Struct starlark::values::tuple::TupleRef

pub struct TupleRef<'v> { /* private fields */ }

Reference to tuple data in Starlark heap.

Implementations

impl<'v> TupleRef<'v>

pub const TYPE: &'static str = FrozenTupleRef::TYPE

type(()), which is "tuple".

pub fn from_value(value: Value<'v>) -> Option<&'v TupleRef<'v>>

Downcast a value to a tuple.

pub fn from_frozen_value(value: FrozenValue) -> Option<&'v TupleRef<'v>>

Downcast a value to a tuple.

pub fn len(&self) -> usize

Number of elements.

pub fn content(&self) -> &[Value<'v>]

Tuple elements.

pub fn iter(&self) -> impl ExactSizeIterator<Item = Value<'v>> + '_

Iterate over the contents.

Trait Implementations

impl<'v> Debug for TupleRef<'v>

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

Formats the value using the given formatter.

impl<'v> StarlarkTypeRepr for &'v TupleRef<'v>

fn starlark_type_repr() -> Ty

The representation of a type that a user would use verbatim in starlark type annotations

impl<'v> UnpackValue<'v> for &'v TupleRef<'v>

fn unpack_value(value: Value<'v>) -> Option<Self>

Given a Value, try and unpack it into the given type, which may involve some element of conversion.

fn expected() -> String

Description of values acceptable by unpack_value, e. g. list or str.

fn unpack_value_err(value: Value<'v>) -> Result<Self>

Unpack a value, but return error instead of None if unpacking fails.

fn unpack_param(value: Value<'v>) -> Result<Self>

Unpack value, but instead of None return error about incorrect argument type.

fn unpack_named_param(value: Value<'v>, param_name: &str) -> Result<Self>

Unpack value, but instead of None return error about incorrect named argument type.

impl<'v> Coerce<[Value<'v>]> for TupleRef<'v>

impl<'v> Coerce<TupleRef<'v>> for [Value<'v>]