9 commits

Author	SHA1	Message	Date
Alex Bethel	07195d4cf6	Fix panic on arithmetic error ... Divide by zero and add, subtract, or multiply with overflow are all caught now and reported as an ArithmeticError, rather than causing the interpreter to panic.	2021-05-30 13:32:29 -05:00
Alex Bethel	acfd81ead2	More thorough unit tests	2021-05-30 13:32:29 -05:00
Alex Bethel	344a11084e	Add some unit tests to interpret.rs ... Currently `overflow_should_not_panic` and `variable_persistence` both fail due to bugs in the interpreter.	2021-05-30 13:32:29 -05:00
Alex Bethel	585bf2e19f	Use single-letter identifiers as base-55 digits	2021-05-29 10:45:39 -05:00
Alex Bethel	c906366e3f	Improve name & documentation accuracy ... Renamed ControlFlow -> HaltStatus because that's what the enum really is -- a status on why something halted. Also reviewed `interpret.rs`'s documentation and fixed a few things that were out of date.	2021-05-25 21:55:02 -05:00
Alexander Bethel	ec81ead3ea	Implement break and hopback statements	2021-05-25 21:22:38 -05:00
Alexander Bethel	669f379700	Better abstractions, implement scoping rules	2021-05-25 13:26:01 -05:00
Alexander Bethel	109c77eeb2	Implement more statements ... Added variable declaration, `if` statements, `loop` statements, variable assignment, and variable banning to go along with printing (which was already implemented). We still need function declarations, brainfuck declarations, function calls, and the control flow operators "break" and "hopback".	2021-05-24 10:50:26 -05:00
Alexander Bethel	eccc00ff81	Implement basic interpreter ... Added code for interpreting parsed AbleScript expressions and statements, and hooked it up to the REPL.	2021-05-20 18:18:01 -05:00