sdl-tests - an un-named 1-bit pixel art editor

	Commit message (Expand)	Author	Age	Files	Lines
*	use new error kinds; track Environment nesting with stack	Akshay	2021-03-25	4	-43/+85
*	move primitives.rs to prelude.rs	Akshay	2021-03-25	3	-174/+224
*	add checked downcast methods to LispExpr	Akshay	2021-03-25	1	-4/+58
*	ad display impls for parse and eval errors	Akshay	2021-03-25	1	-3/+107
*	new quit primitive	Akshay	2021-03-24	1	-0/+4
*	rename env to eval, add div operator	Akshay	2021-03-24	5	-9/+34
*	implement boolean primitives; `begin` form	Akshay	2021-03-24	1	-1/+30
*	allow minus operator, improve display for exprs	Akshay	2021-03-24	3	-25/+32
*	add lisp primitives: set!, define, lambda, if	Akshay	2021-03-24	1	-35/+171
*	expose functions to lisp interface, add primitives with macros	Akshay	2021-03-23	4	-57/+57
*	macro based primitive implementor	Akshay	2021-03-23	1	-0/+10
*	add types for lisp primitives and functions	Akshay	2021-03-23	3	-37/+44
*	add invert function and keybinds	Akshay	2021-03-23	1	-0/+1
*	init env	Akshay	2021-03-23	1	-0/+117
*	begin work on parser	Akshay	2021-03-20	3	-7/+262
*	factor out types into expr.rs	Akshay	2021-03-20	2	-40/+90
*	begin work on scripting lisp	Akshay	2021-03-19	4	-0/+423