| 511 | |
| 512 | template <typename T> |
| 513 | inline nonstd::expected<T, std::string> Any::tryCast() const |
| 514 | { |
| 515 | static_assert(!std::is_reference<T>::value, "Any::cast uses value semantic, " |
| 516 | "can not cast to reference"); |
| 517 | |
| 518 | if(_any.empty()) |
| 519 | { |
| 520 | throw std::runtime_error("Any::cast failed because it is empty"); |
| 521 | } |
| 522 | |
| 523 | if(castedType() == typeid(T)) |
| 524 | { |
| 525 | return linb::any_cast<T>(_any); |
| 526 | } |
| 527 | |
| 528 | // special case when the output is an enum. |
| 529 | // We will try first a int conversion |
| 530 | if constexpr(std::is_enum_v<T>) |
| 531 | { |
| 532 | if(isNumber()) |
| 533 | { |
| 534 | return static_cast<T>(convert<int>().value()); |
| 535 | } |
| 536 | if(isString()) |
| 537 | { |
| 538 | if(auto out = stringToNumber<int64_t>()) |
| 539 | { |
| 540 | return static_cast<T>(out.value()); |
| 541 | } |
| 542 | } |
| 543 | return nonstd::make_unexpected("Any::cast failed to cast to enum type"); |
| 544 | } |
| 545 | |
| 546 | if(isString()) |
| 547 | { |
| 548 | if constexpr(std::is_arithmetic_v<T> && !std::is_same_v<T, bool>) |
| 549 | { |
| 550 | if(auto out = stringToNumber<T>()) |
| 551 | { |
| 552 | return out.value(); |
| 553 | } |
| 554 | else |
| 555 | { |
| 556 | return out; |
| 557 | } |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | if(auto res = convert<T>()) |
| 562 | { |
| 563 | return std::move(res.value()); |
| 564 | } |
| 565 | else |
| 566 | { |
| 567 | return res; |
| 568 | } |
| 569 | } |
| 570 |
no test coverage detected