cmLocalGenerator: Require a valid cmState::Snapshot in the ctor.

Refactor the local generator creation API to accept a
cmState::Snapshot.  Adjust MakeLocalGenerator to use the 'current'
snapshot in cases where there is no parent.  Create the snapshot
for subdirectories in cmMakefile::AddSubdirectory.

This means that snapshots are now created at the point of extending the tree,
as appropriate, and independently of the cmLocalGenerator and cmMakefile they
represent the state for.

1 files changed, 3 insertions, 2 deletions

diff --git a/Source/cmLocalVisualStudio10Generator.cxx b/Source/cmLocalVisualStudio10Generator.cxx
index 37b722a8c9..ad6a020f7e 100644
--- a/Source/cmLocalVisualStudio10Generator.cxx
+++ b/Source/cmLocalVisualStudio10Generator.cxx
@@ -63,8 +63,9 @@ class cmVS10XMLParser : public cmXMLParser
 //----------------------------------------------------------------------------
 cmLocalVisualStudio10Generator
 ::cmLocalVisualStudio10Generator(cmGlobalGenerator* gg,
-                                 cmLocalGenerator* parent):
-  cmLocalVisualStudio7Generator(gg, parent)
+                                 cmLocalGenerator* parent,
+                                 cmState::Snapshot snapshot):
+  cmLocalVisualStudio7Generator(gg, parent, snapshot)
 {
 }