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Variable `std.typecons.Tuple.expand`

Use t.expand for a Tuple t to expand it into its components. The result of expand acts as if the Tuple's components were listed as a list of values. (Ordinarily, a Tuple acts as a single value.)


						
				struct Tuple
				

				
					{
					

				
				  // ...
				

				  Tuple.Types expand
				;
				

				  // ...
				

				}

Example

auto t1 = tuple(1, " hello ", 'a');
writeln(t1.toString()); // `Tuple!(int, string, char)(1, " hello ", 'a')`

void takeSeveralTypes(int n, string s, bool b)
{
    assert(n == 4 && s == "test" && b == false);
}

auto t2 = tuple(4, "test", false);
//t.expand acting as a list of values
takeSeveralTypes(t2.expand);

Authors

Andrei Alexandrescu, Bartosz Milewski, Don Clugston, Shin Fujishiro, Kenji Hara

License

Boost License 1.0.