This CL only copies files and updates build tags.
Substantive changes will come in follow-ups.
This is a workaround for git's lack of rename/copy tracking.
Tested with go1.6, go1.7, and tip (go1.8).
Change-Id: Id88a05273fb963586b228d5e5dfacab32133a960
Reviewed-on: https://go-review.googlesource.com/32630
Reviewed-by: Robert Griesemer <gri@golang.org>
because its export data doesn't contain file position information.
Change-Id: Ia3ab54ae8a493666b9ad63577aa8fad513385052
Reviewed-on: https://go-review.googlesource.com/32299
Reviewed-by: Robert Griesemer <gri@golang.org>
This is a short-term stop-gap to keep the builders happy.
Change-Id: I87171c20bf44f36fd2c4d7213211217de6110fdd
Reviewed-on: https://go-review.googlesource.com/32293
Reviewed-by: Robert Griesemer <gri@golang.org>
(The first was go-review.googlesource.com/c/31813)
Fixes issue golang/go#17565
Change-Id: I61c124e041af689913aedebdde654197c5526228
Reviewed-on: https://go-review.googlesource.com/32034
Reviewed-by: Robert Griesemer <gri@golang.org>
This package is provided as a stop-gap until gccgo uses the same export
data format as gc. Once that occurs, this package will be deprecated
and eventually deleted. The API is similar to (a subset of) gcexportdata.
Change-Id: I3398dbb8eab508a24d12036bbadaa60c2c1e77b3
Reviewed-on: https://go-review.googlesource.com/31822
Reviewed-by: Robert Griesemer <gri@golang.org>
The standard go/internal/gccgoimporter package is essentially unusable
behind the go/importer.For API, so this change makes a copy of it in
x/tools. A follow-up change will expose a small but usable API to it.
Change-Id: Ica5092267ecafb78e1d983c86aa46e4e0bef02d5
Reviewed-on: https://go-review.googlesource.com/31854
Reviewed-by: Robert Griesemer <gri@golang.org>
+ test
Change-Id: I0842795ece634e4441b17a10009d26bfc2a8481a
Reviewed-on: https://go-review.googlesource.com/31818
Reviewed-by: Robert Griesemer <gri@golang.org>
Supporting user-defined TestMain functions requires that we generate a
"testmain" package for each testable package, rather than a single one
for the entire program. This entails these API changes:
1. (*ssa.Program).{CreateTestMainPackage,FindTests} both now
accept only a single package. Existing clients that pass them
multiple packages must call them from a loop.
2. (*ssa.Program).FindTests returns an additional result, the the
optional TestMain *ssa.Function. Existing clients may discard it.
Also:
- Test the new logic using the SSA interpreter
- add ssautil.MainPackages helper
- callgraph: allow multiple main packages, and analyze them all
- ssadump -run: allow multiple main/test packages, and run each in a new interpreter
- minor simplifications to some callers (e.g. guru)
Fixesgolang/go#9553
Change-Id: Ia7de9bd27448fb08b8d172ba5cdbcf37a762b7a0
Reviewed-on: https://go-review.googlesource.com/25102
Reviewed-by: Robert Griesemer <gri@golang.org>
When adding imports to an existing import declaration, ensure that
the target declaration will be printed with parentheses. This allows
all of the imported packages to be printed, not just the first one.
Fixesgolang/go#17212
Change-Id: Ie5de5ec9bca6169650336ee2ea98334817e64e48
Reviewed-on: https://go-review.googlesource.com/29688
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
The "sort" package is no longer quite as low-level as it once was.
Change-Id: Ic62d780841ef1172f65d4c00ec500994f94cb4b7
Reviewed-on: https://go-review.googlesource.com/30931
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
If the parens of an ast.GenDecl are dropped, move the documentation
of the ImportSpec above the import statement, otherwise the the
code is invalid.
Fixesgolang/go#15432.
Change-Id: I715750b8f528380b96a6bc8b5f216043937976c2
Reviewed-on: https://go-review.googlesource.com/22415
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Previously, a trailing slash would cause "foo/" to be treated as the
name of a package, with comical results.
Fixedgolang/go#14584
Change-Id: I660f8a079bbd63d3645812e516a9264c8e080e61
Reviewed-on: https://go-review.googlesource.com/30452
Reviewed-by: Robert Griesemer <gri@golang.org>
When merging import declarations into a single block, AddNamedImport
modifies the list of declarations in the provided file while
iterating over the list. Take care to adjust the index into the list
so as to not skip entries or fall off the end.
Fixesgolang/go#17213
Change-Id: I807246f762c965ea1fc51eb57759f6088336db86
Reviewed-on: https://go-review.googlesource.com/29681
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
...to avoid executing the supportAVX2 assembly function.
Also, combine all no-op intrinsics into a single function.
Change-Id: Ic65a80d3a6df52c3850c34406f034781057a0991
Reviewed-on: https://go-review.googlesource.com/28711
Reviewed-by: Robert Griesemer <gri@golang.org>
Backport of https://go-review.googlesource.com/27814 changes to
bexport.go.
With this, the gcimporter15 is again up-to-date and in sync with both
the compiler's export code, and the compiler's and std lib gcimporter's
import code.
Change-Id: I8e229660eb78ddc1506b7b96a89c81ff083e0412
Reviewed-on: https://go-review.googlesource.com/27914
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Both functions had documentation referring to BuildAll when the
function is now called Build.
Change-Id: I59cce397a0a72bf7fa36f9798e2b07bb6b1da726
Reviewed-on: https://go-review.googlesource.com/25084
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Only unary CallExprs with no ellipsis, f(x), are ambiguous.
Change-Id: If4f17445ab0725dee916992db133eac5536133a7
Reviewed-on: https://go-review.googlesource.com/24552
Reviewed-by: Robert Griesemer <gri@golang.org>
Go is being proposed as an officially supported language for elements of
OpenStack:
https://review.openstack.org/#/c/312267/
As such, repos that exist in OpenStack's git infrastructure
are likely to become places from which people might want to go get
things. Allow optional .git suffixes to allow writing code that
depends on git.openstack.org repos that will work with older go versions
while we wait for this support to roll out.
Change-Id: I1f7be6b7aae63f9c554dbcdbfa46855bcff321df
Reviewed-on: https://go-review.googlesource.com/23362
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
BImportData now requires a token.FileSet.
Column numbers are not exported, and are always reported as 1.
Line numbers greater than the limit (currently 64K) are reported as 1.
+ Test that file/line info is correctly preserved for the entire
standard library.
Change-Id: I80cf370685320240dfb262d36fafd6cdf8569bfb
Reviewed-on: https://go-review.googlesource.com/22788
Reviewed-by: Robert Griesemer <gri@golang.org>
...now that gc's export data records fewer dependencies.
Change-Id: Ie0f68f1f7b0825f6d2c100dfe189be017383db60
Reviewed-on: https://go-review.googlesource.com/22584
Reviewed-by: Robert Griesemer <gri@golang.org>
...which is used by $GOROOT/test/goprint.go.
Change-Id: I4626b8fae3f87d9c8dd8cdcd8c05036955a36262
Reviewed-on: https://go-review.googlesource.com/22560
Reviewed-by: Robert Griesemer <gri@golang.org>
Don't export position info for now. Enabled/disabled with a flag.
The importer recognizes the chosen format automatically.
Change-Id: I055818eb9dba50cc97f40eb92220258a1ddbfbec
Reviewed-on: https://go-review.googlesource.com/22427
Reviewed-by: Alan Donovan <adonovan@google.com>
Read and write position info.
Change-Id: Ibe4a914ff51911bbda656b08f1397132e495ab8a
Reviewed-on: https://go-review.googlesource.com/22098
Reviewed-by: Alan Donovan <adonovan@google.com>
This extracts the overlay context and archive parsing from guru into
buildutil.
At least one tool (gogetdoc) has a vendored copy of this code already,
and more tools implementing the same functionality will follow.
The new code in buildutil is an almost identical copy of the code in
guru (names aside), except for the following changes:
- Instead of reading into a bytes.Buffer, we read directly into a []byte
of appropriate size
- sameFile first attempts a simple comparison of path.Clean'ed paths.
Change-Id: I97cd978ccc10722e3648e5e10625fa7f1407f202
Reviewed-on: https://go-review.googlesource.com/21805
Reviewed-by: Alan Donovan <adonovan@google.com>
Apply style improvements to TestFromDir from golang/go@b6cd6d7d32,
in order to keep them in sync.
Check for error when creating a directory, its successful existence is a
precondition for the test to run.
Helps golang/go#11490.
Change-Id: I87054114c84aead96977f603ca3bd9eccfcfbd5e
Reviewed-on: https://go-review.googlesource.com/21795
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Per https://groups.google.com/forum/#!topic/golang-announce/qu_rAphYdxY
this change deletes the packages
go/exact
go/gccgoimporter
go/gcimporter
go/importer
go/types
cmd/vet
from the x/tools repo and any files depending on those packages
building against Go 1.4.
x/tools packages depending on any of these libraries must use the
respective versions from the std lib or use vendored versions if
building against 1.4.
Remaining packages may or may not build against Go 1.4 anymore
and will not be supported against 1.4.
Change-Id: I1c655fc30aee49b6c7326ebd4eb1bb0836ac97e0
Reviewed-on: https://go-review.googlesource.com/20810
Reviewed-by: Alan Donovan <adonovan@google.com>
This is simply a copy of std lib's go/internal/gcimporter/bimport.go
with updated header comment and build tag. No semantic changes.
This will fix part of the x/tools build break at tip. The other part
is to adjust bexport.go (next CL).
Change-Id: Ibc37fae7e0d0447fdea9e3a733aa38589735c59a
Reviewed-on: https://go-review.googlesource.com/21543
Reviewed-by: Alan Donovan <adonovan@google.com>
Although these flags are harmless on linux, they
cause clang on darwin to issue an error about
unused flags (-lpthread). We only care about compilation
so we don't need them.
Change-Id: I0fc756e2f4d7a829d43b5aa912c4e4b24a802a1c
Reviewed-on: https://go-review.googlesource.com/21283
Reviewed-by: Robert Griesemer <gri@golang.org>
The os/user.lookup function no longer exists so instead we use
os/user.current. (This function also existed in go1.5.)
Change-Id: Ic66d80acc186289331f1023e0145370feab6a001
Reviewed-on: https://go-review.googlesource.com/21281
Reviewed-by: Robert Griesemer <gri@golang.org>
It has few interesting effects on aliasing and it contains a lot of
unsafe code that we can't analyze.
Change-Id: I66d3592ea7797802c6be36eb30fd17e2ee307e50
Reviewed-on: https://go-review.googlesource.com/21260
Reviewed-by: Robert Griesemer <gri@golang.org>
This fixes some print calls with wrong format directives. Additionally,
struct initialisers were changed to use keyed fields, purely to reduce
the amount of noise generated by go vet.
Change-Id: Ib9f6fd8f2dff7ce84826478de0ba83dda9746270
Reviewed-on: https://go-review.googlesource.com/21180
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Fix the following issue detected by golint:
import.go:9:1: package comment should be of the form "Package importer ..."
It makes the package comment more consistent with other packages.
Change-Id: I1415066c136ce249af19d70848a38203caf7c9c7
Reviewed-on: https://go-review.googlesource.com/21177
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
The previous CL added a duplicate InvalidType to the predecl table so
that it tracked the one used by gc, but this caused it to fail an
assertion of uniqueness, and I ran the wrong tests.
Change-Id: I56342046cea328e503d917127f5b12205df7999a
Reviewed-on: https://go-review.googlesource.com/20870
Reviewed-by: Robert Griesemer <gri@golang.org>
Although invalid types and unknown constant values should never appear
in .a files (since gc will stop with an error before writing export
data), they can now be faithfully encoded and decoded. This makes the
protocol robust for IDE-like applications that must deal with incomplete
or incorrect programs.
(Corresponding std lib CL: https://go-review.googlesource.com/20828)
Change-Id: I539ffd951b90f01705a7f23ec778c623c729d9a0
Reviewed-on: https://go-review.googlesource.com/20827
Reviewed-by: Robert Griesemer <gri@golang.org>
The binary import/export functionality depends on go/constant from
go1.6 - make it only available if we build against go1.6. Eventually
this packet will be replaced by std lib go/importer functionality.
Change-Id: If96cf2e889daf1250152d7719afa64ad1ba8fb0e
Reviewed-on: https://go-review.googlesource.com/20716
Reviewed-by: Alan Donovan <adonovan@google.com>
Also: renamed file to match 1.7 tag.
Fixesgolang/go#14824.
Change-Id: Iea92292d93c1140e3396678bc37f50f0348e616a
Reviewed-on: https://go-review.googlesource.com/20694
Reviewed-by: Michael Hudson-Doyle <michael.hudson@canonical.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
This change copies the respective changes from https://golang.org/cl/20605.
There is a format conflict here - we are going to track tip, not 1.6.
This change should fix the issue when testing against tip.
Fixesgolang/go#14824.
Change-Id: I58e79cc65748e7a3e5c8486c6cee339884110a07
Reviewed-on: https://go-review.googlesource.com/20693
Reviewed-by: Alan Donovan <adonovan@google.com>
The BuilderModeFlag function does not work with flag packages (such as
Google's) that define their own FlagSet. This change exposes a type
that satisifies flag.Value insted of a function. That type
is *BuilderMode; there's no need for a separate wrapper type.
Change-Id: I8095b80de499e3c52a29a5c1996d1b1fe3799358
Reviewed-on: https://go-review.googlesource.com/20330
Reviewed-by: Michael Matloob <matloob@golang.org>
This CL makes little observable difference to the behavior but paves the
way for streaming 'referrers' and (later) 'implements' queries which
scan the entire workspace, but print each result as soon as it is found.
The go/loader package now exposes a hook, AfterTypeCheck, that lets
clients inspect each package as soon as it is type-checked, and also
modify it, for instance to release unneeded data structures.
A 'referrers' query applied to an exported object must scan the entire
workspace. It uses this hook so to gather uses of the query object in
streaming fashion. However, for now, it still accumulates the results
and prints them all at the end, though I propose to change that in a
follow-up.
Code details:
- The referrers logic had a 2-iteration loop to load first the query
package and then if necessary the enlarged program. The second
iteration has now been unrolled and split into globalReferrers.
- Queries for package names (whether in a package declaration or
a qualified identifier) have been split off into packageReferrers.
It now loads all direct importers of the query package,
which catches some references that were missing before.
(It used to inspect only the forward dependencies of the query
package.)
Also:
- Referrers.Pos (the position of query identifier) was removed from the
JSON output. It's a nuisance to compute now, and it's already
absent from the plain output.
(In a follow-up, I plan to simplify the information content of the
JSON output exactly what is currently printed in the plain output.)
Change-Id: Ia5677636dc7b0fe4461a5d393107665757fb9a97
Reviewed-on: https://go-review.googlesource.com/19794
Reviewed-by: Daniel Morsing <daniel.morsing@gmail.com>
This fixes a bug in guru describe.
Also, add a test of IntuitiveMethodSet.
Change-Id: Ied3780807afd88e664fdb186619499670529fe33
Reviewed-on: https://go-review.googlesource.com/20166
Reviewed-by: Daniel Morsing <daniel.morsing@gmail.com>
+ test
Change-Id: I8db03e19ebb4cf3888f259457aaa3c931da23f24
Reviewed-on: https://go-review.googlesource.com/20109
Reviewed-by: Robert Griesemer <gri@golang.org>
DeleteNamedImport deletes the import with a given
name and path from a parsed file, if present.
imports uses this function to delete named imports.
Fixesgolang/go#8149.
Change-Id: I84539d5627191c45f06db2d008507aee4d3b1eb2
Reviewed-on: https://go-review.googlesource.com/19951
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This will be used by the guru command's -scope argument.
+ test
Change-Id: I5bf38b544809e4518e2c22a73ec3349a5d2c09fc
Reviewed-on: https://go-review.googlesource.com/19746
Reviewed-by: Michael Matloob <matloob@golang.org>
These nodes are common in incomplete programs.
Change-Id: Iff9750050c78762f0cb8bebc7739584c197d661e
Reviewed-on: https://go-review.googlesource.com/19509
Reviewed-by: Michael Matloob <matloob@golang.org>
This is a backport of the respective changes in golang.org/cl/19393.
For golang/go#14215.
Change-Id: I8d60dd6daa827a60597f3af925e6732914537319
Reviewed-on: https://go-review.googlesource.com/19394
Reviewed-by: Alan Donovan <adonovan@google.com>
For the default build.Context, the Package.Goroot flag indicates when a
package was loaded from the standard library. Until now, the loader
used it to enable the typechecker's intrinsics for the "unsafe" package.
This seemed like a good check, but it is troublesome for clients that
use a nonstandard build.Context. For example, if a client defines
nonstandard Context hooks that load all packages, whether standard or
user-defined, from a flat sstable, there is no way for those hooks to
indicate which packages should have this flag set and which not. As a
result the contents of the "unsafe" package directory are treated as Go
source code when they are merely documentation.
Change-Id: Iea0a7cc9877507d73606391293971a28279c4e4b
Reviewed-on: https://go-review.googlesource.com/19188
Reviewed-by: Robert Griesemer <gri@golang.org>
This change prevents test code to slip into package gcimporter15 and
fixes a weird situation that the test passes but the package doesn't
exist.
For example, we can see the situation with Go 1.6 like the follwoing:
go build
./gcimporter_test16.go:20: undefined: MustHaveGoBuild
./gcimporter_test16.go:45: undefined: testPath
go test
PASS
ok golang.org/x/tools/go/gcimporter15 0.896s
Change-Id: I95550574ccd1b2273072c700c28a82c791c16c63
Reviewed-on: https://go-review.googlesource.com/18950
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
The hosting service was shut down on January 25, 2016 and a few tests
started to fail like the following:
=== RUN TestRepoRootForImportPath
--- FAIL: TestRepoRootForImportPath (2.47s)
vcs_test.go:129: RepoRootForImport("code.google.com/p/go"):
unable to detect version control system for code.google.com/ path
FAIL
This change drops support for code.google.com and fixes test. See
http://google-opensource.blogspot.jp/2015/03/farewell-to-google-code.html
for further information.
Fixesgolang/go#14105
Change-Id: I87cb9a3d666c2a1af0f8bf39a66ba0f669c99fd5
Reviewed-on: https://go-review.googlesource.com/18951
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Also: rename setname15.go to setname.go for consistency
Change-Id: I3f7e37ef4ade716ce64674edb4d53a543a1150c5
Reviewed-on: https://go-review.googlesource.com/18772
Reviewed-by: Alan Donovan <adonovan@google.com>
This makes gcimporter15 build against Go 1.5.
Change-Id: I14e7ff80b28d99f996abc19a0a74b08e5e1bbd75
Reviewed-on: https://go-review.googlesource.com/18771
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
Import path is a '/'-separated path. FromDir documentation says
on return, root is the import path corresponding to the root of
the repository. On Windows and other OSes where os.PathSeparator
is not '/', that wasn't true since root would contain characters
other than '/', and therefore it wasn't a valid import path
corresponding to the root of the repository. Fix that by using
filepath.ToSlash.
Add test coverage for root value returned from FromDir, it was
previously not tested.
Additionally, remove a dubious statement from the documentation
"(thus root is a prefix of importPath)". There is no variable
importPath that is being referred to. It's also redundant and
confusing. Without it, the description of root value matches
the documentation of RepoRoot.Root struct field:
// Root is the import path corresponding to the root of the
// repository.
Root string
Fixesgolang/go#7723.
Change-Id: If9f5f55b5751e01a7f88b79d9b039402af3e9312
Reviewed-on: https://go-review.googlesource.com/18461
Reviewed-by: Chris Manghane <cmang@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
...by making the cache non-blocking and duplicate-suppressing.
(The bottleneck was introduced while adding vendoring support.)
This reduces the 95th percentile map shard time for type-checking 120K
packages to 8min from 20min.
Also: move the I/O-limiting counting semaphore and the NoGoError check
from FindPackage to findPackage so that all implementations benefit.
Change-Id: I43527122262cf80475dd3212d78c340e1c71e36c
Reviewed-on: https://go-review.googlesource.com/18580
Reviewed-by: Robert Griesemer <gri@golang.org>
The loader treats GOROOT's "unsafe" package specially,
with no source files and a Package of types.Unsafe.
Tested on Go 1.4.1, 1.5, and ~1.6 (tip).
Fixes issue #13882
Change-Id: I86c4e394665d86a50ec3852d6d702f0e9c5d2276
Reviewed-on: https://go-review.googlesource.com/18457
Reviewed-by: Robert Griesemer <gri@golang.org>
(late response to comment in review of CL 18452)
Change-Id: I1fa80fd1c7fd22cec752c839d20a483e0732337c
Reviewed-on: https://go-review.googlesource.com/18454
Reviewed-by: Alan Donovan <adonovan@google.com>
(See https://go-review.googlesource.com/#/c/18450)
Details:
- delete buildutil.AllowVendor flag.
Instead use unexported 'go16' var in each package that needs it.
- delete buildutil.StripVendor; was never needed.
- remove inapplicable vendoring comments from loader14.go
- importgraph: go1.5: don't bother checking for 1.6 before calling
absolutize (minor simplifiication and deoptimization).
Tested on 1.4.1, 1.5, and ~1.6 (tip).
Change-Id: If692b0df2eb6c120a9c09d7b1ed99f1b4c6b0826
Reviewed-on: https://go-review.googlesource.com/18452
Reviewed-by: Russ Cox <rsc@golang.org>
Because the std go/importer's Lookup functionality is incomplete,
clients have no way to create a Go 1.5 types.Package from an io.Reader
reading from gc export data. This package provides a stopgap until
the standard library is complete.
The go/gcimporter package remains unchanged, and uses only the
golang.org/x/tools/go/types package.
Change-Id: I47a817f4b6a52ddab26c6b01de6e28099301faf5
Reviewed-on: https://go-review.googlesource.com/18382
Reviewed-by: Robert Griesemer <gri@golang.org>
A few files have been forked and tagged "go1.5,!go1.6" to work around
minor API changes between the two types packages:
- constant.Value.String() in oracle/describe.go and its tests;
- constant.ToInt must now be called before constant.Int64Val.
- types.Config{Importer: importer.Default()} in a number of places
- go/types/typeutil/import_test.go uses lowercase names to avoid 'import "C"'.
Files in go/types/typesutil, missing from my previous CL, have been
tagged !go1.5; these files will be deleted in February.
All affected packages were tested using 1.4.1, 1.5, and ~1.6 (tip).
Change-Id: Iec7fd370e1434508149b378438fb37f65b8d2ba8
Reviewed-on: https://go-review.googlesource.com/18207
Reviewed-by: Robert Griesemer <gri@golang.org>
This change will ensure that the tree continues to work with go1.4.1.
All files continue to depend on golang.org/x/tools/go/types, but in a
follow-up change, I will switch the primary files to depend on the
standard go/types package. Another (smaller) set of files will be
forked and tagged, this time !1.6, due to API differences between the
two packages.
All tests pass using 1.4.1, 1.5, and ~1.6 (tip).
Change-Id: Ifd75a6330e120957d646be91693daaba1ce0e8c9
Reviewed-on: https://go-review.googlesource.com/18333
Reviewed-by: Robert Griesemer <gri@golang.org>