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authorFlorian Diebold <[email protected]>2020-03-13 10:45:58 +0000
committerFlorian Diebold <[email protected]>2020-03-13 12:04:32 +0000
commitd6195fa21f09aa3f987e09d847c156e1788ec834 (patch)
treefda6b0e03da9ef7fc7426dbf785bd6c050e845dd /crates/ra_syntax/test_data
parent02b44006b8e37a8cd3f96d5b1c949d62e01be2e8 (diff)
Fix completion of HashMap::new
The `ty` function in code_model returned the type with placeholders for type parameters. That's nice for printing, but not good for completion, because placeholders won't unify with anything else: So the type we got for `HashMap` was `HashMap<K, V, T>`, which doesn't unify with `HashMap<?, ?, RandomState>`, so the `new` method wasn't shown. Now we instead return `HashMap<{unknown}, {unknown}, {unknown}>`, which does unify with the impl type. Maybe we should just expose this properly as variables though, i.e. we'd return something like `exists<type, type, type> HashMap<?0, ?1, ?2>` (in Chalk notation). It'll make the API more complicated, but harder to misuse. (And it would handle cases like `type TypeAlias<T> = HashMap<T, T>` more correctly.)
Diffstat (limited to 'crates/ra_syntax/test_data')
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