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How do I prevent size_t from being interpreted as a reference?
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How do I prevent size_t from being interpreted as a reference?
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How can I change the signature of distanceTo(..) to make the compiler warn or error on a call with std::size_t as parameter?
class Point {
private:
float value;
public:
Point(float value) : value(value){};
float distanceTo(const Point &point) { return point.value - value; }
};
int main() {
std::size_t index = 1;
Point start(1);
Point end(4);
float dist = start.distanceTo(index); // compiles, but should not!
std::cout << dist;
return 0;
}
Make the constructor explicit:
explicit Point(float value) : value(value) {} // no semicolon here
This disallows implicit conversions (from size_t through float to Point), but note that it also makes code such as start.distanceTo(3.14) and Point p = 3.14; invalid.
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