An exercise in reflection and an unusual tool.

From the usage message:

usage: gotry [packagedirectory] expression ...
Given one expression, gotry attempts to evaluate that expression.
Given multiple expressions, gotry treats them as a list of arguments
and result values and attempts to find a function in the package
that, given the first few expressions as arguments, evaluates to
the remaining expressions as results.  If the first expression has
methods, it will also search for applicable methods.

If there are multiple expressions, a package directory must be
specified. If there is a package argument, the expressions are
evaluated in an environment that includes
	import . "packagedirectory"

Examples:
	gotry 3+4
		# evaluates to 7
	gotry strings '"abc"' '"c"' 7-5
		# finds strings.Index etc.
	gotry regexp 'MustCompile("^[0-9]+")' '"12345"' true
		# finds Regexp.MatchString

R=rsc, PeterGo, r2
CC=golang-dev
https://golang.org/cl/2352043

Gob decoding does not overwrite fields which are zero
in the encoder.
Fixes #1174.

R=r, r2
CC=golang-dev
https://golang.org/cl/2337044

Fixes malformed object message from nm etc.
Fixes #1180.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/2390042

Fixes #1177.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/2387042

R=r, r2
CC=golang-dev
https://golang.org/cl/2438041

R=golang-dev, adg, rsc
CC=golang-dev
https://golang.org/cl/2336044

R=Sam
CC=golang-dev
https://golang.org/cl/2437041

        Fixes #1181.

R=rsc, agl1, cw, r2
CC=golang-dev
https://golang.org/cl/2414041

        Fixes #1146.

R=rsc, agl1
CC=golang-dev
https://golang.org/cl/2380042

Permits one to easily put a timeout in a select:

select {
case <-ch:
	// foo
case <-time.After(1e6):
	// bar
}

R=r, rog, rsc, sameer1, PeterGo, iant, nigeltao_gnome
CC=golang-dev
https://golang.org/cl/2321043

R=adg, ehog.hedge
CC=golang-dev
https://golang.org/cl/2385041

stack is off by one if calling
through reflect.Call

R=rsc
CC=golang-dev
https://golang.org/cl/2400041

Auto-detect both if not set, and if GOARCH is not set use GOHOSTARCH.

GOHOSTARCH is used to set the -m32 or -m64 flags for gcc.

This is so that 64-bit can build binaries that run on 32-bit systems.

R=rsc, iant, brainman
CC=golang-dev
https://golang.org/cl/2342045

R=gri, rsc
CC=golang-dev
https://golang.org/cl/2212044

R=ken2
CC=golang-dev
https://golang.org/cl/2390041

Reported by Jeff Allen.

R=r, r2
CC=golang-dev
https://golang.org/cl/2385042

Enables lookup of _jabber._tcp.gmail.com's SRV record.

Fixes #1167.

R=r, r2
CC=golang-dev
https://golang.org/cl/2353043

Was printing words at SP instead of at FP
after shuffle due to nascent flag.

R=r, r2
CC=golang-dev
https://golang.org/cl/2316044

R=ken2
CC=golang-dev
https://golang.org/cl/2346044

R=rsc, ken2, r, rsc1
CC=golang-dev
https://golang.org/cl/2297042

R=golang-dev, adg, rsc
CC=golang-dev
https://golang.org/cl/2341049

was
x.go:7: must call (&b).*Buffer·Write

now
x.go:7: method b.Write is not an expression, must be called

Fixes #1171.

R=ken2
CC=golang-dev
https://golang.org/cl/2384042

R=ken2
CC=golang-dev
https://golang.org/cl/2365044

was
x.go:4: invalid operation: 1 <- "foo" (send to receive-only type int)

now
x.go:4: invalid operation: 1 <- "foo" (send to non-chan type int)

R=ken2
CC=golang-dev
https://golang.org/cl/2330042

Fixes #1161.

R=rsc, cwvh
CC=golang-dev
https://golang.org/cl/2317044

R=gmiller, adg
CC=golang-dev
https://golang.org/cl/2362043

R=r
CC=golang-dev
https://golang.org/cl/2383041

R=adg, rsc
CC=golang-dev
https://golang.org/cl/2370043

Fixes #1167.

R=r, r2
CC=golang-dev
https://golang.org/cl/2290044

The hash_next_and_deref was a dreg from a
previous large value scheme.

Fixes #1163.

R=r, r2
CC=golang-dev
https://golang.org/cl/2369043

TBR=adg
CC=golang-dev
https://golang.org/cl/2290045

Fixes #1165.

R=ken2
CC=golang-dev
https://golang.org/cl/2339042

R=ken2
CC=golang-dev
https://golang.org/cl/2331045

R=ken2
CC=golang-dev
https://golang.org/cl/2373043

R=golang-dev, r2
CC=golang-dev
https://golang.org/cl/2372042

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/2358041

Working on issue 1101.

R=golang-dev, rsc, adg
CC=golang-dev
https://golang.org/cl/2338042

R=golang-dev, r2
CC=golang-dev
https://golang.org/cl/2336042

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/2301045

R=rsc, ken2, r
CC=golang-dev
https://golang.org/cl/2355043