carbon-lang/toolchain/parse/testdata/generics/interface/fail_no_impl_allowed.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

interface Foo {
  // CHECK:STDERR: fail_no_impl_allowed.carbon:[[@LINE+3]]:39: ERROR: Method implementations are not allowed in interfaces.
  // CHECK:STDERR:   fn Add[self: Self](b: Self) -> Self {
  // CHECK:STDERR:                                       ^
  fn Add[self: Self](b: Self) -> Self {
    print("You can't do that.");
  }
}

// CHECK:STDOUT: - filename: fail_no_impl_allowed.carbon
// CHECK:STDOUT:   parse_tree: [
// CHECK:STDOUT:     {kind: 'FileStart', text: ''},
// CHECK:STDOUT:         {kind: 'InterfaceIntroducer', text: 'interface'},
// CHECK:STDOUT:         {kind: 'Name', text: 'Foo'},
// CHECK:STDOUT:       {kind: 'InterfaceDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT:         {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT:         {kind: 'Name', text: 'Add'},
// CHECK:STDOUT:           {kind: 'DeducedParameterListStart', text: '['},
// CHECK:STDOUT:             {kind: 'SelfValueName', text: 'self'},
// CHECK:STDOUT:             {kind: 'SelfTypeNameExpression', text: 'Self'},
// CHECK:STDOUT:           {kind: 'PatternBinding', text: ':', subtree_size: 3},
// CHECK:STDOUT:         {kind: 'DeducedParameterList', text: ']', subtree_size: 5},
// CHECK:STDOUT:           {kind: 'ParameterListStart', text: '('},
// CHECK:STDOUT:             {kind: 'Name', text: 'b'},
// CHECK:STDOUT:             {kind: 'SelfTypeNameExpression', text: 'Self'},
// CHECK:STDOUT:           {kind: 'PatternBinding', text: ':', subtree_size: 3},
// CHECK:STDOUT:         {kind: 'ParameterList', text: ')', subtree_size: 5},
// CHECK:STDOUT:           {kind: 'SelfTypeNameExpression', text: 'Self'},
// CHECK:STDOUT:         {kind: 'ReturnType', text: '->', subtree_size: 2},
// CHECK:STDOUT:       {kind: 'FunctionDeclaration', text: 'fn', has_error: yes, subtree_size: 15},
// CHECK:STDOUT:     {kind: 'InterfaceDefinition', text: '}', subtree_size: 19},
// CHECK:STDOUT:     {kind: 'FileEnd', text: ''},
// CHECK:STDOUT:   ]