`A0-1-1`: initialization of constexpr used as NTTP is detected as useless assignment
Assessment
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Description
Affected rules
A0-1-1(useless assignment)
Description
Constant expression used as non-type template parameter (NTTP) produces useless-assignment false positive. It can be reproduced with integer NTTP.
Example
#include <ratio>
int main() {
constexpr int one = 1; // True positive, this one is indeed unused (therefore, assignment is useless).
constexpr int thirteen = 13; // False positive, used in the second argument:
// it can be verified that main returns 13.
std::ratio<1, thirteen> ratio;
return ratio.den;
}
Both definitions of one and thirteen are alerted as unused on query cpp/autosar/src/rules/A0-1-1/UselessAssignment.ql.
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