charclass to avoid unnecessarily iterating over ranges.
    Also, use the fact that IntVector is an []int to avoid method calls.
    On my machine, this brings us from ~27500 ns/op to ~17500 ns/op in the benchmark I've added (it is also faster in the case where a range check
    doesn't help, added a benchmark for this too.)

    I'd also like to propose that "[]", and "[^]" be disallowed. They aren't useful as far as I can tell, they aren't widely supported, and they make reasoning about character classes a bit more complicated.

R=r
CC=golang-dev
https://golang.org/cl/1495041

Also added more tests for acosh, hypot, log, log10, log2
in all_test.go.

R=rsc
CC=golang-dev
https://golang.org/cl/1417041

R=rsc, r
CC=golang-dev
https://golang.org/cl/1238044

R=rsc
CC=golang-dev
https://golang.org/cl/1486041

On error, ReadSlice is defined to return the available data
and advance past that data, but it was not behaving that
way for err == ErrBufferFull, making it harder for callers to
handle well.

R=r
CC=golang-dev
https://golang.org/cl/1480041

- provide convenience functions for scanning strings
- enable Scanf etc.
- update doc comments

R=rsc
CC=golang-dev
https://golang.org/cl/1451044

R=gri
CC=golang-dev
https://golang.org/cl/1372042

R=r, iant
CC=golang-dev
https://golang.org/cl/1433042

R=rsc, r, iant
CC=golang-dev
https://golang.org/cl/1465041

R=rsc
CC=golang-dev
https://golang.org/cl/1475041

- implement scanning for all renamed types
	(compiler bug stops complex from being renamable,
	so it can't be tested but the code is there)
- %q %x for strings
- error handling now done with panic/recover

R=rsc
CC=golang-dev
https://golang.org/cl/1458041

- implement scanning for all renamed types
	(compiler bug stops complex from being renamable,
	so it can't be tested but the code is there)
- %q %x for strings
- error handling now done with panic/recover

R=rsc
CC=golang-dev
https://golang.org/cl/1458041

R=ken2
CC=golang-dev
https://golang.org/cl/1442042

Fixes #820.

R=rsc
CC=golang-dev
https://golang.org/cl/1453041

R=rsc
CC=golang-dev
https://golang.org/cl/1395041

R=rsc
CC=golang-dev
https://golang.org/cl/1258044

  For example, earlier, the regexp would accept SIGQUEUE_MAX
  as a unix signal with name SIGQUEUE. Now it is ignored.

R=iant
CC=golang-dev, golang-nuts, joel.sherrill
https://golang.org/cl/1452041

R=adg
CC=golang-dev
https://golang.org/cl/1454041

R=rsc
CC=golang-dev
https://golang.org/cl/1444041

R=golang-dev, adg
CC=golang-dev, rsc
https://golang.org/cl/1426042

"change the encoding of uints...".

R=r
CC=golang-dev
https://golang.org/cl/1436041

Also, move Do() to vector.go, so that Do() for IntVector and StringVector
is autogenerated.

The only files edited are Makefile, defs.go, and vector.go. The rest are
autogenerated with "make generate".

R=r
CC=golang-dev, hoisie
https://golang.org/cl/1435041

Fixes #821.

R=rsc
CC=golang-dev
https://golang.org/cl/1434041

R=r
CC=golang-dev
https://golang.org/cl/1433041

simplifies the code significantly.
Still TODO:
	- proper format handling
	- strings

R=rsc
CC=golang-dev
https://golang.org/cl/1432041

- reimplement integer scanning to handle renamed basic integer types
- start implementation of Fscanf and Scanf; not yet ready for general use.

This intermediate CL is a useful checkpoint. A similar change needs to be
done for float and complex, but it seemed worth getting the approach
reviewed before making those changes.

R=rsc
CC=golang-dev
https://golang.org/cl/1418041

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/1145044

It turns out that _cgo_malloc is used, via cmalloc in
runtime/cgocall.c, which is called by code generated by out.go
for the ·_C_CString function.  I can't find a call to
_cgo_free, but given _cgo_malloc we might as well keep
_cgo_free.  This patch fixes it so that it should work on
amd64.

R=rsc
CC=golang-dev
https://golang.org/cl/1399041

Fixes #819.

R=rsc
CC=golang-dev
https://golang.org/cl/1421041

R=r
CC=golang-dev
https://golang.org/cl/1404041

Fixes #805.

R=rsc
CC=golang-dev
https://golang.org/cl/1400041

and adjust conversion rules.

Also:
- clarification of type identity (no language change)
- adjust special rules for channel assignment/comparison to
  require identical element types (in correspondence to non-
  recursiveness of type compatibility)

R=rsc, iant, ken2, r
CC=golang-dev
https://golang.org/cl/1376042

R=rsc
CC=golang-dev
https://golang.org/cl/1388041

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/1382041

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/1383041

read from standard input.  Add description of scanning to
the package comment.

R=rsc
CC=golang-dev
https://golang.org/cl/1390041

from an array; one needs to write a[0:] instead.

R=rsc, r, iant, ken2
CC=golang-dev
https://golang.org/cl/1365041

Fix Rectangle.Clip.
It could return a non-canonical rectangle if its arguments
did not overlap.
e.g. Rect(0, 0, 10, 10).Clip(Rect(0, 20, 10, 30)) -> Rect(0, 20, 10, 10)

R=rsc, r
CC=golang-dev, golang-dev
https://golang.org/cl/1290041

R=rsc
CC=golang-dev
https://golang.org/cl/1363041

R=r, rsc
CC=golang-dev
https://golang.org/cl/1354041