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33110d096c
* 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>
74 lines
3.5 KiB
Plaintext
74 lines
3.5 KiB
Plaintext
// 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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// 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/fail_self_param.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/fail_self_param.carbon
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// CHECK:STDERR: fail_self_param.carbon:[[@LINE+3]]:9: error: `self` parameter only allowed on functions [SelfParameterNotAllowed]
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// CHECK:STDERR: class C[self:! type](x:! self) {}
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// CHECK:STDERR: ^~~~~~~~~~~
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class C[self:! type](x:! self) {}
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var v: C(0);
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// CHECK:STDOUT: --- fail_self_param.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %x.patt: <error> = symbolic_binding_pattern x, 0 [symbolic]
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// CHECK:STDOUT: %C.type: type = generic_class_type @C [template]
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// CHECK:STDOUT: %C.generic: %C.type = struct_value () [template]
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// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [template]
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// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [template]
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// CHECK:STDOUT: %int_0: Core.IntLiteral = int_value 0 [template]
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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, [template] {
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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: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: file {
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// CHECK:STDOUT: package: <namespace> = namespace [template] {
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// CHECK:STDOUT: .Core = imports.%Core
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// CHECK:STDOUT: .C = %C.decl
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// CHECK:STDOUT: .v = %v
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Core.import = import Core
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// CHECK:STDOUT: %C.decl: %C.type = class_decl @C [template = constants.%C.generic] {
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// CHECK:STDOUT: %x.patt.loc14_22.1: <error> = symbolic_binding_pattern x, 0 [symbolic = %x.patt.loc14_22.2 (constants.%x.patt)]
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// CHECK:STDOUT: %x.param_patt: <error> = value_param_pattern %x.patt.loc14_22.1, runtime_param<invalid> [symbolic = %x.patt.loc14_22.2 (constants.%x.patt)]
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// CHECK:STDOUT: } {
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// CHECK:STDOUT: %self.ref: <error> = name_ref self, <error> [template = <error>]
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// CHECK:STDOUT: %x.param: <error> = value_param runtime_param<invalid>
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// CHECK:STDOUT: %x: <error> = bind_symbolic_name x, 0, %x.param [template = <error>]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %C.ref: %C.type = name_ref C, %C.decl [template = constants.%C.generic]
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// CHECK:STDOUT: %int_0: Core.IntLiteral = int_value 0 [template = constants.%int_0]
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// CHECK:STDOUT: %v.var: ref <error> = var v
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// CHECK:STDOUT: %v: ref <error> = bind_name v, %v.var
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: generic class @C(%x: <error>) {
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// CHECK:STDOUT: %x.patt.loc14_22.2: <error> = symbolic_binding_pattern x, 0 [symbolic = %x.patt.loc14_22.2 (constants.%x.patt)]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !definition:
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// CHECK:STDOUT:
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// CHECK:STDOUT: class {
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// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [template = constants.%complete_type]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: .Self = <error>
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// CHECK:STDOUT: complete_type_witness = %complete_type
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: specific @C(<error>) {
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// CHECK:STDOUT: %x.patt.loc14_22.2 => <error>
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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