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Robert Griesemer ac45cb9aa0 cmd/compile/internal/syntax: permit /*line file:line:col*/ directives
R=go1.11

This implements parsing of /*line file:line*/ and /*line file:line:col*/
directives and also extends the optional column format to regular //line
directives, per #22662.

For a line directive to be recognized, its comment text must start with
the prefix "line " which is followed by one of the following:

:line
:line:col
filename:line
filename:line:col

with at least one : present. The line and col values must be unsigned
decimal integers; everything before is considered part of the filename.

Valid line directives are:

//line :123
//line :123:8
//line foo.go:123
//line C:foo.go:123	(filename is "C:foo.go")
//line C:foo.go:123:8	(filename is "C:foo.go")
/*line ::123*/		(filename is ":")

No matter the comment format, at the moment all directives act as if
they were in //line comments, and column information is ignored.
To be addressed in subsequent CLs.

For #22662.

Change-Id: I1a2dc54bacc94bc6cdedc5229ee13278971f314e
Reviewed-on: https://go-review.googlesource.com/86037
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2018-02-12 22:57:52 +00:00
.github all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
api text/template: revert CL 66410 "add break, continue actions in ranges" 2018-02-06 05:00:01 +00:00
doc all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
lib/time lib/time: follow redirects in curl 2018-01-24 04:39:28 +00:00
misc runtime: use NOFRAME on mips and mips64 2018-02-12 21:41:32 +00:00
src cmd/compile/internal/syntax: permit /*line file:line:col*/ directives 2018-02-12 22:57:52 +00:00
test cmd/compile: use unsigned loads for multi-element comparisons 2018-02-06 18:24:33 +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 late Go 1.10 contributors 2018-01-06 04:52:00 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: update late Go 1.10 contributors 2018-01-06 04:52:00 +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
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VERSION [release-branch.go1.10] go1.10rc2 2018-02-07 16:12:58 +00:00

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