90a9b01d26
* Add rust to rule S7089 * Update RSPEC --------- Co-authored-by: yassin-kammoun-sonarsource <yassin-kammoun-sonarsource@users.noreply.github.com> Co-authored-by: yassin-kammoun-sonarsource <yassin.kammoun@sonarsource.com>
35 lines
854 B
Plaintext
35 lines
854 B
Plaintext
== Why is this an issue?
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Initializing a vector with a chain of ``++push++`` invocations is less efficient than making the initialization with a single vector literal. Each invocation has a cost in itself.
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On top of the performance argument, the vector literal is more concise and easier to read.
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== How to fix it
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Introduce a single vector literal that includes all the elements that are added to the vector as arguments of the ``++push++`` invocations.
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=== Code examples
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==== Noncompliant code example
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[source,rust,diff-id=1,diff-type=noncompliant]
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----
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let mut v = Vec::new();
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v.push(0);
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v.push(1);
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v.push(2);
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----
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==== Compliant solution
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[source,rust,diff-id=1,diff-type=compliant]
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----
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let v = vec![0, 1, 2];
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----
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== Resources
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=== Documentation
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* Clippy Lints - https://rust-lang.github.io/rust-clippy/master/index.html#vec_init_then_push
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