Generics - language feature

Example from 1 languages: Java

List<String> v = new ArrayList<String>();
v.add("test");
Integer i = v.get(0); // (type error)  compilation-time error

Example from 1 languages: TypeScript

function identity<T>(arg: T): T {
   return arg;
}

Example from 1 languages: C#

// Declare the generic class.
public class GenericList<T>
{
    public void Add(T input) { }
}
class TestGenericList
{
    private class ExampleClass { }
    static void Main()
    {
        // Declare a list of type int.
        GenericList<int> list1 = new GenericList<int>();
        list1.Add(1);

        // Declare a list of type string.
        GenericList<string> list2 = new GenericList<string>();
        list2.Add("");

        // Declare a list of type ExampleClass.
        GenericList<ExampleClass> list3 = new GenericList<ExampleClass>();
        list3.Add(new ExampleClass());
    }
}

Example from 1 languages: Ada

generic
   Max_Size : Natural; -- a generic formal value
   type Element_Type is private; -- a generic formal type; accepts any nonlimited type
package Stacks is
   type Size_Type is range 0 .. Max_Size;
   type Stack is limited private;
   procedure Create (S : out Stack;
                     Initial_Size : in Size_Type := Max_Size);
   procedure Push (Into : in out Stack; Element : in Element_Type);
   procedure Pop (From : in out Stack; Element : out Element_Type);
   Overflow : exception;
   Underflow : exception;
private
   subtype Index_Type is Size_Type range 1 .. Max_Size;
   type Vector is array (Index_Type range <>) of Element_Type;
   type Stack (Allocated_Size : Size_Type := 0) is record
      Top : Index_Type;
      Storage : Vector (1 .. Allocated_Size);
   end record;
end Stacks;

Example from 1 languages: Felix

// generics
fun g (x) => f (f x);
println$ g 1, g "hello";
println$ _map f (1,"hello",2.0);

Example from 1 languages: Jule

fn generic_function[T](s: []T) {
    // ...
}

Languages with Generics include Java, TypeScript, C#, Ada, Chapel, Felix, Jule

Languages without Generics include progsbase

View all concepts with or missing a hasGenerics measurement