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71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
/*
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* Copyright 2016-present Facebook, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <exception>
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#include <string>
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#include <type_traits>
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#include <folly/Demangle.h>
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#include <folly/FBString.h>
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#include <folly/Portability.h>
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namespace folly {
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/**
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* Debug string for an exception: include type and what(), if
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* defined.
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*/
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inline fbstring exceptionStr(const std::exception& e) {
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#ifdef FOLLY_HAS_RTTI
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fbstring rv(demangle(typeid(e)));
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rv += ": ";
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#else
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fbstring rv("Exception (no RTTI available): ");
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#endif
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rv += e.what();
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return rv;
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}
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// Empirically, this indicates if the runtime supports
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// std::exception_ptr, as not all (arm, for instance) do.
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#if defined(__GNUC__) && defined(__GCC_ATOMIC_INT_LOCK_FREE) && \
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__GCC_ATOMIC_INT_LOCK_FREE > 1
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inline fbstring exceptionStr(std::exception_ptr ep) {
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try {
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std::rethrow_exception(ep);
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} catch (const std::exception& e) {
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return exceptionStr(e);
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} catch (...) {
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return "<unknown exception>";
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}
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}
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#endif
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template <typename E>
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auto exceptionStr(const E& e) -> typename std::
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enable_if<!std::is_base_of<std::exception, E>::value, fbstring>::type {
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#ifdef FOLLY_HAS_RTTI
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return demangle(typeid(e));
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#else
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(void)e;
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return "Exception (no RTTI available) ";
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#endif
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}
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} // namespace folly
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