Struct ArgumentSetSelector 

pub struct ArgumentSetSelector<Field>(/* private fields */);

Available on crate feature parse2 only.

Helper type that allows us to select an impl of ArgumentSetMethods

For use by macros.

See the module-level docs, and Field type in ItemValueParseable.

Example

The code in the (derive) macro output is roughly like this:

use tor_netdoc::parse2::multiplicity::{ArgumentSetSelector, ArgumentSetMethods as _};
use tor_netdoc::parse2::ItemStream;
let doc = "intro-item 12 66\n";
let mut items = ItemStream::new(doc).unwrap();
let mut item = items.next().unwrap().unwrap();

let args = ArgumentSetSelector::<Vec<i32>>::default()
    .parse(item.args_mut(), "number")
    .unwrap();
assert_eq!(args, [12, 66]);

Trait Implementations

impl<T: ItemArgumentParseable> ArgumentSetMethods for &ArgumentSetSelector<T>

type Field = T

The output type: the type of the field in the Item struct.

fn parse<'s>( self, args: &mut ArgumentStream<'s>, f: &'static str, ) -> Result<T, EP>

Parse zero or more argument(s) into Self::Field.

impl<T: ItemArgumentParseable> ArgumentSetMethods for ArgumentSetSelector<Option<T>>

type Field = Option<T>

The output type: the type of the field in the Item struct.

fn parse<'s>( self, args: &mut ArgumentStream<'s>, f: &'static str, ) -> Result<Option<T>, EP>

Parse zero or more argument(s) into Self::Field.

impl<T: ItemArgumentParseable> ArgumentSetMethods for ArgumentSetSelector<Vec<T>>

type Field = Vec<T>

The output type: the type of the field in the Item struct.

fn parse<'s>( self, args: &mut ArgumentStream<'s>, f: &'static str, ) -> Result<Vec<T>, EP>

Parse zero or more argument(s) into Self::Field.

impl<Field> Clone for ArgumentSetSelector<Field>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<Field> Default for ArgumentSetSelector<Field>

fn default() -> Self

Returns the “default value” for a type.

impl<Field> Copy for ArgumentSetSelector<Field>