literal}{literal!character!wide} &
 \keyword{wchar_t} &
-wide &
-\tcode{L'w'} \\ \cline{2-3}\cline{5-5}
- &
-non-encodable wide character literal &
-\keyword{wchar_t} &
-literal &
-\tcode{L'\textbackslash U0001F32A'} \\ \cline{2-3}\cline{5-5}
- &
-wide multicharacter literal &
-\keyword{wchar_t} &
-encoding &
-\tcode{L'abcd'} \\ \hline
+wide literal &
+\tcode{L'w'} \\
+ & & & encoding & \\ \hline
 \tcode{u8} &
 \defnx{UTF-8 character literal}{literal!character!UTF-8} &
 \keyword{char8_t} &