tree df858cc14e82a241fc1658c8dae798a1f25401d1
parent 019f0ad21b11f34a771efbe945d8e56d3a2dc6a5
author Suharsh Sivakumar <suharshs@google.com> 1432268613 -0700
committer Suharsh Sivakumar <suharshs@google.com> 1432268620 -0700

vdl/compile: Modify CompileExpr to support compilation of package-path
qualified identifiers.

CompileExpr used to use a dummy file that didn't have imports that were
compiled into Env.
This caused compilation of package-path quailified identifiers to fail.
We solved this by introducing ExtractExprPackagePaths that allows users to
retrieve all package paths in expressions. Then CompileExpr will include
all needed expr that are also compiled into Env in the file.
Now CompileExprs will succeed in compiling "a/b/c".Foo if "a/b/c" is
in the Env.

Change-Id: I100bf7378b76bb6a4c5b6518774138b31caf94d0