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Implements proposal #7016: `self` moves from the deduced implicit list (`fn F[self: Self]()`) to the front of the explicit list. Its type may be written explicitly (`fn F(self: Self)`) or omitted, in which case it defaults to `Self` (`fn F(self)`, `fn F(ref self)`); `self` in the implicit list is rejected. Throughout checking, `self` is modeled as the first explicit parameter. Because a method is just a function whose first parameter is `self`, it can also be called as an ordinary function with the receiver passed explicitly (`Type.M(obj, ...)`), not only as `obj.M(...)`. A new `SemIR::CallArgParamPatterns` helper chooses the parameters matched against the explicit arguments, excluding a leading `self` only when it is supplied as a method-call receiver; arity checking, conversion, and generic deduction use it. The resulting SemIR and lowering are unchanged: `self` is still `call_param0`, and witnesses, thunks, and vtables are unaffected. An omitted `self` type is parsed as a `SelfBindingPattern` node with no type expression; checking synthesizes the `Self` type so it behaves exactly like `self: Self`. However, the exact spelling used must match between a forward declaration and a definition, following #3763's rules around declaration matching. Generated functions, thunks, and C++ interop import/export build `self` as the first explicit parameter, and the `self`-type override (e.g. Derived->Base for a virtual override) applies to the explicit `self`. Placement is validated by new diagnostics: `SelfInImplicitParamList`, `SelfNotFirstParam`, and `SelfOutsideParamList`. The benchmark source generator and the documentation adopt the `(self)` shorthand; the prelude, the examples, and the test data are migrated in the following commits. Assisted-by: Claude Code with Claude Opus 4.7 --------- Co-authored-by: josh11b <15258583+josh11b@users.noreply.github.com>
This commit is contained in:
Chandler Carruth
co-authored by
josh11b
josh11b
parent
fb05da761f
commit
7871237c15
@@ -0,0 +1,255 @@
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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.carbon
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// TODO: Add ranges and switch to "--dump-sem-ir-ranges=only".
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// EXTRA-ARGS: --dump-sem-ir-ranges=if-present
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/class/method/call_without_method_syntax.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/class/method/call_without_method_syntax.carbon
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// --- call_without_method_syntax.carbon
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library "[[@TEST_NAME]]";
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class Point {
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fn Get(self) -> i32 { return self.x; }
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fn First(self, unused other: Point) -> i32 { return self.x; }
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var x: i32;
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}
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// A method is a function whose first parameter is `self`, so it can be called
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// as an ordinary function by passing the receiver as the first explicit
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// argument. `Point.Get(p)` is equivalent to `p.Get()`.
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fn CallGet(p: Point) -> i32 {
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return Point.Get(p);
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}
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// The remaining explicit arguments follow the receiver.
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fn CallFirst(p: Point, q: Point) -> i32 {
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return Point.First(p, q);
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}
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// The same works through an alias of the method.
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fn CallViaAlias(p: Point) -> i32 {
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alias A = Point.Get;
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return A(p);
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}
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// CHECK:STDOUT: --- call_without_method_syntax.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %Point: type = class_type @Point [concrete]
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// CHECK:STDOUT: %pattern_type.9d8: type = pattern_type %Point [concrete]
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// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
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// CHECK:STDOUT: %Int.type: type = generic_class_type @Int [concrete]
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// CHECK:STDOUT: %Int.generic: %Int.type = struct_value () [concrete]
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// CHECK:STDOUT: %N: Core.IntLiteral = symbolic_binding N, 0 [symbolic]
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// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
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// CHECK:STDOUT: %.795: Core.Form = init_form %i32 [concrete]
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// CHECK:STDOUT: %pattern_type.6b6: type = pattern_type %i32 [concrete]
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// CHECK:STDOUT: %Point.Get.type: type = fn_type @Point.Get [concrete]
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// CHECK:STDOUT: %Point.Get: %Point.Get.type = struct_value () [concrete]
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// CHECK:STDOUT: %Point.First.type: type = fn_type @Point.First [concrete]
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// CHECK:STDOUT: %Point.First: %Point.First.type = struct_value () [concrete]
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// CHECK:STDOUT: %Point.elem: type = unbound_element_type %Point, %i32 [concrete]
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// CHECK:STDOUT: %struct_type.x: type = struct_type {.x: %i32} [concrete]
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// CHECK:STDOUT: %complete_type.0c6: <witness> = complete_type_witness %struct_type.x [concrete]
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// CHECK:STDOUT: %Copy.type: type = facet_type <@Copy> [concrete]
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// CHECK:STDOUT: %Int.as.Copy.impl.Op.type.ac8: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%N) [symbolic]
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// CHECK:STDOUT: %Int.as.Copy.impl.Op.5e0: %Int.as.Copy.impl.Op.type.ac8 = struct_value () [symbolic]
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// CHECK:STDOUT: %Copy.impl_witness.0e0: <witness> = impl_witness imports.%Copy.impl_witness_table.367, @Int.as.Copy.impl(%int_32) [concrete]
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// CHECK:STDOUT: %Int.as.Copy.impl.Op.type.3f6: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%int_32) [concrete]
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// CHECK:STDOUT: %Int.as.Copy.impl.Op.4f6: %Int.as.Copy.impl.Op.type.3f6 = struct_value () [concrete]
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// CHECK:STDOUT: %Copy.facet: %Copy.type = facet_value %i32, (%Copy.impl_witness.0e0) [concrete]
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// CHECK:STDOUT: %Copy.WithSelf.Op.type.d09: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet) [concrete]
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// CHECK:STDOUT: %.7a6: type = fn_type_with_self_type %Copy.WithSelf.Op.type.d09, %Copy.facet [concrete]
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// CHECK:STDOUT: %Int.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %Int.as.Copy.impl.Op.4f6, @Int.as.Copy.impl.Op(%int_32) [concrete]
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// CHECK:STDOUT: %CallGet.type: type = fn_type @CallGet [concrete]
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// CHECK:STDOUT: %CallGet: %CallGet.type = struct_value () [concrete]
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// CHECK:STDOUT: %CallFirst.type: type = fn_type @CallFirst [concrete]
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// CHECK:STDOUT: %CallFirst: %CallFirst.type = struct_value () [concrete]
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// CHECK:STDOUT: %CallViaAlias.type: type = fn_type @CallViaAlias [concrete]
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// CHECK:STDOUT: %CallViaAlias: %CallViaAlias.type = struct_value () [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: imports {
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// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
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// CHECK:STDOUT: .Int = %Core.Int
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// CHECK:STDOUT: .Copy = %Core.Copy
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// CHECK:STDOUT: import Core//prelude
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// CHECK:STDOUT: import Core//prelude/...
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Core.Int: %Int.type = import_ref Core//prelude/parts/int, Int, loaded [concrete = constants.%Int.generic]
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// CHECK:STDOUT: %Core.Copy: type = import_ref Core//prelude/parts/copy, Copy, loaded [concrete = constants.%Copy.type]
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// CHECK:STDOUT: %Core.import_ref.cd6: @Int.as.Copy.impl.%Int.as.Copy.impl.Op.type (%Int.as.Copy.impl.Op.type.ac8) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Int.as.Copy.impl.%Int.as.Copy.impl.Op (constants.%Int.as.Copy.impl.Op.5e0)]
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// CHECK:STDOUT: %Copy.impl_witness_table.367 = impl_witness_table (%Core.import_ref.cd6), @Int.as.Copy.impl [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: file {
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// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
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// CHECK:STDOUT: .Core = imports.%Core
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// CHECK:STDOUT: .Point = %Point.decl
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// CHECK:STDOUT: .CallGet = %CallGet.decl
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// CHECK:STDOUT: .CallFirst = %CallFirst.decl
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// CHECK:STDOUT: .CallViaAlias = %CallViaAlias.decl
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Core.import = import Core
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// CHECK:STDOUT: %Point.decl: type = class_decl @Point [concrete = constants.%Point] {} {}
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// CHECK:STDOUT: %CallGet.decl: %CallGet.type = fn_decl @CallGet [concrete = constants.%CallGet] {
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// CHECK:STDOUT: %p.param_patt: %pattern_type.9d8 = value_param_pattern [concrete]
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// CHECK:STDOUT: %p.patt: %pattern_type.9d8 = at_binding_pattern p, %p.param_patt [concrete]
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// CHECK:STDOUT: %return.param_patt: %pattern_type.6b6 = out_param_pattern [concrete]
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// CHECK:STDOUT: %return.patt: %pattern_type.6b6 = return_slot_pattern %return.param_patt, %i32 [concrete]
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// CHECK:STDOUT: } {
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// CHECK:STDOUT: %i32: type = type_literal constants.%i32 [concrete = constants.%i32]
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// CHECK:STDOUT: %.loc13: Core.Form = init_form %i32 [concrete = constants.%.795]
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// CHECK:STDOUT: %p.param: %Point = value_param call_param0
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// CHECK:STDOUT: %Point.ref.loc13: type = name_ref Point, file.%Point.decl [concrete = constants.%Point]
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// CHECK:STDOUT: %p: %Point = value_binding p, %p.param
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// CHECK:STDOUT: %return.param: ref %i32 = out_param call_param1
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// CHECK:STDOUT: %return: ref %i32 = return_slot %return.param
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %CallFirst.decl: %CallFirst.type = fn_decl @CallFirst [concrete = constants.%CallFirst] {
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// CHECK:STDOUT: %p.param_patt: %pattern_type.9d8 = value_param_pattern [concrete]
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// CHECK:STDOUT: %p.patt: %pattern_type.9d8 = at_binding_pattern p, %p.param_patt [concrete]
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// CHECK:STDOUT: %q.param_patt: %pattern_type.9d8 = value_param_pattern [concrete]
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// CHECK:STDOUT: %q.patt: %pattern_type.9d8 = at_binding_pattern q, %q.param_patt [concrete]
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// CHECK:STDOUT: %return.param_patt: %pattern_type.6b6 = out_param_pattern [concrete]
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// CHECK:STDOUT: %return.patt: %pattern_type.6b6 = return_slot_pattern %return.param_patt, %i32 [concrete]
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// CHECK:STDOUT: } {
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// CHECK:STDOUT: %i32: type = type_literal constants.%i32 [concrete = constants.%i32]
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// CHECK:STDOUT: %.loc18: Core.Form = init_form %i32 [concrete = constants.%.795]
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// CHECK:STDOUT: %p.param: %Point = value_param call_param0
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// CHECK:STDOUT: %Point.ref.loc18_17: type = name_ref Point, file.%Point.decl [concrete = constants.%Point]
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// CHECK:STDOUT: %p: %Point = value_binding p, %p.param
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// CHECK:STDOUT: %q.param: %Point = value_param call_param1
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// CHECK:STDOUT: %Point.ref.loc18_27: type = name_ref Point, file.%Point.decl [concrete = constants.%Point]
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// CHECK:STDOUT: %q: %Point = value_binding q, %q.param
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// CHECK:STDOUT: %return.param: ref %i32 = out_param call_param2
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// CHECK:STDOUT: %return: ref %i32 = return_slot %return.param
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %CallViaAlias.decl: %CallViaAlias.type = fn_decl @CallViaAlias [concrete = constants.%CallViaAlias] {
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// CHECK:STDOUT: %p.param_patt: %pattern_type.9d8 = value_param_pattern [concrete]
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// CHECK:STDOUT: %p.patt: %pattern_type.9d8 = at_binding_pattern p, %p.param_patt [concrete]
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// CHECK:STDOUT: %return.param_patt: %pattern_type.6b6 = out_param_pattern [concrete]
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// CHECK:STDOUT: %return.patt: %pattern_type.6b6 = return_slot_pattern %return.param_patt, %i32 [concrete]
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// CHECK:STDOUT: } {
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// CHECK:STDOUT: %i32: type = type_literal constants.%i32 [concrete = constants.%i32]
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// CHECK:STDOUT: %.loc23: Core.Form = init_form %i32 [concrete = constants.%.795]
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// CHECK:STDOUT: %p.param: %Point = value_param call_param0
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// CHECK:STDOUT: %Point.ref.loc23: type = name_ref Point, file.%Point.decl [concrete = constants.%Point]
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// CHECK:STDOUT: %p: %Point = value_binding p, %p.param
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// CHECK:STDOUT: %return.param: ref %i32 = out_param call_param1
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// CHECK:STDOUT: %return: ref %i32 = return_slot %return.param
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: class @Point {
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// CHECK:STDOUT: %Point.Get.decl: %Point.Get.type = fn_decl @Point.Get [concrete = constants.%Point.Get] {
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// CHECK:STDOUT: %self.param_patt: %pattern_type.9d8 = value_param_pattern [concrete]
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// CHECK:STDOUT: %self.patt: %pattern_type.9d8 = at_binding_pattern self, %self.param_patt [concrete]
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// CHECK:STDOUT: %return.param_patt: %pattern_type.6b6 = out_param_pattern [concrete]
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// CHECK:STDOUT: %return.patt: %pattern_type.6b6 = return_slot_pattern %return.param_patt, %i32 [concrete]
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// CHECK:STDOUT: } {
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// CHECK:STDOUT: %i32: type = type_literal constants.%i32 [concrete = constants.%i32]
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// CHECK:STDOUT: %.loc4_19: Core.Form = init_form %i32 [concrete = constants.%.795]
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// CHECK:STDOUT: %self.param: %Point = value_param call_param0
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// CHECK:STDOUT: %Self.ref: type = name_ref Self, constants.%Point [concrete = constants.%Point]
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// CHECK:STDOUT: %self: %Point = value_binding self, %self.param
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// CHECK:STDOUT: %return.param: ref %i32 = out_param call_param1
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// CHECK:STDOUT: %return: ref %i32 = return_slot %return.param
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Point.First.decl: %Point.First.type = fn_decl @Point.First [concrete = constants.%Point.First] {
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// CHECK:STDOUT: %self.param_patt: %pattern_type.9d8 = value_param_pattern [concrete]
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// CHECK:STDOUT: %self.patt: %pattern_type.9d8 = at_binding_pattern self, %self.param_patt [concrete]
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// CHECK:STDOUT: %other.param_patt: %pattern_type.9d8 = value_param_pattern [concrete]
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// CHECK:STDOUT: %other.patt: %pattern_type.9d8 = at_binding_pattern other, %other.param_patt [concrete]
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// CHECK:STDOUT: %return.param_patt: %pattern_type.6b6 = out_param_pattern [concrete]
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// CHECK:STDOUT: %return.patt: %pattern_type.6b6 = return_slot_pattern %return.param_patt, %i32 [concrete]
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// CHECK:STDOUT: } {
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// CHECK:STDOUT: %i32: type = type_literal constants.%i32 [concrete = constants.%i32]
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// CHECK:STDOUT: %.loc5_42: Core.Form = init_form %i32 [concrete = constants.%.795]
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// CHECK:STDOUT: %self.param: %Point = value_param call_param0
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// CHECK:STDOUT: %Self.ref: type = name_ref Self, constants.%Point [concrete = constants.%Point]
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// CHECK:STDOUT: %self: %Point = value_binding self, %self.param
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// CHECK:STDOUT: %other.param: %Point = value_param call_param1
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// CHECK:STDOUT: %Point.ref: type = name_ref Point, file.%Point.decl [concrete = constants.%Point]
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// CHECK:STDOUT: %other: %Point = value_binding other, %other.param
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// CHECK:STDOUT: %return.param: ref %i32 = out_param call_param2
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// CHECK:STDOUT: %return: ref %i32 = return_slot %return.param
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %.loc7: %Point.elem = field_decl x, element0 [concrete]
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// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness constants.%struct_type.x [concrete = constants.%complete_type.0c6]
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// CHECK:STDOUT: complete_type_witness = %complete_type
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: .Self = constants.%Point
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// CHECK:STDOUT: .Get = %Point.Get.decl
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// CHECK:STDOUT: .Point = <poisoned>
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// CHECK:STDOUT: .First = %Point.First.decl
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// CHECK:STDOUT: .x = %.loc7
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @Point.Get(%self.param: %Point) -> out %return.param: %i32 {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %self.ref: %Point = name_ref self, %self
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// CHECK:STDOUT: %x.ref: %Point.elem = name_ref x, @Point.%.loc7 [concrete = @Point.%.loc7]
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// CHECK:STDOUT: %.loc4_36.1: ref %i32 = class_element_access %self.ref, element0
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// CHECK:STDOUT: %.loc4_36.2: %i32 = acquire_value %.loc4_36.1
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// CHECK:STDOUT: %impl.elem0: %.7a6 = impl_witness_access constants.%Copy.impl_witness.0e0, element0 [concrete = constants.%Int.as.Copy.impl.Op.4f6]
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// CHECK:STDOUT: %bound_method.loc4_36.1: <bound method> = bound_method %.loc4_36.2, %impl.elem0
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// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @Int.as.Copy.impl.Op(constants.%int_32) [concrete = constants.%Int.as.Copy.impl.Op.specific_fn]
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// CHECK:STDOUT: %bound_method.loc4_36.2: <bound method> = bound_method %.loc4_36.2, %specific_fn
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// CHECK:STDOUT: %Int.as.Copy.impl.Op.call: init %i32 = call %bound_method.loc4_36.2(%.loc4_36.2)
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// CHECK:STDOUT: return %Int.as.Copy.impl.Op.call
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @Point.First(%self.param: %Point, %other.param: %Point) -> out %return.param: %i32 {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %self.ref: %Point = name_ref self, %self
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// CHECK:STDOUT: %x.ref: %Point.elem = name_ref x, @Point.%.loc7 [concrete = @Point.%.loc7]
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// CHECK:STDOUT: %.loc5_59.1: ref %i32 = class_element_access %self.ref, element0
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// CHECK:STDOUT: %.loc5_59.2: %i32 = acquire_value %.loc5_59.1
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// CHECK:STDOUT: %impl.elem0: %.7a6 = impl_witness_access constants.%Copy.impl_witness.0e0, element0 [concrete = constants.%Int.as.Copy.impl.Op.4f6]
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// CHECK:STDOUT: %bound_method.loc5_59.1: <bound method> = bound_method %.loc5_59.2, %impl.elem0
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// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @Int.as.Copy.impl.Op(constants.%int_32) [concrete = constants.%Int.as.Copy.impl.Op.specific_fn]
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// CHECK:STDOUT: %bound_method.loc5_59.2: <bound method> = bound_method %.loc5_59.2, %specific_fn
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// CHECK:STDOUT: %Int.as.Copy.impl.Op.call: init %i32 = call %bound_method.loc5_59.2(%.loc5_59.2)
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// CHECK:STDOUT: return %Int.as.Copy.impl.Op.call
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @CallGet(%p.param: %Point) -> out %return.param: %i32 {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: %Point.ref.loc14: type = name_ref Point, file.%Point.decl [concrete = constants.%Point]
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// CHECK:STDOUT: %Get.ref: %Point.Get.type = name_ref Get, @Point.%Point.Get.decl [concrete = constants.%Point.Get]
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// CHECK:STDOUT: %p.ref: %Point = name_ref p, %p
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// CHECK:STDOUT: %Point.Get.call: init %i32 = call %Get.ref(%p.ref)
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// CHECK:STDOUT: return %Point.Get.call
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @CallFirst(%p.param: %Point, %q.param: %Point) -> out %return.param: %i32 {
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// CHECK:STDOUT: !entry:
|
||||
// CHECK:STDOUT: %Point.ref.loc19: type = name_ref Point, file.%Point.decl [concrete = constants.%Point]
|
||||
// CHECK:STDOUT: %First.ref: %Point.First.type = name_ref First, @Point.%Point.First.decl [concrete = constants.%Point.First]
|
||||
// CHECK:STDOUT: %p.ref: %Point = name_ref p, %p
|
||||
// CHECK:STDOUT: %q.ref: %Point = name_ref q, %q
|
||||
// CHECK:STDOUT: %Point.First.call: init %i32 = call %First.ref(%p.ref, %q.ref)
|
||||
// CHECK:STDOUT: return %Point.First.call
|
||||
// CHECK:STDOUT: }
|
||||
// CHECK:STDOUT:
|
||||
// CHECK:STDOUT: fn @CallViaAlias(%p.param: %Point) -> out %return.param: %i32 {
|
||||
// CHECK:STDOUT: !entry:
|
||||
// CHECK:STDOUT: %Point.ref.loc24: type = name_ref Point, file.%Point.decl [concrete = constants.%Point]
|
||||
// CHECK:STDOUT: %Get.ref: %Point.Get.type = name_ref Get, @Point.%Point.Get.decl [concrete = constants.%Point.Get]
|
||||
// CHECK:STDOUT: %A: %Point.Get.type = alias_binding A, %Get.ref [concrete = constants.%Point.Get]
|
||||
// CHECK:STDOUT: %A.ref: %Point.Get.type = name_ref A, %A [concrete = constants.%Point.Get]
|
||||
// CHECK:STDOUT: %p.ref: %Point = name_ref p, %p
|
||||
// CHECK:STDOUT: %Point.Get.call: init %i32 = call %A.ref(%p.ref)
|
||||
// CHECK:STDOUT: return %Point.Get.call
|
||||
// CHECK:STDOUT: }
|
||||
// CHECK:STDOUT:
|
||||
Reference in New Issue
Block a user