31 lines
834 B
Rust
31 lines
834 B
Rust
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/// Create iterators for ast nodes where it only has to iterate over children
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macro_rules! simple_iter {
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($astnodetype:ty, $itertype:ident, $innertype:ty) => {
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pub struct $itertype<'r, 's> {
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next: $innertype,
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}
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impl<'r, 's> Iterator for $itertype<'r, 's> {
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type Item = AstNode<'r, 's>;
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fn next(&mut self) -> Option<Self::Item> {
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self.next.next().map(Into::<AstNode>::into)
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}
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}
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impl<'r, 's> IntoIterator for &'r $astnodetype {
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type Item = AstNode<'r, 's>;
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type IntoIter = $itertype<'r, 's>;
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fn into_iter(self) -> Self::IntoIter {
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$itertype {
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next: self.children.iter(),
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}
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}
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}
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};
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}
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pub(crate) use simple_iter;
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