Struct r::callable::primitive::PrimitiveLength

pub struct PrimitiveLength;

Get an Object’s Length

Calculate the length of an object.

In-Language

Usage

length(x)

Arguments

x: An object whose length to calculate.

Examples

length([1, 2, 3])

Trait Implementations

impl Builtin for PrimitiveLength

fn kind(&self) -> SymKind

fn is_transparent(&self) -> bool

fn is_infix(&self) -> bool

impl Callable for PrimitiveLength

fn call_matched( &self, args: List, _ellipsis: List, stack: &mut CallStack, ) -> EvalResult

fn match_args( &self, args: List, stack: &mut CallStack, ) -> Result<(List, List), Signal>

fn match_arg_exprs( &self, args: ExprList, stack: &mut CallStack, ) -> Result<(List, List), Signal>

fn call(&self, args: ExprList, stack: &mut CallStack) -> EvalResult

fn call_mut(&self, args: ExprList, stack: &mut CallStack) -> EvalResult

fn call_assign( &self, value: Expr, args: ExprList, stack: &mut CallStack, ) -> EvalResult

impl CallableClone for PrimitiveLength

where Self: Callable,

fn callable_clone(&self) -> Box<dyn Builtin>

impl CallableFormals for PrimitiveLength

fn formals(&self) -> ExprList

impl Clone for PrimitiveLength

fn clone(&self) -> PrimitiveLength

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PrimitiveLength

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

Formats the value using the given formatter.

impl PartialEq for PrimitiveLength

fn eq(&self, other: &PrimitiveLength) -> 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 Sym for PrimitiveLength

const SYM: &'static str = "length"

const KIND: &'static SymKind = _

impl StructuralPartialEq for PrimitiveLength