Struct starlark::eval::ParametersParser

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

Parse a series of parameters which were specified by ParametersSpec.

This is usually created with ParametersSpec::parser.

Implementations

impl<'v, 'a> ParametersParser<'v, 'a>

pub fn new(slots: &'a [Cell<Option<Value<'v>>>]) -> Self

Create a parameter parser, which stored parameters into provided slots reference.

pub fn next_opt<T: UnpackValue<'v>>(&mut self, name: &str) -> Result<Option<T>>

Obtain the next parameter, corresponding to ParametersSpecBuilder::optional. It is an error to request more parameters than were specified. The name is only used for error messages.

pub fn next<T: UnpackValue<'v>>(&mut self, name: &str) -> Result<T>

Obtain the next parameter, which can’t be defined by ParametersSpecBuilder::optional. It is an error to request more parameters than were specified. The name is only used for error messages.