carbon-lang/explorer/testdata/impl/deducible_parameter.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: 1

package ExplorerTest api;

interface A(T:! type) {}
interface B {
  fn F() -> i32;
}

class C(T:! type) {}

external impl forall [T:! type] C(T) as A(T) & B {
  fn F() -> i32 { return 1; }
}

fn Main() -> i32 {
  var v: C(i32) = {};
  return v.(B.F)();
}