Struct ExprProject 

pub struct ExprProject {
    pub base: Box<Expr>,
    pub projection: Projection,
}

Projects a field or element from a base expression.

A projection extracts a nested value from a record, tuple, or other composite type using a path of field indices.

Examples

project(record, [0])     // extracts the first field
project(record, [1, 2])  // extracts field 1, then field 2

Fields

base: Box<Expr>

The expression to project from.

projection: Projection

The path specifying which field(s) to extract.

Trait Implementations

impl Clone for ExprProject

fn clone(&self) -> ExprProject

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExprProject

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

Formats the value using the given formatter.

impl From<ExprProject> for Expr

fn from(value: ExprProject) -> Expr

Converts to this type from the input type.

impl PartialEq for ExprProject

fn eq(&self, other: &ExprProject) -> 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 StructuralPartialEq for ExprProject