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Chandler Carruth
369b8fd06f
`-Wunused-template` was added to `-Wunused`, so clean up the things it found. One of them was a bug in the Clang warning that I've worked around and reported upstream: https://github.com/llvm/llvm-project/issues/218429
38 lines
1.3 KiB
C++
38 lines
1.3 KiB
C++
// 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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#ifndef CARBON_TESTING_BASE_CAPTURE_STD_STREAMS_H_
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#define CARBON_TESTING_BASE_CAPTURE_STD_STREAMS_H_
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#include <string>
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namespace Carbon::Testing {
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// Implementation details.
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namespace Internal {
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auto BeginStdStreamCapture() -> void;
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auto EndStdStreamCapture(std::string& out, std::string& err) -> void;
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} // namespace Internal
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// Calls the provided function while capturing both `stdout` and `stderr`. The
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// `out` and `err` strings are set to whatever is captured after the function
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// returns.
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//
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// Note that any output that is captured will not be visible when running, which
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// can make debugging tests that use this routine difficult. Make sure to either
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// print back out or otherwise expose any of the contents of the captured output
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// that are needed when debugging.
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template <typename FnT>
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auto CallWithCapturedOutput(std::string& out, std::string& err, FnT function)
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-> auto {
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Internal::BeginStdStreamCapture();
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auto result = function();
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Internal::EndStdStreamCapture(out, err);
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return result;
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}
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} // namespace Carbon::Testing
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#endif // CARBON_TESTING_BASE_CAPTURE_STD_STREAMS_H_
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