Struct MultiDeclSharedAxes 

pub struct MultiDeclSharedAxes { /* private fields */ }

Shared axes in a multi-declaration table prefix.

The final axis has a distinct semantic role: it is the row axis. Any axes before it are slice axes. This is intentionally not modeled as a generic NonEmpty<TableIndexSpec> because the tail element is special.

Implementations

impl MultiDeclSharedAxes

pub const fn new( slice_axes: Vec<TableIndexSpec>, row_axis: TableIndexSpec, ) -> Self

Construct shared axes from zero or more slice axes and the always-present row axis.

pub fn try_from_vec(axes: Vec<TableIndexSpec>) -> Result<Self, EmptyVecError>

Convert a parser-order vector into semantic slice/row axes.

Errors

Returns crate::syntax::non_empty::EmptyVecError when axes is empty.

pub fn slice_axes(&self) -> &[TableIndexSpec]

Slice axes preceding the row axis.

pub const fn row_axis(&self) -> &TableIndexSpec

The row axis.

pub const fn len(&self) -> usize

Number of shared axes. Always at least 1.

pub const fn is_empty(&self) -> bool

Returns false; provided for sequence-like callers.

pub fn iter(&self) -> impl Iterator<Item = &TableIndexSpec>

Iterate over axes in source order: slice axes first, then row axis.

Trait Implementations

impl Clone for MultiDeclSharedAxes

fn clone(&self) -> MultiDeclSharedAxes

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MultiDeclSharedAxes

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

Formats the value using the given formatter.

impl FormatEquivalent for MultiDeclSharedAxes

fn format_equivalent(&self, other: &Self) -> bool

Returns true if self and other are equivalent up to formatting.

impl Index<usize> for MultiDeclSharedAxes

type Output = TableIndexSpec

The returned type after indexing.

fn index(&self, index: usize) -> &Self::Output

Performs the indexing (container[index]) operation.