[cwchar.syn] Improve indexing for macros

Author: AlisdairM

source/text.tex

@@ -13055,7 +13055,6 @@
 \indexlibraryglobal{towupper}%
 \indexlibraryglobal{towctrans}%
 \indexlibraryglobal{wctrans}%
-\indexlibraryglobal{WEOF}%
 \begin{codeblock}
 namespace std {
   using wint_t = @\seebelow@;
@@ -13082,7 +13081,7 @@
   wctrans_t wctrans(const char* property);
 }
 
-#define WEOF @\seebelow@
+#define @\libmacro{WEOF}@ @\seebelow@
 \end{codeblock}
 
 \pnum
@@ -13094,10 +13093,6 @@
 \rSec2[cwchar.syn]{Header \tcode{<cwchar>} synopsis}
 
 \indexheader{cwchar}%
-\indexlibraryglobal{NULL}%
-\indexlibraryglobal{WCHAR_MAX}%
-\indexlibraryglobal{WCHAR_MIN}%
-\indexlibraryglobal{WEOF}%
 \indexlibraryglobal{btowc}%
 \indexlibraryglobal{fgetwc}%
 \indexlibraryglobal{fgetws}%
@@ -13237,10 +13232,10 @@
   size_t wcsrtombs(char* dst, const wchar_t** src, size_t len, mbstate_t* ps);
 }
 
-#define NULL @\textit{see \ref{support.types.nullptr}}@                                                  // freestanding
-#define WCHAR_MAX @\seebelow@                                             // freestanding
-#define WCHAR_MIN @\seebelow@                                             // freestanding
-#define WEOF @\seebelow@                                                  // freestanding
+#define @\libmacro{NULL}@ @\textit{see \ref{support.types.nullptr}}@                                                  // freestanding
+#define @\libmacro{WCHAR_MAX}@ @\seebelow@                                             // freestanding
+#define @\libmacro{WCHAR_MIN}@ @\seebelow@                                             // freestanding
+#define @\libmacro{WEOF}@ @\seebelow@                                                  // freestanding
 \end{codeblock}
 
 \pnum