tree 018b87b585c8cbbfebd676c00bac077cc91204e2
parent 701f6a27b5c2499c1e84c28a3761eb2f1bf6fd7e
author Robert Griesemer <gri@golang.org> 1548199250 -0800
committer Robert Griesemer <gri@golang.org> 1549927340 +0000

cmd/compile/internal/syntax: allow more than one rune "unread"

Make it possible to "unread" more than one byte before the most
recently read rune. Use a better name than ungetr2 and make it
slightly more efficient.

R=Go1.13

Change-Id: I45d5dfa11e508259a972ca6560d1f78d7a51fe15
Reviewed-on: https://go-review.googlesource.com/c/158957
Reviewed-by: Russ Cox <rsc@golang.org>