Need a new type of Hold

*To*: mathgroup at smc.vnet.net*Subject*: [mg7499] Need a new type of Hold*From*: Ersek_Ted%PAX1A at mr.nawcad.navy.mil*Date*: Sat, 7 Jun 1997 03:48:20 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

I could use a new type of Hold that is similar to HoldForm. The difference is I don't want the new Hold to show up in the FullForm. Lets call this new feature HoldTemporary. The following shows the way I want it to work. (*-----------------------------------------*) In[1]:= foo=HoldTemporary[z+2+d+a+3] Out[1]= z+2+d+a+3 In[2]:= foo-d+4 Out[2]= 9+a+z In[3]:= HoldTemporary[z+2+d+a+3]//FullForm Out[3]= Plus[z,2,d,a,3] (*------------------------------------------*) Using HoldForm I have to do the above as follows: In[4]:= goo=HoldForm[z+2+d+a+3] Out[4]= z+2+d+a+3 In[5]:= ReleaseHold[goo]-d+4 Out[5]= 9+a+z (*------------------------------------------*) The feature I want will make it easy to write Packages that display the output in a non-standard way, but will not place an extra burden on the user of the package. Can HoldTemporary be built with features included in Mma 3.0 ? I have tried, and can't find a way. Ted Ersek ersek_ted%pax1a at mr.nawcad.navy.mil