Create rule S7200: Avoid resizing a vector to zero using vec.resize(0, value)
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* AWS blog - https://aws.amazon.com/blogs
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* Azure Documentation - https://learn.microsoft.com/en-us/azure/?product=popular
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* CERT - https://wiki.sei.cmu.edu/confluence/display/seccode
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* Clippy Lints - https://rust-lang.github.io/rust-clippy/master/index.html
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* {cpp} reference - https://en.cppreference.com/w/
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* {cpp} Core Guidelines - https://github.com/isocpp/CppCoreGuidelines/blob/e49158a/CppCoreGuidelines.md
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* CVE - https://cve.mitre.org
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rules/S7200/metadata.json
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rules/S7200/metadata.json
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{
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}
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rules/S7200/rust/metadata.json
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rules/S7200/rust/metadata.json
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{
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"title": "Avoid resizing a vector to zero using `vec.resize(0, value)`",
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"type": "BUG",
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"status": "ready",
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"remediation": {
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"func": "Constant\/Issue",
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"constantCost": "5min"
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},
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"tags": [
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"clippy"
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],
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"defaultSeverity": "Major",
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"ruleSpecification": "RSPEC-7200",
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"sqKey": "S7200",
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"scope": "All",
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"defaultQualityProfiles": ["Sonar way"],
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"quickfix": "unknown",
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"code": {
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"impacts": {
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"MAINTAINABILITY": "LOW"
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},
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"attribute": "CLEAR"
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}
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}
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rules/S7200/rust/rule.adoc
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rules/S7200/rust/rule.adoc
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== Why is this an issue?
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Resizing a vector to zero using `vec.resize(0, value)` is misleading. It's either unreadable if the intent was simply to clear the vector, making the code harder to understand, or suspicious and unintentional if a resize was actually expected, but the arguments were accidentally swapped.
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== How to fix it
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Replace `vec.resize(0, value)` with `vec.clear()`, or swap the `vec.resize` arguments.
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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 vec = vec![1, 2, 3, 4, 5];
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vec.resize(0, 5); // Noncompliant: Resizing the vector to 0.
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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 mut vec = vec![1, 2, 3, 4, 5];
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vec.clear(); // Compliant: Clear the vector.
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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_resize_to_zero
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