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Richard Smith
1331ade57f
This is necessary if the source type is an adapter, as we would not otherwise be able to determine what type it adapts and hence could be converted to.
64 lines
1.7 KiB
Plaintext
64 lines
1.7 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/int.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/class/adapter/convert_incomplete.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/adapter/convert_incomplete.carbon
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// --- already_complete.carbon
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library "[[@TEST_NAME]]";
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class Adapter(T:! type) {
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extend adapt T*;
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}
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class X {}
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// Trigger completion of Adapter(X) here.
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var x: Adapter(X);
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fn F(p: Adapter(X)*) {
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let x: X* = *p as X*;
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}
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// --- can_be_completed.carbon
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library "[[@TEST_NAME]]";
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class Adapter(T:! type) {
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extend adapt T*;
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}
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class X {}
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fn F(p: Adapter(X)*) {
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// The conversion here triggers completion of Adapter(X)
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// so we can determine what it adapts.
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let x: X* = *p as X*;
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}
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// --- fail_incomplete.carbon
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library "[[@TEST_NAME]]";
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class Adapter(T:! type);
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class X {}
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fn F(p: Adapter(X)*) {
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// CHECK:STDERR: fail_incomplete.carbon:[[@LINE+7]]:15: error: cannot convert expression of type `Adapter(X)` to `X*` with `as` [ConversionFailure]
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// CHECK:STDERR: let x: X* = *p as X*;
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// CHECK:STDERR: ^~~~~~~~
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// CHECK:STDERR: fail_incomplete.carbon:[[@LINE+4]]:15: note: type `Adapter(X)` does not implement interface `Core.As(X*)` [MissingImplInMemberAccessNote]
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// CHECK:STDERR: let x: X* = *p as X*;
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// CHECK:STDERR: ^~~~~~~~
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// CHECK:STDERR:
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let x: X* = *p as X*;
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}
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