Struct ColumnSpecs

pub struct ColumnSpecs<'slice, 'spec> { /* private fields */ }

A view over specification of columns returned by the database.

Implementations

impl<'slice, 'spec> ColumnSpecs<'slice, 'spec>

pub fn new(specs: &'slice [ColumnSpec<'spec>]) -> Self

Creates new ColumnSpecs wrapper from a slice.

pub fn as_slice(&self) -> &'slice [ColumnSpec<'spec>]

Returns a slice of col specs encompassed by this struct.

pub fn len(&self) -> usize

Returns number of columns.

pub fn get_by_index(&self, k: usize) -> Option<&'slice ColumnSpec<'spec>>

Returns specification of k-th column returned from the database.

pub fn get_by_name( &self, name: &str, ) -> Option<(usize, &'slice ColumnSpec<'spec>)>

Returns specification of the column with given name returned from the database.

pub fn iter(&self) -> impl Iterator<Item = &'slice ColumnSpec<'spec>>

Returns iterator over specification of columns returned from the database, ordered by column order in the response.

Trait Implementations

impl<'slice, 'spec> Clone for ColumnSpecs<'slice, 'spec>

fn clone(&self) -> ColumnSpecs<'slice, 'spec>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'slice, 'spec> Debug for ColumnSpecs<'slice, 'spec>

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

Formats the value using the given formatter.

impl<'slice, 'spec> Copy for ColumnSpecs<'slice, 'spec>