hasField - multiple declarations
Function hasField
Returns true if a field can be found on aggregate with the given fieldName, false otherwise.
auto hasField(alias aggregate, string fieldName)() pure nothrow @safe
if (isAggregate!aggregate || isModule!aggregate);
Example
struct S {
long id;
int age;
string name() {
return "name";
}
}
hasField!(S, "id"); // returns true
hasField!(S, "name"); // returns false
Function hasField
Returns true if a field can be found on aggregate filtered with the given predicate, false otherwise.
auto hasField(alias aggregate, alias predicate)() pure nothrow @safe
if ((isAggregate!aggregate || isModule!aggregate) && is(typeof(unaryFun!predicate)));
Example
struct S {
long id;
int age;
string name() {
return "name";
}
}
hasField!(S, field => isNumeric!(field .type)); // returns true
hasField!(S, field => is(field .type == string)); // returns false