022c0ce947
`NamedVarMap` is extremely similar to `ResolveBoundVars`. The former contains two `UnordMap<ItemLocalId, T>` fields (obscured behind `ItemLocalMap` typedefs). The latter contains two `SortedMap<ItemLocalId, T>` fields. We construct a `NamedVarMap` and then convert it into a `ResolveBoundVars` by sorting the `UnordMap`s, which is unnecessary busywork. This commit removes `NamedVarMap` and constructs a `ResolveBoundVars` directly. `SortedMap` and `NamedVarMap` have slightly different perf characteristics during construction (e.g. speed of insertion) but this code isn't hot enough for that to matter. A few details to note. - A `FIXME` comment is removed. - The detailed comments on the fields of `NamedVarMap` are copied to `ResolveBoundVars` (which has a single, incorrect comment). - `BoundVarContext::map` is renamed. - `ResolveBoundVars` gets a derived `Default` impl. |
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| .. | ||
| src | ||
| Cargo.toml | ||
| messages.ftl | ||
| README.md | ||
For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.