was incrementing lineno twice for
the \n after a // comment.

R=r
DELTA=3  (0 added, 2 deleted, 1 changed)
OCL=21984
CL=22021

Instead of trying to make open arrays look like arrays (which they aren't,
they just look like them), I decided to call them "slice types". As a result
they have value semantics, and one can really talk about what they really are.

Note:
- There are lots of missing details
- There are probably lots of mistakes

Looking for some initial feedback.

R=r
DELTA=444  (180 added, 189 deleted, 75 changed)
OCL=21769
CL=22020

R=ken
DELTA=20  (20 added, 0 deleted, 0 changed)
OCL=21889
CL=21929

has to do with printing
patched it out

R=r
OCL=21921
CL=21923

receivers in methods.
put back original code for hilbert/bignum

R=r
OCL=21910
CL=21920

rvalue promoted to method receiver.
fixes to bignum that failed.

R=r
OCL=21827
CL=21827

TBR=rsc
OCL=21766
CL=21766

TBR=rsc
DELTA=34  (33 added, 0 deleted, 1 changed)
OCL=21718
CL=21718

it's 25% faster and runs with 40% less memory allocation than before

R=rsc
DELTA=20  (15 added, 0 deleted, 5 changed)
OCL=21690
CL=21690

lines marked BUG are rewrites working around 6g bug.

R=rsc
DELTA=161  (42 added, 2 deleted, 117 changed)
OCL=21689
CL=21689

make sure type of expr is T not just []int

R=ken
OCL=21688
CL=21688

R=r
OCL=21685
CL=21687

convert to printf.
increase count to 1000 - maps are faster now.
add cases for structure values as key and maps.

R=rsc
DELTA=197  (66 added, 18 deleted, 113 changed)
OCL=21683
CL=21686

R=r
OCL=21684
CL=21684

leaving golden.out alone for now.

R=ken
DELTA=13  (0 added, 0 deleted, 13 changed)
OCL=21682
CL=21682

other [] cleanup.

convert() is gone.

R=r
DELTA=352  (144 added, 68 deleted, 140 changed)
OCL=21660
CL=21662

R=r
DELTA=21  (12 added, 0 deleted, 9 changed)
OCL=21653
CL=21653

R=gri
DELTA=15  (13 added, 1 deleted, 1 changed)
OCL=21632
CL=21639

R=r
OCL=21637
CL=21637

cant assign to closed array

R=r
OCL=21634
CL=21634

R=ken
OCL=21616
CL=21616

R=r
DELTA=192  (145 added, 8 deleted, 39 changed)
OCL=21609
CL=21614

R=r
DELTA=1  (1 added, 0 deleted, 0 changed)
OCL=21577
CL=21603

x.go:11: illegal types for operand: AS
	*I
	*T
	(*interface vs *struct)

R=r
DELTA=10  (8 added, 0 deleted, 2 changed)
OCL=21457
CL=21602

use malloc by default.
free stacks.

R=r
DELTA=424  (333 added, 29 deleted, 62 changed)
OCL=21553
CL=21584

TBR=r
OCL=21580
CL=21583

mainly a syntactic change: the compiler representations don't change
(chan and map are now hidden pointers like string).

R=ken
OCL=21578
CL=21582

fix bugs left over from *[] to [] conversion.

TBR=r
OCL=21576
CL=21581

R=r
OCL=21563
CL=21571

R=r
OCL=21570
CL=21570

R=r
OCL=21569
CL=21569

R=ken
OCL=21568
CL=21568

R=r
OCL=21567
CL=21567

R=ken
OCL=21566
CL=21566

R=ken
OCL=21565
CL=21565

R=r
OCL=21564
CL=21564

R=r
DELTA=3  (0 added, 0 deleted, 3 changed)
OCL=21558
CL=21558

R=r,presotto
DELTA=1239  (935 added, 281 deleted, 23 changed)
OCL=21041
CL=21539

R=r
DELTA=1551  (1550 added, 0 deleted, 1 changed)
OCL=21404
CL=21538

R=r
DELTA=5  (2 added, 0 deleted, 3 changed)
OCL=21508
CL=21510