`RULE-11-9`: Consider more types of assignment

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難度
4/5
預估耗時
3-5 天
新手友好度
38/100
Issue 類型
功能
描述清晰度
基本清楚
活躍度
停滯
技術堆疊
cpp
領域
devtools

研究方向

未指定實作檔案或測試。首先定位 RULE-11-9 查詢並追蹤指派的表示方式，然後將其與 issue 中列出的四種指派操作進行比較。當規則對這些操作的涵蓋範圍得到定義和驗證（包括任何受影響的規則）時，即可完成。

由索引模型根據 Issue 內容生成。

描述

Difficulty-Low false positive/false negative Impact-Medium Standard-MISRA-C
Affected rules
  • RULE-11-9
Description

Rule 11.9 prohibits the use of 0 as a null pointer constant when assigning to a pointer. However, we do not capture all the types of assignments. The Glossary (Appendix J) states:

Assigned

An expression is assigned if it is the subject of an assignment.

Assignment

It is sometimes convenient to use the term assignment to denote any operation which takes place as if it were by assignment. The operations covered by this term are:
• Assignment by means of one of the assignment operators;
• Passing an argument to a function, in which case the argument is copied as if by assignment to the corresponding parameter;
• Returning an expression from a function, in which case the result is copied as if by assignment to an object with the function’s return type;
• Using an expression to initialize all or part of an object, including a compound literal in C99, in which case the expression is copied as if by assignment to the destination.

This may also impact other MISRA rules that refer to the term assignment or assigned.

Example
void* myfunc() {
  return 0; // NON_COMPLIANT
}
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CodeQL
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6 天 7 小時
30 天內合併 PR
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