mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-04 14:11:05 +01:00
Geoff RomerandRichard Smith
e023f75254
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>
346 lines
9.1 KiB
Plaintext
346 lines
9.1 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/convert.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_as_named_constraint.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_as_named_constraint.carbon
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// --- fail_empty_constraint.carbon
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library "[[@TEST_NAME]]";
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constraint A {}
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// CHECK:STDERR: fail_empty_constraint.carbon:[[@LINE+4]]:1: error: impl as 0 interfaces, expected 1 [ImplOfNotOneInterface]
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// CHECK:STDERR: impl () as A {}
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// CHECK:STDERR: ^~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl () as A {}
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// --- fail_too_many_interfaces_in_constraint.carbon
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library "[[@TEST_NAME]]";
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interface A1 {}
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interface A2 {}
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constraint B {
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extend require impls A1;
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extend require impls A2;
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}
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// CHECK:STDERR: fail_too_many_interfaces_in_constraint.carbon:[[@LINE+4]]:1: error: impl as 2 interfaces, expected 1 [ImplOfNotOneInterface]
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// CHECK:STDERR: impl () as B {}
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// CHECK:STDERR: ^~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl () as B {}
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// --- one_extend_impls_interface_in_constraint.carbon
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library "[[@TEST_NAME]]";
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interface A {}
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constraint B {
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extend require impls A;
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}
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impl () as B {}
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// --- fail_one_impls_interface_in_constraint.carbon
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library "[[@TEST_NAME]]";
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interface A;
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constraint B {
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require impls A;
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}
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// CHECK:STDERR: fail_one_impls_interface_in_constraint.carbon:[[@LINE+4]]:1: error: impl as 0 interfaces, expected 1 [ImplOfNotOneInterface]
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// CHECK:STDERR: impl () as B {}
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// CHECK:STDERR: ^~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl () as B {}
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// --- nested_constraints.carbon
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library "[[@TEST_NAME]]";
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interface A {}
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constraint B {
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extend require impls A;
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}
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constraint C {
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extend require impls B;
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}
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impl () as C {}
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// --- fail_nested_constraints_not_extend_outer.carbon
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library "[[@TEST_NAME]]";
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interface A {}
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constraint B {
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extend require impls A;
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}
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constraint C {
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require impls B;
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}
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// CHECK:STDERR: fail_nested_constraints_not_extend_outer.carbon:[[@LINE+4]]:1: error: impl as 0 interfaces, expected 1 [ImplOfNotOneInterface]
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// CHECK:STDERR: impl () as C {}
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// CHECK:STDERR: ^~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl () as C {}
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// --- fail_nested_constraints_not_extend_inner.carbon
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library "[[@TEST_NAME]]";
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interface A {}
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constraint B {
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require impls A;
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}
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constraint C {
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extend require impls B;
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}
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// CHECK:STDERR: fail_nested_constraints_not_extend_inner.carbon:[[@LINE+4]]:1: error: impl as 0 interfaces, expected 1 [ImplOfNotOneInterface]
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// CHECK:STDERR: impl () as C {}
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// CHECK:STDERR: ^~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl () as C {}
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// --- fail_nested_constraints_not_extend_both.carbon
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library "[[@TEST_NAME]]";
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interface A {}
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constraint B {
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require impls A;
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}
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constraint C {
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require impls B;
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}
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// CHECK:STDERR: fail_nested_constraints_not_extend_both.carbon:[[@LINE+4]]:1: error: impl as 0 interfaces, expected 1 [ImplOfNotOneInterface]
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// CHECK:STDERR: impl () as C {}
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// CHECK:STDERR: ^~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl () as C {}
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// --- fail_duplicate_through_generic_constraint.carbon
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library "[[@TEST_NAME]]";
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interface A(T:! type) {}
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constraint B(X:! type, Y:! type) {
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extend require impls A(Y);
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}
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// This should impl () as A({}).
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impl () as B((), {}) {}
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// CHECK:STDERR: fail_duplicate_through_generic_constraint.carbon:[[@LINE+7]]:1: error: found non-final `impl` with the same type structure as another non-final `impl` [ImplNonFinalSameTypeStructure]
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// CHECK:STDERR: impl () as A({}) {}
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~
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// CHECK:STDERR: fail_duplicate_through_generic_constraint.carbon:[[@LINE-5]]:1: note: other `impl` here [ImplNonFinalSameTypeStructureNote]
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// CHECK:STDERR: impl () as B((), {}) {}
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl () as A({}) {}
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// --- fail_error_self_in_require.carbon
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library "[[@TEST_NAME]]";
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interface A(T:! type) {}
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// This makes the type of `Self` into an ErrorInst. No `require` is added to
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// the constraint.
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//@dump-sem-ir-begin
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//
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// CHECK:STDERR: fail_error_self_in_require.carbon:[[@LINE+4]]:18: error: name `Undefined` not found [NameNotFound]
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// CHECK:STDERR: constraint B(X:! Undefined) {
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// CHECK:STDERR: ^~~~~~~~~
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// CHECK:STDERR:
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constraint B(X:! Undefined) {
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extend require impls A(X);
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}
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//@dump-sem-ir-end
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impl () as B(1) {}
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// --- impl_as_constraint_where_rewrite.carbon
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library "[[@TEST_NAME]]";
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interface I {
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let I1:! type;
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}
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constraint N {
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extend require impls I;
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}
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class C;
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impl C as N where .I1 = C {}
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fn F(_:! I where .I1 = .Self) {}
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fn G() {
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// TODO: This crashes.
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// F(C);
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}
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// --- impl_as_concrete_generic_constraint_where_rewrite.carbon
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library "[[@TEST_NAME]]";
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interface I(T:! type) {
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let I1:! type;
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}
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class C;
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constraint N {
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extend require impls I(C);
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}
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impl C as N where .I1 = C {}
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fn F(_:! I(.Self) where .I1 = .Self) {}
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fn G() {
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// TODO: This crashes.
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// F(C);
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}
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// --- todo_impl_as_symbolic_generic_constraint_where_rewrite.carbon
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library "[[@TEST_NAME]]";
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interface I(T:! type) {
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let I1:! type;
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}
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constraint N {
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extend require impls I(Self);
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}
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class C;
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impl C as N where .I1 = C {}
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fn F(_:! I(.Self) where .I1 = .Self) {}
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fn G() {
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// TODO: This crashes.
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// F(C);
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}
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// --- fail_todo_impl_as_constraint_containing_rewrite_for_concrete_interface.carbon
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library "[[@TEST_NAME]]";
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interface I {
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let I1:! type;
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}
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constraint N {
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extend require impls I where .I1 = Self;
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}
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class C;
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// CHECK:STDERR: fail_todo_impl_as_constraint_containing_rewrite_for_concrete_interface.carbon:[[@LINE+7]]:1: error: associated constant I1 not given a value in impl of interface I [ImplAssociatedConstantNeedsValue]
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// CHECK:STDERR: impl C as N {}
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// CHECK:STDERR: ^~~~~~~~~~~~~
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// CHECK:STDERR: fail_todo_impl_as_constraint_containing_rewrite_for_concrete_interface.carbon:[[@LINE-11]]:7: note: associated constant declared here [AssociatedConstantHere]
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// CHECK:STDERR: let I1:! type;
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// CHECK:STDERR: ^~~~~~~~~
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// CHECK:STDERR:
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impl C as N {}
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fn F(_:! I where .I1 = .Self) {}
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fn G() {
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// TODO: This crashes.
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// F(C);
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}
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// --- fail_todo_impl_as_constraint_containing_rewrite_for_generic_interface.carbon
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library "[[@TEST_NAME]]";
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interface I(T:! type) {
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let I1:! type;
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}
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constraint N {
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extend require impls I(Self) where .I1 = Self;
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}
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class C;
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// CHECK:STDERR: fail_todo_impl_as_constraint_containing_rewrite_for_generic_interface.carbon:[[@LINE+7]]:1: error: associated constant I1 not given a value in impl of interface I [ImplAssociatedConstantNeedsValue]
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// CHECK:STDERR: impl C as N {}
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// CHECK:STDERR: ^~~~~~~~~~~~~
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// CHECK:STDERR: fail_todo_impl_as_constraint_containing_rewrite_for_generic_interface.carbon:[[@LINE-11]]:7: note: associated constant declared here [AssociatedConstantHere]
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// CHECK:STDERR: let I1:! type;
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// CHECK:STDERR: ^~~~~~~~~
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// CHECK:STDERR:
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impl C as N {}
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fn F(_:! I(.Self) where .I1 = .Self) {}
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fn G() {
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// TODO: This crashes.
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// F(C);
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}
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// --- fail_no_require_self.carbon
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library "[[@TEST_NAME]]";
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interface Z(T:! type) {}
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class C;
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constraint Y {
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// `Self` must appear somewhere in the require decl, so it's in the interface
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// specific because we want to test a different self-type.
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require C impls Z(Self);
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}
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// Y does not have any extend require on `Self`.
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// CHECK:STDERR: fail_no_require_self.carbon:[[@LINE+4]]:1: error: impl as 0 interfaces, expected 1 [ImplOfNotOneInterface]
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// CHECK:STDERR: impl () as Y {}
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// CHECK:STDERR: ^~~~~~~~~~~~~~
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// CHECK:STDERR:
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impl () as Y {}
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// CHECK:STDOUT: --- fail_error_self_in_require.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %B.type: type = generic_named_constaint_type @B [concrete]
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// CHECK:STDOUT: %empty_struct: %B.type = struct_value () [concrete]
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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: %B.decl: %B.type = constraint_decl @B [concrete = constants.%empty_struct] {
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// CHECK:STDOUT: %X.patt: <error> = symbolic_binding_pattern X, 0 [concrete = <error>]
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// CHECK:STDOUT: } {
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: %X: <error> = symbolic_binding X, 0 [concrete = <error>]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: generic constraint @B(%X: <error>) {
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// CHECK:STDOUT: !definition:
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// CHECK:STDOUT:
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// CHECK:STDOUT: constraint {
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// CHECK:STDOUT: %Self: <error> = symbolic_binding Self, 1 [concrete = <error>]
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// CHECK:STDOUT: %B.WithSelf.decl = constraint_with_self_decl @B [concrete]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: .Self = %Self
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// CHECK:STDOUT: .A = <poisoned>
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// CHECK:STDOUT: .X = <poisoned>
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// CHECK:STDOUT: .A = <poisoned>
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// CHECK:STDOUT: .X = <poisoned>
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// CHECK:STDOUT: has_error
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// CHECK:STDOUT:
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// CHECK:STDOUT: !requires:
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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 @B(<error>) {}
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// CHECK:STDOUT:
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// CHECK:STDOUT: specific @B.WithSelf(<error>, <error>) {}
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// CHECK:STDOUT:
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