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This has nothing to do with CTR as a group, and everything to do with the algorithmic requirements of the STL. However, I cannot think of a better place for this rule to live (aside from MSC, and I think CTR is an improvement). If we wind up with an STL category, this should probably go there. |
The C++ Standard Library standard library implements numerous common algorithms that accept a predicate function object. The C++ Standard, [algorithms.general], paragraph 10 , states [ISO/IEC 14882-2014], states :
[Note: Unless otherwise specified, algorithms that take function objects as arguments are permitted to copy those function objects freely. Programmers for whom object identity is important should consider using a wrapper class that points to a noncopied implementation object such as
reference_wrapper<T>, or some equivalent solution. — end note]
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Rule | Severity | Likelihood | Remediation Cost | Priority | Level |
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CTR58-CPP | Low | Likely | High | P3 | L3 |
Automated Detection
Tool | Version | Checker | Description |
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| [ISO/IEC 14882-2014] | 25.1, "General" |
| [Meyers 01] | Item 39: "Make Predicates Pure Functions", Make predicates pure functions |
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