LANG.STRUCT.DECL.SAU : Specialization after Use

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CodeSonar^® 9.2p0

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C and C++

LANG.STRUCT.DECL.SAU : Specialization after Use

Summary

A template is fully or partially specialized after it has already been used.

Properties

Class Name

Specialization after Use

Significance

reliability

Mnemonic

LANG.STRUCT.DECL.SAU

Categories

JSF++	JSF++:104	A template specialization shall be declared before its use.

Availability

Available for C++ only (not C).

Enabling

Checks for this warning class are enabled by default. However, warning instances of this class that are issued as parser errors (rather than parser warnings) will be discarded when using factory configuration settings. To prevent these instances from being discarded, add the following WARNING_FILTER rule to the project configuration file.

WARNING_FILTER += allow class="Specialization after Use"

To disable checks for this warning class, add the following WARNING_FILTER rule to the project configuration file.

WARNING_FILTER += discard class="Specialization after Use"

Example

template <class T>
class List {
};

List<int *> intlist;

// This class declaration will cause an error in some compilers, such as C++17 compilers.
// We guard it with "#ifdef __CODESONAR__ ... #endif" so that it
// is preprocessed out by the native compiler (so the example can be compiled)
// but still observed by the CodeSonar analysis.
#ifdef __CODESONAR__
template <class T>
class List<T *> { // 'Specialization after Use' warning issued here
};
#endif

template <class T>
class Group {
};

template <class T>
class Group<T *> {             // ok: partial specialization occurs before use
};

Group<int *> intgroup;

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.

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