also only time-limit if a value is provided.

R=rsc
DELTA=9  (4 added, 2 deleted, 3 changed)
OCL=18917
CL=18920

R=rsc
DELTA=1075  (1028 added, 31 deleted, 16 changed)
OCL=18865
CL=18918

BUG=1474670
TBR=r
DELTA=6  (6 added, 0 deleted, 0 changed)
OCL=18839
CL=18843

  printing output
- not yet enabled

R=r
OCL=18842
CL=18842

TBR=rsc
OCL=18833
CL=18833

R=r
OCL=18830
CL=18830

R=r
OCL=18807
CL=18807

- language for type guards
- fixed language for break statements

Also: Removed uses of "we" and replaced by impersonal language.
Minor cosmetic changes.

DELTA=237  (160 added, 34 deleted, 43 changed)
OCL=18620
CL=18800

R=r,gri
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=18781
CL=18785

R=r
DELTA=47  (47 added, 0 deleted, 0 changed)
OCL=18581
CL=18748

R=r
OCL=18741
CL=18741

a select clause.

R=ken
DELTA=20  (0 added, 20 deleted, 0 changed)
OCL=18731
CL=18739

R=r
OCL=18738
CL=18738

R=rsc
DELTA=111  (107 added, 0 deleted, 4 changed)
OCL=18720
CL=18725

R=rsc
DELTA=21  (21 added, 0 deleted, 0 changed)
OCL=18709
CL=18718

out of the enclosing loop.

R=ken
DELTA=20  (20 added, 0 deleted, 0 changed)
OCL=18686
CL=18714

R=ken
OCL=18713
CL=18713

to distinguish not computed (0) vs trivial (1).

add missing ullmancalc on function args.

R=ken
OCL=18711
CL=18711

Multiplication of a Hilbert matrix with its inverse using
Bignum.Rationals as a test case for rational arithmetic.

R=r
OCL=18706
CL=18706

i isolated last night.  does not fix rob's
interface-smashing bug.

R=ken
OCL=18698
CL=18698

- added a test

R=r
OCL=18687
CL=18687

R=r
OCL=18685
CL=18685

R=rsc
DELTA=13  (9 added, 0 deleted, 4 changed)
OCL=18682
CL=18684

R=rsc
DELTA=100  (70 added, 10 deleted, 20 changed)
OCL=18663
CL=18669

R=r
OCL=18646
CL=18646

R=ken
OCL=18630
CL=18630

assumes cas->send == 2 for default case.

R=ken
OCL=18628
CL=18628

accomodate empty type table in 6l.

R=r
DELTA=10  (2 added, 8 deleted, 0 changed)
OCL=18601
CL=18605

- re-enabled bug118.go for pretty

R=r
OCL=18604
CL=18604

always show original name

R=ken
OCL=18603
CL=18603

R=r
OCL=18602
CL=18602

R=r
OCL=18599
CL=18599

R=ken,rsc
DELTA=14  (14 added, 0 deleted, 0 changed)
OCL=18555
CL=18598

R=r
OCL=18580
CL=18582

	package main
	func main() {
		var i interface { } = 1;
		a := i.(*[]byte);
	}

interface { } is int, not *[]uint8
throw: interface conversion

	package main
	func main() {
		var i interface { };
		a := i.(*[]byte);
	}

interface is nil, not *[]uint8
throw: interface conversion

	package main
	func main() {
		i := sys.unreflect(0, "*bogus");
		a := i.(*[]byte);
	}

interface { } is *bogus, not *[]uint8
throw: interface conversion

R=r
DELTA=30  (24 added, 2 deleted, 4 changed)
OCL=18548
CL=18565

R=rsc
DELTA=28  (14 added, 4 deleted, 10 changed)
OCL=18561
CL=18563

recognize methods for a variable whose type is a named type
which is a pointer type.  Add bug117 to test this case.

R=r
DELTA=24  (22 added, 0 deleted, 2 changed)
OCL=18547
CL=18554

	* allow conversion between nil interface and any type.
	* mark signatures as DUPOK so that multiple .6 can
	  contain sigt.*[]byte and only one gets used.

R=ken
OCL=18538
CL=18542

current spec forbids it:
    The type specified by the type name is called ``receiver
    base type''.  The receiver base type must be a type
    declared in the current file, and it must not be a pointer
    type.

R=r
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=18527
CL=18541

R=rsc
DELTA=4  (1 added, 1 deleted, 2 changed)
OCL=18528
CL=18533