Slice Expressions

Syntax

x[sarrow_pri] := x[>sarrow_pri] ".." x[>sarrow_pri]
x[sarrow_pri] := x[>sarrow_pri] "..<" x[>sarrow_pri]
x[sarrow_pri] := "..<" x[>sarrow_pri]
x[sarrow_pri] := ".." x[>sarrow_pri]
x[sarrow_pri] := x[>sarrow_pri] ".."
x[sarrow_pri] := ".."
x[sarrow_pri] := x[>sarrow_pri] ".+" x[>sarrow_pri]