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Robert Griesemer 546bab8c29 go/scanner: report errors for incorrect line directives
Based on decision for #24183. This makes the go/scanner behavior
match cmd/compile behavior. Adjusted a go/printer test that assumed
silent behavior for invalid line directive, and added more scanner
tests verifying the correct error position and message for invalid
line directives.

The filenames in line directives now remain untouched by the scanner;
there is no cleanup or conversion of relative into absolute paths
anymore, in sync with what the compiler's scanner/parser are doing.
Any kind of filename transformation has to be done by a client. This
makes the scanner code simpler and also more predictable.

For #24183.

Change-Id: Ia091548e1d3d89dfdf6e7d82dab50bea05742ce3
Reviewed-on: https://go-review.googlesource.com/100235
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2018-03-15 18:01:05 +00:00
.github github: update Pull Request template 2018-02-21 02:07:46 +00:00
api syscall: support Getwd on all BSDs 2018-02-13 15:41:19 +00:00
doc doc/faq: add a Q&A about virus scanners 2018-02-28 05:55:31 +00:00
lib/time all: use HTTPS for iana.org links 2018-02-13 18:36:48 +00:00
misc runtime: identify special functions by flag instead of address 2018-03-15 17:31:57 +00:00
src go/scanner: report errors for incorrect line directives 2018-03-15 18:01:05 +00:00
test cmd/compile: implement CMOV on amd64 2018-03-15 16:41:59 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: update my name and spelling 2018-02-21 04:12:57 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS C: add Filippo Valsorda's @golang.org email 2018-03-12 22:29:04 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS
README.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
robots.txt

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