not

Inverts a constraint

struct not(OtherConstraint)
struct not(alias otherConstraint)
@safe
@constraint
struct not (
alias otherConstraint
) {
bool check(T actual);
string errorMessage();
}

Members

Functions

check bool check(T actual): Undocumented in source. Be warned that the author may not have intended to support it.
errorMessage string errorMessage(): Undocumented in source. Be warned that the author may not have intended to support it.

Examples

struct Data
{
    @not!notNaN // <-- must be NaN
    float value = float.nan;
}

struct Data
{
    @not!notNegative // <-- must *not* be non-negative
    int value;
}

Meta

Source

See Implementation