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https://github.com/carbon-language/carbon-lang.git
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Richard SmithandGeoff Romer
1ec8ac7ef9
Instead of hardcoding which types are copyable, add a `Core.Copy` interface to perform copying. Move almost all the current copy support to that interface. Some remaining pieces are still using builtin logic after this PR: * For tuples and structs, builtin logic is used to perform elementwise copies. This also supports copying *adapters of* tuples and structs, which seems like it may not be desirable, especially for non-extending adapters. A `Copy` impl is provided for tuples of at most 2 elements, so that `Core.Copy` constraints are satisfied, but we can't implement this generally until we have variadics support, and don't yet have a mechanism to generalize this to structs. * For `enum` types imported from C++, builtin logic is used to perform a copy. This is temporary until we have a mechanism to identify these types from an impl in the prelude. One lowering test in `toolchain/lower/testdata/class/generic.carbon` is disabled for now, as it causes a crash in the lowering code due to an ABI mismatch between the call signature in the lowered declaration of a specific function and the call that is generated in the specific callee. Fixing this is a little involved, and will be done in a separate PR. --------- Co-authored-by: Geoff Romer <gromer@google.com>
87 lines
3.4 KiB
Plaintext
87 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/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/array/element_mismatches.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/array/element_mismatches.carbon
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// --- fail_arg_wrong_type.carbon
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library "[[@TEST_NAME]]";
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class C {}
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// CHECK:STDERR: fail_arg_wrong_type.carbon:[[@LINE+7]]:22: error: cannot implicitly convert expression of type `()` to `C` [ConversionFailure]
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// CHECK:STDERR: var a: array(C, 3) = ({}, (), true);
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// CHECK:STDERR: ^~~~~~~~~~~~~~
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// CHECK:STDERR: fail_arg_wrong_type.carbon:[[@LINE+4]]:22: note: type `()` does not implement interface `Core.ImplicitAs(C)` [MissingImplInMemberAccessNote]
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// CHECK:STDERR: var a: array(C, 3) = ({}, (), true);
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// CHECK:STDERR: ^~~~~~~~~~~~~~
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// CHECK:STDERR:
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var a: array(C, 3) = ({}, (), true);
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// --- fail_var_wrong_type.carbon
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library "[[@TEST_NAME]]";
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class C {}
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class D {}
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var a: (D, C, D);
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// CHECK:STDERR: fail_var_wrong_type.carbon:[[@LINE+7]]:22: error: cannot implicitly convert expression of type `D` to `C` [ConversionFailure]
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// CHECK:STDERR: var b: array(C, 3) = a;
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// CHECK:STDERR: ^
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// CHECK:STDERR: fail_var_wrong_type.carbon:[[@LINE+4]]:22: note: type `D` does not implement interface `Core.ImplicitAs(C)` [MissingImplInMemberAccessNote]
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// CHECK:STDERR: var b: array(C, 3) = a;
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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var b: array(C, 3) = a;
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var c: (C, D, D);
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// CHECK:STDERR: fail_var_wrong_type.carbon:[[@LINE+7]]:22: error: cannot copy value of type `C` [CopyOfUncopyableType]
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// CHECK:STDERR: var d: array(C, 3) = c;
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// CHECK:STDERR: ^
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// CHECK:STDERR: fail_var_wrong_type.carbon:[[@LINE+4]]:22: note: type `C` does not implement interface `Core.Copy` [MissingImplInMemberAccessNote]
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// CHECK:STDERR: var d: array(C, 3) = c;
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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var d: array(C, 3) = c;
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// --- fail_arg_too_short.carbon
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library "[[@TEST_NAME]]";
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class C {}
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// CHECK:STDERR: fail_arg_too_short.carbon:[[@LINE+4]]:22: error: cannot initialize array of 3 elements from 2 initializers [ArrayInitFromLiteralArgCountMismatch]
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// CHECK:STDERR: var a: array(C, 3) = ({}, {});
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// CHECK:STDERR: ^~~~~~~~
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// CHECK:STDERR:
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var a: array(C, 3) = ({}, {});
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// --- fail_var_too_short.carbon
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library "[[@TEST_NAME]]";
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class C {}
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var a: (C, C);
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// CHECK:STDERR: fail_var_too_short.carbon:[[@LINE+4]]:22: error: cannot initialize array of 3 elements from tuple with 2 elements [ArrayInitFromExprArgCountMismatch]
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// CHECK:STDERR: var b: array(C, 3) = a;
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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var b: array(C, 3) = a;
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// --- fail_arg_too_long.carbon
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// CHECK:STDERR: fail_arg_too_long.carbon:[[@LINE+4]]:23: error: cannot initialize array of 1 element from 3 initializers [ArrayInitFromLiteralArgCountMismatch]
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// CHECK:STDERR: var a: array((), 1) = ((), (), ());
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// CHECK:STDERR: ^~~~~~~~~~~~
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// CHECK:STDERR:
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var a: array((), 1) = ((), (), ());
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