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7cdeac5773
The lint used to check for patterns looking like:
```rs
for (_, x) in some_iter.enumerate() {
// Index is ignored
}
```
This commit further checks for chained method calls constructs where we
can detect that the index is unused. Currently, this checks only for the
following patterns:
```rs
some_iter.enumerate().map_function(|(_, x)| ..)
let x = some_iter.enumerate();
x.map_function(|(_, x)| ..)
```
where `map_function` is one of `all`, `any`, `filter_map`, `find_map`,
`flat_map`, `for_each` or `map`.
Fixes #12411.
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|---|---|---|
| .. | ||
| test_utils | ||
| ui | ||
| ui-cargo | ||
| ui-internal | ||
| ui-toml | ||
| workspace_test | ||
| check-fmt.rs | ||
| clippy.toml | ||
| compile-test.rs | ||
| dogfood.rs | ||
| headers.rs | ||
| integration.rs | ||
| lint_message_convention.rs | ||
| missing-test-files.rs | ||
| versioncheck.rs | ||
| workspace.rs | ||