sdl phase 1

src/parser.zig

@@ -292,6 +292,28 @@ pub const Parser = struct {
             self.advance();
             return try self.createNode(start, .{ .type_expr = .{ .name = name, .is_generic = true } });
         }
+        // Function pointer type: (ParamTypes) -> ReturnType
+        if (self.current.tag == .l_paren) {
+            self.advance(); // skip '('
+            var param_types = std.ArrayList(*Node).empty;
+            while (self.current.tag != .r_paren and self.current.tag != .eof) {
+                if (param_types.items.len > 0) {
+                    try self.expect(.comma);
+                }
+                try param_types.append(self.allocator, try self.parseTypeExpr());
+            }
+            try self.expect(.r_paren);
+            var return_type: ?*Node = null;
+            if (self.current.tag == .arrow) {
+                self.advance(); // skip '->'
+                return_type = try self.parseTypeExpr();
+            }
+            return try self.createNode(start, .{ .function_type_expr = .{
+                .param_types = try param_types.toOwnedSlice(self.allocator),
+                .return_type = return_type,
+            } });
+        }
+
         if (self.current.tag.isTypeKeyword() or self.current.tag == .identifier) {
             var name = self.tokenSlice(self.current);
             self.advance();