- converted more of AST and parser to use interfaces and explicit
structs for individual Go constructs (can be replaced now with
interface calls such that the parser becomes AST structure
independent, as suggested by rsc)
- added more tests (find all .go files under GOROOT)
- (temporarily) lost html links for identifiers when generating
html output
- TODO: lots of cleanups

R=r
OCL=25518
CL=25518

expressions.  (they were in pretty good shape; mostly cosmetic and HTML edits)

R=gri
DELTA=655  (226 added, 97 deleted, 332 changed)
OCL=25459
CL=25481

R=r
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=25449
CL=25449

R=ken
OCL=25448
CL=25448

Do a little work polishing the "zero value" discussion.

R=gri
DELTA=486  (129 added, 120 deleted, 237 changed)
OCL=25392
CL=25444

R=gri
DELTA=29  (0 added, 12 deleted, 17 changed)
OCL=25388
CL=25391

OCL=25292
CL=25383

Moved assignment compatibility to its own small section. Although most rules are type-specific,
some are not and it reduces redundancy to combine them.
Also, more experimentally, wrote a section on comparison compatibility.

R=gri
DELTA=382  (125 added, 122 deleted, 135 changed)
OCL=25355
CL=25382

R=r
OCL=25356
CL=25356

This is the only change in this CL: only rearrangement, no content change, so subsequent edits will be easier to understand.

R=gri
OCL=25353
CL=25353

Change <tt> to <code>

R=gri
DELTA=664  (222 added, 189 deleted, 253 changed)
OCL=25294
CL=25352

R=r
OCL=25343
CL=25343

R=rsc
OCL=25293
CL=25293

R=r
OCL=25278
CL=25278

R=tgs
DELTA=545  (545 added, 0 deleted, 0 changed)
OCL=25212
CL=25268

Put grammar productions into a box with a separate background color.

R=gri
DELTA=397  (132 added, 49 deleted, 216 changed)
OCL=25235
CL=25258

R=rsc
DELTA=149  (1 added, 145 deleted, 3 changed)
OCL=25231
CL=25234

Cut introduction.
Start rewrite.

R=gri
DELTA=201  (20 added, 118 deleted, 63 changed)
OCL=25226
CL=25229

No textual changes except for html formatting.
Seems like a fine intermediate step.

R=r
DELTA=7638  (4079 added, 3559 deleted, 0 changed)
OCL=25211
CL=25224

- accept embedded interfaces in interfaces
- missing: output incorrect, but at least all source code is accepted again

R=r
OCL=25223
CL=25223

DELTA=176  (172 added, 0 deleted, 4 changed)
OCL=25182
CL=25222

R=ken,gri,rsc
DELTA=185  (185 added, 0 deleted, 0 changed)
OCL=25133
CL=25169

examples:

	chan <- (chan int)
	chan (<- chan int)
	(map[string]func())("a": main)

R=ken
OCL=25151
CL=25151

TBR=rsc
OCL=25135
CL=25135

R=rsc
DELTA=23  (23 added, 0 deleted, 0 changed)
OCL=25088
CL=25134

R=r
DELTA=3  (0 added, 1 deleted, 2 changed)
OCL=25106
CL=25106

R=rsc
OCL=25105
CL=25105

make test a little stronger.

R=rsc
DELTA=94  (27 added, 39 deleted, 28 changed)
OCL=25085
CL=25087

R=r
DELTA=2  (0 added, 2 deleted, 0 changed)
OCL=25081
CL=25084

R=r
DELTA=169  (79 added, 23 deleted, 67 changed)
OCL=25079
CL=25083

inspired by expat's callback interface,
but a bit simpler thanks to go interfaces.

also serves as reference notes about XML.

the parser itself is unimplemented.

not in Makefiles, though it does build.

R=r
DELTA=425  (425 added, 0 deleted, 0 changed)
OCL=25077
CL=25080

add visitor functions to scan the flags.
add a way to set a flag.
add a flag test.

R=rsc
DELTA=169  (99 added, 19 deleted, 51 changed)
OCL=25076
CL=25078

R=ken
OCL=25075
CL=25075

TBR=r
OCL=25074
CL=25074

R=r
DELTA=205  (1 added, 157 deleted, 47 changed)
OCL=25071
CL=25073

R=ken
OCL=25072
CL=25072

assorted underscore cleanup

R=r
DELTA=488  (410 added, 3 deleted, 75 changed)
OCL=25070
CL=25070

	- use a lock instead of a thread in once
		avoids deadlock in recursive once calls
	- implement os.Setenv
	- remove "export" from some scripts
	- remove _ from names in time package
	- fix time test for non-MTV machines

R=r
DELTA=265  (87 added, 58 deleted, 120 changed)
OCL=25057
CL=25057

R=rsc
OCL=25054
CL=25054

as thread-safe as possible, given the surrounding system.
add stub RWLock implementation.

R=r
DELTA=852  (834 added, 6 deleted, 12 changed)
OCL=25046
CL=25053