cmListFileBacktrace: Hide the context-stack implementation detail.

The backtrace will soon not be implemented in terms of a stack of
cmListFileContext objects.  Keep the cmListFileContext in the API
for convenience for now.

1 files changed, 30 insertions, 0 deletions

diff --git a/Source/cmListFileCache.cxx b/Source/cmListFileCache.cxx
index 3e3d708..2756cd2 100644
--- a/Source/cmListFileCache.cxx
+++ b/Source/cmListFileCache.cxx
@@ -400,6 +400,11 @@ bool cmListFileParser::AddArgument(cmListFileLexer_Token* token,
     }
 }
 
+void cmListFileBacktrace::Append(cmListFileContext const& context)
+{
+  this->push_back(context);
+}
+
 //----------------------------------------------------------------------------
 void cmListFileBacktrace::MakeRelative()
 {
@@ -416,6 +421,31 @@ void cmListFileBacktrace::MakeRelative()
   this->Relative = true;
 }
 
+void cmListFileBacktrace::PrintTitle(std::ostream& out)
+{
+  if (this->empty())
+    {
+    return;
+    }
+  out << (this->front().Line ? " at " : " in ") << this->front();
+}
+
+void cmListFileBacktrace::PrintCallStack(std::ostream& out)
+{
+  if (size() <= 1)
+    {
+    return;
+    }
+
+  const_iterator i = this->begin() + 1;
+  out << "Call Stack (most recent call first):\n";
+  while(i != this->end())
+    {
+    cmListFileContext const& lfc = *i;
+    out << "  " << lfc << "\n";
+    ++i;
+    }
+}
 
 //----------------------------------------------------------------------------
 std::ostream& operator<<(std::ostream& os, cmListFileContext const& lfc)