- fix a bug w/ optional semicolons

R=rsc
DELTA=46  (24 added, 0 deleted, 22 changed)
OCL=31306
CL=31311

R=ken
OCL=31310
CL=31310

R=gri
APPROVED=gri
DELTA=73  (48 added, 0 deleted, 25 changed)
OCL=31302
CL=31308

Please correct as needed.

R=rsc,r
DELTA=10  (4 added, 1 deleted, 5 changed)
OCL=31305
CL=31305

R=rsc
DELTA=35  (0 added, 34 deleted, 1 changed)
OCL=31301
CL=31303

- fixed typo in parser.go
- removed test w/ syntax errors from gofmt test script

R=rsc
DELTA=25  (21 added, 0 deleted, 4 changed)
OCL=31296
CL=31298

R=ken
OCL=31295
CL=31295

R=r
DELTA=12  (0 added, 0 deleted, 12 changed)
OCL=31240
CL=31290

R=r
DELTA=242  (68 added, 69 deleted, 105 changed)
OCL=31239
CL=31289

R=r
DELTA=16  (3 added, 1 deleted, 12 changed)
OCL=31121
CL=31288

R=r
DELTA=186  (55 added, 8 deleted, 123 changed)
OCL=31117
CL=31287

R=r
DELTA=192  (52 added, 43 deleted, 97 changed)
OCL=31116
CL=31286

R=gri
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=31115
CL=31285

R=gri
DELTA=70  (7 added, 17 deleted, 46 changed)
OCL=31113
CL=31283

R=austin
DELTA=3  (0 added, 0 deleted, 3 changed)
OCL=31112
CL=31282

R=r
DELTA=208  (37 added, 63 deleted, 108 changed)
OCL=31111
CL=31281

tests to use new reflect interface.

also make tests a real gotest.

depends on CL 31107

R=r
DELTA=582  (56 added, 194 deleted, 332 changed)
OCL=31108
CL=31279

R=ken
OCL=31122
CL=31278

in place of sigi, sigt.

R=ken
OCL=31118
CL=31277

rename ntype.go and nvalue.go to type.go and value.go

R=r
DELTA=4295  (761 added, 2819 deleted, 715 changed)
OCL=31238
CL=31276

be independent of each other

R=rsc
DELTA=28  (28 added, 0 deleted, 0 changed)
OCL=31271
CL=31273

R=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=31270
CL=31272

s.output.Data() was being retrieved before the synchronization
point, which meant that it could be retrieved before the
goroutine wrote it.  Using gccgo this caused random errors.

R=gri
DELTA=2  (1 added, 0 deleted, 1 changed)
OCL=31046
CL=31267

and make 5c, 8c use them.

centralizes reachability analysis
and switch generation.

now 8c doesn't have spurious warnings
in pkg/runtime.

R=ken
OCL=31266
CL=31266

  Natural, Integer, and Rational numbers
- added Value() methods to access small Natural and Integers
  as uint64 or int64 respectively, and to get the components
  of Rational numbers
- fixed a bug with Integer creation
- removed some _'s from names
- added more comments in places
- added test cases

R=rsc
DELTA=184  (127 added, 11 deleted, 46 changed)
OCL=31210
CL=31265

needed for heap allocation if variable escapes.

package main
func main(){
	var i interface{} = 42;
	switch v := i.(type) {
	case int:
		println(&v, v);
	}
}

R=ken
OCL=31245
CL=31245

	x << "a"
	1 << int(2)

R=ken
OCL=31244
CL=31244

R=rsc
APPROVED=rsc
DELTA=46  (0 added, 5 deleted, 41 changed)
OCL=31241
CL=31243

R=rsc
APPROVED=rsc
DELTA=32  (26 added, 4 deleted, 2 changed)
OCL=31172
CL=31242

* give genwrapper and genembedtramp the same signature.
* move duint8, duint16, duint32, duint64, duintptr into gc.
* tidy genwrapper.
* bug involving struct field symbols in signature list.
  (hash-order dependent so hard to trigger)
* new Type print format %#-T like %#T but omits
  names on function arguments.

R=ken
OCL=31237
CL=31237

missing break after error.

dot symbol bug fix: leave sym alone
(was incorrect for inserted cross-package dots).

R=ken
OCL=31234
CL=31236

for now, canSet stays.
i will look into getting rid of it in
a future CL.

R=r
DELTA=420  (419 added, 0 deleted, 1 changed)
OCL=31231
CL=31235

R=ken
OCL=31233
CL=31233

interface = (*int)(nil) is not the same as
interface = nil.

package main
func main() {
	var x interface{} = (*int)(nil);
	println(x.(*int));
}

R=ken
OCL=31232
CL=31232

R=ken
OCL=31230
CL=31230

when implicit assignment would have been okay.

R=ken
OCL=31225
CL=31227

package main

func main() {
       var x interface {} = 42;
       switch x := x.(type) {
       case int:
       case foo:
       }
}

before:
x.go:7: non-type case in type switch
x.go:7: inappropriate case for a type switch

now:
x.go:7: foo: undefined

R=ken
OCL=31221
CL=31221

R=r
DELTA=179  (172 added, 6 deleted, 1 changed)
OCL=31215
CL=31220

package main
func main() {
       var x interface{};
       switch x {
       case 41:
       case "b":
       }
}

before:
x.go:5: fatal error: exprcmp

now:
x.go:5: illegal types for operand: EQ
	interface { }
	int
x.go:6: illegal types for operand: EQ
	interface { }
	string

R=ken
OCL=31217
CL=31219

  * use structs instead of interfaces
  * compiler lays out data structures ahead of time,
    so no more parsing of strings.
  * unified reflect data structures with interface
    runtime data structures.
  * richer data structures should enable reflection
    on chans and maps, but not implemented here.

R=r,iant
DELTA=1179  (1179 added, 0 deleted, 0 changed)
OCL=31107
CL=31213