#657 Extended assignment

[Erich]

It would be nice to have an extended form of assignment

Var1, Var2 [, ..] = Var3 [, Var4 [, ..]]

This would allow for a concise specification of:

a) a,b,c=0 -- Initialize more than variable
b) x,y = y,x -- Exchange two variables with a helper variable
c) r, s, phi = eea(a, b) -- eea() returns an array of three items

[Erich]

Sent too quick ..

"Initialize more than variable" should read "more than one variable"
"Exchange two variables with a helper variable" should read ".. without a helper variable"