Refactor interpreter to handle division by zero errors

vaibhavsijaria · Oct 3, 2024 · 4ac57fc · 4ac57fc
1 parent f359d33
commit 4ac57fc
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Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/src/error.zig b/src/error.zig
@@ -15,6 +15,7 @@ pub const RuntimeError = error{
     IncompatibleTypes,
     InvalidOperation,
     NullType,
+    DivisionByZero,
 };
 
 pub const Error = struct {

diff --git a/src/interpreter.zig b/src/interpreter.zig
@@ -89,7 +89,13 @@ pub const Interpreter = struct {
                 .PLUS => obj{ .num = l + right.num },
                 .MINUS => obj{ .num = l - right.num },
                 .STAR => obj{ .num = l * right.num },
-                .SLASH => obj{ .num = l / right.num },
+                .SLASH => slash: {
+                    if (right.num == 0) {
+                        Error.printerr(expr.operator, "Division by zero");
+                        break :slash RuntimeErrors.DivisionByZero;
+                    }
+                    break :slash obj{ .num = l / right.num };
+                },
                 .GREATER => obj{ .boolean = l > right.num },
                 .GREATER_EQUAL => obj{ .boolean = l >= right.num },
                 .LESS => obj{ .boolean = l < right.num },