Add diagnostics facility

1 files changed, 70 insertions, 0 deletions

diff --git a/bpkg/diagnostics.cxx b/bpkg/diagnostics.cxx
new file mode 100644
index 0000000..2bee18e
--- /dev/null
+++ b/bpkg/diagnostics.cxx
@@ -0,0 +1,70 @@
+// file      : bpkg/diagnostics.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <bpkg/diagnostics>
+
+#include <iostream>
+
+using namespace std;
+
+namespace bpkg
+{
+  // Trace verbosity level.
+  //
+  uint16_t verb;
+
+  // Diagnostic facility, base infrastructure.
+  //
+  ostream* diag_stream = &cerr;
+
+  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 (!empty_ && (!uncaught_exception () /*|| exception_unwinding_dtor*/))
+    {
+      *diag_stream << os_.str () << endl;
+
+      if (epilogue_ != nullptr)
+        epilogue_ (*this); // Can throw.
+    }
+  }
+
+  // Diagnostic facility, project specifics.
+  //
+
+  void simple_prologue_base::
+  operator() (const diag_record& r) const
+  {
+    if (type_ != nullptr)
+      r << type_ << ": ";
+
+    if (name_ != nullptr)
+      r << name_ << ": ";
+  }
+
+  void location_prologue_base::
+  operator() (const diag_record& r) const
+  {
+    r << loc_.file << ':' << loc_.line << ':' << loc_.column << ": ";
+
+    if (type_ != nullptr)
+      r << type_ << ": ";
+
+    if (name_ != nullptr)
+      r << name_ << ": ";
+  }
+
+  const basic_mark error ("error");
+  const basic_mark warn ("warning");
+  const basic_mark info ("info");
+  const basic_mark text (nullptr);
+  const fail_mark<failed> fail;
+}