Add diagnostics support

1 files changed, 33 insertions, 0 deletions

diff --git a/brep/diagnostics.cxx b/brep/diagnostics.cxx
new file mode 100644
index 0000000..5ab34b6
--- /dev/null
+++ b/brep/diagnostics.cxx
@@ -0,0 +1,33 @@
+// file      : brep/diagnostics.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
+// license   : MIT; see accompanying LICENSE file
+
+#include <brep/diagnostics>
+
+#include <cassert>
+#include <exception>
+
+using namespace std;
+
+namespace build
+{
+  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 (!data_.empty () &&
+        (!std::uncaught_exception () /*|| exception_unwinding_dtor*/))
+    {
+      data_.back ().msg = os_.str (); // Save last message.
+
+      assert (epilogue_ != nullptr);
+      (*epilogue_) (move (data_)); // Can throw.
+    }
+  }
+}