Struct Arguments 

pub struct Arguments<'v, 'a>(/* private fields */);

Arguments object is passed from the starlark interpreter to function implementation when evaluation function or method calls.

Implementations

impl<'v, 'a> Arguments<'v, 'a>

pub fn names_map(&self) -> Result<SmallMap<StringValue<'v>, Value<'v>>>

Unwrap all named arguments (both explicit and in **kwargs) into a map.

This operation fails if named argument names are not unique.

pub fn len(&self) -> Result<usize>

The number of arguments, where those inside a args/kwargs are counted as multiple arguments.

This operation fails if the kwargs is not a dictionary, or args does not support len.

pub fn no_positional_args(&self, heap: &'v Heap) -> Result<()>

Produce Err if there are any positional arguments.

pub fn no_named_args(&self) -> Result<()>

Produce Err if there are any named (i.e. non-positional) arguments.

pub fn positional1(&self, heap: &'v Heap) -> Result<Value<'v>>

Collect 1 positional arguments from the Arguments, failing if there are too many/few arguments. Ignores named arguments.

Trait Implementations

impl<'v, 'a> Clone for Arguments<'v, 'a>

fn clone(&self) -> Arguments<'v, 'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'v, 'a> Default for Arguments<'v, 'a>

fn default() -> Arguments<'v, 'a>

Returns the “default value” for a type.

impl<'v, 'a> Dupe for Arguments<'v, 'a>

fn dupe(&self) -> Self