- use explicit expression lists instead of binary trees to represent lists of the form a, b, c
(per discussion w/ Russ)
- use explicit nodes for various language constructs for better readability
- various adjustments in parsing and printing

next steps:
- clean up AST fully so it can be checked in as library

R=r
OCL=26371
CL=26371

- no syntactic or semantic change

R=r
DELTA=45  (24 added, 18 deleted, 3 changed)
OCL=26349
CL=26368

to allow room for type hash
needed for log-time type switch.

R=r
OCL=26354
CL=26354

R=rsc
DELTA=14  (12 added, 0 deleted, 2 changed)
OCL=26278
CL=26348

R=rsc
DELTA=19  (19 added, 0 deleted, 0 changed)
OCL=26284
CL=26336

- various parser fixes to match updated spec (&&, &^=, label decls, const decls)
- using html template for directory and error page in doc server
- show compile errors inplace in the source
- cleanups

R=rsc
OCL=26287
CL=26287

R=r
OCL=26281
CL=26285

R=rsc
APPROVED=rsc
DELTA=19042  (19042 added, 0 deleted, 0 changed)
OCL=26268
CL=26270

R=rsc
DELTA=18  (18 added, 0 deleted, 0 changed)
OCL=26266
CL=26266

close two more bugs.

R=ken
OCL=26226
CL=26226

go_spec.html: document const type propagation

R=ken
OCL=26223
CL=26225

various bug fixes and tests involving constants.

test/const1.go is the major new test case.

R=ken
OCL=26216
CL=26224

OCL=26222
CL=26222

R=rsc
OCL=26220
CL=26220

runtime not finished.

R=r
OCL=26217
CL=26217

- correctly associate comments with declarations
  (available through AST)
- very raw printing of interface
- much more functionality, now needs some formatting, sorting, etc.

R=r
OCL=26213
CL=26213

R=rsc
DELTA=4  (0 added, 2 deleted, 2 changed)
OCL=26208
CL=26212

R=rsc
DELTA=14  (0 added, 0 deleted, 14 changed)
OCL=26159
CL=26206

for pretty printer purposes - now properly ignored as white space since we
have line/col information)
- changed sample use in comment to an actually compiled function to make sure
sample is actually working
- added extra tests (checking line and column values, and the tokenize function)

R=rsc
DELTA=253  (61 added, 67 deleted, 125 changed)
OCL=26143
CL=26181

R=gri
OCL=26158
CL=26158

R=gri
DELTA=5  (3 added, 0 deleted, 2 changed)
OCL=26155
CL=26157

R=r
OCL=26152
CL=26152

R=r
OCL=26146
CL=26146

R=r
OCL=26142
CL=26142

if T has pointer methods.  this is just a heuristic
but it catches the problem robert ran into and
lets me put the larger interface issues aside for
now.  found one bug in pretty.

R=ken
OCL=26141
CL=26141

R=r
OCL=26129
CL=26131

Make Fstat, Readdirnames, and Readdir methods
on os.File.

R=r
DELTA=281  (79 added, 3 deleted, 199 changed)
OCL=25891
CL=26130

R=r
DELTA=115  (102 added, 0 deleted, 13 changed)
OCL=25953
CL=26128

- fixed a parameter name in tabwriter

R=rsc
DELTA=110  (21 added, 17 deleted, 72 changed)
OCL=26123
CL=26127

R=r
DELTA=84  (63 added, 4 deleted, 17 changed)
OCL=25950
CL=26126

R=rsc
OCL=26093
CL=26093

DIR.

R=ken,rsc
DELTA=49  (41 added, 2 deleted, 6 changed)
OCL=26057
CL=26092

R=r
OCL=26090
CL=26090

(little progress with interface printing, but now shows a
list of exported function names)

R=r
OCL=26082
CL=26082

R=rsc
DELTA=7  (0 added, 0 deleted, 7 changed)
OCL=26080
CL=26080

- fixed a bug with character escapes (before: allowed arbitrary long sequences)

R=r
DELTA=63  (33 added, 19 deleted, 11 changed)
OCL=26010
CL=26070

declared in cases and heap allocation

R=r
OCL=26064
CL=26064

R=rsc
DELTA=20  (20 added, 0 deleted, 0 changed)
OCL=26054
CL=26062

- more comments in parser

R=r
OCL=26060
CL=26060

R=rsc
DELTA=431  (430 added, 0 deleted, 1 changed)
OCL=25975
CL=26059