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carbon-lang/toolchain/check/testdata/if_expr/struct.carbon
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Dana Jansens 917a6ea971 Add an interface-with-self generic to each interface and same for constraints (#6667) 
Currently each interface has a `Self` facet internally that becomes a
binding to every entity inside the interface: associated constants,
functions, and require decls. Each of these has to be independently
generic as a result. This makes is challenging in extended name lookup
to move into an extended scope of an interface, as we have a specific
for the interface, but the names within require a different specific
that includes a `Self` facet value.

We generalize this relationship by adding a second generic to Interface,
called `generic_with_self`. When we want to work with entities inside
the interface, we move from the interface-without-specific to the
interface-with-self specific by adding a Self to the specific. This is
done independently of any particular entity inside the Interface, as
those entities are now all members of the interface-with-self generic.

Associated constants no longer need a generic of their own, as they do
not have separate generic bindings. Functions retain a generic, but if
the function has no generic arguments, it will have no bindings of its
own now.

Require decls retain a generic so that their specific can be
instantiated separately from the interface. Requiring the interface to
be complete does not require the types in a require decl to be complete
unless it is modified by `extend`. So we allow them to be completed
later by keeping them in a separate generic.

Named constraints look like interfaces and gain the additional inner
generic-with-self, with the same relationship to require decls.

This removes the need for name lookup to perform Substitution of a Self
facet into the extended scope instruction. Instead, the
`SpecificConstant` instruction inserted by a `require` decl is part of
the interface-with-self generic. When looking through a FacetType for
extended scopes, for each interface, we push the scope with the specific
for the interface-with-self. Then the constant value of the
`SpecificConstant` is correctly modified by the provided self
automatically through applying that specific.
2026-02-19 16:24:07 +00:00

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// 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
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/primitives.carbon
// TODO: Add ranges and switch to "--dump-sem-ir-ranges=only".
// EXTRA-ARGS: --dump-sem-ir-ranges=if-present
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/if_expr/struct.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/if_expr/struct.carbon
fn G(s: {.a: i32, .b: i32});
fn F(cond: bool) {
var a: {.a: i32, .b: i32} = {.a = 1, .b = 2};
G(if cond then a else a);
}
// CHECK:STDOUT: --- struct.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT: %Int.type: type = generic_class_type @Int [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %Int.generic: %Int.type = struct_value () [concrete]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT: %struct_type.a.b.501: type = struct_type {.a: %i32, .b: %i32} [concrete]
// CHECK:STDOUT: %pattern_type.851: type = pattern_type %struct_type.a.b.501 [concrete]
// CHECK:STDOUT: %G.type: type = fn_type @G [concrete]
// CHECK:STDOUT: %G: %G.type = struct_value () [concrete]
// CHECK:STDOUT: %Bool.type: type = fn_type @Bool [concrete]
// CHECK:STDOUT: %Bool: %Bool.type = struct_value () [concrete]
// CHECK:STDOUT: %pattern_type.831: type = pattern_type bool [concrete]
// CHECK:STDOUT: %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT: %F: %F.type = struct_value () [concrete]
// CHECK:STDOUT: %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
// CHECK:STDOUT: %int_2.ecc: Core.IntLiteral = int_value 2 [concrete]
// CHECK:STDOUT: %struct_type.a.b.cfd: type = struct_type {.a: Core.IntLiteral, .b: Core.IntLiteral} [concrete]
// CHECK:STDOUT: %struct.4aa: %struct_type.a.b.cfd = struct_value (%int_1.5b8, %int_2.ecc) [concrete]
// CHECK:STDOUT: %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
// CHECK:STDOUT: %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
// CHECK:STDOUT: %ImplicitAs.type.e8c: type = facet_type <@ImplicitAs, @ImplicitAs(%i32)> [concrete]
// CHECK:STDOUT: %To: Core.IntLiteral = symbolic_binding To, 0 [symbolic]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.4e6: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%To) [symbolic]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.3c2: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.4e6 = struct_value () [symbolic]
// CHECK:STDOUT: %ImplicitAs.impl_witness.6bc: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.74f, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.e0d: type = fn_type @Core.IntLiteral.as.ImplicitAs.impl.Convert, @Core.IntLiteral.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.0b5: %Core.IntLiteral.as.ImplicitAs.impl.Convert.type.e0d = struct_value () [concrete]
// CHECK:STDOUT: %ImplicitAs.facet: %ImplicitAs.type.e8c = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.6bc) [concrete]
// CHECK:STDOUT: %ImplicitAs.WithSelf.Convert.type.b37: type = fn_type @ImplicitAs.WithSelf.Convert, @ImplicitAs(%i32, %ImplicitAs.facet) [concrete]
// CHECK:STDOUT: %.545: type = fn_type_with_self_type %ImplicitAs.WithSelf.Convert.type.b37, %ImplicitAs.facet [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.215: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.0b5 [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn: <specific function> = specific_function %Core.IntLiteral.as.ImplicitAs.impl.Convert.0b5, @Core.IntLiteral.as.ImplicitAs.impl.Convert(%int_32) [concrete]
// CHECK:STDOUT: %bound_method.38b: <bound method> = bound_method %int_1.5b8, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT: %int_1.5d2: %i32 = int_value 1 [concrete]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.4e5: <bound method> = bound_method %int_2.ecc, %Core.IntLiteral.as.ImplicitAs.impl.Convert.0b5 [concrete]
// CHECK:STDOUT: %bound_method.646: <bound method> = bound_method %int_2.ecc, %Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT: %int_2.ef8: %i32 = int_value 2 [concrete]
// CHECK:STDOUT: %struct.ed5: %struct_type.a.b.501 = struct_value (%int_1.5d2, %int_2.ef8) [concrete]
// CHECK:STDOUT: %Destroy.type: type = facet_type <@Destroy> [concrete]
// CHECK:STDOUT: %DestroyOp.type: type = fn_type @DestroyOp [concrete]
// CHECK:STDOUT: %DestroyOp: %DestroyOp.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: .Int = %Core.Int
// CHECK:STDOUT: .Bool = %Core.Bool
// CHECK:STDOUT: .ImplicitAs = %Core.ImplicitAs
// CHECK:STDOUT: .Destroy = %Core.Destroy
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.Int: %Int.type = import_ref Core//prelude/parts/int, Int, loaded [concrete = constants.%Int.generic]
// CHECK:STDOUT: %Core.Bool: %Bool.type = import_ref Core//prelude/parts/bool, Bool, loaded [concrete = constants.%Bool]
// CHECK:STDOUT: %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/parts/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
// CHECK:STDOUT: %Core.import_ref.42d: @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert.type (%Core.IntLiteral.as.ImplicitAs.impl.Convert.type.4e6) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Core.IntLiteral.as.ImplicitAs.impl.%Core.IntLiteral.as.ImplicitAs.impl.Convert (constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.3c2)]
// CHECK:STDOUT: %ImplicitAs.impl_witness_table.74f = impl_witness_table (%Core.import_ref.42d), @Core.IntLiteral.as.ImplicitAs.impl [concrete]
// CHECK:STDOUT: %Core.Destroy: type = import_ref Core//prelude/parts/destroy, Destroy, loaded [concrete = constants.%Destroy.type]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .G = %G.decl
// CHECK:STDOUT: .F = %F.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {
// CHECK:STDOUT: %s.patt: %pattern_type.851 = value_binding_pattern s [concrete]
// CHECK:STDOUT: %s.param_patt: %pattern_type.851 = value_param_pattern %s.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %s.param: %struct_type.a.b.501 = value_param call_param0
// CHECK:STDOUT: %.loc15: type = splice_block %struct_type.a.b [concrete = constants.%struct_type.a.b.501] {
// CHECK:STDOUT: %int_32.loc15_14: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc15_14: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %int_32.loc15_23: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc15_23: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %struct_type.a.b: type = struct_type {.a: %i32, .b: %i32} [concrete = constants.%struct_type.a.b.501]
// CHECK:STDOUT: }
// CHECK:STDOUT: %s: %struct_type.a.b.501 = value_binding s, %s.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {
// CHECK:STDOUT: %cond.patt: %pattern_type.831 = value_binding_pattern cond [concrete]
// CHECK:STDOUT: %cond.param_patt: %pattern_type.831 = value_param_pattern %cond.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %cond.param: bool = value_param call_param0
// CHECK:STDOUT: %.loc17_12.1: type = splice_block %.loc17_12.3 [concrete = bool] {
// CHECK:STDOUT: %Bool.call: init type = call constants.%Bool() [concrete = bool]
// CHECK:STDOUT: %.loc17_12.2: type = value_of_initializer %Bool.call [concrete = bool]
// CHECK:STDOUT: %.loc17_12.3: type = converted %Bool.call, %.loc17_12.2 [concrete = bool]
// CHECK:STDOUT: }
// CHECK:STDOUT: %cond: bool = value_binding cond, %cond.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G(%s.param: %struct_type.a.b.501);
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%cond.param: bool) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %a.patt: %pattern_type.851 = ref_binding_pattern a [concrete]
// CHECK:STDOUT: %a.var_patt: %pattern_type.851 = var_pattern %a.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a.var: ref %struct_type.a.b.501 = var %a.var_patt
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
// CHECK:STDOUT: %int_2: Core.IntLiteral = int_value 2 [concrete = constants.%int_2.ecc]
// CHECK:STDOUT: %.loc18_46.1: %struct_type.a.b.cfd = struct_literal (%int_1, %int_2) [concrete = constants.%struct.4aa]
// CHECK:STDOUT: %impl.elem0.loc18_46.1: %.545 = impl_witness_access constants.%ImplicitAs.impl_witness.6bc, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.0b5]
// CHECK:STDOUT: %bound_method.loc18_46.1: <bound method> = bound_method %int_1, %impl.elem0.loc18_46.1 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.215]
// CHECK:STDOUT: %specific_fn.loc18_46.1: <specific function> = specific_function %impl.elem0.loc18_46.1, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc18_46.2: <bound method> = bound_method %int_1, %specific_fn.loc18_46.1 [concrete = constants.%bound_method.38b]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc18_46.1: init %i32 = call %bound_method.loc18_46.2(%int_1) [concrete = constants.%int_1.5d2]
// CHECK:STDOUT: %.loc18_46.2: init %i32 = converted %int_1, %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc18_46.1 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT: %.loc18_46.3: ref %i32 = struct_access %a.var, element0
// CHECK:STDOUT: %.loc18_46.4: init %i32 to %.loc18_46.3 = in_place_init %.loc18_46.2 [concrete = constants.%int_1.5d2]
// CHECK:STDOUT: %impl.elem0.loc18_46.2: %.545 = impl_witness_access constants.%ImplicitAs.impl_witness.6bc, element0 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.0b5]
// CHECK:STDOUT: %bound_method.loc18_46.3: <bound method> = bound_method %int_2, %impl.elem0.loc18_46.2 [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.bound.4e5]
// CHECK:STDOUT: %specific_fn.loc18_46.2: <specific function> = specific_function %impl.elem0.loc18_46.2, @Core.IntLiteral.as.ImplicitAs.impl.Convert(constants.%int_32) [concrete = constants.%Core.IntLiteral.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc18_46.4: <bound method> = bound_method %int_2, %specific_fn.loc18_46.2 [concrete = constants.%bound_method.646]
// CHECK:STDOUT: %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc18_46.2: init %i32 = call %bound_method.loc18_46.4(%int_2) [concrete = constants.%int_2.ef8]
// CHECK:STDOUT: %.loc18_46.5: init %i32 = converted %int_2, %Core.IntLiteral.as.ImplicitAs.impl.Convert.call.loc18_46.2 [concrete = constants.%int_2.ef8]
// CHECK:STDOUT: %.loc18_46.6: ref %i32 = struct_access %a.var, element1
// CHECK:STDOUT: %.loc18_46.7: init %i32 to %.loc18_46.6 = in_place_init %.loc18_46.5 [concrete = constants.%int_2.ef8]
// CHECK:STDOUT: %.loc18_46.8: init %struct_type.a.b.501 to %a.var = struct_init (%.loc18_46.4, %.loc18_46.7) [concrete = constants.%struct.ed5]
// CHECK:STDOUT: %.loc18_3: init %struct_type.a.b.501 = converted %.loc18_46.1, %.loc18_46.8 [concrete = constants.%struct.ed5]
// CHECK:STDOUT: assign %a.var, %.loc18_3
// CHECK:STDOUT: %.loc18_27: type = splice_block %struct_type.a.b [concrete = constants.%struct_type.a.b.501] {
// CHECK:STDOUT: %int_32.loc18_15: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc18_15: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %int_32.loc18_24: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc18_24: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %struct_type.a.b: type = struct_type {.a: %i32, .b: %i32} [concrete = constants.%struct_type.a.b.501]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a: ref %struct_type.a.b.501 = ref_binding a, %a.var
// CHECK:STDOUT: %G.ref: %G.type = name_ref G, file.%G.decl [concrete = constants.%G]
// CHECK:STDOUT: %cond.ref: bool = name_ref cond, %cond
// CHECK:STDOUT: if %cond.ref br !if.expr.then else br !if.expr.else
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.then:
// CHECK:STDOUT: %a.ref.loc19_18: ref %struct_type.a.b.501 = name_ref a, %a
// CHECK:STDOUT: %.loc19_18.1: ref %i32 = struct_access %a.ref.loc19_18, element0
// CHECK:STDOUT: %.loc19_18.2: %i32 = acquire_value %.loc19_18.1
// CHECK:STDOUT: %.loc19_18.3: ref %i32 = struct_access %a.ref.loc19_18, element1
// CHECK:STDOUT: %.loc19_18.4: %i32 = acquire_value %.loc19_18.3
// CHECK:STDOUT: %struct.loc19_18: %struct_type.a.b.501 = struct_value (%.loc19_18.2, %.loc19_18.4)
// CHECK:STDOUT: %.loc19_18.5: %struct_type.a.b.501 = converted %a.ref.loc19_18, %struct.loc19_18
// CHECK:STDOUT: br !if.expr.result(%.loc19_18.5)
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.else:
// CHECK:STDOUT: %a.ref.loc19_25: ref %struct_type.a.b.501 = name_ref a, %a
// CHECK:STDOUT: %.loc19_25.1: ref %i32 = struct_access %a.ref.loc19_25, element0
// CHECK:STDOUT: %.loc19_25.2: %i32 = acquire_value %.loc19_25.1
// CHECK:STDOUT: %.loc19_25.3: ref %i32 = struct_access %a.ref.loc19_25, element1
// CHECK:STDOUT: %.loc19_25.4: %i32 = acquire_value %.loc19_25.3
// CHECK:STDOUT: %struct.loc19_25: %struct_type.a.b.501 = struct_value (%.loc19_25.2, %.loc19_25.4)
// CHECK:STDOUT: %.loc19_20: %struct_type.a.b.501 = converted %a.ref.loc19_25, %struct.loc19_25
// CHECK:STDOUT: br !if.expr.result(%.loc19_20)
// CHECK:STDOUT:
// CHECK:STDOUT: !if.expr.result:
// CHECK:STDOUT: %.loc19_5: %struct_type.a.b.501 = block_arg !if.expr.result
// CHECK:STDOUT: %G.call: init %empty_tuple.type = call %G.ref(%.loc19_5)
// CHECK:STDOUT: %DestroyOp.bound: <bound method> = bound_method %a.var, constants.%DestroyOp
// CHECK:STDOUT: %DestroyOp.call: init %empty_tuple.type = call %DestroyOp.bound(%a.var)
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @DestroyOp(%self.param: ref %struct_type.a.b.501) = "no_op";
// CHECK:STDOUT:
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