Re: PATCH: return status of let with floats

[Peter Stephenson <pws@xxxxxxx>]

Oliver Kiddle wrote:
> All of bash, pdksh and ksh 88/93 output 0 for `echo $(( ))' by the way
> while zsh gives a bad math expression error so that should perhaps also
> be changed.

This handles that particular case, though I don't know if it's supposed
to be something more general.

Index: Src/math.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/math.c,v
retrieving revision 1.16
diff -u -r1.16 math.c
--- Src/math.c	30 Oct 2002 19:29:42 -0000	1.16
+++ Src/math.c	18 Dec 2002 17:58:44 -0000
@@ -961,7 +961,7 @@
     stack[0].val.u.l = 0;
     mathparse(prek);
     *ep = ptr;
-    DPUTS(!errflag && sp,
+    DPUTS(!errflag && sp > 0,
 	  "BUG: math: wallabies roaming too freely in outback");
 
     if (errflag) {
@@ -1084,6 +1084,9 @@
     if (errflag)
 	return;
     mtok = zzlex();
+    /* Handle empty input */
+    if (pc == TOPPREC && mtok == EOI)
+	return;
     checkunary(mtok, optr);
     while (prec[mtok] <= pc) {
 	if (errflag)

-- 
Peter Stephenson <pws@xxxxxxx>                  Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 692070


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