Struct ExpressionI

pub struct ExpressionI(pub usize);

An ExpressionI represents an index into Slab.ps.exprs.

It behaves much like a pointer or reference, but it is ‘safe’ (unlike a raw pointer) and is not managed by the Rust borrow checker (unlike a reference).

Tuple Fields

0: usize

Implementations

impl ExpressionI

pub fn from(self, ps: &ParseSlab) -> &Expression

Gets an Expression reference from the ParseSlab.

This is actually just a convenience function built on top of ParseSlab.get_expr, but it enables you to perform the entire parse/compile/eval process in one line without upsetting the Rust borrow checker. (If you didn’t have this function, the borrow checker would force you to split the process into at least two lines.)

Trait Implementations

impl Clone for ExpressionI

fn clone(&self) -> ExpressionI

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ExpressionI

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

Formats the value using the given formatter.

impl PartialEq for ExpressionI

fn eq(&self, other: &ExpressionI) -> 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 Copy for ExpressionI

impl StructuralPartialEq for ExpressionI