improve code package: deactivate | symbol in tables. make | and code usable inside other macros by rescanning the token list

src/wip/code/code.pysty

@@ -4,6 +4,9 @@ __NEW_IF__(pipe,false)
 \DeclareOption{pipe}{__SET_IF__(pipe,true)}
 \ProcessOptions
 
+
+% This is needed in general: when _ is active, we want it to expand to
+% an actual _ character
 \catcode`_=13
 \let_\_
 \catcode`_=8
@@ -20,20 +23,12 @@ __NEW_IF__(pipe,false)
   }
 \ExplSyntaxOff
 
-\newif\ifactive\activefalse
 __IF__(pipe)
   \catcode`|=\active
-  \def|{
-    \ifactive
-      \endgroup
-      \activefalse
-    \else
-      \begingroup
-      \catcode`_=13
-      \ttfamily
-    \fi
+  \def|#1|{
+    \code{#1}
   }
-% Quick fix for tables
-\AddToHook{env/tabular/begin}[code]{\catcode`|=13}
-\AddToHook{env/tabular/end}[code]{\catcode`|=8}
+% Do not make | active inside tables
+\AddToHook{env/tabular/before}[code]{\catcode`|=12}
+\AddToHook{env/tabular/after}[code]{\catcode`|=13}
 \fi