Trait ColumnSelectorOne 

pub trait ColumnSelectorOne {
    type FIRST: Decompress;

    const MASK: usize;
}

Available on crate feature provider only.

Trait for specifying a mask to select one column value.

Required Associated Constants

const MASK: usize

Mask to obtain desired values, should correspond to the order of columns in a static_file.

Required Associated Types

type FIRST: Decompress

First desired column value

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl ColumnSelectorOne for AccountChangesetMask

where <AccountChangeSets as Table>::Value: Send + Sync + Debug + Decompress,

const MASK: usize = 0b1

type FIRST = <AccountChangeSets as Table>::Value

impl ColumnSelectorOne for BlockHashMask

where FixedBytes<32>: Send + Sync + Debug + Decompress,

const MASK: usize = 0b100

type FIRST = FixedBytes<32>

impl ColumnSelectorOne for StorageChangesetMask

where StorageBeforeTx: Send + Sync + Debug + Decompress,

const MASK: usize = 0b1

type FIRST = StorageBeforeTx

impl ColumnSelectorOne for TotalDifficultyMask

where <HeaderTerminalDifficulties as Table>::Value: Send + Sync + Debug + Decompress,

const MASK: usize = 0b010

type FIRST = <HeaderTerminalDifficulties as Table>::Value

impl ColumnSelectorOne for TransactionSenderMask

where Address: Send + Sync + Debug + Decompress,

const MASK: usize = 0b1

type FIRST = Address

impl<H> ColumnSelectorOne for HeaderMask<H>

where H: Send + Sync + Debug + Decompress,

const MASK: usize = 0b001

type FIRST = H

impl<R> ColumnSelectorOne for ReceiptMask<R>

where R: Send + Sync + Debug + Decompress,

const MASK: usize = 0b1

type FIRST = R

impl<T> ColumnSelectorOne for TransactionMask<T>

where T: Send + Sync + Debug + Decompress,

const MASK: usize = 0b1

type FIRST = T