Trait OffsetType

pub trait OffsetType:
    Copy
    + Default
    + PartialOrd
    + Sub<Output = Self> {
    const SIZE: usize;

    // Required methods
    fn from_usize(value: usize) -> Option<Self>;
    fn to_usize(self) -> usize;
}

Trait for offset types used in StringTape.

This trait defines the interface for offset types that can be used to index into the string data buffer. Implementations are provided for i32 and i64 to match Apache Arrow’s String and LargeString array types.

Required Associated Constants

const SIZE: usize

Size of the offset type in bytes.

Required Methods

fn from_usize(value: usize) -> Option<Self>

Convert a usize value to this offset type.

Returns None if the value is too large to be represented by this offset type.

fn to_usize(self) -> usize

Convert this offset value to usize.

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.

Implementations on Foreign Types

impl OffsetType for i32

const SIZE: usize = 4usize

fn from_usize(value: usize) -> Option<Self>

fn to_usize(self) -> usize

impl OffsetType for i64

const SIZE: usize = 8usize

fn from_usize(value: usize) -> Option<Self>

fn to_usize(self) -> usize

Implementors