tree 05089c098de45437df219b05eee6d1f46c2a0435
parent a9c1c056a75b2453f8d4bfdec8c70f64900db609
author danrubel <danrubel@google.com> 1545150673 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1545150673 +0000

Update AstBuilder to build AST with nullable types

... as part of adding NNBD as outlined in
https://github.com/dart-lang/language/issues/110

This CL updates the parser to recognize two specialized comments at the
beginning of a library of the form '//@NNBD' and '//@NNBD*' for use
by the analyzer to aid developers when converting their libraries
to be non-nullable by default.

In addition, the AstBuilder now populates the generated analyzer AST
with nullable type information.

Change-Id: I80d221dd138973aa32f05bde631245d9ac6ee10f
Reviewed-on: https://dart-review.googlesource.com/c/87540
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Dan Rubel <danrubel@google.com>