references during the parsing of :=.  the base
problem is that when reading

	a,b,c,d

the parser makes those refer to existing variables,
which might create a few stub top-level ones
for undefined names, but then if a := is the next
token, we need to undo those stubs.

this was causing problems in multifile packages
in which one file used a := variable named rpc
and the other imported a package named rpc.

R=ken
OCL=35446
CL=35446

R=r
DELTA=3  (2 added, 0 deleted, 1 changed)
OCL=35443
CL=35445

apply gofmt to rand reflect regexp rpc runtime sort strconv strings sync syscall testing time unicode unsafe utf8

R=gri
DELTA=1409  (79 added, 24 deleted, 1306 changed)
OCL=35415
CL=35437

- soft-tab separated columns can be discarded if empty and DiscardEmptyColumns is set
- hard-tab separated columns are never discarded

R=rsc
DELTA=63  (42 added, 7 deleted, 14 changed)
OCL=35421
CL=35435

R=r
DELTA=3214  (904 added, 2260 deleted, 50 changed)
OCL=35425
CL=35427

for lower-level clients:
	* expose p.Skip
	* expose p.Unmarshal
	* wildcard struct field "Any"
	* unmarshal into bool
	* unmarshal into xml.Name
	* unmarshal into pointer

R=r
DELTA=61  (50 added, 5 deleted, 6 changed)
OCL=35372
CL=35422

R=gri
DELTA=1359  (138 added, 32 deleted, 1189 changed)
OCL=35408
CL=35420

R=gri
DELTA=566  (4 added, 14 deleted, 548 changed)
OCL=35410
CL=35419

R=gri
DELTA=4023  (104 added, 27 deleted, 3892 changed)
OCL=35416
CL=35418

R=rsc
APPROVED=rsc
DELTA=58  (52 added, 3 deleted, 3 changed)
OCL=35417
CL=35417

- 64 bit OMINUS
- added bunch of missing arm syscalls

R=rsc
APPROVED=rsc
DELTA=203  (189 added, 3 deleted, 11 changed)
OCL=35412
CL=35414

TBR=gri
OCL=35411
CL=35411

- simplified some code

R=rsc
DELTA=19  (0 added, 0 deleted, 19 changed)
OCL=35405
CL=35407

R=gri
DELTA=456  (6 added, 3 deleted, 447 changed)
OCL=35398
CL=35406

got rid of regexps.
primary bug fix is that // inside /* */ do not get stripped anymore,
so that the text inside

/*
int a;
// int b;
int c;
*/

is

int a;
// int b;
int c;

before, the "int b;" line was being uncommented too.

R=gri
DELTA=65  (13 added, 42 deleted, 10 changed)
OCL=35334
CL=35404

TBR=rsc
DELTA=16  (10 added, 4 deleted, 2 changed)
OCL=35379
CL=35403

R=rsc
DELTA=96  (74 added, 2 deleted, 20 changed)
OCL=35391
CL=35402

R=rsc
DELTA=5  (5 added, 0 deleted, 0 changed)
OCL=35387
CL=35401

R=gri
DELTA=900  (106 added, 31 deleted, 763 changed)
OCL=35384
CL=35396

R=gri
DELTA=2560  (127 added, 177 deleted, 2256 changed)
OCL=35388
CL=35395

R=rsc
APPROVED=rsc
DELTA=104  (46 added, 56 deleted, 2 changed)
OCL=35392
CL=35394

that have not changed since I applied gofmt.

R=gri
DELTA=456  (77 added, 3 deleted, 376 changed)
OCL=35378
CL=35383

Currently, the description says that +ve numbers are westwards of UTC.
Typically, timezones are specified with +ve numbers running east of Greenwich.
For example, San Francisco is specified as UTC-8. Also, when calling
time.Localtime(), the following is returned on my box in PDT:

{Year:2009 Month:10 Day:5 Hour:18 Minute:55 Second:6 Weekday:1 ZoneOffset:-25200
Zone:PDT}

Note that the ZoneOffset is negative. This leads me to suspect that the
description is mistaken.

R=rsc
APPROVED=rsc
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=35356
CL=35377

R=rsc
DELTA=39  (0 added, 0 deleted, 39 changed)
OCL=35360
CL=35376

go/test: passes 75% (256/339)

R=rsc
APPROVED=rsc
DELTA=142  (53 added, 4 deleted, 85 changed)
OCL=35367
CL=35375

R=rsc
APPROVED=rsc
DELTA=73  (45 added, 28 deleted, 0 changed)
OCL=35363
CL=35366

build breakage.

R=rsc
APPROVED=rsc
DELTA=10  (4 added, 2 deleted, 4 changed)
OCL=35362
CL=35365

R=rsc
DELTA=31  (15 added, 3 deleted, 13 changed)
OCL=35364
CL=35364

- better handling of line breaks in expression lists
- fixed line breaks around label decls
- remove ()'s around if, for, switch expressions
- simple index expressions don't require blanks
- better line breaks around declarations of different kind

R=rsc
DELTA=404  (369 added, 8 deleted, 27 changed)
OCL=35354
CL=35359

R=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=35355
CL=35358

TODOs include filtering, and a unit test.

R=rsc
APPROVED=r
DELTA=280  (249 added, 1 deleted, 30 changed)
OCL=35262
CL=35348

character sets.

R=r
DELTA=339  (257 added, 1 deleted, 81 changed)
OCL=35344
CL=35346

verified as acceptable on my calibrated home monitor.

R=gri
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=35340
CL=35342

R=r
DELTA=546  (545 added, 0 deleted, 1 changed)
OCL=35318
CL=35341

The lexer is the bottom level.
Most clients will use the Unmarshal method,
not yet implemented, which will behave like
json.Unmarshal.

R=r
DELTA=1115  (766 added, 219 deleted, 130 changed)
OCL=35316
CL=35339

R=gri
DELTA=31  (7 added, 17 deleted, 7 changed)
OCL=35336
CL=35338

methods on slices, pointers and values.

R=iant,rsc,gri
DELTA=173  (150 added, 1 deleted, 22 changed)
OCL=35333
CL=35337

R=gri
DELTA=32  (13 added, 12 deleted, 7 changed)
OCL=35317
CL=35332

R=r
DELTA=16  (4 added, 2 deleted, 10 changed)
OCL=35320
CL=35331

R=rsc
DELTA=23  (0 added, 20 deleted, 3 changed)
OCL=35330
CL=35330