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carbon-lang/toolchain/check/testdata/interface/fail_modifiers.carbon
T
Geoff RomerandRichard Smith e023f75254 Implement thunking in terms of constant evaluation (#7332) 
The bulk of this change is changing most pattern insts to be `Always`
rather than `AlwaysUnique` constants, so that they can be wrapped in
`SpecificConstant`s to perform substitution. That then lets thunking
rely much more on `SpecificConstant` wrappers instead of deep-copying
the inst tree with modified types.

This approach to thunking should scale better, particularly as things
like form generics make function signatures more complex, because we can
leverage the existing support for constant evaluation and substitution.
Unfortunately, applying this approach to binding patterns will require
more work; see the TODO near the top of `thunk.cpp` for details.

---------

Co-authored-by: Richard Smith <richard@metafoo.co.uk>
2026-06-13 00:22:00 +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/none.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/interface/fail_modifiers.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interface/fail_modifiers.carbon
// --- fail_abstract.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_abstract.carbon:[[@LINE+4]]:1: error: `abstract` not allowed on `interface` declaration [ModifierNotAllowedOnDeclaration]
// CHECK:STDERR: abstract interface Abstract {
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR:
abstract interface Abstract {
}
// --- fail_default.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_default.carbon:[[@LINE+4]]:1: error: `default` not allowed on `interface` declaration [ModifierNotAllowedOnDeclaration]
// CHECK:STDERR: default interface Default;
// CHECK:STDERR: ^~~~~~~
// CHECK:STDERR:
default interface Default;
// --- fail_virtual.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_virtual.carbon:[[@LINE+4]]:1: error: `virtual` not allowed on `interface` declaration [ModifierNotAllowedOnDeclaration]
// CHECK:STDERR: virtual interface Virtual {
// CHECK:STDERR: ^~~~~~~
// CHECK:STDERR:
virtual interface Virtual {
}
// --- fail_protected.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_protected.carbon:[[@LINE+4]]:1: error: `protected` not allowed; requires class scope [ModifierProtectedNotAllowed]
// CHECK:STDERR: protected interface Protected;
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR:
protected interface Protected;
// --- fail_private_member.carbon
library "[[@TEST_NAME]]";
interface I {
// CHECK:STDERR: fail_private_member.carbon:[[@LINE+4]]:3: error: `private` not allowed; requires class or file scope [ModifierPrivateNotAllowed]
// CHECK:STDERR: private fn F(self);
// CHECK:STDERR: ^~~~~~~
// CHECK:STDERR:
private fn F(self);
}
// --- fail_protected_member.carbon
library "[[@TEST_NAME]]";
interface I {
// CHECK:STDERR: fail_protected_member.carbon:[[@LINE+4]]:3: error: `protected` not allowed; requires class scope [ModifierProtectedNotAllowed]
// CHECK:STDERR: protected fn F(self);
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR:
protected fn F(self);
}
// CHECK:STDOUT: --- fail_abstract.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Abstract.type: type = facet_type <@Abstract> [concrete]
// CHECK:STDOUT: %Self: %Abstract.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Abstract = %Abstract.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Abstract.decl: type = interface_decl @Abstract [concrete = constants.%Abstract.type] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @Abstract {
// CHECK:STDOUT: %Self: %Abstract.type = symbolic_binding Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT: %Abstract.WithSelf.decl = interface_with_self_decl @Abstract [concrete]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Abstract.WithSelf(constants.%Self) {}
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_default.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Default.type: type = facet_type <@Default> [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Default = %Default.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Default.decl: type = interface_decl @Default [concrete = constants.%Default.type] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @Default;
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_virtual.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Virtual.type: type = facet_type <@Virtual> [concrete]
// CHECK:STDOUT: %Self: %Virtual.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Virtual = %Virtual.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Virtual.decl: type = interface_decl @Virtual [concrete = constants.%Virtual.type] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @Virtual {
// CHECK:STDOUT: %Self: %Virtual.type = symbolic_binding Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT: %Virtual.WithSelf.decl = interface_with_self_decl @Virtual [concrete]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Virtual.WithSelf(constants.%Self) {}
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_protected.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Protected.type: type = facet_type <@Protected> [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Protected = %Protected.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Protected.decl: type = interface_decl @Protected [concrete = constants.%Protected.type] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @Protected;
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_private_member.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %I.type: type = facet_type <@I> [concrete]
// CHECK:STDOUT: %Self: %I.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %Self.as_type: type = facet_access_type %Self [symbolic]
// CHECK:STDOUT: %pattern_type: type = pattern_type %Self.as_type [symbolic]
// CHECK:STDOUT: %self.param_patt: %pattern_type = value_param_pattern [symbolic]
// CHECK:STDOUT: %self.patt: %pattern_type = at_binding_pattern self, %self.param_patt [symbolic]
// CHECK:STDOUT: %I.WithSelf.F.type: type = fn_type @I.WithSelf.F, @I.WithSelf(%Self) [symbolic]
// CHECK:STDOUT: %I.WithSelf.F: %I.WithSelf.F.type = struct_value () [symbolic]
// CHECK:STDOUT: %I.assoc_type: type = assoc_entity_type @I [concrete]
// CHECK:STDOUT: %assoc0: %I.assoc_type = assoc_entity element0, @I.WithSelf.%I.WithSelf.F.decl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .I = %I.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %I.decl: type = interface_decl @I [concrete = constants.%I.type] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I {
// CHECK:STDOUT: %Self: %I.type = symbolic_binding Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT: %I.WithSelf.decl = interface_with_self_decl @I [concrete]
// CHECK:STDOUT:
// CHECK:STDOUT: !with Self:
// CHECK:STDOUT: %I.WithSelf.F.decl: @I.WithSelf.%I.WithSelf.F.type (%I.WithSelf.F.type) = fn_decl @I.WithSelf.F [symbolic = @I.WithSelf.%I.WithSelf.F (constants.%I.WithSelf.F)] {
// CHECK:STDOUT: %self.param_patt.loc9_16.1: @I.WithSelf.F.%pattern_type (%pattern_type) = value_param_pattern [symbolic = %self.param_patt.loc9_16.2 (constants.%self.param_patt)]
// CHECK:STDOUT: %self.patt.loc9_16.1: @I.WithSelf.F.%pattern_type (%pattern_type) = at_binding_pattern self, %self.param_patt.loc9_16.1 [symbolic = %self.patt.loc9_16.2 (constants.%self.patt)]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %self.param: @I.WithSelf.F.%Self.as_type.loc9_16.1 (%Self.as_type) = value_param call_param0
// CHECK:STDOUT: %.loc9_16.1: type = splice_block %.loc9_16.2 [symbolic = %Self.as_type.loc9_16.1 (constants.%Self.as_type)] {
// CHECK:STDOUT: %Self.ref: %I.type = name_ref Self, @I.%Self [symbolic = %Self (constants.%Self)]
// CHECK:STDOUT: %Self.as_type.loc9_16.2: type = facet_access_type %Self.ref [symbolic = %Self.as_type.loc9_16.1 (constants.%Self.as_type)]
// CHECK:STDOUT: %.loc9_16.2: type = converted %Self.ref, %Self.as_type.loc9_16.2 [symbolic = %Self.as_type.loc9_16.1 (constants.%Self.as_type)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %self: @I.WithSelf.F.%Self.as_type.loc9_16.1 (%Self.as_type) = value_binding self, %self.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %assoc0: %I.assoc_type = assoc_entity element0, %I.WithSelf.F.decl [concrete = constants.%assoc0]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .F = @I.WithSelf.%assoc0
// CHECK:STDOUT: witness = (@I.WithSelf.%I.WithSelf.F.decl)
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @I.WithSelf.F(@I.%Self: %I.type) {
// CHECK:STDOUT: %Self: %I.type = symbolic_binding Self, 0 [symbolic = %Self (constants.%Self)]
// CHECK:STDOUT: %Self.as_type.loc9_16.1: type = facet_access_type %Self [symbolic = %Self.as_type.loc9_16.1 (constants.%Self.as_type)]
// CHECK:STDOUT: %pattern_type: type = pattern_type %Self.as_type.loc9_16.1 [symbolic = %pattern_type (constants.%pattern_type)]
// CHECK:STDOUT: %self.param_patt.loc9_16.2: @I.WithSelf.F.%pattern_type (%pattern_type) = value_param_pattern [symbolic = %self.param_patt.loc9_16.2 (constants.%self.param_patt)]
// CHECK:STDOUT: %self.patt.loc9_16.2: @I.WithSelf.F.%pattern_type (%pattern_type) = at_binding_pattern self, %self.param_patt.loc9_16.2 [symbolic = %self.patt.loc9_16.2 (constants.%self.patt)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn(%self.param: @I.WithSelf.F.%Self.as_type.loc9_16.1 (%Self.as_type));
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.WithSelf(constants.%Self) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.WithSelf.F(constants.%Self) {
// CHECK:STDOUT: %Self => constants.%Self
// CHECK:STDOUT: %Self.as_type.loc9_16.1 => constants.%Self.as_type
// CHECK:STDOUT: %pattern_type => constants.%pattern_type
// CHECK:STDOUT: %self.param_patt.loc9_16.2 => constants.%self.param_patt
// CHECK:STDOUT: %self.patt.loc9_16.2 => constants.%self.patt
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_protected_member.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %I.type: type = facet_type <@I> [concrete]
// CHECK:STDOUT: %Self: %I.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %Self.as_type: type = facet_access_type %Self [symbolic]
// CHECK:STDOUT: %pattern_type: type = pattern_type %Self.as_type [symbolic]
// CHECK:STDOUT: %self.param_patt: %pattern_type = value_param_pattern [symbolic]
// CHECK:STDOUT: %self.patt: %pattern_type = at_binding_pattern self, %self.param_patt [symbolic]
// CHECK:STDOUT: %I.WithSelf.F.type: type = fn_type @I.WithSelf.F, @I.WithSelf(%Self) [symbolic]
// CHECK:STDOUT: %I.WithSelf.F: %I.WithSelf.F.type = struct_value () [symbolic]
// CHECK:STDOUT: %I.assoc_type: type = assoc_entity_type @I [concrete]
// CHECK:STDOUT: %assoc0: %I.assoc_type = assoc_entity element0, @I.WithSelf.%I.WithSelf.F.decl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .I = %I.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %I.decl: type = interface_decl @I [concrete = constants.%I.type] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I {
// CHECK:STDOUT: %Self: %I.type = symbolic_binding Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT: %I.WithSelf.decl = interface_with_self_decl @I [concrete]
// CHECK:STDOUT:
// CHECK:STDOUT: !with Self:
// CHECK:STDOUT: %I.WithSelf.F.decl: @I.WithSelf.%I.WithSelf.F.type (%I.WithSelf.F.type) = fn_decl @I.WithSelf.F [symbolic = @I.WithSelf.%I.WithSelf.F (constants.%I.WithSelf.F)] {
// CHECK:STDOUT: %self.param_patt.loc9_18.1: @I.WithSelf.F.%pattern_type (%pattern_type) = value_param_pattern [symbolic = %self.param_patt.loc9_18.2 (constants.%self.param_patt)]
// CHECK:STDOUT: %self.patt.loc9_18.1: @I.WithSelf.F.%pattern_type (%pattern_type) = at_binding_pattern self, %self.param_patt.loc9_18.1 [symbolic = %self.patt.loc9_18.2 (constants.%self.patt)]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %self.param: @I.WithSelf.F.%Self.as_type.loc9_18.1 (%Self.as_type) = value_param call_param0
// CHECK:STDOUT: %.loc9_18.1: type = splice_block %.loc9_18.2 [symbolic = %Self.as_type.loc9_18.1 (constants.%Self.as_type)] {
// CHECK:STDOUT: %Self.ref: %I.type = name_ref Self, @I.%Self [symbolic = %Self (constants.%Self)]
// CHECK:STDOUT: %Self.as_type.loc9_18.2: type = facet_access_type %Self.ref [symbolic = %Self.as_type.loc9_18.1 (constants.%Self.as_type)]
// CHECK:STDOUT: %.loc9_18.2: type = converted %Self.ref, %Self.as_type.loc9_18.2 [symbolic = %Self.as_type.loc9_18.1 (constants.%Self.as_type)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %self: @I.WithSelf.F.%Self.as_type.loc9_18.1 (%Self.as_type) = value_binding self, %self.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %assoc0: %I.assoc_type = assoc_entity element0, %I.WithSelf.F.decl [concrete = constants.%assoc0]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .F = @I.WithSelf.%assoc0
// CHECK:STDOUT: witness = (@I.WithSelf.%I.WithSelf.F.decl)
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @I.WithSelf.F(@I.%Self: %I.type) {
// CHECK:STDOUT: %Self: %I.type = symbolic_binding Self, 0 [symbolic = %Self (constants.%Self)]
// CHECK:STDOUT: %Self.as_type.loc9_18.1: type = facet_access_type %Self [symbolic = %Self.as_type.loc9_18.1 (constants.%Self.as_type)]
// CHECK:STDOUT: %pattern_type: type = pattern_type %Self.as_type.loc9_18.1 [symbolic = %pattern_type (constants.%pattern_type)]
// CHECK:STDOUT: %self.param_patt.loc9_18.2: @I.WithSelf.F.%pattern_type (%pattern_type) = value_param_pattern [symbolic = %self.param_patt.loc9_18.2 (constants.%self.param_patt)]
// CHECK:STDOUT: %self.patt.loc9_18.2: @I.WithSelf.F.%pattern_type (%pattern_type) = at_binding_pattern self, %self.param_patt.loc9_18.2 [symbolic = %self.patt.loc9_18.2 (constants.%self.patt)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn(%self.param: @I.WithSelf.F.%Self.as_type.loc9_18.1 (%Self.as_type));
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.WithSelf(constants.%Self) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @I.WithSelf.F(constants.%Self) {
// CHECK:STDOUT: %Self => constants.%Self
// CHECK:STDOUT: %Self.as_type.loc9_18.1 => constants.%Self.as_type
// CHECK:STDOUT: %pattern_type => constants.%pattern_type
// CHECK:STDOUT: %self.param_patt.loc9_18.2 => constants.%self.param_patt
// CHECK:STDOUT: %self.patt.loc9_18.2 => constants.%self.patt
// CHECK:STDOUT: }
// CHECK:STDOUT:
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