// 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
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/where_expr/designator.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/where_expr/designator.carbon

// --- success.carbon

library "[[@TEST_NAME]]";

interface I {
  let Member:! type;
}

fn PeriodSelf(T:! I where .Self == ());

fn PeriodMember(U:! I where .Member == ());

fn TypeSelfImpls(V:! type where .Self impls I);

// --- fail_wrong_member.carbon

library "[[@TEST_NAME]]";

interface J {
  let Member:! type;
}

// CHECK:STDERR: fail_wrong_member.carbon:[[@LINE+4]]:31: error: member name `Mismatch` not found in `J` [MemberNameNotFoundInScope]
// CHECK:STDERR: fn PeriodMismatch(W:! J where .Mismatch = {});
// CHECK:STDERR:                               ^~~~~~~~~
// CHECK:STDERR:
fn PeriodMismatch(W:! J where .Mismatch = {});

// --- fail_designator_matches_var.carbon

library "[[@TEST_NAME]]";

fn Foo() -> () {
  var x: ();
  // CHECK:STDERR: fail_designator_matches_var.carbon:[[@LINE+5]]:10: error: name `.Self` not found [NameNotFound]
  // CHECK:STDERR:   return .x;
  // CHECK:STDERR:          ^~
  // CHECK:STDERR: fail_designator_matches_var.carbon: note: designator may only be used when `.Self` is in scope [NoPeriodSelfForDesignator]
  // CHECK:STDERR:
  return .x;
}

// --- fail_unknown_designator.carbon

library "[[@TEST_NAME]]";

fn Bar() -> () {
  // CHECK:STDERR: fail_unknown_designator.carbon:[[@LINE+5]]:10: error: name `.Self` not found [NameNotFound]
  // CHECK:STDERR:   return .undef;
  // CHECK:STDERR:          ^~~~~~
  // CHECK:STDERR: fail_unknown_designator.carbon: note: designator may only be used when `.Self` is in scope [NoPeriodSelfForDesignator]
  // CHECK:STDERR:
  return .undef;
}

// --- fail_dot_self_method_return_value.carbon

library "[[@TEST_NAME]]";

class C {
  // CHECK:STDERR: fail_dot_self_method_return_value.carbon:[[@LINE+4]]:27: error: name `.Self` not found [NameNotFound]
  // CHECK:STDERR:   fn F() -> Self { return .Self; }
  // CHECK:STDERR:                           ^~~~~
  // CHECK:STDERR:
  fn F() -> Self { return .Self; }
}

// --- fail_dot_self_method_return_type.carbon

library "[[@TEST_NAME]]";

class D {
  // CHECK:STDERR: fail_dot_self_method_return_type.carbon:[[@LINE+4]]:13: error: name `.Self` not found [NameNotFound]
  // CHECK:STDERR:   fn G() -> .Self { return Self; }
  // CHECK:STDERR:             ^~~~~
  // CHECK:STDERR:
  fn G() -> .Self { return Self; }
}

// CHECK:STDOUT: --- success.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %I.type: type = facet_type <@I> [template]
// CHECK:STDOUT:   %Self: %I.type = bind_symbolic_name Self, 0 [symbolic]
// CHECK:STDOUT:   %I.assoc_type: type = assoc_entity_type %I.type [template]
// CHECK:STDOUT:   %assoc0: %I.assoc_type = assoc_entity element0, @I.%Member [template]
// CHECK:STDOUT:   %.Self.258: %I.type = bind_symbolic_name .Self [symbolic]
// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [template]
// CHECK:STDOUT:   %I_where.type: type = facet_type <@I where TODO> [template]
// CHECK:STDOUT:   %T: %I_where.type = bind_symbolic_name T, 0 [symbolic]
// CHECK:STDOUT:   %T.patt: %I_where.type = symbolic_binding_pattern T, 0 [symbolic]
// CHECK:STDOUT:   %PeriodSelf.type: type = fn_type @PeriodSelf [template]
// CHECK:STDOUT:   %PeriodSelf: %PeriodSelf.type = struct_value () [template]
// CHECK:STDOUT:   %.Self.as_type: type = facet_access_type %.Self.258 [symbolic]
// CHECK:STDOUT:   %.Self.as_wit: <witness> = facet_access_witness %.Self.258 [symbolic]
// CHECK:STDOUT:   %I.facet: %I.type = facet_value %.Self.as_type, %.Self.as_wit [symbolic]
// CHECK:STDOUT:   %impl.elem0: type = impl_witness_access %.Self.as_wit, element0 [symbolic]
// CHECK:STDOUT:   %U: %I_where.type = bind_symbolic_name U, 0 [symbolic]
// CHECK:STDOUT:   %U.patt: %I_where.type = symbolic_binding_pattern U, 0 [symbolic]
// CHECK:STDOUT:   %PeriodMember.type: type = fn_type @PeriodMember [template]
// CHECK:STDOUT:   %PeriodMember: %PeriodMember.type = struct_value () [template]
// CHECK:STDOUT:   %.Self.644: type = bind_symbolic_name .Self [symbolic]
// CHECK:STDOUT:   %type_where: type = facet_type <type where TODO> [template]
// CHECK:STDOUT:   %V: %type_where = bind_symbolic_name V, 0 [symbolic]
// CHECK:STDOUT:   %V.patt: %type_where = symbolic_binding_pattern V, 0 [symbolic]
// CHECK:STDOUT:   %TypeSelfImpls.type: type = fn_type @TypeSelfImpls [template]
// CHECK:STDOUT:   %TypeSelfImpls: %TypeSelfImpls.type = struct_value () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .I = %I.decl
// CHECK:STDOUT:     .PeriodSelf = %PeriodSelf.decl
// CHECK:STDOUT:     .PeriodMember = %PeriodMember.decl
// CHECK:STDOUT:     .TypeSelfImpls = %TypeSelfImpls.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %I.decl: type = interface_decl @I [template = constants.%I.type] {} {}
// CHECK:STDOUT:   %PeriodSelf.decl: %PeriodSelf.type = fn_decl @PeriodSelf [template = constants.%PeriodSelf] {
// CHECK:STDOUT:     %T.patt.loc8_15.1: %I_where.type = symbolic_binding_pattern T, 0 [symbolic = %T.patt.loc8_15.2 (constants.%T.patt)]
// CHECK:STDOUT:     %T.param_patt: %I_where.type = value_param_pattern %T.patt.loc8_15.1, runtime_param<none> [symbolic = %T.patt.loc8_15.2 (constants.%T.patt)]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %T.param: %I_where.type = value_param runtime_param<none>
// CHECK:STDOUT:     %.loc8_21.1: type = splice_block %.loc8_21.2 [template = constants.%I_where.type] {
// CHECK:STDOUT:       %I.ref: type = name_ref I, file.%I.decl [template = constants.%I.type]
// CHECK:STDOUT:       %.Self: %I.type = bind_symbolic_name .Self [symbolic = constants.%.Self.258]
// CHECK:STDOUT:       %.Self.ref: %I.type = name_ref .Self, %.Self [symbolic = constants.%.Self.258]
// CHECK:STDOUT:       %.loc8_37: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT:       %.loc8_21.2: type = where_expr %.Self [template = constants.%I_where.type] {
// CHECK:STDOUT:         requirement_equivalent %.Self.ref, %.loc8_37
// CHECK:STDOUT:       }
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %T.loc8_15.1: %I_where.type = bind_symbolic_name T, 0, %T.param [symbolic = %T.loc8_15.2 (constants.%T)]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %PeriodMember.decl: %PeriodMember.type = fn_decl @PeriodMember [template = constants.%PeriodMember] {
// CHECK:STDOUT:     %U.patt.loc10_17.1: %I_where.type = symbolic_binding_pattern U, 0 [symbolic = %U.patt.loc10_17.2 (constants.%U.patt)]
// CHECK:STDOUT:     %U.param_patt: %I_where.type = value_param_pattern %U.patt.loc10_17.1, runtime_param<none> [symbolic = %U.patt.loc10_17.2 (constants.%U.patt)]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %U.param: %I_where.type = value_param runtime_param<none>
// CHECK:STDOUT:     %.loc10_23.1: type = splice_block %.loc10_23.2 [template = constants.%I_where.type] {
// CHECK:STDOUT:       %I.ref: type = name_ref I, file.%I.decl [template = constants.%I.type]
// CHECK:STDOUT:       %.Self: %I.type = bind_symbolic_name .Self [symbolic = constants.%.Self.258]
// CHECK:STDOUT:       %.Self.ref: %I.type = name_ref .Self, %.Self [symbolic = constants.%.Self.258]
// CHECK:STDOUT:       %Member.ref: %I.assoc_type = name_ref Member, @Member.%assoc0 [template = constants.%assoc0]
// CHECK:STDOUT:       %.Self.as_type: type = facet_access_type %.Self.ref [symbolic = constants.%.Self.as_type]
// CHECK:STDOUT:       %.loc10_29: type = converted %.Self.ref, %.Self.as_type [symbolic = constants.%.Self.as_type]
// CHECK:STDOUT:       %.Self.as_wit: <witness> = facet_access_witness %.Self.ref [symbolic = constants.%.Self.as_wit]
// CHECK:STDOUT:       %impl.elem0: type = impl_witness_access %.Self.as_wit, element0 [symbolic = constants.%impl.elem0]
// CHECK:STDOUT:       %.loc10_41: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT:       %.loc10_23.2: type = where_expr %.Self [template = constants.%I_where.type] {
// CHECK:STDOUT:         requirement_equivalent %impl.elem0, %.loc10_41
// CHECK:STDOUT:       }
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %U.loc10_17.1: %I_where.type = bind_symbolic_name U, 0, %U.param [symbolic = %U.loc10_17.2 (constants.%U)]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %TypeSelfImpls.decl: %TypeSelfImpls.type = fn_decl @TypeSelfImpls [template = constants.%TypeSelfImpls] {
// CHECK:STDOUT:     %V.patt.loc12_18.1: %type_where = symbolic_binding_pattern V, 0 [symbolic = %V.patt.loc12_18.2 (constants.%V.patt)]
// CHECK:STDOUT:     %V.param_patt: %type_where = value_param_pattern %V.patt.loc12_18.1, runtime_param<none> [symbolic = %V.patt.loc12_18.2 (constants.%V.patt)]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %V.param: %type_where = value_param runtime_param<none>
// CHECK:STDOUT:     %.loc12_27.1: type = splice_block %.loc12_27.2 [template = constants.%type_where] {
// CHECK:STDOUT:       %.Self: type = bind_symbolic_name .Self [symbolic = constants.%.Self.644]
// CHECK:STDOUT:       %.Self.ref: type = name_ref .Self, %.Self [symbolic = constants.%.Self.644]
// CHECK:STDOUT:       %I.ref: type = name_ref I, file.%I.decl [template = constants.%I.type]
// CHECK:STDOUT:       %.loc12_27.2: type = where_expr %.Self [template = constants.%type_where] {
// CHECK:STDOUT:         requirement_impls %.Self.ref, %I.ref
// CHECK:STDOUT:       }
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %V.loc12_18.1: %type_where = bind_symbolic_name V, 0, %V.param [symbolic = %V.loc12_18.2 (constants.%V)]
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I {
// CHECK:STDOUT:   %Self: %I.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT:   %Member: type = assoc_const_decl @Member [template] {
// CHECK:STDOUT:     %assoc0: %I.assoc_type = assoc_entity element0, @I.%Member [template = constants.%assoc0]
// CHECK:STDOUT:   }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = %Self
// CHECK:STDOUT:   .Member = @Member.%assoc0
// CHECK:STDOUT:   witness = (%Member)
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic assoc_const @Member(@I.%Self: %I.type) {
// CHECK:STDOUT:   assoc_const Member:! type;
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @PeriodSelf(%T.loc8_15.1: %I_where.type) {
// CHECK:STDOUT:   %T.loc8_15.2: %I_where.type = bind_symbolic_name T, 0 [symbolic = %T.loc8_15.2 (constants.%T)]
// CHECK:STDOUT:   %T.patt.loc8_15.2: %I_where.type = symbolic_binding_pattern T, 0 [symbolic = %T.patt.loc8_15.2 (constants.%T.patt)]
// CHECK:STDOUT:
// CHECK:STDOUT:   fn(%T.param_patt: %I_where.type);
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @PeriodMember(%U.loc10_17.1: %I_where.type) {
// CHECK:STDOUT:   %U.loc10_17.2: %I_where.type = bind_symbolic_name U, 0 [symbolic = %U.loc10_17.2 (constants.%U)]
// CHECK:STDOUT:   %U.patt.loc10_17.2: %I_where.type = symbolic_binding_pattern U, 0 [symbolic = %U.patt.loc10_17.2 (constants.%U.patt)]
// CHECK:STDOUT:
// CHECK:STDOUT:   fn(%U.param_patt: %I_where.type);
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @TypeSelfImpls(%V.loc12_18.1: %type_where) {
// CHECK:STDOUT:   %V.loc12_18.2: %type_where = bind_symbolic_name V, 0 [symbolic = %V.loc12_18.2 (constants.%V)]
// CHECK:STDOUT:   %V.patt.loc12_18.2: %type_where = symbolic_binding_pattern V, 0 [symbolic = %V.patt.loc12_18.2 (constants.%V.patt)]
// CHECK:STDOUT:
// CHECK:STDOUT:   fn(%V.param_patt: %type_where);
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Member(constants.%Self) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @PeriodSelf(constants.%T) {
// CHECK:STDOUT:   %T.loc8_15.2 => constants.%T
// CHECK:STDOUT:   %T.patt.loc8_15.2 => constants.%T
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Member(constants.%I.facet) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @PeriodMember(constants.%U) {
// CHECK:STDOUT:   %U.loc10_17.2 => constants.%U
// CHECK:STDOUT:   %U.patt.loc10_17.2 => constants.%U
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @TypeSelfImpls(constants.%V) {
// CHECK:STDOUT:   %V.loc12_18.2 => constants.%V
// CHECK:STDOUT:   %V.patt.loc12_18.2 => constants.%V
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_wrong_member.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %J.type: type = facet_type <@J> [template]
// CHECK:STDOUT:   %Self: %J.type = bind_symbolic_name Self, 0 [symbolic]
// CHECK:STDOUT:   %J.assoc_type: type = assoc_entity_type %J.type [template]
// CHECK:STDOUT:   %assoc0: %J.assoc_type = assoc_entity element0, @J.%Member [template]
// CHECK:STDOUT:   %.Self: %J.type = bind_symbolic_name .Self [symbolic]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [template]
// CHECK:STDOUT:   %W.patt: <error> = symbolic_binding_pattern W, 0 [symbolic]
// CHECK:STDOUT:   %PeriodMismatch.type: type = fn_type @PeriodMismatch [template]
// CHECK:STDOUT:   %PeriodMismatch: %PeriodMismatch.type = struct_value () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .J = %J.decl
// CHECK:STDOUT:     .PeriodMismatch = %PeriodMismatch.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %J.decl: type = interface_decl @J [template = constants.%J.type] {} {}
// CHECK:STDOUT:   %PeriodMismatch.decl: %PeriodMismatch.type = fn_decl @PeriodMismatch [template = constants.%PeriodMismatch] {
// CHECK:STDOUT:     %W.patt.loc12_19.1: <error> = symbolic_binding_pattern W, 0 [symbolic = %W.patt.loc12_19.2 (constants.%W.patt)]
// CHECK:STDOUT:     %W.param_patt: <error> = value_param_pattern %W.patt.loc12_19.1, runtime_param<none> [symbolic = %W.patt.loc12_19.2 (constants.%W.patt)]
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %W.param: <error> = value_param runtime_param<none>
// CHECK:STDOUT:     %.loc12_25.1: type = splice_block %.loc12_25.2 [template = <error>] {
// CHECK:STDOUT:       %J.ref: type = name_ref J, file.%J.decl [template = constants.%J.type]
// CHECK:STDOUT:       %.Self: %J.type = bind_symbolic_name .Self [symbolic = constants.%.Self]
// CHECK:STDOUT:       %.Self.ref: %J.type = name_ref .Self, %.Self [symbolic = constants.%.Self]
// CHECK:STDOUT:       %Mismatch.ref: <error> = name_ref Mismatch, <error> [template = <error>]
// CHECK:STDOUT:       %.loc12_44: %empty_struct_type = struct_literal ()
// CHECK:STDOUT:       %.loc12_25.2: type = where_expr %.Self [template = <error>] {
// CHECK:STDOUT:         requirement_rewrite %Mismatch.ref, <error>
// CHECK:STDOUT:       }
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %W: <error> = bind_symbolic_name W, 0, %W.param [template = <error>]
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @J {
// CHECK:STDOUT:   %Self: %J.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT:   %Member: type = assoc_const_decl @Member [template] {
// CHECK:STDOUT:     %assoc0: %J.assoc_type = assoc_entity element0, @J.%Member [template = constants.%assoc0]
// CHECK:STDOUT:   }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = %Self
// CHECK:STDOUT:   .Member = @Member.%assoc0
// CHECK:STDOUT:   witness = (%Member)
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic assoc_const @Member(@J.%Self: %J.type) {
// CHECK:STDOUT:   assoc_const Member:! type;
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @PeriodMismatch(%W: <error>) {
// CHECK:STDOUT:   %W.patt.loc12_19.2: <error> = symbolic_binding_pattern W, 0 [symbolic = %W.patt.loc12_19.2 (constants.%W.patt)]
// CHECK:STDOUT:
// CHECK:STDOUT:   fn(%W.param_patt: <error>);
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Member(constants.%Self) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @PeriodMismatch(<error>) {
// CHECK:STDOUT:   %W.patt.loc12_19.2 => <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_designator_matches_var.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [template]
// CHECK:STDOUT:   %Foo.type: type = fn_type @Foo [template]
// CHECK:STDOUT:   %Foo: %Foo.type = struct_value () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .Foo = %Foo.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %Foo.decl: %Foo.type = fn_decl @Foo [template = constants.%Foo] {
// CHECK:STDOUT:     %return.patt: %empty_tuple.type = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: %empty_tuple.type = out_param_pattern %return.patt, runtime_param0
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %.loc4_14.1: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT:     %.loc4_14.2: type = converted %.loc4_14.1, constants.%empty_tuple.type [template = constants.%empty_tuple.type]
// CHECK:STDOUT:     %return.param: ref %empty_tuple.type = out_param runtime_param0
// CHECK:STDOUT:     %return: ref %empty_tuple.type = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Foo() -> %empty_tuple.type {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   name_binding_decl {
// CHECK:STDOUT:     %x.patt: %empty_tuple.type = binding_pattern x
// CHECK:STDOUT:     %.loc5_3: %empty_tuple.type = var_pattern %x.patt
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %x.var: ref %empty_tuple.type = var x
// CHECK:STDOUT:   %.loc5_11.1: type = splice_block %.loc5_11.3 [template = constants.%empty_tuple.type] {
// CHECK:STDOUT:     %.loc5_11.2: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT:     %.loc5_11.3: type = converted %.loc5_11.2, constants.%empty_tuple.type [template = constants.%empty_tuple.type]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %x: ref %empty_tuple.type = bind_name x, %x.var
// CHECK:STDOUT:   %.Self.ref: <error> = name_ref .Self, <error> [template = <error>]
// CHECK:STDOUT:   %x.ref: <error> = name_ref x, <error> [template = <error>]
// CHECK:STDOUT:   return <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_unknown_designator.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [template]
// CHECK:STDOUT:   %Bar.type: type = fn_type @Bar [template]
// CHECK:STDOUT:   %Bar: %Bar.type = struct_value () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .Bar = %Bar.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %Bar.decl: %Bar.type = fn_decl @Bar [template = constants.%Bar] {
// CHECK:STDOUT:     %return.patt: %empty_tuple.type = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: %empty_tuple.type = out_param_pattern %return.patt, runtime_param0
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %.loc4_14.1: %empty_tuple.type = tuple_literal ()
// CHECK:STDOUT:     %.loc4_14.2: type = converted %.loc4_14.1, constants.%empty_tuple.type [template = constants.%empty_tuple.type]
// CHECK:STDOUT:     %return.param: ref %empty_tuple.type = out_param runtime_param0
// CHECK:STDOUT:     %return: ref %empty_tuple.type = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Bar() -> %empty_tuple.type {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %.Self.ref: <error> = name_ref .Self, <error> [template = <error>]
// CHECK:STDOUT:   %undef.ref: <error> = name_ref undef, <error> [template = <error>]
// CHECK:STDOUT:   return <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_dot_self_method_return_value.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [template]
// CHECK:STDOUT:   %F.type: type = fn_type @F [template]
// CHECK:STDOUT:   %F: %F.type = struct_value () [template]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [template]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %C.decl: type = class_decl @C [template = constants.%C] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [template = constants.%F] {
// CHECK:STDOUT:     %return.patt: %C = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: %C = out_param_pattern %return.patt, runtime_param0
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %Self.ref: type = name_ref Self, constants.%C [template = constants.%C]
// CHECK:STDOUT:     %return.param: ref %C = out_param runtime_param0
// CHECK:STDOUT:     %return: ref %C = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [template = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT:   .F = %F.decl
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() -> %return.param_patt: %C {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %.Self.ref: <error> = name_ref .Self, <error> [template = <error>]
// CHECK:STDOUT:   return <error> to %return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_dot_self_method_return_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %D: type = class_type @D [template]
// CHECK:STDOUT:   %G.type: type = fn_type @G [template]
// CHECK:STDOUT:   %G: %G.type = struct_value () [template]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [template]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .D = %D.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %D.decl: type = class_decl @D [template = constants.%D] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @D {
// CHECK:STDOUT:   %G.decl: %G.type = fn_decl @G [template = constants.%G] {
// CHECK:STDOUT:     %return.patt: <error> = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: <error> = out_param_pattern %return.patt, runtime_param0
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %.Self.ref: <error> = name_ref .Self, <error> [template = <error>]
// CHECK:STDOUT:     %return.param: ref <error> = out_param runtime_param0
// CHECK:STDOUT:     %return: ref <error> = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [template = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%D
// CHECK:STDOUT:   .G = %G.decl
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G() -> <error> {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Self.ref: type = name_ref Self, constants.%D [template = constants.%D]
// CHECK:STDOUT:   return <error>
// CHECK:STDOUT: }
// CHECK:STDOUT: