X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?p=rmac;a=blobdiff_plain;f=expr.c;h=23f6a14afcbb0c46561c101b6d0e43e382acbb56;hp=1747c8441666c4d79815b9b11dd20609d027dbf8;hb=295836a17362d5f57e171018fb6658f845f419e8;hpb=26bc03271bede4256ab52496d52de67018e33a01

diff --git a/expr.c b/expr.c
index 1747c84..23f6a14 100644
--- a/expr.c
+++ b/expr.c
@@ -328,12 +328,17 @@ int expr2(void)
 //
 int expr(TOKEN * otk, VALUE * a_value, WORD * a_attr, SYM ** a_esym)
 {
+	// Passed in values (once derefenced, that is) can all be zero. They are
+	// there so that the expression analyzer can fill them in as needed. The
+	// expression analyzer gets its input from "tok", and not from anything
+	// passed in by the user.
 	SYM * sy;
 	char * p;
 	int j;
 
-	tk = otk;								// Set token pointer to 'exprbuf' (direct.c)
-//	symbolNum = 0;							// Set symbol number in symbolPtr[] to 0
+	tk = otk;			// Set token pointer to 'exprbuf' (direct.c)
+						// Also set in various other places too (risca.c, e.g.)
+//	symbolNum = 0;		// Set symbol number in symbolPtr[] to 0
 
 	// Optimize for single constant or single symbol.
 	if ((tok[1] == EOL)