carbon-lang/explorer/testdata/impl/generic_method_impl.carbon

// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// AUTOUPDATE
// RUN: %{explorer-run}
// RUN: %{explorer-run-trace}
// CHECK:STDOUT: result: 3

package ExplorerTest api;

class Cell(T:! type) {
  fn Create(x: T) -> Cell(T) { return { .data = x }; }

  fn Get[self: Self]() -> T {
    return self.data;
  }
  fn Put[addr self: Self*](x: T) {
    (*self).data = x;
  }
  fn Update[addr self: Self*, U:! ImplicitAs(T)](x: U) {
    (*self).data = x;
  }
  fn CreateOther[self: Self, U:! type](x: U) -> Cell(U) {
    return {.data = x};
  }
  var data: T;
}

class Integer {
  var int: i32;
}

fn Main() -> i32 {
  var i: Integer = {.int = 1};
  var c: Cell(Integer) = Cell(Integer).Create(i); // c contains 1
  i = {.int = 2};
  var j: Integer = c.Get(); // j == 1
  c.Put(i);    // c contains 2
  c.Update(j); // c contains 1
  var d: Cell(Integer) = c.CreateOther(i); // d contains 2
  return c.data.int + d.data.int;
}