// 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/function/builtin/method.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/function/builtin/method.carbon

interface I {
  fn F[self: Self](other: Self) -> Self;
}

impl i32 as I {
  fn F[self: i32](other: i32) -> i32 = "int.sadd";
}

var arr: array(i32, (1 as i32).(I.F)(2));

// CHECK:STDOUT: --- method.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %I.type: type = facet_type <@I> [concrete]
// CHECK:STDOUT:   %Self.826: %I.type = bind_symbolic_name Self, 0 [symbolic]
// CHECK:STDOUT:   %Self.as_type.b70: type = facet_access_type %Self.826 [symbolic]
// CHECK:STDOUT:   %F.type.cf0: type = fn_type @F.1 [concrete]
// CHECK:STDOUT:   %F.bc6: %F.type.cf0 = struct_value () [concrete]
// CHECK:STDOUT:   %I.assoc_type: type = assoc_entity_type %I.type [concrete]
// CHECK:STDOUT:   %assoc0.a5e: %I.assoc_type = assoc_entity element0, @I.%F.decl [concrete]
// CHECK:STDOUT:   %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT:   %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT:   %impl_witness.da7: <witness> = impl_witness (@impl.a9a.%F.decl) [concrete]
// CHECK:STDOUT:   %F.type.066: type = fn_type @F.2 [concrete]
// CHECK:STDOUT:   %F.9ec: %F.type.066 = struct_value () [concrete]
// CHECK:STDOUT:   %I.facet: %I.type = facet_value %i32, (%impl_witness.da7) [concrete]
// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
// CHECK:STDOUT:   %As.type.fd4: type = facet_type <@As, @As(%i32)> [concrete]
// CHECK:STDOUT:   %Convert.type.99b: type = fn_type @Convert.1, @As(%i32) [concrete]
// CHECK:STDOUT:   %ImplicitAs.type.2fd: type = facet_type <@ImplicitAs, @ImplicitAs(Core.IntLiteral)> [concrete]
// CHECK:STDOUT:   %Convert.type.71e: type = fn_type @Convert.2, @ImplicitAs(Core.IntLiteral) [concrete]
// CHECK:STDOUT:   %impl_witness.882: <witness> = impl_witness (imports.%Core.import_ref.78a), @impl.686(%int_32) [concrete]
// CHECK:STDOUT:   %Convert.type.4fd: type = fn_type @Convert.5, @impl.686(%int_32) [concrete]
// CHECK:STDOUT:   %Convert.197: %Convert.type.4fd = struct_value () [concrete]
// CHECK:STDOUT:   %As.facet: %As.type.fd4 = facet_value Core.IntLiteral, (%impl_witness.882) [concrete]
// CHECK:STDOUT:   %.249: type = fn_type_with_self_type %Convert.type.99b, %As.facet [concrete]
// CHECK:STDOUT:   %Convert.bound.c1b: <bound method> = bound_method %int_1.5b8, %Convert.197 [concrete]
// CHECK:STDOUT:   %Convert.specific_fn.aad: <specific function> = specific_function %Convert.197, @Convert.5(%int_32) [concrete]
// CHECK:STDOUT:   %bound_method.082: <bound method> = bound_method %int_1.5b8, %Convert.specific_fn.aad [concrete]
// CHECK:STDOUT:   %int_1.5d2: %i32 = int_value 1 [concrete]
// CHECK:STDOUT:   %.62e: type = fn_type_with_self_type %F.type.cf0, %I.facet [concrete]
// CHECK:STDOUT:   %F.bound: <bound method> = bound_method %int_1.5d2, %F.9ec [concrete]
// CHECK:STDOUT:   %int_2.ecc: Core.IntLiteral = int_value 2 [concrete]
// CHECK:STDOUT:   %ImplicitAs.type.205: type = facet_type <@ImplicitAs, @ImplicitAs(%i32)> [concrete]
// CHECK:STDOUT:   %Convert.type.1b6: type = fn_type @Convert.2, @ImplicitAs(%i32) [concrete]
// CHECK:STDOUT:   %impl_witness.d39: <witness> = impl_witness (imports.%Core.import_ref.a5b), @impl.4f9(%int_32) [concrete]
// CHECK:STDOUT:   %Convert.type.035: type = fn_type @Convert.3, @impl.4f9(%int_32) [concrete]
// CHECK:STDOUT:   %Convert.956: %Convert.type.035 = struct_value () [concrete]
// CHECK:STDOUT:   %ImplicitAs.facet.2b8: %ImplicitAs.type.205 = facet_value Core.IntLiteral, (%impl_witness.d39) [concrete]
// CHECK:STDOUT:   %.be7: type = fn_type_with_self_type %Convert.type.1b6, %ImplicitAs.facet.2b8 [concrete]
// CHECK:STDOUT:   %Convert.bound.ef9: <bound method> = bound_method %int_2.ecc, %Convert.956 [concrete]
// CHECK:STDOUT:   %Convert.specific_fn.b6f: <specific function> = specific_function %Convert.956, @Convert.3(%int_32) [concrete]
// CHECK:STDOUT:   %bound_method.b92: <bound method> = bound_method %int_2.ecc, %Convert.specific_fn.b6f [concrete]
// CHECK:STDOUT:   %int_2.ef8: %i32 = int_value 2 [concrete]
// CHECK:STDOUT:   %int_3.822: %i32 = int_value 3 [concrete]
// CHECK:STDOUT:   %impl_witness.023: <witness> = impl_witness (imports.%Core.import_ref.85c), @impl.971(%int_32) [concrete]
// CHECK:STDOUT:   %Convert.type.4ad: type = fn_type @Convert.4, @impl.971(%int_32) [concrete]
// CHECK:STDOUT:   %Convert.960: %Convert.type.4ad = struct_value () [concrete]
// CHECK:STDOUT:   %ImplicitAs.facet.ffe: %ImplicitAs.type.2fd = facet_value %i32, (%impl_witness.023) [concrete]
// CHECK:STDOUT:   %.4d8: type = fn_type_with_self_type %Convert.type.71e, %ImplicitAs.facet.ffe [concrete]
// CHECK:STDOUT:   %Convert.bound.2d6: <bound method> = bound_method %int_3.822, %Convert.960 [concrete]
// CHECK:STDOUT:   %Convert.specific_fn.8a8: <specific function> = specific_function %Convert.960, @Convert.4(%int_32) [concrete]
// CHECK:STDOUT:   %bound_method.c6f: <bound method> = bound_method %int_3.822, %Convert.specific_fn.8a8 [concrete]
// CHECK:STDOUT:   %int_3.1ba: Core.IntLiteral = int_value 3 [concrete]
// CHECK:STDOUT:   %array_type: type = array_type %int_3.1ba, %i32 [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT:     .Int = %Core.Int
// CHECK:STDOUT:     .As = %Core.As
// CHECK:STDOUT:     .ImplicitAs = %Core.ImplicitAs
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .I = %I.decl
// CHECK:STDOUT:     .arr = %arr
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %I.decl: type = interface_decl @I [concrete = constants.%I.type] {} {}
// CHECK:STDOUT:   impl_decl @impl.a9a [concrete] {} {
// CHECK:STDOUT:     %int_32: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:     %i32: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:     %I.ref: type = name_ref I, file.%I.decl [concrete = constants.%I.type]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %impl_witness: <witness> = impl_witness (@impl.a9a.%F.decl) [concrete = constants.%impl_witness.da7]
// CHECK:STDOUT:   name_binding_decl {
// CHECK:STDOUT:     %arr.patt: %array_type = binding_pattern arr
// CHECK:STDOUT:     %.loc19_1: %array_type = var_pattern %arr.patt
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %arr.var: ref %array_type = var arr
// CHECK:STDOUT:   %.loc19_40: type = splice_block %array_type [concrete = constants.%array_type] {
// CHECK:STDOUT:     %int_32.loc19_16: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:     %i32.loc19_16: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:     %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT:     %int_32.loc19_27: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:     %i32.loc19_27: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:     %impl.elem0.loc19_24: %.249 = impl_witness_access constants.%impl_witness.882, element0 [concrete = constants.%Convert.197]
// CHECK:STDOUT:     %bound_method.loc19_24.1: <bound method> = bound_method %int_1, %impl.elem0.loc19_24 [concrete = constants.%Convert.bound.c1b]
// CHECK:STDOUT:     %specific_fn.loc19_24: <specific function> = specific_function %impl.elem0.loc19_24, @Convert.5(constants.%int_32) [concrete = constants.%Convert.specific_fn.aad]
// CHECK:STDOUT:     %bound_method.loc19_24.2: <bound method> = bound_method %int_1, %specific_fn.loc19_24 [concrete = constants.%bound_method.082]
// CHECK:STDOUT:     %int.convert_checked.loc19_24: init %i32 = call %bound_method.loc19_24.2(%int_1) [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:     %.loc19_24.1: %i32 = value_of_initializer %int.convert_checked.loc19_24 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:     %.loc19_24.2: %i32 = converted %int_1, %.loc19_24.1 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT:     %I.ref: type = name_ref I, %I.decl [concrete = constants.%I.type]
// CHECK:STDOUT:     %F.ref: %I.assoc_type = name_ref F, @I.%assoc0 [concrete = constants.%assoc0.a5e]
// CHECK:STDOUT:     %impl.elem0.loc19_31: %.62e = impl_witness_access constants.%impl_witness.da7, element0 [concrete = constants.%F.9ec]
// CHECK:STDOUT:     %bound_method.loc19_31: <bound method> = bound_method %.loc19_24.2, %impl.elem0.loc19_31 [concrete = constants.%F.bound]
// CHECK:STDOUT:     %int_2: Core.IntLiteral = int_value 2 [concrete = constants.%int_2.ecc]
// CHECK:STDOUT:     %impl.elem0.loc19_38: %.be7 = impl_witness_access constants.%impl_witness.d39, element0 [concrete = constants.%Convert.956]
// CHECK:STDOUT:     %bound_method.loc19_38.1: <bound method> = bound_method %int_2, %impl.elem0.loc19_38 [concrete = constants.%Convert.bound.ef9]
// CHECK:STDOUT:     %specific_fn.loc19_38: <specific function> = specific_function %impl.elem0.loc19_38, @Convert.3(constants.%int_32) [concrete = constants.%Convert.specific_fn.b6f]
// CHECK:STDOUT:     %bound_method.loc19_38.2: <bound method> = bound_method %int_2, %specific_fn.loc19_38 [concrete = constants.%bound_method.b92]
// CHECK:STDOUT:     %int.convert_checked.loc19_38: init %i32 = call %bound_method.loc19_38.2(%int_2) [concrete = constants.%int_2.ef8]
// CHECK:STDOUT:     %.loc19_38.1: %i32 = value_of_initializer %int.convert_checked.loc19_38 [concrete = constants.%int_2.ef8]
// CHECK:STDOUT:     %.loc19_38.2: %i32 = converted %int_2, %.loc19_38.1 [concrete = constants.%int_2.ef8]
// CHECK:STDOUT:     %int.sadd: init %i32 = call %bound_method.loc19_31(%.loc19_24.2, %.loc19_38.2) [concrete = constants.%int_3.822]
// CHECK:STDOUT:     %impl.elem0.loc19_39: %.4d8 = impl_witness_access constants.%impl_witness.023, element0 [concrete = constants.%Convert.960]
// CHECK:STDOUT:     %bound_method.loc19_39.1: <bound method> = bound_method %int.sadd, %impl.elem0.loc19_39 [concrete = constants.%Convert.bound.2d6]
// CHECK:STDOUT:     %specific_fn.loc19_39: <specific function> = specific_function %impl.elem0.loc19_39, @Convert.4(constants.%int_32) [concrete = constants.%Convert.specific_fn.8a8]
// CHECK:STDOUT:     %bound_method.loc19_39.2: <bound method> = bound_method %int.sadd, %specific_fn.loc19_39 [concrete = constants.%bound_method.c6f]
// CHECK:STDOUT:     %.loc19_39.1: %i32 = value_of_initializer %int.sadd [concrete = constants.%int_3.822]
// CHECK:STDOUT:     %.loc19_39.2: %i32 = converted %int.sadd, %.loc19_39.1 [concrete = constants.%int_3.822]
// CHECK:STDOUT:     %int.convert_checked.loc19_39: init Core.IntLiteral = call %bound_method.loc19_39.2(%.loc19_39.2) [concrete = constants.%int_3.1ba]
// CHECK:STDOUT:     %.loc19_39.3: Core.IntLiteral = value_of_initializer %int.convert_checked.loc19_39 [concrete = constants.%int_3.1ba]
// CHECK:STDOUT:     %.loc19_39.4: Core.IntLiteral = converted %int.sadd, %.loc19_39.3 [concrete = constants.%int_3.1ba]
// CHECK:STDOUT:     %array_type: type = array_type %.loc19_39.4, %i32 [concrete = constants.%array_type]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %arr: ref %array_type = bind_name arr, %arr.var
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I {
// CHECK:STDOUT:   %Self: %I.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self.826]
// CHECK:STDOUT:   %F.decl: %F.type.cf0 = fn_decl @F.1 [concrete = constants.%F.bc6] {
// CHECK:STDOUT:     %self.patt: @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70) = binding_pattern self
// CHECK:STDOUT:     %self.param_patt: @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70) = value_param_pattern %self.patt, call_param0
// CHECK:STDOUT:     %other.patt: @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70) = binding_pattern other
// CHECK:STDOUT:     %other.param_patt: @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70) = value_param_pattern %other.patt, call_param1
// CHECK:STDOUT:     %return.patt: @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70) = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70) = out_param_pattern %return.patt, call_param2
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %Self.ref.loc12_36: %I.type = name_ref Self, @I.%Self [symbolic = %Self (constants.%Self.826)]
// CHECK:STDOUT:     %Self.as_type.loc12_36: type = facet_access_type %Self.ref.loc12_36 [symbolic = %Self.as_type.loc12_14.1 (constants.%Self.as_type.b70)]
// CHECK:STDOUT:     %.loc12_36: type = converted %Self.ref.loc12_36, %Self.as_type.loc12_36 [symbolic = %Self.as_type.loc12_14.1 (constants.%Self.as_type.b70)]
// CHECK:STDOUT:     %self.param: @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70) = value_param call_param0
// CHECK:STDOUT:     %.loc12_14.1: type = splice_block %.loc12_14.2 [symbolic = %Self.as_type.loc12_14.1 (constants.%Self.as_type.b70)] {
// CHECK:STDOUT:       %Self.ref.loc12_14: %I.type = name_ref Self, @I.%Self [symbolic = %Self (constants.%Self.826)]
// CHECK:STDOUT:       %Self.as_type.loc12_14.2: type = facet_access_type %Self.ref.loc12_14 [symbolic = %Self.as_type.loc12_14.1 (constants.%Self.as_type.b70)]
// CHECK:STDOUT:       %.loc12_14.2: type = converted %Self.ref.loc12_14, %Self.as_type.loc12_14.2 [symbolic = %Self.as_type.loc12_14.1 (constants.%Self.as_type.b70)]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %self: @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70) = bind_name self, %self.param
// CHECK:STDOUT:     %other.param: @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70) = value_param call_param1
// CHECK:STDOUT:     %.loc12_27.1: type = splice_block %.loc12_27.2 [symbolic = %Self.as_type.loc12_14.1 (constants.%Self.as_type.b70)] {
// CHECK:STDOUT:       %Self.ref.loc12_27: %I.type = name_ref Self, @I.%Self [symbolic = %Self (constants.%Self.826)]
// CHECK:STDOUT:       %Self.as_type.loc12_27: type = facet_access_type %Self.ref.loc12_27 [symbolic = %Self.as_type.loc12_14.1 (constants.%Self.as_type.b70)]
// CHECK:STDOUT:       %.loc12_27.2: type = converted %Self.ref.loc12_27, %Self.as_type.loc12_27 [symbolic = %Self.as_type.loc12_14.1 (constants.%Self.as_type.b70)]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %other: @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70) = bind_name other, %other.param
// CHECK:STDOUT:     %return.param: ref @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70) = out_param call_param2
// CHECK:STDOUT:     %return: ref @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70) = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %assoc0: %I.assoc_type = assoc_entity element0, %F.decl [concrete = constants.%assoc0.a5e]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = %Self
// CHECK:STDOUT:   .F = %assoc0
// CHECK:STDOUT:   witness = (%F.decl)
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl.a9a: %i32 as %I.ref {
// CHECK:STDOUT:   %F.decl: %F.type.066 = fn_decl @F.2 [concrete = constants.%F.9ec] {
// CHECK:STDOUT:     %self.patt: %i32 = binding_pattern self
// CHECK:STDOUT:     %self.param_patt: %i32 = value_param_pattern %self.patt, call_param0
// CHECK:STDOUT:     %other.patt: %i32 = binding_pattern other
// CHECK:STDOUT:     %other.param_patt: %i32 = value_param_pattern %other.patt, call_param1
// CHECK:STDOUT:     %return.patt: %i32 = return_slot_pattern
// CHECK:STDOUT:     %return.param_patt: %i32 = out_param_pattern %return.patt, call_param2
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %int_32.loc16_34: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:     %i32.loc16_34: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:     %self.param: %i32 = value_param call_param0
// CHECK:STDOUT:     %.loc16_14: type = splice_block %i32.loc16_14 [concrete = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc16_14: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:       %i32.loc16_14: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %self: %i32 = bind_name self, %self.param
// CHECK:STDOUT:     %other.param: %i32 = value_param call_param1
// CHECK:STDOUT:     %.loc16_26: type = splice_block %i32.loc16_26 [concrete = constants.%i32] {
// CHECK:STDOUT:       %int_32.loc16_26: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT:       %i32.loc16_26: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT:     }
// CHECK:STDOUT:     %other: %i32 = bind_name other, %other.param
// CHECK:STDOUT:     %return.param: ref %i32 = out_param call_param2
// CHECK:STDOUT:     %return: ref %i32 = return_slot %return.param
// CHECK:STDOUT:   }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .F = %F.decl
// CHECK:STDOUT:   witness = file.%impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @F.1(@I.%Self: %I.type) {
// CHECK:STDOUT:   %Self: %I.type = bind_symbolic_name Self, 0 [symbolic = %Self (constants.%Self.826)]
// CHECK:STDOUT:   %Self.as_type.loc12_14.1: type = facet_access_type %Self [symbolic = %Self.as_type.loc12_14.1 (constants.%Self.as_type.b70)]
// CHECK:STDOUT:
// CHECK:STDOUT:   fn[%self.param_patt: @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70)](%other.param_patt: @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70)) -> @F.1.%Self.as_type.loc12_14.1 (%Self.as_type.b70);
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.2[%self.param_patt: %i32](%other.param_patt: %i32) -> %i32 = "int.sadd";
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F.1(constants.%Self.826) {
// CHECK:STDOUT:   %Self => constants.%Self.826
// CHECK:STDOUT:   %Self.as_type.loc12_14.1 => constants.%Self.as_type.b70
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F.1(constants.%I.facet) {
// CHECK:STDOUT:   %Self => constants.%I.facet
// CHECK:STDOUT:   %Self.as_type.loc12_14.1 => constants.%i32
// CHECK:STDOUT: }
// CHECK:STDOUT: