tree ceef293d3c8fb2bbc0051de9cb05fab42109e5e2
parent 48287e55b2888f3dfc4275ce1bbf90bdcaad7258
author Todd Wang <toddw@google.com> 1461321987 -0700
committer Todd Wang <toddw@google.com> 1461321987 -0700

Add VDLIsZero, and use it in VDLWrite.

This CL adds the VDLIsZero method, which is used to check whether
the method receiver is the VDL zero value.  This is used in
codegen to make zero struct field checking both simpler and faster.

Also simplified both VDLRead and VDLWrite codegen, to make things
more consistent and easier to understand.

MultiPart: 1/5
Change-Id: I381a8fe7672787fb2bacb835e81fda99b01ed21b