this is just a branch.
next cl will update and add to build

R=rsc
DELTA=4528  (2264 added, 2264 deleted, 0 changed)
OCL=17670
CL=17672

R=rsc
DELTA=206  (79 added, 25 deleted, 102 changed)
OCL=17652
CL=17669

convlit.go:17: error: incompatible type in initialization
convlit.go:18: error: incompatible types in binary expression
convlit.go:19: error: incompatible types in binary expression
convlit.go:20: error: incompatible types in binary expression
convlit.go:21: error: incompatible types in binary expression
convlit.go:23: error: cannot convert non-integer constant
convlit.go:24: error: integer type overflow
convlit.go:25: error: floating point overflow

R=rsc
DELTA=5  (0 added, 0 deleted, 5 changed)
OCL=17649
CL=17661

R=ken
OCL=17643
CL=17643

R=ken
OCL=17625
CL=17641

the right answer when a type name redefines an existing type.

R=rsc
DELTA=133  (53 added, 8 deleted, 72 changed)
OCL=17637
CL=17639

in general

R=rsc
DELTA=2  (1 added, 0 deleted, 1 changed)
OCL=17624
CL=17624

Beginnings of values.
typestrings are grabbed from the environment.

R=rsc
APPROVED=rsc
DELTA=1046  (952 added, 3 deleted, 91 changed)
OCL=17593
CL=17621

R=r
OCL=17601
CL=17601

R=ken
OCL=17598
CL=17598

R=rsc
DELTA=2  (0 added, 1 deleted, 1 changed)
OCL=17589
CL=17595

R=ken
OCL=17592
CL=17592

R=r
DELTA=16  (14 added, 1 deleted, 1 changed)
OCL=17584
CL=17584

sys: add sys.reflect
runtime: add canfail flag for later

R=ken
OCL=17583
CL=17583

R=r
OCL=17572
CL=17572

they're gone.

R=ken
OCL=17569
CL=17569

	* print int as int, not P.int
	* write type info for non-exported types
	   in its own new section.

ar:
	skip over rest of line after $$

R=ken
OCL=17568
CL=17568

R=r
DELTA=419  (409 added, 5 deleted, 5 changed)
OCL=17524
CL=17530

R=rsc
DELTA=1  (0 added, 1 deleted, 0 changed)
OCL=17514
CL=17514

	use libbio instead of maintaining own buffer

libbio:
	always use vlong offsets; die if off_t is too small

R=r
DELTA=163  (23 added, 63 deleted, 77 changed)
OCL=17508
CL=17512

R=r
OCL=17510
CL=17510

convlit1.go:6:15: error: composite literal requires array, map, or struct type
convlit1.go:5:16: error: incompatible type for element 0 in composite literal
convlit1.go:10:15: error: incompatible types in binary expression

R=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=17506
CL=17509

- added validation test verifying that pretty output compiles with 6g again (disabled at the moment)
- replaced another recursive function with an interative solution

R=r
OCL=17505
CL=17505

R=r
DELTA=44  (10 added, 9 deleted, 25 changed)
OCL=17502
CL=17502

will make reading type info easier.

R=r
DELTA=21  (2 added, 1 deleted, 18 changed)
OCL=17491
CL=17501

R=r
DELTA=3  (3 added, 0 deleted, 0 changed)
OCL=17497
CL=17500

R=gri
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=17476
CL=17499

- converted 2 right-recursive parsing functions into iterative versions
- renamed node.go -> ast.go (clearer)

R=r
OCL=17496
CL=17498

	make sure methods end up immediately following
	the struct they are methods on.
ar:
	eliminate duplicate definitions from __.PKGDEF.
	check that multiple .6 do not give different defs for same
		exported type/var/func/const.
	increase ar header name size from 16 to 64 bytes

R=r
DELTA=379  (333 added, 18 deleted, 28 changed)
OCL=17477
CL=17481

R=rsc
DELTA=72  (69 added, 0 deleted, 3 changed)
OCL=17478
CL=17480

R=r
OCL=17463
CL=17463

R=r
DELTA=15  (6 added, 7 deleted, 2 changed)
OCL=17447
CL=17461

- added a note with respect the difference of semantics of *p++ in Go vs C

R=r
DELTA=14  (6 added, 2 deleted, 6 changed)
OCL=17455
CL=17457

- as a result deleted some more code

R=r
OCL=17449
CL=17449

R=r
OCL=17437
CL=17437

  treating ":" as lowest-level binary operator
- more precise error message for composites
- added flag -columns (false) - when set, prints precise error column
- a few more tests

R=r
OCL=17428
CL=17428

- in selftest mode (-t) interpret comments of the form /* ERROR */ and /* SYNC */
  and validate reported errors with the error markings in a file
- added initial selftest.go file

Also:
- fixed an issue with empty blocks
- generally report better error messages
- added many more tests to the test script (essentially all .go programs which
  have no syntax errors)

R=r
OCL=17426
CL=17426

R=rsc
DELTA=421  (357 added, 17 deleted, 47 changed)
OCL=17388
CL=17401

R=rsc
OCL=17398
CL=17398

the comment talked about printing, but now
t->recur is only used for typehash.
in typehash it is important to compute different
hashes for the different basic types.

add test that makes sure an interface { X() int8 }
cannot be used as interface { X() int64 }

R=ken
OCL=17396
CL=17396