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carbon-lang/toolchain/check/testdata/where_expr/equal_rewrite.carbon
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Dana Jansens 46bb0fecd4 Properly diagnose ambiguous .Self in T impls X where... (#7132) 
A `where` expression nested inside a `T impls X` constraint makes
`.Self` ambiguous on the right-hand side of the `where` if `T` is
anything other than `.Self`. After the `where`, the value of a `.Self`
could be `T` or could be the value of `.Self` before the `impls`
constraint: the so-called top-level value of `.Self`.

Implicit use of `.Self` in designators is always allowed, and they are
bound (and replaced by a reference) to the inner-most possible value of
`.Self`. On the right-hand side of the nested `where` above, they have
the value `T as X`.

`.Self impls ...` is also always allowed, since it acts more as a
keyword here, and it always refers to the inner-most possible value of
`.Self`.

Any other explicit use of `.Self` is diagnosed when ambiguous, in any
kind of constraint. This is done in the handling of `WhereExpr` since it
has enough context to allow `.Self impls` (which is an explicit use)
while disallowing other explicit uses. And because it has non-canonical
instructions to work with, so it is able to diagnose errors with precise
locations.

Since `.Self` is no longer going to be marked with depth modifiers, the
eval of `WhereExpr` does not need an input facet value instruction
representing `.Self` to compare with, as they are now going to all be
equivalent. So revert it back to just looking for the `PeriodSelf` name
id, through a shared helper being introduced as `IsPeriodSelf`. And drop
the period self InstId from the `WhereExpr` instruction. This causes
most of the formatted SemIR changes.

Move helpers for working with and replacing `.Self` to their own file,
out of the `facet_type.h` header/cpp files. These are working with
`.Self` facet values more than facet types, though `.Self` is a name
that only exists inside the scope of a facet type.
2026-05-01 21:22:32 +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
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/where_expr/equal_rewrite.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/where_expr/equal_rewrite.carbon
// --- equal_constraint.carbon
library "[[@TEST_NAME]]";
interface N {
let P:! type;
}
//@dump-sem-ir-begin
fn Equal(T:! N where .P = {});
//@dump-sem-ir-end
// --- nested_rewrites.carbon
library "[[@TEST_NAME]]";
interface A {
let B:! type;
let C:! type;
}
//@dump-sem-ir-begin
fn NestedRewrite(D:! (A where .B = bool) where .C = ());
//@dump-sem-ir-end
// --- repeated_rewrite.carbon
library "[[@TEST_NAME]]";
interface E {
let F:! type;
}
//@dump-sem-ir-begin
fn OneRewrite(unused G:! E where .F = i32) {}
fn RepeatedRewrite(H:! E where .F = i32 and .F = i32) {
//@dump-sem-ir-end
OneRewrite(H);
}
fn OneRewriteAgain(I:! E where .F = i32) {
RepeatedRewrite(I);
}
// --- rewrites_reordered.carbon
library "[[@TEST_NAME]]";
interface J {
let K:! type;
let L:! type;
}
//@dump-sem-ir-begin
fn Alphabetical(unused M:! J where .K = () and .L = bool) {}
fn Reversed(N:! J where .L = bool and .K = ()) {
//@dump-sem-ir-end
Alphabetical(N);
}
// --- fail_rewrites_mismatch_right.carbon
library "[[@TEST_NAME]]";
interface O {
let P:! type;
}
fn WithInteger(unused Q:! O where .P = i32) {}
fn WithBool(R:! O where .P = bool) {
// CHECK:STDERR: fail_rewrites_mismatch_right.carbon:[[@LINE+7]]:3: error: cannot convert type `R` that implements `O where .(O.P) = bool` into type implementing `O where .(O.P) = i32` [ConversionFailureFacetToFacet]
// CHECK:STDERR: WithInteger(R);
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR: fail_rewrites_mismatch_right.carbon:[[@LINE-6]]:23: note: initializing generic parameter `Q` declared here [InitializingGenericParam]
// CHECK:STDERR: fn WithInteger(unused Q:! O where .P = i32) {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
WithInteger(R);
}
// --- fail_rewrites_mismatch_left.carbon
library "[[@TEST_NAME]]";
interface S {
let T:! type;
let U:! type;
}
fn WithT(unused V:! S where .T = ()) {}
fn WithU(W:! S where .U = ()) {
// CHECK:STDERR: fail_rewrites_mismatch_left.carbon:[[@LINE+7]]:3: error: cannot convert type `W` that implements `S where .(S.U) = ()` into type implementing `S where .(S.T) = ()` [ConversionFailureFacetToFacet]
// CHECK:STDERR: WithT(W);
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR: fail_rewrites_mismatch_left.carbon:[[@LINE-6]]:17: note: initializing generic parameter `V` declared here [InitializingGenericParam]
// CHECK:STDERR: fn WithT(unused V:! S where .T = ()) {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
WithT(W);
}
// --- fail_import_rewrites.carbon
library "[[@TEST_NAME]]";
import library "equal_constraint";
import library "nested_rewrites";
fn Calls() {
// CHECK:STDERR: fail_import_rewrites.carbon:[[@LINE+8]]:3: error: cannot convert type `bool` into type implementing `N where .(N.P) = {}` [ConversionFailureTypeToFacet]
// CHECK:STDERR: Equal(bool);
// CHECK:STDERR: ^~~~~~~~~~~
// CHECK:STDERR: fail_import_rewrites.carbon:[[@LINE-7]]:1: in import [InImport]
// CHECK:STDERR: equal_constraint.carbon:9:10: note: initializing generic parameter `T` declared here [InitializingGenericParam]
// CHECK:STDERR: fn Equal(T:! N where .P = {});
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
Equal(bool);
// CHECK:STDERR: fail_import_rewrites.carbon:[[@LINE+8]]:3: error: cannot convert type `i32` into type implementing `A where .(A.C) = () and .(A.B) = bool` [ConversionFailureTypeToFacet]
// CHECK:STDERR: NestedRewrite(i32);
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~
// CHECK:STDERR: fail_import_rewrites.carbon:[[@LINE-17]]:1: in import [InImport]
// CHECK:STDERR: nested_rewrites.carbon:10:18: note: initializing generic parameter `D` declared here [InitializingGenericParam]
// CHECK:STDERR: fn NestedRewrite(D:! (A where .B = bool) where .C = ());
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
NestedRewrite(i32);
}
// --- fail_check_rewrite_constraints.carbon
library "[[@TEST_NAME]]";
interface I {
let Member:! type;
}
// `2` can't be converted to the type of `I.Member`
// CHECK:STDERR: fail_check_rewrite_constraints.carbon:[[@LINE+7]]:46: error: cannot implicitly convert non-type value of type `Core.IntLiteral` to `type` [ConversionFailureNonTypeToFacet]
// CHECK:STDERR: fn RewriteTypeMismatch(X:! I where .Member = 2);
// CHECK:STDERR: ^
// CHECK:STDERR: fail_check_rewrite_constraints.carbon:[[@LINE+4]]:46: note: type `Core.IntLiteral` does not implement interface `Core.ImplicitAs(type)` [MissingImplInMemberAccessInContext]
// CHECK:STDERR: fn RewriteTypeMismatch(X:! I where .Member = 2);
// CHECK:STDERR: ^
// CHECK:STDERR:
fn RewriteTypeMismatch(X:! I where .Member = 2);
// --- fail_todo_let.carbon
library "[[@TEST_NAME]]";
interface A {}
class D {}
impl D as A {}
fn F() {
// CHECK:STDERR: fail_todo_let.carbon:[[@LINE+4]]:7: error: semantics TODO: `local `let :!` bindings are currently unsupported` [SemanticsTodo]
// CHECK:STDERR: let E:! type where .Self impls A = D;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
let E:! type where .Self impls A = D;
}
// --- fail_todo_let_compile_time.carbon
library "[[@TEST_NAME]]";
interface A {}
class D {}
impl D as A {}
// TODO: Compile-time binding are not yet supported at file scope.
// CHECK:STDERR: fail_todo_let_compile_time.carbon:[[@LINE+4]]:5: error: semantics TODO: ``let` compile time binding outside function or interface` [SemanticsTodo]
// CHECK:STDERR: let B:! type where .Self impls A = D;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
let B:! type where .Self impls A = D;
// --- fail_type_does_not_implement_where.carbon
library "[[@TEST_NAME]]";
interface E {
let F:! type;
let G:! type;
}
// Testing how these types get stringified in error messages.
// TODO: This should be a compile-time binding, once that is supported.
// CHECK:STDERR: fail_type_does_not_implement_where.carbon:[[@LINE+4]]:42: error: cannot convert type `f64` into type implementing `E where .(E.F) = bool and .(E.G) = ()` [ConversionFailureTypeToFacet]
// CHECK:STDERR: let H: (E where .F = bool and .G = ()) = f64;
// CHECK:STDERR: ^~~
// CHECK:STDERR:
let H: (E where .F = bool and .G = ()) = f64;
// CHECK:STDERR: fail_type_does_not_implement_where.carbon:[[@LINE+4]]:45: error: cannot convert type `bool` into type implementing `E where .(E.F) = {} and .(E.G) = i32` [ConversionFailureTypeToFacet]
// CHECK:STDERR: let J: ((E where .F = {}) where .G = i32) = bool;
// CHECK:STDERR: ^~~~
// CHECK:STDERR:
let J: ((E where .F = {}) where .G = i32) = bool;
// CHECK:STDERR: fail_type_does_not_implement_where.carbon:[[@LINE+4]]:33: error: cannot convert type `bool` into type implementing `E where .(E.F) = .(E.G)` [ConversionFailureTypeToFacet]
// CHECK:STDERR: let K: (E where .F = .Self.G) = bool;
// CHECK:STDERR: ^~~~
// CHECK:STDERR:
let K: (E where .F = .Self.G) = bool;
// CHECK:STDOUT: --- equal_constraint.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %N.type: type = facet_type <@N> [concrete]
// CHECK:STDOUT: %N.assoc_type: type = assoc_entity_type @N [concrete]
// CHECK:STDOUT: %assoc0: %N.assoc_type = assoc_entity element0, @N.WithSelf.%P [concrete]
// CHECK:STDOUT: %.Self.245: %N.type = symbolic_binding .Self [symbolic_self]
// CHECK:STDOUT: %.Self.as_type: type = facet_access_type %.Self.245 [symbolic_self]
// CHECK:STDOUT: %N.lookup_impl_witness: <witness> = lookup_impl_witness %.Self.245, @N [symbolic_self]
// CHECK:STDOUT: %impl.elem0: type = impl_witness_access %N.lookup_impl_witness, element0 [symbolic_self]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %empty_struct: %empty_struct_type = struct_value () [concrete]
// CHECK:STDOUT: %N_where.type: type = facet_type <@N where %impl.elem0 = %empty_struct_type> [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %N_where.type [concrete]
// CHECK:STDOUT: %T: %N_where.type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %Equal.type: type = fn_type @Equal [concrete]
// CHECK:STDOUT: %Equal: %Equal.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %Equal.decl: %Equal.type = fn_decl @Equal [concrete = constants.%Equal] {
// CHECK:STDOUT: %T.patt: %pattern_type = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc9_16.1: type = splice_block %.loc9_16.2 [concrete = constants.%N_where.type] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %N.ref: type = name_ref N, file.%N.decl [concrete = constants.%N.type]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %.Self.ref: %N.type = name_ref .Self, %.Self.2 [symbolic_self = constants.%.Self.245]
// CHECK:STDOUT: %.Self.as_type: type = facet_access_type %.Self.ref [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %.loc9_22: type = converted %.Self.ref, %.Self.as_type [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %P.ref: %N.assoc_type = name_ref P, @P.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT: %impl.elem0: type = impl_witness_access constants.%N.lookup_impl_witness, element0 [symbolic_self = constants.%impl.elem0]
// CHECK:STDOUT: %.loc9_28.1: %empty_struct_type = struct_literal () [concrete = constants.%empty_struct]
// CHECK:STDOUT: %.loc9_28.2: type = converted %.loc9_28.1, constants.%empty_struct_type [concrete = constants.%empty_struct_type]
// CHECK:STDOUT: %.loc9_16.2: type = where_expr [concrete = constants.%N_where.type] {
// CHECK:STDOUT: requirement_base_facet_type %N.ref
// CHECK:STDOUT: requirement_rewrite %impl.elem0, %.loc9_28.2
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc9_11.2: %N_where.type = symbolic_binding T, 0 [symbolic = %T.loc9_11.1 (constants.%T)]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @Equal(%T.loc9_11.2: %N_where.type) {
// CHECK:STDOUT: %T.loc9_11.1: %N_where.type = symbolic_binding T, 0 [symbolic = %T.loc9_11.1 (constants.%T)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn();
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Equal(constants.%T) {
// CHECK:STDOUT: %T.loc9_11.1 => constants.%T
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- nested_rewrites.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %A.type: type = facet_type <@A> [concrete]
// CHECK:STDOUT: %A.assoc_type: type = assoc_entity_type @A [concrete]
// CHECK:STDOUT: %assoc0: %A.assoc_type = assoc_entity element0, @A.WithSelf.%B [concrete]
// CHECK:STDOUT: %assoc1: %A.assoc_type = assoc_entity element1, @A.WithSelf.%C [concrete]
// CHECK:STDOUT: %.Self.091: %A.type = symbolic_binding .Self [symbolic_self]
// CHECK:STDOUT: %.Self.as_type: type = facet_access_type %.Self.091 [symbolic_self]
// CHECK:STDOUT: %A.lookup_impl_witness: <witness> = lookup_impl_witness %.Self.091, @A [symbolic_self]
// CHECK:STDOUT: %impl.elem0: type = impl_witness_access %A.lookup_impl_witness, element0 [symbolic_self]
// CHECK:STDOUT: %A_where.type.f51: type = facet_type <@A where %impl.elem0 = bool> [concrete]
// CHECK:STDOUT: %impl.elem1: type = impl_witness_access %A.lookup_impl_witness, element1 [symbolic_self]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %empty_tuple: %empty_tuple.type = tuple_value () [concrete]
// CHECK:STDOUT: %A_where.type.321: type = facet_type <@A where %impl.elem0 = bool and %impl.elem1 = %empty_tuple.type> [concrete]
// CHECK:STDOUT: %pattern_type.725: type = pattern_type %A_where.type.321 [concrete]
// CHECK:STDOUT: %D: %A_where.type.321 = symbolic_binding D, 0 [symbolic]
// CHECK:STDOUT: %NestedRewrite.type: type = fn_type @NestedRewrite [concrete]
// CHECK:STDOUT: %NestedRewrite: %NestedRewrite.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %NestedRewrite.decl: %NestedRewrite.type = fn_decl @NestedRewrite [concrete = constants.%NestedRewrite] {
// CHECK:STDOUT: %D.patt: %pattern_type.725 = symbolic_binding_pattern D, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc10_42.1: type = splice_block %.loc10_42.2 [concrete = constants.%A_where.type.321] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %A.ref: type = name_ref A, file.%A.decl [concrete = constants.%A.type]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %.Self.ref.loc10_31: %A.type = name_ref .Self, %.Self.2 [symbolic_self = constants.%.Self.091]
// CHECK:STDOUT: %.Self.as_type.loc10_31: type = facet_access_type %.Self.ref.loc10_31 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %.loc10_31: type = converted %.Self.ref.loc10_31, %.Self.as_type.loc10_31 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %B.ref: %A.assoc_type = name_ref B, @B.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT: %impl.elem0: type = impl_witness_access constants.%A.lookup_impl_witness, element0 [symbolic_self = constants.%impl.elem0]
// CHECK:STDOUT: %.loc10_36: type = type_literal bool [concrete = bool]
// CHECK:STDOUT: %.loc10_25: type = where_expr [concrete = constants.%A_where.type.f51] {
// CHECK:STDOUT: requirement_base_facet_type %A.ref
// CHECK:STDOUT: requirement_rewrite %impl.elem0, %.loc10_36
// CHECK:STDOUT: }
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %.Self.ref.loc10_48: %A.type = name_ref .Self, %.Self.3 [symbolic_self = constants.%.Self.091]
// CHECK:STDOUT: %.Self.as_type.loc10_48: type = facet_access_type %.Self.ref.loc10_48 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %.loc10_48: type = converted %.Self.ref.loc10_48, %.Self.as_type.loc10_48 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %C.ref: %A.assoc_type = name_ref C, @C.%assoc1 [concrete = constants.%assoc1]
// CHECK:STDOUT: %impl.elem1: type = impl_witness_access constants.%A.lookup_impl_witness, element1 [symbolic_self = constants.%impl.elem1]
// CHECK:STDOUT: %.loc10_54.1: %empty_tuple.type = tuple_literal () [concrete = constants.%empty_tuple]
// CHECK:STDOUT: %.loc10_54.2: type = converted %.loc10_54.1, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT: %.loc10_42.2: type = where_expr [concrete = constants.%A_where.type.321] {
// CHECK:STDOUT: requirement_base_facet_type %.loc10_25
// CHECK:STDOUT: requirement_rewrite %impl.elem1, %.loc10_54.2
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: %D.loc10_19.2: %A_where.type.321 = symbolic_binding D, 0 [symbolic = %D.loc10_19.1 (constants.%D)]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @NestedRewrite(%D.loc10_19.2: %A_where.type.321) {
// CHECK:STDOUT: %D.loc10_19.1: %A_where.type.321 = symbolic_binding D, 0 [symbolic = %D.loc10_19.1 (constants.%D)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn();
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @NestedRewrite(constants.%D) {
// CHECK:STDOUT: %D.loc10_19.1 => constants.%D
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- repeated_rewrite.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %E.type: type = facet_type <@E> [concrete]
// CHECK:STDOUT: %E.assoc_type: type = assoc_entity_type @E [concrete]
// CHECK:STDOUT: %assoc0: %E.assoc_type = assoc_entity element0, @E.WithSelf.%F [concrete]
// CHECK:STDOUT: %.Self.7f5: %E.type = symbolic_binding .Self [symbolic_self]
// CHECK:STDOUT: %.Self.as_type: type = facet_access_type %.Self.7f5 [symbolic_self]
// CHECK:STDOUT: %E.lookup_impl_witness: <witness> = lookup_impl_witness %.Self.7f5, @E [symbolic_self]
// CHECK:STDOUT: %impl.elem0: type = impl_witness_access %E.lookup_impl_witness, element0 [symbolic_self]
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT: %E_where.type: type = facet_type <@E where %impl.elem0 = %i32> [concrete]
// CHECK:STDOUT: %pattern_type.606: type = pattern_type %E_where.type [concrete]
// CHECK:STDOUT: %G: %E_where.type = symbolic_binding G, 0 [symbolic]
// CHECK:STDOUT: %OneRewrite.type: type = fn_type @OneRewrite [concrete]
// CHECK:STDOUT: %OneRewrite: %OneRewrite.type = struct_value () [concrete]
// CHECK:STDOUT: %H: %E_where.type = symbolic_binding H, 0 [symbolic]
// CHECK:STDOUT: %RepeatedRewrite.type: type = fn_type @RepeatedRewrite [concrete]
// CHECK:STDOUT: %RepeatedRewrite: %RepeatedRewrite.type = struct_value () [concrete]
// CHECK:STDOUT: %I: %E_where.type = symbolic_binding I, 0 [symbolic]
// CHECK:STDOUT: %OneRewrite.specific_fn.43f8b6.2: <specific function> = specific_function %OneRewrite, @OneRewrite(%I) [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %OneRewrite.decl: %OneRewrite.type = fn_decl @OneRewrite [concrete = constants.%OneRewrite] {
// CHECK:STDOUT: %G.patt: %pattern_type.606 = symbolic_binding_pattern G, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc9_28.1: type = splice_block %.loc9_28.2 [concrete = constants.%E_where.type] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %E.ref: type = name_ref E, file.%E.decl [concrete = constants.%E.type]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %.Self.ref: %E.type = name_ref .Self, %.Self.2 [symbolic_self = constants.%.Self.7f5]
// CHECK:STDOUT: %.Self.as_type: type = facet_access_type %.Self.ref [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %.loc9_34: type = converted %.Self.ref, %.Self.as_type [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %F.ref: %E.assoc_type = name_ref F, @F.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT: %impl.elem0: type = impl_witness_access constants.%E.lookup_impl_witness, element0 [symbolic_self = constants.%impl.elem0]
// CHECK:STDOUT: %i32: type = type_literal constants.%i32 [concrete = constants.%i32]
// CHECK:STDOUT: %.loc9_28.2: type = where_expr [concrete = constants.%E_where.type] {
// CHECK:STDOUT: requirement_base_facet_type %E.ref
// CHECK:STDOUT: requirement_rewrite %impl.elem0, %i32
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: %G.loc9_23.2: %E_where.type = symbolic_binding G, 0 [symbolic = %G.loc9_23.1 (constants.%G)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %RepeatedRewrite.decl: %RepeatedRewrite.type = fn_decl @RepeatedRewrite [concrete = constants.%RepeatedRewrite] {
// CHECK:STDOUT: %H.patt: %pattern_type.606 = symbolic_binding_pattern H, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc11_26.1: type = splice_block %.loc11_26.2 [concrete = constants.%E_where.type] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %E.ref: type = name_ref E, file.%E.decl [concrete = constants.%E.type]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %.Self.ref.loc11_32: %E.type = name_ref .Self, %.Self.2 [symbolic_self = constants.%.Self.7f5]
// CHECK:STDOUT: %.Self.as_type.loc11_32: type = facet_access_type %.Self.ref.loc11_32 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %.loc11_32: type = converted %.Self.ref.loc11_32, %.Self.as_type.loc11_32 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %F.ref.loc11_32: %E.assoc_type = name_ref F, @F.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT: %impl.elem0.loc11_32: type = impl_witness_access constants.%E.lookup_impl_witness, element0 [symbolic_self = constants.%impl.elem0]
// CHECK:STDOUT: %i32.loc11_37: type = type_literal constants.%i32 [concrete = constants.%i32]
// CHECK:STDOUT: %.Self.ref.loc11_45: %E.type = name_ref .Self, %.Self.2 [symbolic_self = constants.%.Self.7f5]
// CHECK:STDOUT: %.Self.as_type.loc11_45: type = facet_access_type %.Self.ref.loc11_45 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %.loc11_45: type = converted %.Self.ref.loc11_45, %.Self.as_type.loc11_45 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %F.ref.loc11_45: %E.assoc_type = name_ref F, @F.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT: %impl.elem0.loc11_45: type = impl_witness_access constants.%E.lookup_impl_witness, element0 [symbolic_self = constants.%impl.elem0]
// CHECK:STDOUT: %impl.elem0.subst: type = impl_witness_access_substituted %impl.elem0.loc11_45, %i32.loc11_37 [concrete = constants.%i32]
// CHECK:STDOUT: %i32.loc11_50: type = type_literal constants.%i32 [concrete = constants.%i32]
// CHECK:STDOUT: %.loc11_26.2: type = where_expr [concrete = constants.%E_where.type] {
// CHECK:STDOUT: requirement_base_facet_type %E.ref
// CHECK:STDOUT: requirement_rewrite %impl.elem0.loc11_32, %i32.loc11_37
// CHECK:STDOUT: requirement_rewrite %impl.elem0.subst, %i32.loc11_50
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: %H.loc11_21.2: %E_where.type = symbolic_binding H, 0 [symbolic = %H.loc11_21.1 (constants.%H)]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @OneRewrite(%G.loc9_23.2: %E_where.type) {
// CHECK:STDOUT: %G.loc9_23.1: %E_where.type = symbolic_binding G, 0 [symbolic = %G.loc9_23.1 (constants.%G)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @RepeatedRewrite(%H.loc11_21.2: %E_where.type) {
// CHECK:STDOUT: %H.loc11_21.1: %E_where.type = symbolic_binding H, 0 [symbolic = %H.loc11_21.1 (constants.%H)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: <elided>
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @OneRewrite(constants.%G) {
// CHECK:STDOUT: %G.loc9_23.1 => constants.%G
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @RepeatedRewrite(constants.%H) {
// CHECK:STDOUT: %H.loc11_21.1 => constants.%H
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @OneRewrite(constants.%H) {
// CHECK:STDOUT: %G.loc9_23.1 => constants.%H
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @RepeatedRewrite(constants.%I) {
// CHECK:STDOUT: %H.loc11_21.1 => constants.%I
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %OneRewrite.specific_fn.loc13_3.2 => constants.%OneRewrite.specific_fn.43f8b6.2
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @OneRewrite(constants.%I) {
// CHECK:STDOUT: %G.loc9_23.1 => constants.%I
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- rewrites_reordered.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %J.type: type = facet_type <@J> [concrete]
// CHECK:STDOUT: %J.assoc_type: type = assoc_entity_type @J [concrete]
// CHECK:STDOUT: %assoc0: %J.assoc_type = assoc_entity element0, @J.WithSelf.%K [concrete]
// CHECK:STDOUT: %assoc1: %J.assoc_type = assoc_entity element1, @J.WithSelf.%L [concrete]
// CHECK:STDOUT: %.Self.2fa: %J.type = symbolic_binding .Self [symbolic_self]
// CHECK:STDOUT: %.Self.as_type: type = facet_access_type %.Self.2fa [symbolic_self]
// CHECK:STDOUT: %J.lookup_impl_witness: <witness> = lookup_impl_witness %.Self.2fa, @J [symbolic_self]
// CHECK:STDOUT: %impl.elem0: type = impl_witness_access %J.lookup_impl_witness, element0 [symbolic_self]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %empty_tuple: %empty_tuple.type = tuple_value () [concrete]
// CHECK:STDOUT: %impl.elem1: type = impl_witness_access %J.lookup_impl_witness, element1 [symbolic_self]
// CHECK:STDOUT: %J_where.type: type = facet_type <@J where %impl.elem0 = %empty_tuple.type and %impl.elem1 = bool> [concrete]
// CHECK:STDOUT: %pattern_type.a2c: type = pattern_type %J_where.type [concrete]
// CHECK:STDOUT: %M: %J_where.type = symbolic_binding M, 0 [symbolic]
// CHECK:STDOUT: %Alphabetical.type: type = fn_type @Alphabetical [concrete]
// CHECK:STDOUT: %Alphabetical: %Alphabetical.type = struct_value () [concrete]
// CHECK:STDOUT: %N: %J_where.type = symbolic_binding N, 0 [symbolic]
// CHECK:STDOUT: %Reversed.type: type = fn_type @Reversed [concrete]
// CHECK:STDOUT: %Reversed: %Reversed.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %Alphabetical.decl: %Alphabetical.type = fn_decl @Alphabetical [concrete = constants.%Alphabetical] {
// CHECK:STDOUT: %M.patt: %pattern_type.a2c = symbolic_binding_pattern M, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc10_30.1: type = splice_block %.loc10_30.2 [concrete = constants.%J_where.type] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %J.ref: type = name_ref J, file.%J.decl [concrete = constants.%J.type]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %.Self.ref.loc10_36: %J.type = name_ref .Self, %.Self.2 [symbolic_self = constants.%.Self.2fa]
// CHECK:STDOUT: %.Self.as_type.loc10_36: type = facet_access_type %.Self.ref.loc10_36 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %.loc10_36: type = converted %.Self.ref.loc10_36, %.Self.as_type.loc10_36 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %K.ref: %J.assoc_type = name_ref K, @K.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT: %impl.elem0: type = impl_witness_access constants.%J.lookup_impl_witness, element0 [symbolic_self = constants.%impl.elem0]
// CHECK:STDOUT: %.loc10_42.1: %empty_tuple.type = tuple_literal () [concrete = constants.%empty_tuple]
// CHECK:STDOUT: %.loc10_42.2: type = converted %.loc10_42.1, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT: %.Self.ref.loc10_48: %J.type = name_ref .Self, %.Self.2 [symbolic_self = constants.%.Self.2fa]
// CHECK:STDOUT: %.Self.as_type.loc10_48: type = facet_access_type %.Self.ref.loc10_48 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %.loc10_48: type = converted %.Self.ref.loc10_48, %.Self.as_type.loc10_48 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %L.ref: %J.assoc_type = name_ref L, @L.%assoc1 [concrete = constants.%assoc1]
// CHECK:STDOUT: %impl.elem1: type = impl_witness_access constants.%J.lookup_impl_witness, element1 [symbolic_self = constants.%impl.elem1]
// CHECK:STDOUT: %.loc10_53: type = type_literal bool [concrete = bool]
// CHECK:STDOUT: %.loc10_30.2: type = where_expr [concrete = constants.%J_where.type] {
// CHECK:STDOUT: requirement_base_facet_type %J.ref
// CHECK:STDOUT: requirement_rewrite %impl.elem0, %.loc10_42.2
// CHECK:STDOUT: requirement_rewrite %impl.elem1, %.loc10_53
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: %M.loc10_25.2: %J_where.type = symbolic_binding M, 0 [symbolic = %M.loc10_25.1 (constants.%M)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %Reversed.decl: %Reversed.type = fn_decl @Reversed [concrete = constants.%Reversed] {
// CHECK:STDOUT: %N.patt: %pattern_type.a2c = symbolic_binding_pattern N, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc12_19.1: type = splice_block %.loc12_19.2 [concrete = constants.%J_where.type] {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %J.ref: type = name_ref J, file.%J.decl [concrete = constants.%J.type]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %.Self.ref.loc12_25: %J.type = name_ref .Self, %.Self.2 [symbolic_self = constants.%.Self.2fa]
// CHECK:STDOUT: %.Self.as_type.loc12_25: type = facet_access_type %.Self.ref.loc12_25 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %.loc12_25: type = converted %.Self.ref.loc12_25, %.Self.as_type.loc12_25 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %L.ref: %J.assoc_type = name_ref L, @L.%assoc1 [concrete = constants.%assoc1]
// CHECK:STDOUT: %impl.elem1: type = impl_witness_access constants.%J.lookup_impl_witness, element1 [symbolic_self = constants.%impl.elem1]
// CHECK:STDOUT: %.loc12_30: type = type_literal bool [concrete = bool]
// CHECK:STDOUT: %.Self.ref.loc12_39: %J.type = name_ref .Self, %.Self.2 [symbolic_self = constants.%.Self.2fa]
// CHECK:STDOUT: %.Self.as_type.loc12_39: type = facet_access_type %.Self.ref.loc12_39 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %.loc12_39: type = converted %.Self.ref.loc12_39, %.Self.as_type.loc12_39 [symbolic_self = constants.%.Self.as_type]
// CHECK:STDOUT: %K.ref: %J.assoc_type = name_ref K, @K.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT: %impl.elem0: type = impl_witness_access constants.%J.lookup_impl_witness, element0 [symbolic_self = constants.%impl.elem0]
// CHECK:STDOUT: %.loc12_45.1: %empty_tuple.type = tuple_literal () [concrete = constants.%empty_tuple]
// CHECK:STDOUT: %.loc12_45.2: type = converted %.loc12_45.1, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT: %.loc12_19.2: type = where_expr [concrete = constants.%J_where.type] {
// CHECK:STDOUT: requirement_base_facet_type %J.ref
// CHECK:STDOUT: requirement_rewrite %impl.elem1, %.loc12_30
// CHECK:STDOUT: requirement_rewrite %impl.elem0, %.loc12_45.2
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: %N.loc12_14.2: %J_where.type = symbolic_binding N, 0 [symbolic = %N.loc12_14.1 (constants.%N)]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @Alphabetical(%M.loc10_25.2: %J_where.type) {
// CHECK:STDOUT: %M.loc10_25.1: %J_where.type = symbolic_binding M, 0 [symbolic = %M.loc10_25.1 (constants.%M)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @Reversed(%N.loc12_14.2: %J_where.type) {
// CHECK:STDOUT: %N.loc12_14.1: %J_where.type = symbolic_binding N, 0 [symbolic = %N.loc12_14.1 (constants.%N)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: <elided>
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Alphabetical(constants.%M) {
// CHECK:STDOUT: %M.loc10_25.1 => constants.%M
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Reversed(constants.%N) {
// CHECK:STDOUT: %N.loc12_14.1 => constants.%N
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Alphabetical(constants.%N) {
// CHECK:STDOUT: %M.loc10_25.1 => constants.%N
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: }
// CHECK:STDOUT:
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