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| Operator | Context |
|---|---|
if | Controlling expression |
while | Controlling expression |
do ... while | Controlling expression |
for | Second operand |
?: | First operand |
?: | Second or third operands, where the ternary expression is used in any of these contexts |
&& | Either operand |
|| | either operand |
, | Second operand, when the comma expression is used in any of these contexts |
Performing assignment statements in other contexts do not violate this rule. However, they may violate other rules, such as EXP30-C. Do not depend on the order of evaluation for side effects.
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Tool | Version | Checker | Description | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Astrée |
| assignment-conditional | Fully checked | |||||||||||||||||
| Axivion Bauhaus Suite |
| CertC-EXP45 | ||||||||||||||||||
| Clang |
| -Wparentheses | Can detect some instances of this rule, but does not detect all | |||||||||||||||||
| CodeSonar |
| LANG.STRUCT.CONDASSIG LANG.STRUCT.SE.COND LANG.STRUCT.USEASSIGN | Assignment in conditional Condition contains side effects Assignment result in expression | |||||||||||||||||
| Compass/ROSE | Could detect violations of this recommendation by identifying any assignment expression as the top-level expression in an | |||||||||||||||||||
| Cppcheck Premium |
| premium-cert-exp45-c | Partially implemented | |||||||||||||||||
| CC2.EXP18 | Fully implemented | ||||||||||||||||||
| GCC |
| Can detect violations of this recommendation when the | ||||||||||||||||||
| Helix QAC |
| C3314, C3326, C3344, C3416 C++4071, C++4074 | ||||||||||||||||||
| Klocwork |
| ASSIGCOND.CALL | ||||||||||||||||||
| LDRA tool suite |
| 114 S, 132 S | Enhanced Enforcement | |||||||||||||||||
| Parasoft C/C++test |
| CERT_C-EXP45-aCERT_C-EXP45-b | cd | Avoid conditions that always evaluate to the same valueAssignment operators shall not be used in conditions without brackets | A function identifier shall only be used with either a preceding '&', or with a parenthesised parameter list, which may be emptyAssignment operators shall not be used in expressions that yield a Boolean value | |||||||||||||||
| PC-lint Plus |
| 720 | Partially supported: reports Boolean test of unparenthesized assignment | |||||||||||||||||
| Polyspace Bug Finder |
| CERT C: Rule EXP45-C | Checks for invalid use of = (assignment) operator (rule | partially covered)PRQA QA-C | ||||||||||||||||
| Include Page | PRQA QA-C_v | PRQA QA-C_v | 3314, 3326, 3344, 3416 | Partially implemented | PRQA QA-C++ | | Include Page | | cplusplus:PRQA QA-C++_V | cplusplus:PRQA QA-C++_V | 4071, 4074 fully covered)|||||||||||
| PVS-Studio |
| V559, V633, V699 | ||||||||||||||||||
| RuleChecker |
| assignment-conditional | Fully checked | |||||||||||||||||
| SonarQube C/C++ Plugin |
| AssignmentInSubExpression |
Related Vulnerabilities
Search for vulnerabilities resulting from the violation of this rule on the CERT website.
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