a scheme repl could borrow a leaf from tcl's book by preprocessing everything you typed in to let you (a) omit the outermost parens and (b) mix () and [] freely

a scheme repl could borrow a leaf from tcl's book by preprocessing everything you typed in to let you (a) omit the outermost parens and (b) mix () and [] freely. would be an interesting experiment to see if it had a better feel for this sort of interactive scripting