rune/runtime/
iterator.rs

1use crate::alloc;
2use crate::compile::meta;
3
4use super::{FromValue, MaybeTypeOf, RuntimeError, Value, VmError};
5
6/// An owning iterator.
7#[derive(Debug)]
8pub struct Iterator {
9    iter: Value,
10}
11
12impl Iterator {
13    pub(crate) fn new(iter: Value) -> Self {
14        Self { iter }
15    }
16
17    #[inline]
18    pub(crate) fn size_hint(&self) -> Result<(usize, Option<usize>), VmError> {
19        self.iter.protocol_size_hint()
20    }
21
22    #[inline]
23    pub(crate) fn next(&mut self) -> Result<Option<Value>, VmError> {
24        self.iter.protocol_next()
25    }
26}
27
28impl FromValue for Iterator {
29    #[inline]
30    fn from_value(value: Value) -> Result<Self, RuntimeError> {
31        value.into_iter().map_err(RuntimeError::from)
32    }
33}
34
35impl MaybeTypeOf for Iterator {
36    #[inline]
37    fn maybe_type_of() -> alloc::Result<meta::DocType> {
38        Ok(meta::DocType::empty())
39    }
40}
rune/runtime/iterator.rs

rune/runtime/
iterator.rs
