Go patch committed: Resolve import parser ambiguity

[Ian Lance Taylor <iant at golang dot org>]

This patch to the Go frontend by Than McIntosh resolves an importing
ambiguity for more complex function calls.  It tweaks the exporter for
inlinable function bodies to work around a problem with importing of
function calls whose function expressions are not simple function
names.  In the bug in question, the function body exporter was writing
out a function call of the form

       (*(*FuncTyp)(var))(arg)

which produced an export data representation of

       *$convert(<type 5>, var)(x)

which is hard to parse unambiguously.  Fix: change the export data
emitter to introduce parens around the function expression for more
complex calls.

Testcase for this bug is in https://golang.org/cl/197217.

This fixes http://golang.org/issue/34503.

Bootstrapped and ran Go testsuite on x86_64-pc-linux-gnu.  Committed
to mainline.

Ian

Attachment: patch.txt
Description: Text document