Using g with negative indicies should return zero, not clamp

See https://tio.run/##S8sszvj/38BQF4jS86z//wcA
mousetail · Jun 18, 2024 · f04286b · f04286b
1 parent a20d69e
commit f04286b
Showing 1 changed file with 3 additions and 9 deletions.
diff --git a/src/scripts/interpreter.ts b/src/scripts/interpreter.ts
@@ -224,14 +224,8 @@ const commands: {[k: string]: <T>(o: ProgramState<T>) => void} = {
     },
     'g': (o) => {
         let [y, x] = [o.number_implementation.toIndex(pop(o)), o.number_implementation.toIndex(pop(o))];
-        if (x < 0) {
-            x = 0;
-        }
-        if (y < 0) {
-            y = 0;
-        }
-
-        if (y < o.program.length && x < o.program[y].length) {
+
+        if (x >= 0 && y >= 0 && y < o.program.length && x < o.program[y].length) {
             push(
                 o,
                 o.program[y][x]
@@ -307,4 +301,4 @@ export function step(o: AnyTypeProgramState) {
     } else {
         _step<Rational>(o)
     }
-}
+}