mirror of
https://github.com/carbon-language/carbon-lang.git
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Dana Jansens
b22ee48c9b
This disallows building a facet type that contains another facet type with non-extend constraints in it. Which in turn prevents the possibility of introducing a different `.Self` into a facet type. Eval can still insert a facet type with non-extend constraints, as we only prevent it for `where` being written into the facet type. There is a TODO in handle_where.cpp for this and some tests in toolchain/check/testdata/facet/nested_facet_types_from_eval.carbon
85 lines
3.4 KiB
Plaintext
85 lines
3.4 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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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/none.carbon
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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/impl/impl_where_redecl.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/impl/impl_where_redecl.carbon
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// `impl` declarations only match when they are the same syntactically.
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// --- fail_match_with_associated_type.carbon
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library "[[@TEST_NAME]]";
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interface I { let T:! type; }
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constraint N(U:! type) {}
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// CHECK:STDERR: fail_match_with_associated_type.carbon:[[@LINE+4]]:1: error: impl declared but not defined [ImplMissingDefinition]
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// CHECK:STDERR: impl () as I where .T = {};
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl () as I where .T = {};
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impl () as I where .T = {} and .T impls N(.Self) {}
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// CHECK:STDERR: fail_match_with_associated_type.carbon:[[@LINE+4]]:1: error: impl declared but not defined [ImplMissingDefinition]
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// CHECK:STDERR: impl {} as I;
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// CHECK:STDERR: ^~~~~~~~~~~~~
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// CHECK:STDERR:
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impl {} as I;
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impl {} as I where .T = {} and .T impls N(.Self) {}
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// CHECK:STDERR: fail_match_with_associated_type.carbon:[[@LINE+4]]:1: error: impl declared but not defined [ImplMissingDefinition]
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// CHECK:STDERR: impl ({},) as I where .T = {} and .T impls N(.Self);
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl ({},) as I where .T = {} and .T impls N(.Self);
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impl ({},) as I where .T = {} {}
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// --- fail_match_with_empty_interface.carbon
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library "[[@TEST_NAME]]";
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interface J {}
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constraint N {}
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// CHECK:STDERR: fail_match_with_empty_interface.carbon:[[@LINE+4]]:1: error: impl declared but not defined [ImplMissingDefinition]
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// CHECK:STDERR: impl () as J;
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// CHECK:STDERR: ^~~~~~~~~~~~~
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// CHECK:STDERR:
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impl () as J;
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impl () as J where .Self impls type and .Self impls N {}
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// CHECK:STDERR: fail_match_with_empty_interface.carbon:[[@LINE+4]]:1: error: impl declared but not defined [ImplMissingDefinition]
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// CHECK:STDERR: impl {} as J where .Self impls type and .Self impls N;
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl {} as J where .Self impls type and .Self impls N;
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impl {} as J {}
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// --- fail_parens_other_nesting.carbon
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library "[[@TEST_NAME]]";
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interface K {}
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// CHECK:STDERR: fail_parens_other_nesting.carbon:[[@LINE+4]]:1: error: impl declared but not defined [ImplMissingDefinition]
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// CHECK:STDERR: impl {} as (K where .Self impls type) where .Self impls type;
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl {} as (K where .Self impls type) where .Self impls type;
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impl {} as (K where .Self impls type) {}
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// --- fail_other_nesting.carbon
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library "[[@TEST_NAME]]";
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interface L {}
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// CHECK:STDERR: fail_other_nesting.carbon:[[@LINE+4]]:1: error: impl declared but not defined [ImplMissingDefinition]
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// CHECK:STDERR: impl () as (L where .Self impls type) where .Self impls type;
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl () as (L where .Self impls type) where .Self impls type;
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impl () as L {}
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