Struct ReturnsHandledOrError

pub struct ReturnsHandledOrError<Env, Original, NHList>
where
    Env: TxEnv,
    NHList: RHList<Env>,
{
    pub nested_handlers: NHList,
    /* private fields */
}

Indicates that a Result will be returned, either with the handled result, according to the nested result handlers, or with an error in case of a failed transaction.

Fields

nested_handlers: NHList

Implementations

impl<Env, Original> ReturnsHandledOrError<Env, Original, OriginalResultMarker<Original>>

where Env: TxEnv,

pub fn new() -> Self

impl<Env, Original, NHList> ReturnsHandledOrError<Env, Original, NHList>

where Env: TxEnv, NHList: RHListExec<TxResponse, Env>,

pub fn returns<RH>( self, item: RH, ) -> ReturnsHandledOrError<Env, Original, NHList::RetOutput>

where RH: RHListItem<Env, NHList::OriginalResult>, NHList: RHListAppendRet<Env, RH>,

Trait Implementations

impl<Env, Original> Default for ReturnsHandledOrError<Env, Original, OriginalResultMarker<Original>>

where Env: TxEnv,

fn default() -> Self

Returns the “default value” for a type.

impl<Env, Original, NHList> RHListItem<Env, Original> for ReturnsHandledOrError<Env, Original, NHList>

where Env: TxEnv, NHList: RHListExec<TxResponse, Env>, NHList::ListReturns: NestedTupleFlatten,

type Returns = Result<<<NHList as RHList<Env>>::ListReturns as NestedTupleFlatten>::Unpacked, TxResponseStatus>

impl<Env, Original, NHList> RHListItemExec<TxResponse, Env, Original> for ReturnsHandledOrError<Env, Original, NHList>

where Env: TxEnv<RHExpect = TxExpect>, NHList: RHListExec<TxResponse, Env>, NHList::ListReturns: NestedTupleFlatten,

fn item_tx_expect(&self, prev: TxExpect) -> TxExpect

Part of the execution pre-processing, each result handler needs to produce an “expect” field, as defined in the environment.

fn item_process_result(self, raw_result: &TxResponse) -> Self::Returns

The main functionality of a result handler, it either does some computation internally (e.g. execution of a lambda function), or produces a result, or both.