22 lines
733 B
Rust
22 lines
733 B
Rust
//! In certain situations, rust automatically inserts derefs as necessary: for
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//! example, field accesses `foo.bar` still work when `foo` is actually a
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//! reference to a type with the field `bar`. This is an approximation of the
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//! logic in rustc (which lives in librustc_typeck/check/autoderef.rs).
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use ra_syntax::algo::generate;
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use crate::HirDatabase;
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use super::Ty;
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impl Ty {
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/// Iterates over the possible derefs of `ty`.
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pub fn autoderef<'a>(self, db: &'a impl HirDatabase) -> impl Iterator<Item = Ty> + 'a {
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generate(Some(self), move |ty| ty.autoderef_step(db))
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}
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fn autoderef_step(&self, _db: &impl HirDatabase) -> Option<Ty> {
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// TODO Deref::deref
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self.builtin_deref()
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}
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}
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