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33110d096cb0c089995dfbf5c1986d4d5c178dad
carbon-lang/toolchain/check/testdata/where_expr/fail_not_facet.carbon
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josh11bJosh LRichard Smith
 33110d096c Facet types support rewrite (where .A =...) constraints (#4613) 
* Rewrite constraints are stored in a facet type, substituted, imported,
and formatted.
* We now distinguish `.Self` from other symbolic bindings in two ways:
* `.Self` itself now has an invalid compile time binding index (since it
doesn't bind to any of the generic parameters). As a result, we no
longer need to create a generic region in `handle_where.cpp`.
* There is a new phase tracking values that are only symbolic because
they transitively depend on `.Self`. This allows us to give the result
of a `where` expression template phase as long as it doesn't use any
symbolic constants other than `.Self` or other designators.
* `AddConstant` has been removed from `check/context` since it was only
used from `eval`. This meant less plumbing of the phase change.
* Evaluation of `BindSymbolicName` now also performs substitution into
its type.
* Include a bit more information in some diagnostics.
* `StringifyTypeExpr` outputs rewrites, which required adding support
for associated entities as well.
  * Associated entities now have an entity name set when importing.
* Adds tests for some interesting cases with rewrites and uses of
`.Self` mixed with other symbolic constants.

Still to do:
* There is no validation that any particular type satisfies rewrite
constraints.
  * Access to members of a facet type do not see the rewritten values.
* Impls don't recognize whether associated constants have rewrites
setting their values.
  * No support for resolving facet types.

---------

Co-authored-by: Josh L <josh11b@users.noreply.github.com>
Co-authored-by: Richard Smith <richard@metafoo.co.uk>
2024-12-03 22:44:39 +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
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/where_expr/fail_not_facet.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/where_expr/fail_not_facet.carbon
// --- fail_left_where_not_facet.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_left_where_not_facet.carbon:[[@LINE+4]]:10: error: left argument of `where` operator must be a facet type [WhereOnNonFacetType]
// CHECK:STDERR: fn F(T:! i32 where .Self == bool);
// CHECK:STDERR: ^~~
// CHECK:STDERR:
fn F(T:! i32 where .Self == bool);
// --- fail_left_where_unknown.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_left_where_unknown.carbon:[[@LINE+4]]:10: error: name `NOT_DECLARED` not found [NameNotFound]
// CHECK:STDERR: fn G(U:! NOT_DECLARED where .Self == bool);
// CHECK:STDERR: ^~~~~~~~~~~~
// CHECK:STDERR:
fn G(U:! NOT_DECLARED where .Self == bool);
// --- fail_var.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_var.carbon:[[@LINE+3]]:8: error: name `e` not found [NameNotFound]
// CHECK:STDERR: var v: e where .x = 3;
// CHECK:STDERR: ^
var v: e where .x = 3;
// CHECK:STDOUT: --- fail_left_where_not_facet.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [template]
// CHECK:STDOUT: %Int.type: type = fn_type @Int [template]
// CHECK:STDOUT: %Int: %Int.type = struct_value () [template]
// CHECK:STDOUT: %i32: type = int_type signed, %int_32 [template]
// CHECK:STDOUT: %Bool.type: type = fn_type @Bool [template]
// CHECK:STDOUT: %Bool: %Bool.type = struct_value () [template]
// CHECK:STDOUT: %T.patt: <error> = symbolic_binding_pattern T, 0 [symbolic]
// CHECK:STDOUT: %F.type: type = fn_type @F [template]
// CHECK:STDOUT: %F: %F.type = struct_value () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT: .Int = %import_ref.1
// CHECK:STDOUT: .Bool = %import_ref.2
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [template] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .F = %F.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [template = constants.%F] {
// CHECK:STDOUT: %T.patt.loc8_6.1: <error> = symbolic_binding_pattern T, 0 [symbolic = %T.patt.loc8_6.2 (constants.%T.patt)]
// CHECK:STDOUT: %T.param_patt: <error> = value_param_pattern %T.patt.loc8_6.1, runtime_param<invalid> [symbolic = %T.patt.loc8_6.2 (constants.%T.patt)]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [template = constants.%int_32]
// CHECK:STDOUT: %int.make_type_signed: init type = call constants.%Int(%int_32) [template = constants.%i32]
// CHECK:STDOUT: %.loc8_10.1: type = value_of_initializer %int.make_type_signed [template = constants.%i32]
// CHECK:STDOUT: %.loc8_10.2: type = converted %int.make_type_signed, %.loc8_10.1 [template = constants.%i32]
// CHECK:STDOUT: %.Self: <error> = bind_symbolic_name .Self [template = <error>]
// CHECK:STDOUT: %.Self.ref: <error> = name_ref .Self, %.Self [template = <error>]
// CHECK:STDOUT: %bool.make_type: init type = call constants.%Bool() [template = bool]
// CHECK:STDOUT: %.loc8_14: type = where_expr %.Self [template = <error>] {
// CHECK:STDOUT: requirement_equivalent %.Self.ref, %bool.make_type
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.param: <error> = value_param runtime_param<invalid>
// CHECK:STDOUT: %T: <error> = bind_symbolic_name T, 0, %T.param [template = <error>]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @F(%T: <error>) {
// CHECK:STDOUT: %T.patt.loc8_6.2: <error> = symbolic_binding_pattern T, 0 [symbolic = %T.patt.loc8_6.2 (constants.%T.patt)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn(%T.param_patt: <error>);
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F(<error>) {
// CHECK:STDOUT: %T.patt.loc8_6.2 => <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_left_where_unknown.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Bool.type: type = fn_type @Bool [template]
// CHECK:STDOUT: %Bool: %Bool.type = struct_value () [template]
// CHECK:STDOUT: %U.patt: <error> = symbolic_binding_pattern U, 0 [symbolic]
// CHECK:STDOUT: %G.type: type = fn_type @G [template]
// CHECK:STDOUT: %G: %G.type = struct_value () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT: .Bool = %import_ref
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [template] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .G = %G.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [template = constants.%G] {
// CHECK:STDOUT: %U.patt.loc8_6.1: <error> = symbolic_binding_pattern U, 0 [symbolic = %U.patt.loc8_6.2 (constants.%U.patt)]
// CHECK:STDOUT: %U.param_patt: <error> = value_param_pattern %U.patt.loc8_6.1, runtime_param<invalid> [symbolic = %U.patt.loc8_6.2 (constants.%U.patt)]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %NOT_DECLARED.ref: <error> = name_ref NOT_DECLARED, <error> [template = <error>]
// CHECK:STDOUT: %.Self: <error> = bind_symbolic_name .Self [template = <error>]
// CHECK:STDOUT: %.Self.ref: <error> = name_ref .Self, %.Self [template = <error>]
// CHECK:STDOUT: %bool.make_type: init type = call constants.%Bool() [template = bool]
// CHECK:STDOUT: %.loc8: type = where_expr %.Self [template = <error>] {
// CHECK:STDOUT: requirement_equivalent %.Self.ref, %bool.make_type
// CHECK:STDOUT: }
// CHECK:STDOUT: %U.param: <error> = value_param runtime_param<invalid>
// CHECK:STDOUT: %U: <error> = bind_symbolic_name U, 0, %U.param [template = <error>]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @G(%U: <error>) {
// CHECK:STDOUT: %U.patt.loc8_6.2: <error> = symbolic_binding_pattern U, 0 [symbolic = %U.patt.loc8_6.2 (constants.%U.patt)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn(%U.param_patt: <error>);
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @G(<error>) {
// CHECK:STDOUT: %U.patt.loc8_6.2 => <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_var.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %int_3: Core.IntLiteral = int_value 3 [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [template] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .v = %v
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %e.ref: <error> = name_ref e, <error> [template = <error>]
// CHECK:STDOUT: %.Self: <error> = bind_symbolic_name .Self [template = <error>]
// CHECK:STDOUT: %.Self.ref: <error> = name_ref .Self, %.Self [template = <error>]
// CHECK:STDOUT: %x.ref: <error> = name_ref x, <error> [template = <error>]
// CHECK:STDOUT: %int_3: Core.IntLiteral = int_value 3 [template = constants.%int_3]
// CHECK:STDOUT: %.loc7: type = where_expr %.Self [template = <error>] {
// CHECK:STDOUT: requirement_rewrite %x.ref, <error>
// CHECK:STDOUT: }
// CHECK:STDOUT: %v.var: ref <error> = var v
// CHECK:STDOUT: %v: ref <error> = bind_name v, %v.var
// CHECK:STDOUT: }
// CHECK:STDOUT:
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