| 479 | } |
| 480 | |
| 481 | Errata |
| 482 | Mod_filter::Case::pre_load(Config &cfg, YAML::Node cmp_node) |
| 483 | { |
| 484 | if (!cmp_node.IsMap()) { |
| 485 | return Errata(S_ERROR, "List element at {} for {} modifier is not a comparison object.", cmp_node.Mark(), KEY); |
| 486 | } |
| 487 | |
| 488 | Expr replace_expr; |
| 489 | unsigned action_count = 0; |
| 490 | |
| 491 | if (auto do_node = cmp_node[Global::DO_KEY]; do_node) { |
| 492 | return Errata(S_ERROR, R"("{}" at line {} is not allowed in a modifier comparison.)", Global::DO_KEY, do_node.Mark()); |
| 493 | } |
| 494 | |
| 495 | YAML::Node drop_node = cmp_node[ACTION_DROP]; |
| 496 | if (drop_node) { |
| 497 | _action = DROP; |
| 498 | cmp_node.remove(ACTION_DROP); |
| 499 | ++action_count; |
| 500 | } |
| 501 | |
| 502 | YAML::Node pass_node = cmp_node[ACTION_PASS]; |
| 503 | if (pass_node) { |
| 504 | _action = PASS; |
| 505 | cmp_node.remove(ACTION_PASS); |
| 506 | ++action_count; |
| 507 | } |
| 508 | |
| 509 | YAML::Node replace_node = cmp_node[ACTION_REPLACE]; |
| 510 | if (replace_node) { |
| 511 | auto &&[expr, errata] = cfg.parse_expr(replace_node); |
| 512 | if (!errata.is_ok()) { |
| 513 | errata.note("While parsing expression at {} for {} key in comparison at {}.", replace_node.Mark(), ACTION_REPLACE, |
| 514 | cmp_node.Mark()); |
| 515 | return std::move(errata); |
| 516 | } |
| 517 | _expr = std::move(expr); |
| 518 | _action = REPLACE; |
| 519 | cmp_node.remove(ACTION_REPLACE); |
| 520 | ++action_count; |
| 521 | } |
| 522 | |
| 523 | if (action_count > 1) { |
| 524 | return Errata(S_ERROR, "Only one of {}, {}, {} is allowed in the {} comparison at {}.", ACTION_REPLACE, ACTION_DROP, |
| 525 | ACTION_PASS, KEY, cmp_node.Mark()); |
| 526 | } |
| 527 | |
| 528 | return {}; |
| 529 | } |
| 530 | |
| 531 | bool |
| 532 | Mod_filter::Case::operator()(Context &ctx, Feature const &feature) |