The util::Expected class provides a standard way for low-level functions to return either error values or result values.
Declared in <util/expected.h>
template<
class T,
class E>
class Expected;It provides a smaller version of std::expected from C++23. Missing features can be added, if needed.
| Name | Description |
|---|---|
Expected [constructor] | Constructors |
error | Access the stored error (undefined behavior if a value is held). |
has_value | Test whether a result value is held. |
operator* | Access the result value without checking. |
operator-> | Access members of the result value. |
swap | Swap contents with another Expected. |
value | Access the result value, throwing if an error is held. |
value_or | Return the result value, or a fallback when an error is held. |
operator bool | Test whether a result value is held. |
| Name |
|---|
Expected<void, E> |
| Name | Description |
|---|---|
::FeeRateEstimationRef | Return the estimation carried by a fee rate estimate result: the successful estimation, or the error's zero-value estimation. |
::ParseKeyPathElement | Parse a single key path element like "0", "0'", or "0h". Returns the derivation index and hardened status, or an error message. |
::SignPSBTInput | Signs a PSBTInput, verifying that all provided data matches what is being signed. |
::wallet::ExportDescriptors | Export the descriptors from a wallet so that they can be imported elsewhere |