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", so this trait is not object safe.

Implementors

impl ColumnSelectorOne for BlockHashMask

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

const MASK: usize = 4usize

type FIRST = FixedBytes<32>

impl ColumnSelectorOne for TotalDifficultyMask

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

const MASK: usize = 2usize

type FIRST = <HeaderTerminalDifficulties as Table>::Value

impl<H> ColumnSelectorOne for HeaderMask<H>

where H: Send + Sync + Debug + Decompress,

const MASK: usize = 1usize

type FIRST = H

impl<R> ColumnSelectorOne for ReceiptMask<R>

where R: Send + Sync + Debug + Decompress,

const MASK: usize = 1usize

type FIRST = R

impl<T> ColumnSelectorOne for TransactionMask<T>

where T: Send + Sync + Debug + Decompress,

const MASK: usize = 1usize

type FIRST = T