fix(interpreter): match range and or patterns in match statements

packages/interpreter/src/interpreter.zigmodified+24-0

Changes to packages/interpreter/src/interpreter.zig

		⋯12,391 linesShow the 12,391 lines above this hunk@@ -12392,6 +12392,30 @@ pub const Interpreter = struct {
12392	12392
12393	12393	return true;
12394	12394	},
	12395	+ .Range => |range_pattern| {
	12396	+ // Range pattern: start..end (exclusive) or start..=end (inclusive)
	12397	+ if (value != .Int) return false;
	12398	+ const start = try self.evaluateExpression(range_pattern.start, env);
	12399	+ const end = try self.evaluateExpression(range_pattern.end, env);
	12400	+ if (start != .Int or end != .Int) return false;
	12401	+ if (value.Int < start.Int) return false;
	12402	+ return if (range_pattern.inclusive) value.Int <= end.Int else value.Int < end.Int;
	12403	+ },
	12404	+ .Or => |or_patterns| {
	12405	+ // Or pattern: matches if any alternative matches. Each
	12406	+ // alternative binds into a scratch scope so a failed one
	12407	+ // leaves no bindings behind; the winner's are copied to env.
	12408	+ for (or_patterns) |alt_pattern| {
	12409	+ var alt_env = Environment.init(self.arena.allocator(), env);
	12410	+ defer alt_env.deinit();
	12411	+ if (try self.matchPatternNode(alt_pattern, value, &alt_env)) {
	12412	+ var it = alt_env.bindings.iterator();
	12413	+ while (it.next()) |entry| try env.define(entry.key_ptr.*, entry.value_ptr.*);
	12414	+ return true;
	12415	+ }
	12416	+ }
	12417	+ return false;
	12418	+ },
12395	12419	else => {
12396	12420	// Other pattern types not yet implemented
12397	12421	return false;