Philipp Krones c2922d1213 Make collapsible_if recognize the let_chains feature (#14481) ...

Until `if let` chains are stabilized, we do not collapse them together
or with other `if` expressions unless the `let_chains` feature is
enabled. This is the case for example in Clippy sources.

This was made possible by converting the `collapsible_if` to a late lint
to get access to the set of enabled features. This allows this PR to
supersede #14455 and no longer require an additional configuration
option.

The three commits are, in order:
- a conversion of the existing early lint to a late lint, with no new
feature or tests changes
- the addition of the `let_chains` feature detection and action, and
tests
- the application of the enhanced lint to Clippy sources (136 files
modified)

changelog: [`collapsible_if`]: recognize the rust compiler `let_chains`
feature

r? @flip1995

2025-03-28 09:17:24 +00:00

..

test_utils

…

ui

Make collapsible_if recognize the let_chains feature (#14481)

2025-03-28 09:17:24 +00:00

ui-cargo

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ui-internal

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ui-toml

Make collapsible_if recognize the let_chains feature (#14481)

2025-03-28 09:17:24 +00:00

workspace_test

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check-fmt.rs

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clippy.toml

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compile-test.rs

Apply collapsible_if to Clippy itself

2025-03-27 14:40:44 +01:00

config-metadata.rs

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dogfood.rs

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headers.rs

…

integration.rs

…

lint_message_convention.rs

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missing-test-files.rs

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versioncheck.rs

…

workspace.rs

…