From 0324ad68eed762ebf00ed4fb5a7ea2f2e3bd77b6 Mon Sep 17 00:00:00 2001 From: Boris Kolpackov Date: Tue, 22 Nov 2016 12:08:21 +0200 Subject: Add diagnostics facility --- butl/diagnostics.cxx | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 butl/diagnostics.cxx (limited to 'butl/diagnostics.cxx') diff --git a/butl/diagnostics.cxx b/butl/diagnostics.cxx new file mode 100644 index 0000000..e4c22dc --- /dev/null +++ b/butl/diagnostics.cxx @@ -0,0 +1,41 @@ +// file : butl/diagnostics.cxx -*- C++ -*- +// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd +// license : MIT; see accompanying LICENSE file + +#include + +#include // cerr + +using namespace std; + +namespace butl +{ + ostream* diag_stream = &cerr; + + void diag_record:: + flush () const + { + if (!empty_) + { + *diag_stream << os.str () << endl; + empty_ = true; + + if (epilogue_ != nullptr) + epilogue_ (*this); // Can throw. + } + } + + diag_record:: + ~diag_record () noexcept (false) + { + // Don't flush the record if this destructor was called as part of + // the stack unwinding. Right now this means we cannot use this + // mechanism in destructors, which is not a big deal, except for + // one place: exception_guard. So for now we are going to have + // this ugly special check which we will be able to get rid of + // once C++17 uncaught_exceptions() becomes available. + // + if (!std::uncaught_exception () || exception_unwinding_dtor) + flush (); + } +} -- cgit v1.1