record array(a,b,c,d,e,f,g)

procedure dummy(u,v,x,y,z)
   suspend u | v
   return x
end

procedure main()
   write("s := \"abcd\" ----> ",image(s := "abcd") | "none")
   write("{s[1:2] := \"xx\";s} ----> ",image({s[1:2] := "xx";s}) | "none")
   write("{s[-1:0] := \"\";s} ----> ",image({s[-1:0] := "";s}) | "none")
   write("{s[1] := \"abc\";s} ----> ",image({s[1] := "abc";s}) | "none")
   write("{s[1+:2] := \"y\";s} ----> ",image({s[1+:2] := "y";s}) | "none")
   write("{s[2] :=: s[3];s} ----> ",image({s[2] :=: s[3];s}) | "none")
   write("s[6] := \"t\" ----> ",image(s[6] := "t") | "none")
   write("s[0-:6] := \"u\" ----> ",image(s[0-:6] := "u") | "none")
   write("{s[1:0] :=: s[0:1];s} ----> ",image({s[1:0] :=: s[0:1];s}) | "none")
   write(".1(s[1],s := &null) ----> ",image(.1(s[1],s := &null)) | "none")
end