Struct ColumnIndex 

pub struct ColumnIndex(/* private fields */);

A SQLite column index, used for reading values out of queried rows.

Implementations

impl ColumnIndex

pub const INITIAL: Self

The first numbered column index (0).

let first = ColumnIndex::INITIAL;
assert_eq!(usize::from(first), 0);

pub const fn new(value: c_int) -> Self

pub const fn value(&self) -> c_int

Access the underlying SQLite column index as a C int.

pub const fn next(&self) -> Self

Add 1 to this column index.

let first = ColumnIndex::INITIAL;
assert_eq!(usize::from(first), 0);

let second = first.next();
assert_eq!(usize::from(second), 1);

Trait Implementations

impl Clone for ColumnIndex

fn clone(&self) -> ColumnIndex

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ColumnIndex

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<ColumnIndex> for i32

fn from(index: ColumnIndex) -> Self

Converts to this type from the input type.

impl From<ColumnIndex> for i64

fn from(index: ColumnIndex) -> Self

Converts to this type from the input type.

impl From<ColumnIndex> for isize

fn from(index: ColumnIndex) -> Self

Converts to this type from the input type.

impl From<ColumnIndex> for u32

fn from(index: ColumnIndex) -> Self

Converts to this type from the input type.

impl From<ColumnIndex> for u64

fn from(index: ColumnIndex) -> Self

Converts to this type from the input type.

impl From<ColumnIndex> for usize

fn from(index: ColumnIndex) -> Self

Converts to this type from the input type.

impl Ord for ColumnIndex

fn cmp(&self, other: &ColumnIndex) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ColumnIndex

fn eq(&self, other: &ColumnIndex) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for ColumnIndex

fn partial_cmp(&self, other: &ColumnIndex) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl TryFrom<i32> for ColumnIndex

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: i32) -> Result<Self>

Performs the conversion.

impl TryFrom<i64> for ColumnIndex

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: i64) -> Result<Self>

Performs the conversion.

impl TryFrom<isize> for ColumnIndex

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: isize) -> Result<Self>

Performs the conversion.

impl TryFrom<u32> for ColumnIndex

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: u32) -> Result<Self>

Performs the conversion.

impl TryFrom<u64> for ColumnIndex

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: u64) -> Result<Self>

Performs the conversion.

impl TryFrom<usize> for ColumnIndex

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: usize) -> Result<Self>

Performs the conversion.

impl Copy for ColumnIndex

impl Eq for ColumnIndex

impl StructuralPartialEq for ColumnIndex