Fix redundant closure warnings in Rust 1.82 #4125
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May 12, 2025
...otlin/software/amazon/smithy/rust/codegen/server/smithy/generators/ServerBuilderGenerator.kt
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Problem
In Rust 1.82, the
#[allow(clippy::redundant_closure)]attribute is not functioning as intended, causing warnings that are elevated to errors in our build process. Specifically, when generating code in the form:Clippy still reports a redundant closure error despite the allow attribute.
Solution
This PR implements a temporary workaround until the Clippy issue is fixed. Instead of relying on the allow attribute, we now generate code that follows Clippy's recommendation by using function references directly:
For collection types like
VecandHashMap, we're using.unwrap_or_default()instead of closure-wrapped constructors.Implementation Details
Box::new,.into())Testing
The workaround will be revisited once the Clippy issue is resolved in a future Rust version.