tree 2ecf604f915d4e64d859ce8ba71ac51f2375fc85
parent 29cfbcfef42cc1ae77b35fb2cd65245e8ce8f706
author Matthew Dempsky <mdempsky@google.com> 1465261145 -0700
committer Matthew Dempsky <mdempsky@google.com> 1471383129 -0700

cmd/compile/internal/syntax: match old parser errors and line numbers

This makes a bunch of changes to package syntax to tweak line numbers
for AST nodes. For example, short variable declaration statements are
now associated with the location of the ":=" token, and function calls
are associated with the location of the final ")" token. These help
satisfy many unit tests that assume the old parser's behavior.

Because many of these changes are questionable, they're guarded behind
a new "gcCompat" const to make them easy to identify and revisit in
the future.

A handful of remaining tests are too difficult to make behave
identically. These have been updated to execute with -newparser=0 and
comments explaining why they need to be fixed.

all.bash now passes with both the old and new parsers.

Change-Id: Iab834b71ca8698d39269f261eb5c92a0d55a3bf4