9 commits

Author	SHA1	Message	Date
Alex Bethel	b3866eea9e	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	d13c22a473	More thorough unit tests	2021-05-30 13:32:29 -05:00
Alex Bethel	7bfefd3ba1	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	00e80e9740	Use single-letter identifiers as base-55 digits	2021-05-29 10:45:39 -05:00
Alex Bethel	51db37f1fe	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 Also reviewed `interpret.rs`'s documentation and fixed a few things that were out of date.	2021-05-25 21:55:02 -05:00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	7537b4ac98	Implement break and hopback statements	2021-05-25 21:22:38 -05:00
Alexander Bethel	e7560f9364	Better abstractions, implement scoping rules	2021-05-25 13:26:01 -05:00
Alexander Bethel	1c2032ab87	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	e31b8fb00d	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