Genesis commit

9 files changed, 2353 insertions, 0 deletions

diff --git a/vendor/golang.org/x/text/message/catalog.go b/vendor/golang.org/x/text/message/catalog.go
new file mode 100644
index 0000000..068271d
--- /dev/null
+++ b/vendor/golang.org/x/text/message/catalog.go
@@ -0,0 +1,36 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package message
+
+// TODO: some types in this file will need to be made public at some time.
+// Documentation and method names will reflect this by using the exported name.
+
+import (
+	"golang.org/x/text/language"
+	"golang.org/x/text/message/catalog"
+)
+
+// MatchLanguage reports the matched tag obtained from language.MatchStrings for
+// the Matcher of the DefaultCatalog.
+func MatchLanguage(preferred ...string) language.Tag {
+	c := DefaultCatalog
+	tag, _ := language.MatchStrings(c.Matcher(), preferred...)
+	return tag
+}
+
+// DefaultCatalog is used by SetString.
+var DefaultCatalog catalog.Catalog = defaultCatalog
+
+var defaultCatalog = catalog.NewBuilder()
+
+// SetString calls SetString on the initial default Catalog.
+func SetString(tag language.Tag, key string, msg string) error {
+	return defaultCatalog.SetString(tag, key, msg)
+}
+
+// Set calls Set on the initial default Catalog.
+func Set(tag language.Tag, key string, msg ...catalog.Message) error {
+	return defaultCatalog.Set(tag, key, msg...)
+}
diff --git a/vendor/golang.org/x/text/message/catalog/catalog.go b/vendor/golang.org/x/text/message/catalog/catalog.go
new file mode 100644
index 0000000..96955d0
--- /dev/null
+++ b/vendor/golang.org/x/text/message/catalog/catalog.go
@@ -0,0 +1,365 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package catalog defines collections of translated format strings.
+//
+// This package mostly defines types for populating catalogs with messages. The
+// catmsg package contains further definitions for creating custom message and
+// dictionary types as well as packages that use Catalogs.
+//
+// Package catalog defines various interfaces: Dictionary, Loader, and Message.
+// A Dictionary maintains a set of translations of format strings for a single
+// language. The Loader interface defines a source of dictionaries. A
+// translation of a format string is represented by a Message.
+//
+// # Catalogs
+//
+// A Catalog defines a programmatic interface for setting message translations.
+// It maintains a set of per-language dictionaries with translations for a set
+// of keys. For message translation to function properly, a translation should
+// be defined for each key for each supported language. A dictionary may be
+// underspecified, though, if there is a parent language that already defines
+// the key. For example, a Dictionary for "en-GB" could leave out entries that
+// are identical to those in a dictionary for "en".
+//
+// # Messages
+//
+// A Message is a format string which varies on the value of substitution
+// variables. For instance, to indicate the number of results one could want "no
+// results" if there are none, "1 result" if there is 1, and "%d results" for
+// any other number. Catalog is agnostic to the kind of format strings that are
+// used: for instance, messages can follow either the printf-style substitution
+// from package fmt or use templates.
+//
+// A Message does not substitute arguments in the format string. This job is
+// reserved for packages that render strings, such as message, that use Catalogs
+// to selected string. This separation of concerns allows Catalog to be used to
+// store any kind of formatting strings.
+//
+// # Selecting messages based on linguistic features of substitution arguments
+//
+// Messages may vary based on any linguistic features of the argument values.
+// The most common one is plural form, but others exist.
+//
+// Selection messages are provided in packages that provide support for a
+// specific linguistic feature. The following snippet uses plural.Selectf:
+//
+//	catalog.Set(language.English, "You are %d minute(s) late.",
+//		plural.Selectf(1, "",
+//			plural.One, "You are 1 minute late.",
+//			plural.Other, "You are %d minutes late."))
+//
+// In this example, a message is stored in the Catalog where one of two messages
+// is selected based on the first argument, a number. The first message is
+// selected if the argument is singular (identified by the selector "one") and
+// the second message is selected in all other cases. The selectors are defined
+// by the plural rules defined in CLDR. The selector "other" is special and will
+// always match. Each language always defines one of the linguistic categories
+// to be "other." For English, singular is "one" and plural is "other".
+//
+// Selects can be nested. This allows selecting sentences based on features of
+// multiple arguments or multiple linguistic properties of a single argument.
+//
+// # String interpolation
+//
+// There is often a lot of commonality between the possible variants of a
+// message. For instance, in the example above the word "minute" varies based on
+// the plural catogory of the argument, but the rest of the sentence is
+// identical. Using interpolation the above message can be rewritten as:
+//
+//	catalog.Set(language.English, "You are %d minute(s) late.",
+//		catalog.Var("minutes",
+//			plural.Selectf(1, "", plural.One, "minute", plural.Other, "minutes")),
+//		catalog.String("You are %[1]d ${minutes} late."))
+//
+// Var is defined to return the variable name if the message does not yield a
+// match. This allows us to further simplify this snippet to
+//
+//	catalog.Set(language.English, "You are %d minute(s) late.",
+//		catalog.Var("minutes", plural.Selectf(1, "", plural.One, "minute")),
+//		catalog.String("You are %d ${minutes} late."))
+//
+// Overall this is still only a minor improvement, but things can get a lot more
+// unwieldy if more than one linguistic feature is used to determine a message
+// variant. Consider the following example:
+//
+//	// argument 1: list of hosts, argument 2: list of guests
+//	catalog.Set(language.English, "%[1]v invite(s) %[2]v to their party.",
+//		catalog.Var("their",
+//			plural.Selectf(1, ""
+//				plural.One, gender.Select(1, "female", "her", "other", "his"))),
+//		catalog.Var("invites", plural.Selectf(1, "", plural.One, "invite"))
+//		catalog.String("%[1]v ${invites} %[2]v to ${their} party.")),
+//
+// Without variable substitution, this would have to be written as
+//
+//	// argument 1: list of hosts, argument 2: list of guests
+//	catalog.Set(language.English, "%[1]v invite(s) %[2]v to their party.",
+//		plural.Selectf(1, "",
+//			plural.One, gender.Select(1,
+//				"female", "%[1]v invites %[2]v to her party."
+//				"other", "%[1]v invites %[2]v to his party."),
+//			plural.Other, "%[1]v invites %[2]v to their party."))
+//
+// Not necessarily shorter, but using variables there is less duplication and
+// the messages are more maintenance friendly. Moreover, languages may have up
+// to six plural forms. This makes the use of variables more welcome.
+//
+// Different messages using the same inflections can reuse variables by moving
+// them to macros. Using macros we can rewrite the message as:
+//
+//	// argument 1: list of hosts, argument 2: list of guests
+//	catalog.SetString(language.English, "%[1]v invite(s) %[2]v to their party.",
+//		"%[1]v ${invites(1)} %[2]v to ${their(1)} party.")
+//
+// Where the following macros were defined separately.
+//
+//	catalog.SetMacro(language.English, "invites", plural.Selectf(1, "",
+//		plural.One, "invite"))
+//	catalog.SetMacro(language.English, "their", plural.Selectf(1, "",
+//		plural.One, gender.Select(1, "female", "her", "other", "his"))),
+//
+// Placeholders use parentheses and the arguments to invoke a macro.
+//
+// # Looking up messages
+//
+// Message lookup using Catalogs is typically only done by specialized packages
+// and is not something the user should be concerned with. For instance, to
+// express the tardiness of a user using the related message we defined earlier,
+// the user may use the package message like so:
+//
+//	p := message.NewPrinter(language.English)
+//	p.Printf("You are %d minute(s) late.", 5)
+//
+// Which would print:
+//
+//	You are 5 minutes late.
+//
+// This package is UNDER CONSTRUCTION and its API may change.
+package catalog // import "golang.org/x/text/message/catalog"
+
+// TODO:
+// Some way to freeze a catalog.
+// - Locking on each lockup turns out to be about 50% of the total running time
+//   for some of the benchmarks in the message package.
+// Consider these:
+// - Sequence type to support sequences in user-defined messages.
+// - Garbage collection: Remove dictionaries that can no longer be reached
+//   as other dictionaries have been added that cover all possible keys.
+
+import (
+	"errors"
+	"fmt"
+
+	"golang.org/x/text/internal"
+
+	"golang.org/x/text/internal/catmsg"
+	"golang.org/x/text/language"
+)
+
+// A Catalog allows lookup of translated messages.
+type Catalog interface {
+	// Languages returns all languages for which the Catalog contains variants.
+	Languages() []language.Tag
+
+	// Matcher returns a Matcher for languages from this Catalog.
+	Matcher() language.Matcher
+
+	// A Context is used for evaluating Messages.
+	Context(tag language.Tag, r catmsg.Renderer) *Context
+
+	// This method also makes Catalog a private interface.
+	lookup(tag language.Tag, key string) (data string, ok bool)
+}
+
+// NewFromMap creates a Catalog from the given map. If a Dictionary is
+// underspecified the entry is retrieved from a parent language.
+func NewFromMap(dictionaries map[string]Dictionary, opts ...Option) (Catalog, error) {
+	options := options{}
+	for _, o := range opts {
+		o(&options)
+	}
+	c := &catalog{
+		dicts: map[language.Tag]Dictionary{},
+	}
+	_, hasFallback := dictionaries[options.fallback.String()]
+	if hasFallback {
+		// TODO: Should it be okay to not have a fallback language?
+		// Catalog generators could enforce there is always a fallback.
+		c.langs = append(c.langs, options.fallback)
+	}
+	for lang, dict := range dictionaries {
+		tag, err := language.Parse(lang)
+		if err != nil {
+			return nil, fmt.Errorf("catalog: invalid language tag %q", lang)
+		}
+		if _, ok := c.dicts[tag]; ok {
+			return nil, fmt.Errorf("catalog: duplicate entry for tag %q after normalization", tag)
+		}
+		c.dicts[tag] = dict
+		if !hasFallback || tag != options.fallback {
+			c.langs = append(c.langs, tag)
+		}
+	}
+	if hasFallback {
+		internal.SortTags(c.langs[1:])
+	} else {
+		internal.SortTags(c.langs)
+	}
+	c.matcher = language.NewMatcher(c.langs)
+	return c, nil
+}
+
+// A Dictionary is a source of translations for a single language.
+type Dictionary interface {
+	// Lookup returns a message compiled with catmsg.Compile for the given key.
+	// It returns false for ok if such a message could not be found.
+	Lookup(key string) (data string, ok bool)
+}
+
+type catalog struct {
+	langs   []language.Tag
+	dicts   map[language.Tag]Dictionary
+	macros  store
+	matcher language.Matcher
+}
+
+func (c *catalog) Languages() []language.Tag { return c.langs }
+func (c *catalog) Matcher() language.Matcher { return c.matcher }
+
+func (c *catalog) lookup(tag language.Tag, key string) (data string, ok bool) {
+	for ; ; tag = tag.Parent() {
+		if dict, ok := c.dicts[tag]; ok {
+			if data, ok := dict.Lookup(key); ok {
+				return data, true
+			}
+		}
+		if tag == language.Und {
+			break
+		}
+	}
+	return "", false
+}
+
+// Context returns a Context for formatting messages.
+// Only one Message may be formatted per context at any given time.
+func (c *catalog) Context(tag language.Tag, r catmsg.Renderer) *Context {
+	return &Context{
+		cat: c,
+		tag: tag,
+		dec: catmsg.NewDecoder(tag, r, &dict{&c.macros, tag}),
+	}
+}
+
+// A Builder allows building a Catalog programmatically.
+type Builder struct {
+	options
+	matcher language.Matcher
+
+	index  store
+	macros store
+}
+
+type options struct {
+	fallback language.Tag
+}
+
+// An Option configures Catalog behavior.
+type Option func(*options)
+
+// Fallback specifies the default fallback language. The default is Und.
+func Fallback(tag language.Tag) Option {
+	return func(o *options) { o.fallback = tag }
+}
+
+// TODO:
+// // Catalogs specifies one or more sources for a Catalog.
+// // Lookups are in order.
+// // This can be changed inserting a Catalog used for setting, which implements
+// // Loader, used for setting in the chain.
+// func Catalogs(d ...Loader) Option {
+// 	return nil
+// }
+//
+// func Delims(start, end string) Option {}
+//
+// func Dict(tag language.Tag, d ...Dictionary) Option
+
+// NewBuilder returns an empty mutable Catalog.
+func NewBuilder(opts ...Option) *Builder {
+	c := &Builder{}
+	for _, o := range opts {
+		o(&c.options)
+	}
+	return c
+}
+
+// SetString is shorthand for Set(tag, key, String(msg)).
+func (c *Builder) SetString(tag language.Tag, key string, msg string) error {
+	return c.set(tag, key, &c.index, String(msg))
+}
+
+// Set sets the translation for the given language and key.
+//
+// When evaluation this message, the first Message in the sequence to msgs to
+// evaluate to a string will be the message returned.
+func (c *Builder) Set(tag language.Tag, key string, msg ...Message) error {
+	return c.set(tag, key, &c.index, msg...)
+}
+
+// SetMacro defines a Message that may be substituted in another message.
+// The arguments to a macro Message are passed as arguments in the
+// placeholder the form "${foo(arg1, arg2)}".
+func (c *Builder) SetMacro(tag language.Tag, name string, msg ...Message) error {
+	return c.set(tag, name, &c.macros, msg...)
+}
+
+// ErrNotFound indicates there was no message for the given key.
+var ErrNotFound = errors.New("catalog: message not found")
+
+// String specifies a plain message string. It can be used as fallback if no
+// other strings match or as a simple standalone message.
+//
+// It is an error to pass more than one String in a message sequence.
+func String(name string) Message {
+	return catmsg.String(name)
+}
+
+// Var sets a variable that may be substituted in formatting patterns using
+// named substitution of the form "${name}". The name argument is used as a
+// fallback if the statements do not produce a match. The statement sequence may
+// not contain any Var calls.
+//
+// The name passed to a Var must be unique within message sequence.
+func Var(name string, msg ...Message) Message {
+	return &catmsg.Var{Name: name, Message: firstInSequence(msg)}
+}
+
+// Context returns a Context for formatting messages.
+// Only one Message may be formatted per context at any given time.
+func (b *Builder) Context(tag language.Tag, r catmsg.Renderer) *Context {
+	return &Context{
+		cat: b,
+		tag: tag,
+		dec: catmsg.NewDecoder(tag, r, &dict{&b.macros, tag}),
+	}
+}
+
+// A Context is used for evaluating Messages.
+// Only one Message may be formatted per context at any given time.
+type Context struct {
+	cat Catalog
+	tag language.Tag // TODO: use compact index.
+	dec *catmsg.Decoder
+}
+
+// Execute looks up and executes the message with the given key.
+// It returns ErrNotFound if no message could be found in the index.
+func (c *Context) Execute(key string) error {
+	data, ok := c.cat.lookup(c.tag, key)
+	if !ok {
+		return ErrNotFound
+	}
+	return c.dec.Execute(data)
+}
diff --git a/vendor/golang.org/x/text/message/catalog/dict.go b/vendor/golang.org/x/text/message/catalog/dict.go
new file mode 100644
index 0000000..a0eb818
--- /dev/null
+++ b/vendor/golang.org/x/text/message/catalog/dict.go
@@ -0,0 +1,129 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package catalog
+
+import (
+	"sync"
+
+	"golang.org/x/text/internal"
+	"golang.org/x/text/internal/catmsg"
+	"golang.org/x/text/language"
+)
+
+// TODO:
+// Dictionary returns a Dictionary that returns the first Message, using the
+// given language tag, that matches:
+//   1. the last one registered by one of the Set methods
+//   2. returned by one of the Loaders
+//   3. repeat from 1. using the parent language
+// This approach allows messages to be underspecified.
+// func (c *Catalog) Dictionary(tag language.Tag) (Dictionary, error) {
+// 	// TODO: verify dictionary exists.
+// 	return &dict{&c.index, tag}, nil
+// }
+
+type dict struct {
+	s   *store
+	tag language.Tag // TODO: make compact tag.
+}
+
+func (d *dict) Lookup(key string) (data string, ok bool) {
+	return d.s.lookup(d.tag, key)
+}
+
+func (b *Builder) lookup(tag language.Tag, key string) (data string, ok bool) {
+	return b.index.lookup(tag, key)
+}
+
+func (c *Builder) set(tag language.Tag, key string, s *store, msg ...Message) error {
+	data, err := catmsg.Compile(tag, &dict{&c.macros, tag}, firstInSequence(msg))
+
+	s.mutex.Lock()
+	defer s.mutex.Unlock()
+
+	m := s.index[tag]
+	if m == nil {
+		m = msgMap{}
+		if s.index == nil {
+			s.index = map[language.Tag]msgMap{}
+		}
+		c.matcher = nil
+		s.index[tag] = m
+	}
+
+	m[key] = data
+	return err
+}
+
+func (c *Builder) Matcher() language.Matcher {
+	c.index.mutex.RLock()
+	m := c.matcher
+	c.index.mutex.RUnlock()
+	if m != nil {
+		return m
+	}
+
+	c.index.mutex.Lock()
+	if c.matcher == nil {
+		c.matcher = language.NewMatcher(c.unlockedLanguages())
+	}
+	m = c.matcher
+	c.index.mutex.Unlock()
+	return m
+}
+
+type store struct {
+	mutex sync.RWMutex
+	index map[language.Tag]msgMap
+}
+
+type msgMap map[string]string
+
+func (s *store) lookup(tag language.Tag, key string) (data string, ok bool) {
+	s.mutex.RLock()
+	defer s.mutex.RUnlock()
+
+	for ; ; tag = tag.Parent() {
+		if msgs, ok := s.index[tag]; ok {
+			if msg, ok := msgs[key]; ok {
+				return msg, true
+			}
+		}
+		if tag == language.Und {
+			break
+		}
+	}
+	return "", false
+}
+
+// Languages returns all languages for which the Catalog contains variants.
+func (b *Builder) Languages() []language.Tag {
+	s := &b.index
+	s.mutex.RLock()
+	defer s.mutex.RUnlock()
+
+	return b.unlockedLanguages()
+}
+
+func (b *Builder) unlockedLanguages() []language.Tag {
+	s := &b.index
+	if len(s.index) == 0 {
+		return nil
+	}
+	tags := make([]language.Tag, 0, len(s.index))
+	_, hasFallback := s.index[b.options.fallback]
+	offset := 0
+	if hasFallback {
+		tags = append(tags, b.options.fallback)
+		offset = 1
+	}
+	for t := range s.index {
+		if t != b.options.fallback {
+			tags = append(tags, t)
+		}
+	}
+	internal.SortTags(tags[offset:])
+	return tags
+}
diff --git a/vendor/golang.org/x/text/message/catalog/go19.go b/vendor/golang.org/x/text/message/catalog/go19.go
new file mode 100644
index 0000000..291a4df
--- /dev/null
+++ b/vendor/golang.org/x/text/message/catalog/go19.go
@@ -0,0 +1,15 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build go1.9
+
+package catalog
+
+import "golang.org/x/text/internal/catmsg"
+
+// A Message holds a collection of translations for the same phrase that may
+// vary based on the values of substitution arguments.
+type Message = catmsg.Message
+
+type firstInSequence = catmsg.FirstOf
diff --git a/vendor/golang.org/x/text/message/catalog/gopre19.go b/vendor/golang.org/x/text/message/catalog/gopre19.go
new file mode 100644
index 0000000..da44ebb
--- /dev/null
+++ b/vendor/golang.org/x/text/message/catalog/gopre19.go
@@ -0,0 +1,23 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !go1.9
+
+package catalog
+
+import "golang.org/x/text/internal/catmsg"
+
+// A Message holds a collection of translations for the same phrase that may
+// vary based on the values of substitution arguments.
+type Message interface {
+	catmsg.Message
+}
+
+func firstInSequence(m []Message) catmsg.Message {
+	a := []catmsg.Message{}
+	for _, m := range m {
+		a = append(a, m)
+	}
+	return catmsg.FirstOf(a)
+}
diff --git a/vendor/golang.org/x/text/message/doc.go b/vendor/golang.org/x/text/message/doc.go
new file mode 100644
index 0000000..4bf7bdc
--- /dev/null
+++ b/vendor/golang.org/x/text/message/doc.go
@@ -0,0 +1,99 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package message implements formatted I/O for localized strings with functions
+// analogous to the fmt's print functions. It is a drop-in replacement for fmt.
+//
+// # Localized Formatting
+//
+// A format string can be localized by replacing any of the print functions of
+// fmt with an equivalent call to a Printer.
+//
+//	p := message.NewPrinter(message.MatchLanguage("en"))
+//	p.Println(123456.78) // Prints 123,456.78
+//
+//	p.Printf("%d ducks in a row", 4331) // Prints 4,331 ducks in a row
+//
+//	p := message.NewPrinter(message.MatchLanguage("nl"))
+//	p.Printf("Hoogte: %.1f meter", 1244.9) // Prints Hoogte: 1,244.9 meter
+//
+//	p := message.NewPrinter(message.MatchLanguage("bn"))
+//	p.Println(123456.78) // Prints ১,২৩,৪৫৬.৭৮
+//
+// Printer currently supports numbers and specialized types for which packages
+// exist in x/text. Other builtin types such as time.Time and slices are
+// planned.
+//
+// Format strings largely have the same meaning as with fmt with the following
+// notable exceptions:
+//   - flag # always resorts to fmt for printing
+//   - verb 'f', 'e', 'g', 'd' use localized formatting unless the '#' flag is
+//     specified.
+//   - verb 'm' inserts a translation of a string argument.
+//
+// See package fmt for more options.
+//
+// # Translation
+//
+// The format strings that are passed to Printf, Sprintf, Fprintf, or Errorf
+// are used as keys to look up translations for the specified languages.
+// More on how these need to be specified below.
+//
+// One can use arbitrary keys to distinguish between otherwise ambiguous
+// strings:
+//
+//	p := message.NewPrinter(language.English)
+//	p.Printf("archive(noun)")  // Prints "archive"
+//	p.Printf("archive(verb)")  // Prints "archive"
+//
+//	p := message.NewPrinter(language.German)
+//	p.Printf("archive(noun)")  // Prints "Archiv"
+//	p.Printf("archive(verb)")  // Prints "archivieren"
+//
+// To retain the fallback functionality, use Key:
+//
+//	p.Printf(message.Key("archive(noun)", "archive"))
+//	p.Printf(message.Key("archive(verb)", "archive"))
+//
+// # Translation Pipeline
+//
+// Format strings that contain text need to be translated to support different
+// locales. The first step is to extract strings that need to be translated.
+//
+// 1. Install gotext
+//
+//	go get -u golang.org/x/text/cmd/gotext
+//	gotext -help
+//
+// 2. Mark strings in your source to be translated by using message.Printer,
+// instead of the functions of the fmt package.
+//
+// 3. Extract the strings from your source
+//
+//	gotext extract
+//
+// The output will be written to the textdata directory.
+//
+// 4. Send the files for translation
+//
+// It is planned to support multiple formats, but for now one will have to
+// rewrite the JSON output to the desired format.
+//
+// 5. Inject translations into program
+//
+// 6. Repeat from 2
+//
+// Right now this has to be done programmatically with calls to Set or
+// SetString. These functions as well as the methods defined in
+// see also package golang.org/x/text/message/catalog can be used to implement
+// either dynamic or static loading of messages.
+//
+// # Plural and Gender Forms
+//
+// Translated messages can vary based on the plural and gender forms of
+// substitution values. In general, it is up to the translators to provide
+// alternative translations for such forms. See the packages in
+// golang.org/x/text/feature and golang.org/x/text/message/catalog for more
+// information.
+package message
diff --git a/vendor/golang.org/x/text/message/format.go b/vendor/golang.org/x/text/message/format.go
new file mode 100644
index 0000000..a47d17d
--- /dev/null
+++ b/vendor/golang.org/x/text/message/format.go
@@ -0,0 +1,510 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package message
+
+import (
+	"bytes"
+	"strconv"
+	"unicode/utf8"
+
+	"golang.org/x/text/internal/format"
+)
+
+const (
+	ldigits = "0123456789abcdefx"
+	udigits = "0123456789ABCDEFX"
+)
+
+const (
+	signed   = true
+	unsigned = false
+)
+
+// A formatInfo is the raw formatter used by Printf etc.
+// It prints into a buffer that must be set up separately.
+type formatInfo struct {
+	buf *bytes.Buffer
+
+	format.Parser
+
+	// intbuf is large enough to store %b of an int64 with a sign and
+	// avoids padding at the end of the struct on 32 bit architectures.
+	intbuf [68]byte
+}
+
+func (f *formatInfo) init(buf *bytes.Buffer) {
+	f.ClearFlags()
+	f.buf = buf
+}
+
+// writePadding generates n bytes of padding.
+func (f *formatInfo) writePadding(n int) {
+	if n <= 0 { // No padding bytes needed.
+		return
+	}
+	f.buf.Grow(n)
+	// Decide which byte the padding should be filled with.
+	padByte := byte(' ')
+	if f.Zero {
+		padByte = byte('0')
+	}
+	// Fill padding with padByte.
+	for i := 0; i < n; i++ {
+		f.buf.WriteByte(padByte) // TODO: make more efficient.
+	}
+}
+
+// pad appends b to f.buf, padded on left (!f.minus) or right (f.minus).
+func (f *formatInfo) pad(b []byte) {
+	if !f.WidthPresent || f.Width == 0 {
+		f.buf.Write(b)
+		return
+	}
+	width := f.Width - utf8.RuneCount(b)
+	if !f.Minus {
+		// left padding
+		f.writePadding(width)
+		f.buf.Write(b)
+	} else {
+		// right padding
+		f.buf.Write(b)
+		f.writePadding(width)
+	}
+}
+
+// padString appends s to f.buf, padded on left (!f.minus) or right (f.minus).
+func (f *formatInfo) padString(s string) {
+	if !f.WidthPresent || f.Width == 0 {
+		f.buf.WriteString(s)
+		return
+	}
+	width := f.Width - utf8.RuneCountInString(s)
+	if !f.Minus {
+		// left padding
+		f.writePadding(width)
+		f.buf.WriteString(s)
+	} else {
+		// right padding
+		f.buf.WriteString(s)
+		f.writePadding(width)
+	}
+}
+
+// fmt_boolean formats a boolean.
+func (f *formatInfo) fmt_boolean(v bool) {
+	if v {
+		f.padString("true")
+	} else {
+		f.padString("false")
+	}
+}
+
+// fmt_unicode formats a uint64 as "U+0078" or with f.sharp set as "U+0078 'x'".
+func (f *formatInfo) fmt_unicode(u uint64) {
+	buf := f.intbuf[0:]
+
+	// With default precision set the maximum needed buf length is 18
+	// for formatting -1 with %#U ("U+FFFFFFFFFFFFFFFF") which fits
+	// into the already allocated intbuf with a capacity of 68 bytes.
+	prec := 4
+	if f.PrecPresent && f.Prec > 4 {
+		prec = f.Prec
+		// Compute space needed for "U+" , number, " '", character, "'".
+		width := 2 + prec + 2 + utf8.UTFMax + 1
+		if width > len(buf) {
+			buf = make([]byte, width)
+		}
+	}
+
+	// Format into buf, ending at buf[i]. Formatting numbers is easier right-to-left.
+	i := len(buf)
+
+	// For %#U we want to add a space and a quoted character at the end of the buffer.
+	if f.Sharp && u <= utf8.MaxRune && strconv.IsPrint(rune(u)) {
+		i--
+		buf[i] = '\''
+		i -= utf8.RuneLen(rune(u))
+		utf8.EncodeRune(buf[i:], rune(u))
+		i--
+		buf[i] = '\''
+		i--
+		buf[i] = ' '
+	}
+	// Format the Unicode code point u as a hexadecimal number.
+	for u >= 16 {
+		i--
+		buf[i] = udigits[u&0xF]
+		prec--
+		u >>= 4
+	}
+	i--
+	buf[i] = udigits[u]
+	prec--
+	// Add zeros in front of the number until requested precision is reached.
+	for prec > 0 {
+		i--
+		buf[i] = '0'
+		prec--
+	}
+	// Add a leading "U+".
+	i--
+	buf[i] = '+'
+	i--
+	buf[i] = 'U'
+
+	oldZero := f.Zero
+	f.Zero = false
+	f.pad(buf[i:])
+	f.Zero = oldZero
+}
+
+// fmt_integer formats signed and unsigned integers.
+func (f *formatInfo) fmt_integer(u uint64, base int, isSigned bool, digits string) {
+	negative := isSigned && int64(u) < 0
+	if negative {
+		u = -u
+	}
+
+	buf := f.intbuf[0:]
+	// The already allocated f.intbuf with a capacity of 68 bytes
+	// is large enough for integer formatting when no precision or width is set.
+	if f.WidthPresent || f.PrecPresent {
+		// Account 3 extra bytes for possible addition of a sign and "0x".
+		width := 3 + f.Width + f.Prec // wid and prec are always positive.
+		if width > len(buf) {
+			// We're going to need a bigger boat.
+			buf = make([]byte, width)
+		}
+	}
+
+	// Two ways to ask for extra leading zero digits: %.3d or %03d.
+	// If both are specified the f.zero flag is ignored and
+	// padding with spaces is used instead.
+	prec := 0
+	if f.PrecPresent {
+		prec = f.Prec
+		// Precision of 0 and value of 0 means "print nothing" but padding.
+		if prec == 0 && u == 0 {
+			oldZero := f.Zero
+			f.Zero = false
+			f.writePadding(f.Width)
+			f.Zero = oldZero
+			return
+		}
+	} else if f.Zero && f.WidthPresent {
+		prec = f.Width
+		if negative || f.Plus || f.Space {
+			prec-- // leave room for sign
+		}
+	}
+
+	// Because printing is easier right-to-left: format u into buf, ending at buf[i].
+	// We could make things marginally faster by splitting the 32-bit case out
+	// into a separate block but it's not worth the duplication, so u has 64 bits.
+	i := len(buf)
+	// Use constants for the division and modulo for more efficient code.
+	// Switch cases ordered by popularity.
+	switch base {
+	case 10:
+		for u >= 10 {
+			i--
+			next := u / 10
+			buf[i] = byte('0' + u - next*10)
+			u = next
+		}
+	case 16:
+		for u >= 16 {
+			i--
+			buf[i] = digits[u&0xF]
+			u >>= 4
+		}
+	case 8:
+		for u >= 8 {
+			i--
+			buf[i] = byte('0' + u&7)
+			u >>= 3
+		}
+	case 2:
+		for u >= 2 {
+			i--
+			buf[i] = byte('0' + u&1)
+			u >>= 1
+		}
+	default:
+		panic("fmt: unknown base; can't happen")
+	}
+	i--
+	buf[i] = digits[u]
+	for i > 0 && prec > len(buf)-i {
+		i--
+		buf[i] = '0'
+	}
+
+	// Various prefixes: 0x, -, etc.
+	if f.Sharp {
+		switch base {
+		case 8:
+			if buf[i] != '0' {
+				i--
+				buf[i] = '0'
+			}
+		case 16:
+			// Add a leading 0x or 0X.
+			i--
+			buf[i] = digits[16]
+			i--
+			buf[i] = '0'
+		}
+	}
+
+	if negative {
+		i--
+		buf[i] = '-'
+	} else if f.Plus {
+		i--
+		buf[i] = '+'
+	} else if f.Space {
+		i--
+		buf[i] = ' '
+	}
+
+	// Left padding with zeros has already been handled like precision earlier
+	// or the f.zero flag is ignored due to an explicitly set precision.
+	oldZero := f.Zero
+	f.Zero = false
+	f.pad(buf[i:])
+	f.Zero = oldZero
+}
+
+// truncate truncates the string to the specified precision, if present.
+func (f *formatInfo) truncate(s string) string {
+	if f.PrecPresent {
+		n := f.Prec
+		for i := range s {
+			n--
+			if n < 0 {
+				return s[:i]
+			}
+		}
+	}
+	return s
+}
+
+// fmt_s formats a string.
+func (f *formatInfo) fmt_s(s string) {
+	s = f.truncate(s)
+	f.padString(s)
+}
+
+// fmt_sbx formats a string or byte slice as a hexadecimal encoding of its bytes.
+func (f *formatInfo) fmt_sbx(s string, b []byte, digits string) {
+	length := len(b)
+	if b == nil {
+		// No byte slice present. Assume string s should be encoded.
+		length = len(s)
+	}
+	// Set length to not process more bytes than the precision demands.
+	if f.PrecPresent && f.Prec < length {
+		length = f.Prec
+	}
+	// Compute width of the encoding taking into account the f.sharp and f.space flag.
+	width := 2 * length
+	if width > 0 {
+		if f.Space {
+			// Each element encoded by two hexadecimals will get a leading 0x or 0X.
+			if f.Sharp {
+				width *= 2
+			}
+			// Elements will be separated by a space.
+			width += length - 1
+		} else if f.Sharp {
+			// Only a leading 0x or 0X will be added for the whole string.
+			width += 2
+		}
+	} else { // The byte slice or string that should be encoded is empty.
+		if f.WidthPresent {
+			f.writePadding(f.Width)
+		}
+		return
+	}
+	// Handle padding to the left.
+	if f.WidthPresent && f.Width > width && !f.Minus {
+		f.writePadding(f.Width - width)
+	}
+	// Write the encoding directly into the output buffer.
+	buf := f.buf
+	if f.Sharp {
+		// Add leading 0x or 0X.
+		buf.WriteByte('0')
+		buf.WriteByte(digits[16])
+	}
+	var c byte
+	for i := 0; i < length; i++ {
+		if f.Space && i > 0 {
+			// Separate elements with a space.
+			buf.WriteByte(' ')
+			if f.Sharp {
+				// Add leading 0x or 0X for each element.
+				buf.WriteByte('0')
+				buf.WriteByte(digits[16])
+			}
+		}
+		if b != nil {
+			c = b[i] // Take a byte from the input byte slice.
+		} else {
+			c = s[i] // Take a byte from the input string.
+		}
+		// Encode each byte as two hexadecimal digits.
+		buf.WriteByte(digits[c>>4])
+		buf.WriteByte(digits[c&0xF])
+	}
+	// Handle padding to the right.
+	if f.WidthPresent && f.Width > width && f.Minus {
+		f.writePadding(f.Width - width)
+	}
+}
+
+// fmt_sx formats a string as a hexadecimal encoding of its bytes.
+func (f *formatInfo) fmt_sx(s, digits string) {
+	f.fmt_sbx(s, nil, digits)
+}
+
+// fmt_bx formats a byte slice as a hexadecimal encoding of its bytes.
+func (f *formatInfo) fmt_bx(b []byte, digits string) {
+	f.fmt_sbx("", b, digits)
+}
+
+// fmt_q formats a string as a double-quoted, escaped Go string constant.
+// If f.sharp is set a raw (backquoted) string may be returned instead
+// if the string does not contain any control characters other than tab.
+func (f *formatInfo) fmt_q(s string) {
+	s = f.truncate(s)
+	if f.Sharp && strconv.CanBackquote(s) {
+		f.padString("`" + s + "`")
+		return
+	}
+	buf := f.intbuf[:0]
+	if f.Plus {
+		f.pad(strconv.AppendQuoteToASCII(buf, s))
+	} else {
+		f.pad(strconv.AppendQuote(buf, s))
+	}
+}
+
+// fmt_c formats an integer as a Unicode character.
+// If the character is not valid Unicode, it will print '\ufffd'.
+func (f *formatInfo) fmt_c(c uint64) {
+	r := rune(c)
+	if c > utf8.MaxRune {
+		r = utf8.RuneError
+	}
+	buf := f.intbuf[:0]
+	w := utf8.EncodeRune(buf[:utf8.UTFMax], r)
+	f.pad(buf[:w])
+}
+
+// fmt_qc formats an integer as a single-quoted, escaped Go character constant.
+// If the character is not valid Unicode, it will print '\ufffd'.
+func (f *formatInfo) fmt_qc(c uint64) {
+	r := rune(c)
+	if c > utf8.MaxRune {
+		r = utf8.RuneError
+	}
+	buf := f.intbuf[:0]
+	if f.Plus {
+		f.pad(strconv.AppendQuoteRuneToASCII(buf, r))
+	} else {
+		f.pad(strconv.AppendQuoteRune(buf, r))
+	}
+}
+
+// fmt_float formats a float64. It assumes that verb is a valid format specifier
+// for strconv.AppendFloat and therefore fits into a byte.
+func (f *formatInfo) fmt_float(v float64, size int, verb rune, prec int) {
+	// Explicit precision in format specifier overrules default precision.
+	if f.PrecPresent {
+		prec = f.Prec
+	}
+	// Format number, reserving space for leading + sign if needed.
+	num := strconv.AppendFloat(f.intbuf[:1], v, byte(verb), prec, size)
+	if num[1] == '-' || num[1] == '+' {
+		num = num[1:]
+	} else {
+		num[0] = '+'
+	}
+	// f.space means to add a leading space instead of a "+" sign unless
+	// the sign is explicitly asked for by f.plus.
+	if f.Space && num[0] == '+' && !f.Plus {
+		num[0] = ' '
+	}
+	// Special handling for infinities and NaN,
+	// which don't look like a number so shouldn't be padded with zeros.
+	if num[1] == 'I' || num[1] == 'N' {
+		oldZero := f.Zero
+		f.Zero = false
+		// Remove sign before NaN if not asked for.
+		if num[1] == 'N' && !f.Space && !f.Plus {
+			num = num[1:]
+		}
+		f.pad(num)
+		f.Zero = oldZero
+		return
+	}
+	// The sharp flag forces printing a decimal point for non-binary formats
+	// and retains trailing zeros, which we may need to restore.
+	if f.Sharp && verb != 'b' {
+		digits := 0
+		switch verb {
+		case 'v', 'g', 'G':
+			digits = prec
+			// If no precision is set explicitly use a precision of 6.
+			if digits == -1 {
+				digits = 6
+			}
+		}
+
+		// Buffer pre-allocated with enough room for
+		// exponent notations of the form "e+123".
+		var tailBuf [5]byte
+		tail := tailBuf[:0]
+
+		hasDecimalPoint := false
+		// Starting from i = 1 to skip sign at num[0].
+		for i := 1; i < len(num); i++ {
+			switch num[i] {
+			case '.':
+				hasDecimalPoint = true
+			case 'e', 'E':
+				tail = append(tail, num[i:]...)
+				num = num[:i]
+			default:
+				digits--
+			}
+		}
+		if !hasDecimalPoint {
+			num = append(num, '.')
+		}
+		for digits > 0 {
+			num = append(num, '0')
+			digits--
+		}
+		num = append(num, tail...)
+	}
+	// We want a sign if asked for and if the sign is not positive.
+	if f.Plus || num[0] != '+' {
+		// If we're zero padding to the left we want the sign before the leading zeros.
+		// Achieve this by writing the sign out and then padding the unsigned number.
+		if f.Zero && f.WidthPresent && f.Width > len(num) {
+			f.buf.WriteByte(num[0])
+			f.writePadding(f.Width - len(num))
+			f.buf.Write(num[1:])
+			return
+		}
+		f.pad(num)
+		return
+	}
+	// No sign to show and the number is positive; just print the unsigned number.
+	f.pad(num[1:])
+}
diff --git a/vendor/golang.org/x/text/message/message.go b/vendor/golang.org/x/text/message/message.go
new file mode 100644
index 0000000..91a9726
--- /dev/null
+++ b/vendor/golang.org/x/text/message/message.go
@@ -0,0 +1,192 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package message // import "golang.org/x/text/message"
+
+import (
+	"io"
+	"os"
+
+	// Include features to facilitate generated catalogs.
+	_ "golang.org/x/text/feature/plural"
+
+	"golang.org/x/text/internal/number"
+	"golang.org/x/text/language"
+	"golang.org/x/text/message/catalog"
+)
+
+// A Printer implements language-specific formatted I/O analogous to the fmt
+// package.
+type Printer struct {
+	// the language
+	tag language.Tag
+
+	toDecimal    number.Formatter
+	toScientific number.Formatter
+
+	cat catalog.Catalog
+}
+
+type options struct {
+	cat catalog.Catalog
+	// TODO:
+	// - allow %s to print integers in written form (tables are likely too large
+	//   to enable this by default).
+	// - list behavior
+	//
+}
+
+// An Option defines an option of a Printer.
+type Option func(o *options)
+
+// Catalog defines the catalog to be used.
+func Catalog(c catalog.Catalog) Option {
+	return func(o *options) { o.cat = c }
+}
+
+// NewPrinter returns a Printer that formats messages tailored to language t.
+func NewPrinter(t language.Tag, opts ...Option) *Printer {
+	options := &options{
+		cat: DefaultCatalog,
+	}
+	for _, o := range opts {
+		o(options)
+	}
+	p := &Printer{
+		tag: t,
+		cat: options.cat,
+	}
+	p.toDecimal.InitDecimal(t)
+	p.toScientific.InitScientific(t)
+	return p
+}
+
+// Sprint is like fmt.Sprint, but using language-specific formatting.
+func (p *Printer) Sprint(a ...interface{}) string {
+	pp := newPrinter(p)
+	pp.doPrint(a)
+	s := pp.String()
+	pp.free()
+	return s
+}
+
+// Fprint is like fmt.Fprint, but using language-specific formatting.
+func (p *Printer) Fprint(w io.Writer, a ...interface{}) (n int, err error) {
+	pp := newPrinter(p)
+	pp.doPrint(a)
+	n64, err := io.Copy(w, &pp.Buffer)
+	pp.free()
+	return int(n64), err
+}
+
+// Print is like fmt.Print, but using language-specific formatting.
+func (p *Printer) Print(a ...interface{}) (n int, err error) {
+	return p.Fprint(os.Stdout, a...)
+}
+
+// Sprintln is like fmt.Sprintln, but using language-specific formatting.
+func (p *Printer) Sprintln(a ...interface{}) string {
+	pp := newPrinter(p)
+	pp.doPrintln(a)
+	s := pp.String()
+	pp.free()
+	return s
+}
+
+// Fprintln is like fmt.Fprintln, but using language-specific formatting.
+func (p *Printer) Fprintln(w io.Writer, a ...interface{}) (n int, err error) {
+	pp := newPrinter(p)
+	pp.doPrintln(a)
+	n64, err := io.Copy(w, &pp.Buffer)
+	pp.free()
+	return int(n64), err
+}
+
+// Println is like fmt.Println, but using language-specific formatting.
+func (p *Printer) Println(a ...interface{}) (n int, err error) {
+	return p.Fprintln(os.Stdout, a...)
+}
+
+// Sprintf is like fmt.Sprintf, but using language-specific formatting.
+func (p *Printer) Sprintf(key Reference, a ...interface{}) string {
+	pp := newPrinter(p)
+	lookupAndFormat(pp, key, a)
+	s := pp.String()
+	pp.free()
+	return s
+}
+
+// Fprintf is like fmt.Fprintf, but using language-specific formatting.
+func (p *Printer) Fprintf(w io.Writer, key Reference, a ...interface{}) (n int, err error) {
+	pp := newPrinter(p)
+	lookupAndFormat(pp, key, a)
+	n, err = w.Write(pp.Bytes())
+	pp.free()
+	return n, err
+
+}
+
+// Printf is like fmt.Printf, but using language-specific formatting.
+func (p *Printer) Printf(key Reference, a ...interface{}) (n int, err error) {
+	pp := newPrinter(p)
+	lookupAndFormat(pp, key, a)
+	n, err = os.Stdout.Write(pp.Bytes())
+	pp.free()
+	return n, err
+}
+
+func lookupAndFormat(p *printer, r Reference, a []interface{}) {
+	p.fmt.Reset(a)
+	switch v := r.(type) {
+	case string:
+		if p.catContext.Execute(v) == catalog.ErrNotFound {
+			p.Render(v)
+			return
+		}
+	case key:
+		if p.catContext.Execute(v.id) == catalog.ErrNotFound &&
+			p.catContext.Execute(v.fallback) == catalog.ErrNotFound {
+			p.Render(v.fallback)
+			return
+		}
+	default:
+		panic("key argument is not a Reference")
+	}
+}
+
+type rawPrinter struct {
+	p *printer
+}
+
+func (p rawPrinter) Render(msg string)     { p.p.WriteString(msg) }
+func (p rawPrinter) Arg(i int) interface{} { return nil }
+
+// Arg implements catmsg.Renderer.
+func (p *printer) Arg(i int) interface{} { // TODO, also return "ok" bool
+	i--
+	if uint(i) < uint(len(p.fmt.Args)) {
+		return p.fmt.Args[i]
+	}
+	return nil
+}
+
+// Render implements catmsg.Renderer.
+func (p *printer) Render(msg string) {
+	p.doPrintf(msg)
+}
+
+// A Reference is a string or a message reference.
+type Reference interface {
+	// TODO: also allow []string
+}
+
+// Key creates a message Reference for a message where the given id is used for
+// message lookup and the fallback is returned when no matches are found.
+func Key(id string, fallback string) Reference {
+	return key{id, fallback}
+}
+
+type key struct {
+	id, fallback string
+}
diff --git a/vendor/golang.org/x/text/message/print.go b/vendor/golang.org/x/text/message/print.go
new file mode 100644
index 0000000..da304cc
--- /dev/null
+++ b/vendor/golang.org/x/text/message/print.go
@@ -0,0 +1,984 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package message
+
+import (
+	"bytes"
+	"fmt" // TODO: consider copying interfaces from package fmt to avoid dependency.
+	"math"
+	"reflect"
+	"sync"
+	"unicode/utf8"
+
+	"golang.org/x/text/internal/format"
+	"golang.org/x/text/internal/number"
+	"golang.org/x/text/language"
+	"golang.org/x/text/message/catalog"
+)
+
+// Strings for use with buffer.WriteString.
+// This is less overhead than using buffer.Write with byte arrays.
+const (
+	commaSpaceString  = ", "
+	nilAngleString    = "<nil>"
+	nilParenString    = "(nil)"
+	nilString         = "nil"
+	mapString         = "map["
+	percentBangString = "%!"
+	missingString     = "(MISSING)"
+	badIndexString    = "(BADINDEX)"
+	panicString       = "(PANIC="
+	extraString       = "%!(EXTRA "
+	badWidthString    = "%!(BADWIDTH)"
+	badPrecString     = "%!(BADPREC)"
+	noVerbString      = "%!(NOVERB)"
+
+	invReflectString = "<invalid reflect.Value>"
+)
+
+var printerPool = sync.Pool{
+	New: func() interface{} { return new(printer) },
+}
+
+// newPrinter allocates a new printer struct or grabs a cached one.
+func newPrinter(pp *Printer) *printer {
+	p := printerPool.Get().(*printer)
+	p.Printer = *pp
+	// TODO: cache most of the following call.
+	p.catContext = pp.cat.Context(pp.tag, p)
+
+	p.panicking = false
+	p.erroring = false
+	p.fmt.init(&p.Buffer)
+	return p
+}
+
+// free saves used printer structs in printerFree; avoids an allocation per invocation.
+func (p *printer) free() {
+	p.Buffer.Reset()
+	p.arg = nil
+	p.value = reflect.Value{}
+	printerPool.Put(p)
+}
+
+// printer is used to store a printer's state.
+// It implements "golang.org/x/text/internal/format".State.
+type printer struct {
+	Printer
+
+	// the context for looking up message translations
+	catContext *catalog.Context
+
+	// buffer for accumulating output.
+	bytes.Buffer
+
+	// arg holds the current item, as an interface{}.
+	arg interface{}
+	// value is used instead of arg for reflect values.
+	value reflect.Value
+
+	// fmt is used to format basic items such as integers or strings.
+	fmt formatInfo
+
+	// panicking is set by catchPanic to avoid infinite panic, recover, panic, ... recursion.
+	panicking bool
+	// erroring is set when printing an error string to guard against calling handleMethods.
+	erroring bool
+}
+
+// Language implements "golang.org/x/text/internal/format".State.
+func (p *printer) Language() language.Tag { return p.tag }
+
+func (p *printer) Width() (wid int, ok bool) { return p.fmt.Width, p.fmt.WidthPresent }
+
+func (p *printer) Precision() (prec int, ok bool) { return p.fmt.Prec, p.fmt.PrecPresent }
+
+func (p *printer) Flag(b int) bool {
+	switch b {
+	case '-':
+		return p.fmt.Minus
+	case '+':
+		return p.fmt.Plus || p.fmt.PlusV
+	case '#':
+		return p.fmt.Sharp || p.fmt.SharpV
+	case ' ':
+		return p.fmt.Space
+	case '0':
+		return p.fmt.Zero
+	}
+	return false
+}
+
+// getField gets the i'th field of the struct value.
+// If the field is itself is an interface, return a value for
+// the thing inside the interface, not the interface itself.
+func getField(v reflect.Value, i int) reflect.Value {
+	val := v.Field(i)
+	if val.Kind() == reflect.Interface && !val.IsNil() {
+		val = val.Elem()
+	}
+	return val
+}
+
+func (p *printer) unknownType(v reflect.Value) {
+	if !v.IsValid() {
+		p.WriteString(nilAngleString)
+		return
+	}
+	p.WriteByte('?')
+	p.WriteString(v.Type().String())
+	p.WriteByte('?')
+}
+
+func (p *printer) badVerb(verb rune) {
+	p.erroring = true
+	p.WriteString(percentBangString)
+	p.WriteRune(verb)
+	p.WriteByte('(')
+	switch {
+	case p.arg != nil:
+		p.WriteString(reflect.TypeOf(p.arg).String())
+		p.WriteByte('=')
+		p.printArg(p.arg, 'v')
+	case p.value.IsValid():
+		p.WriteString(p.value.Type().String())
+		p.WriteByte('=')
+		p.printValue(p.value, 'v', 0)
+	default:
+		p.WriteString(nilAngleString)
+	}
+	p.WriteByte(')')
+	p.erroring = false
+}
+
+func (p *printer) fmtBool(v bool, verb rune) {
+	switch verb {
+	case 't', 'v':
+		p.fmt.fmt_boolean(v)
+	default:
+		p.badVerb(verb)
+	}
+}
+
+// fmt0x64 formats a uint64 in hexadecimal and prefixes it with 0x or
+// not, as requested, by temporarily setting the sharp flag.
+func (p *printer) fmt0x64(v uint64, leading0x bool) {
+	sharp := p.fmt.Sharp
+	p.fmt.Sharp = leading0x
+	p.fmt.fmt_integer(v, 16, unsigned, ldigits)
+	p.fmt.Sharp = sharp
+}
+
+// fmtInteger formats a signed or unsigned integer.
+func (p *printer) fmtInteger(v uint64, isSigned bool, verb rune) {
+	switch verb {
+	case 'v':
+		if p.fmt.SharpV && !isSigned {
+			p.fmt0x64(v, true)
+			return
+		}
+		fallthrough
+	case 'd':
+		if p.fmt.Sharp || p.fmt.SharpV {
+			p.fmt.fmt_integer(v, 10, isSigned, ldigits)
+		} else {
+			p.fmtDecimalInt(v, isSigned)
+		}
+	case 'b':
+		p.fmt.fmt_integer(v, 2, isSigned, ldigits)
+	case 'o':
+		p.fmt.fmt_integer(v, 8, isSigned, ldigits)
+	case 'x':
+		p.fmt.fmt_integer(v, 16, isSigned, ldigits)
+	case 'X':
+		p.fmt.fmt_integer(v, 16, isSigned, udigits)
+	case 'c':
+		p.fmt.fmt_c(v)
+	case 'q':
+		if v <= utf8.MaxRune {
+			p.fmt.fmt_qc(v)
+		} else {
+			p.badVerb(verb)
+		}
+	case 'U':
+		p.fmt.fmt_unicode(v)
+	default:
+		p.badVerb(verb)
+	}
+}
+
+// fmtFloat formats a float. The default precision for each verb
+// is specified as last argument in the call to fmt_float.
+func (p *printer) fmtFloat(v float64, size int, verb rune) {
+	switch verb {
+	case 'b':
+		p.fmt.fmt_float(v, size, verb, -1)
+	case 'v':
+		verb = 'g'
+		fallthrough
+	case 'g', 'G':
+		if p.fmt.Sharp || p.fmt.SharpV {
+			p.fmt.fmt_float(v, size, verb, -1)
+		} else {
+			p.fmtVariableFloat(v, size)
+		}
+	case 'e', 'E':
+		if p.fmt.Sharp || p.fmt.SharpV {
+			p.fmt.fmt_float(v, size, verb, 6)
+		} else {
+			p.fmtScientific(v, size, 6)
+		}
+	case 'f', 'F':
+		if p.fmt.Sharp || p.fmt.SharpV {
+			p.fmt.fmt_float(v, size, verb, 6)
+		} else {
+			p.fmtDecimalFloat(v, size, 6)
+		}
+	default:
+		p.badVerb(verb)
+	}
+}
+
+func (p *printer) setFlags(f *number.Formatter) {
+	f.Flags &^= number.ElideSign
+	if p.fmt.Plus || p.fmt.Space {
+		f.Flags |= number.AlwaysSign
+		if !p.fmt.Plus {
+			f.Flags |= number.ElideSign
+		}
+	} else {
+		f.Flags &^= number.AlwaysSign
+	}
+}
+
+func (p *printer) updatePadding(f *number.Formatter) {
+	f.Flags &^= number.PadMask
+	if p.fmt.Minus {
+		f.Flags |= number.PadAfterSuffix
+	} else {
+		f.Flags |= number.PadBeforePrefix
+	}
+	f.PadRune = ' '
+	f.FormatWidth = uint16(p.fmt.Width)
+}
+
+func (p *printer) initDecimal(minFrac, maxFrac int) {
+	f := &p.toDecimal
+	f.MinIntegerDigits = 1
+	f.MaxIntegerDigits = 0
+	f.MinFractionDigits = uint8(minFrac)
+	f.MaxFractionDigits = int16(maxFrac)
+	p.setFlags(f)
+	f.PadRune = 0
+	if p.fmt.WidthPresent {
+		if p.fmt.Zero {
+			wid := p.fmt.Width
+			// Use significant integers for this.
+			// TODO: this is not the same as width, but so be it.
+			if f.MinFractionDigits > 0 {
+				wid -= 1 + int(f.MinFractionDigits)
+			}
+			if p.fmt.Plus || p.fmt.Space {
+				wid--
+			}
+			if wid > 0 && wid > int(f.MinIntegerDigits) {
+				f.MinIntegerDigits = uint8(wid)
+			}
+		}
+		p.updatePadding(f)
+	}
+}
+
+func (p *printer) initScientific(minFrac, maxFrac int) {
+	f := &p.toScientific
+	if maxFrac < 0 {
+		f.SetPrecision(maxFrac)
+	} else {
+		f.SetPrecision(maxFrac + 1)
+		f.MinFractionDigits = uint8(minFrac)
+		f.MaxFractionDigits = int16(maxFrac)
+	}
+	f.MinExponentDigits = 2
+	p.setFlags(f)
+	f.PadRune = 0
+	if p.fmt.WidthPresent {
+		f.Flags &^= number.PadMask
+		if p.fmt.Zero {
+			f.PadRune = f.Digit(0)
+			f.Flags |= number.PadAfterPrefix
+		} else {
+			f.PadRune = ' '
+			f.Flags |= number.PadBeforePrefix
+		}
+		p.updatePadding(f)
+	}
+}
+
+func (p *printer) fmtDecimalInt(v uint64, isSigned bool) {
+	var d number.Decimal
+
+	f := &p.toDecimal
+	if p.fmt.PrecPresent {
+		p.setFlags(f)
+		f.MinIntegerDigits = uint8(p.fmt.Prec)
+		f.MaxIntegerDigits = 0
+		f.MinFractionDigits = 0
+		f.MaxFractionDigits = 0
+		if p.fmt.WidthPresent {
+			p.updatePadding(f)
+		}
+	} else {
+		p.initDecimal(0, 0)
+	}
+	d.ConvertInt(p.toDecimal.RoundingContext, isSigned, v)
+
+	out := p.toDecimal.Format([]byte(nil), &d)
+	p.Buffer.Write(out)
+}
+
+func (p *printer) fmtDecimalFloat(v float64, size, prec int) {
+	var d number.Decimal
+	if p.fmt.PrecPresent {
+		prec = p.fmt.Prec
+	}
+	p.initDecimal(prec, prec)
+	d.ConvertFloat(p.toDecimal.RoundingContext, v, size)
+
+	out := p.toDecimal.Format([]byte(nil), &d)
+	p.Buffer.Write(out)
+}
+
+func (p *printer) fmtVariableFloat(v float64, size int) {
+	prec := -1
+	if p.fmt.PrecPresent {
+		prec = p.fmt.Prec
+	}
+	var d number.Decimal
+	p.initScientific(0, prec)
+	d.ConvertFloat(p.toScientific.RoundingContext, v, size)
+
+	// Copy logic of 'g' formatting from strconv. It is simplified a bit as
+	// we don't have to mind having prec > len(d.Digits).
+	shortest := prec < 0
+	ePrec := prec
+	if shortest {
+		prec = len(d.Digits)
+		ePrec = 6
+	} else if prec == 0 {
+		prec = 1
+		ePrec = 1
+	}
+	exp := int(d.Exp) - 1
+	if exp < -4 || exp >= ePrec {
+		p.initScientific(0, prec)
+
+		out := p.toScientific.Format([]byte(nil), &d)
+		p.Buffer.Write(out)
+	} else {
+		if prec > int(d.Exp) {
+			prec = len(d.Digits)
+		}
+		if prec -= int(d.Exp); prec < 0 {
+			prec = 0
+		}
+		p.initDecimal(0, prec)
+
+		out := p.toDecimal.Format([]byte(nil), &d)
+		p.Buffer.Write(out)
+	}
+}
+
+func (p *printer) fmtScientific(v float64, size, prec int) {
+	var d number.Decimal
+	if p.fmt.PrecPresent {
+		prec = p.fmt.Prec
+	}
+	p.initScientific(prec, prec)
+	rc := p.toScientific.RoundingContext
+	d.ConvertFloat(rc, v, size)
+
+	out := p.toScientific.Format([]byte(nil), &d)
+	p.Buffer.Write(out)
+
+}
+
+// fmtComplex formats a complex number v with
+// r = real(v) and j = imag(v) as (r+ji) using
+// fmtFloat for r and j formatting.
+func (p *printer) fmtComplex(v complex128, size int, verb rune) {
+	// Make sure any unsupported verbs are found before the
+	// calls to fmtFloat to not generate an incorrect error string.
+	switch verb {
+	case 'v', 'b', 'g', 'G', 'f', 'F', 'e', 'E':
+		p.WriteByte('(')
+		p.fmtFloat(real(v), size/2, verb)
+		// Imaginary part always has a sign.
+		if math.IsNaN(imag(v)) {
+			// By CLDR's rules, NaNs do not use patterns or signs. As this code
+			// relies on AlwaysSign working for imaginary parts, we need to
+			// manually handle NaNs.
+			f := &p.toScientific
+			p.setFlags(f)
+			p.updatePadding(f)
+			p.setFlags(f)
+			nan := f.Symbol(number.SymNan)
+			extra := 0
+			if w, ok := p.Width(); ok {
+				extra = w - utf8.RuneCountInString(nan) - 1
+			}
+			if f.Flags&number.PadAfterNumber == 0 {
+				for ; extra > 0; extra-- {
+					p.WriteRune(f.PadRune)
+				}
+			}
+			p.WriteString(f.Symbol(number.SymPlusSign))
+			p.WriteString(nan)
+			for ; extra > 0; extra-- {
+				p.WriteRune(f.PadRune)
+			}
+			p.WriteString("i)")
+			return
+		}
+		oldPlus := p.fmt.Plus
+		p.fmt.Plus = true
+		p.fmtFloat(imag(v), size/2, verb)
+		p.WriteString("i)") // TODO: use symbol?
+		p.fmt.Plus = oldPlus
+	default:
+		p.badVerb(verb)
+	}
+}
+
+func (p *printer) fmtString(v string, verb rune) {
+	switch verb {
+	case 'v':
+		if p.fmt.SharpV {
+			p.fmt.fmt_q(v)
+		} else {
+			p.fmt.fmt_s(v)
+		}
+	case 's':
+		p.fmt.fmt_s(v)
+	case 'x':
+		p.fmt.fmt_sx(v, ldigits)
+	case 'X':
+		p.fmt.fmt_sx(v, udigits)
+	case 'q':
+		p.fmt.fmt_q(v)
+	case 'm':
+		ctx := p.cat.Context(p.tag, rawPrinter{p})
+		if ctx.Execute(v) == catalog.ErrNotFound {
+			p.WriteString(v)
+		}
+	default:
+		p.badVerb(verb)
+	}
+}
+
+func (p *printer) fmtBytes(v []byte, verb rune, typeString string) {
+	switch verb {
+	case 'v', 'd':
+		if p.fmt.SharpV {
+			p.WriteString(typeString)
+			if v == nil {
+				p.WriteString(nilParenString)
+				return
+			}
+			p.WriteByte('{')
+			for i, c := range v {
+				if i > 0 {
+					p.WriteString(commaSpaceString)
+				}
+				p.fmt0x64(uint64(c), true)
+			}
+			p.WriteByte('}')
+		} else {
+			p.WriteByte('[')
+			for i, c := range v {
+				if i > 0 {
+					p.WriteByte(' ')
+				}
+				p.fmt.fmt_integer(uint64(c), 10, unsigned, ldigits)
+			}
+			p.WriteByte(']')
+		}
+	case 's':
+		p.fmt.fmt_s(string(v))
+	case 'x':
+		p.fmt.fmt_bx(v, ldigits)
+	case 'X':
+		p.fmt.fmt_bx(v, udigits)
+	case 'q':
+		p.fmt.fmt_q(string(v))
+	default:
+		p.printValue(reflect.ValueOf(v), verb, 0)
+	}
+}
+
+func (p *printer) fmtPointer(value reflect.Value, verb rune) {
+	var u uintptr
+	switch value.Kind() {
+	case reflect.Chan, reflect.Func, reflect.Map, reflect.Ptr, reflect.Slice, reflect.UnsafePointer:
+		u = value.Pointer()
+	default:
+		p.badVerb(verb)
+		return
+	}
+
+	switch verb {
+	case 'v':
+		if p.fmt.SharpV {
+			p.WriteByte('(')
+			p.WriteString(value.Type().String())
+			p.WriteString(")(")
+			if u == 0 {
+				p.WriteString(nilString)
+			} else {
+				p.fmt0x64(uint64(u), true)
+			}
+			p.WriteByte(')')
+		} else {
+			if u == 0 {
+				p.fmt.padString(nilAngleString)
+			} else {
+				p.fmt0x64(uint64(u), !p.fmt.Sharp)
+			}
+		}
+	case 'p':
+		p.fmt0x64(uint64(u), !p.fmt.Sharp)
+	case 'b', 'o', 'd', 'x', 'X':
+		if verb == 'd' {
+			p.fmt.Sharp = true // Print as standard go. TODO: does this make sense?
+		}
+		p.fmtInteger(uint64(u), unsigned, verb)
+	default:
+		p.badVerb(verb)
+	}
+}
+
+func (p *printer) catchPanic(arg interface{}, verb rune) {
+	if err := recover(); err != nil {
+		// If it's a nil pointer, just say "<nil>". The likeliest causes are a
+		// Stringer that fails to guard against nil or a nil pointer for a
+		// value receiver, and in either case, "<nil>" is a nice result.
+		if v := reflect.ValueOf(arg); v.Kind() == reflect.Ptr && v.IsNil() {
+			p.WriteString(nilAngleString)
+			return
+		}
+		// Otherwise print a concise panic message. Most of the time the panic
+		// value will print itself nicely.
+		if p.panicking {
+			// Nested panics; the recursion in printArg cannot succeed.
+			panic(err)
+		}
+
+		oldFlags := p.fmt.Parser
+		// For this output we want default behavior.
+		p.fmt.ClearFlags()
+
+		p.WriteString(percentBangString)
+		p.WriteRune(verb)
+		p.WriteString(panicString)
+		p.panicking = true
+		p.printArg(err, 'v')
+		p.panicking = false
+		p.WriteByte(')')
+
+		p.fmt.Parser = oldFlags
+	}
+}
+
+func (p *printer) handleMethods(verb rune) (handled bool) {
+	if p.erroring {
+		return
+	}
+	// Is it a Formatter?
+	if formatter, ok := p.arg.(format.Formatter); ok {
+		handled = true
+		defer p.catchPanic(p.arg, verb)
+		formatter.Format(p, verb)
+		return
+	}
+	if formatter, ok := p.arg.(fmt.Formatter); ok {
+		handled = true
+		defer p.catchPanic(p.arg, verb)
+		formatter.Format(p, verb)
+		return
+	}
+
+	// If we're doing Go syntax and the argument knows how to supply it, take care of it now.
+	if p.fmt.SharpV {
+		if stringer, ok := p.arg.(fmt.GoStringer); ok {
+			handled = true
+			defer p.catchPanic(p.arg, verb)
+			// Print the result of GoString unadorned.
+			p.fmt.fmt_s(stringer.GoString())
+			return
+		}
+	} else {
+		// If a string is acceptable according to the format, see if
+		// the value satisfies one of the string-valued interfaces.
+		// Println etc. set verb to %v, which is "stringable".
+		switch verb {
+		case 'v', 's', 'x', 'X', 'q':
+			// Is it an error or Stringer?
+			// The duplication in the bodies is necessary:
+			// setting handled and deferring catchPanic
+			// must happen before calling the method.
+			switch v := p.arg.(type) {
+			case error:
+				handled = true
+				defer p.catchPanic(p.arg, verb)
+				p.fmtString(v.Error(), verb)
+				return
+
+			case fmt.Stringer:
+				handled = true
+				defer p.catchPanic(p.arg, verb)
+				p.fmtString(v.String(), verb)
+				return
+			}
+		}
+	}
+	return false
+}
+
+func (p *printer) printArg(arg interface{}, verb rune) {
+	p.arg = arg
+	p.value = reflect.Value{}
+
+	if arg == nil {
+		switch verb {
+		case 'T', 'v':
+			p.fmt.padString(nilAngleString)
+		default:
+			p.badVerb(verb)
+		}
+		return
+	}
+
+	// Special processing considerations.
+	// %T (the value's type) and %p (its address) are special; we always do them first.
+	switch verb {
+	case 'T':
+		p.fmt.fmt_s(reflect.TypeOf(arg).String())
+		return
+	case 'p':
+		p.fmtPointer(reflect.ValueOf(arg), 'p')
+		return
+	}
+
+	// Some types can be done without reflection.
+	switch f := arg.(type) {
+	case bool:
+		p.fmtBool(f, verb)
+	case float32:
+		p.fmtFloat(float64(f), 32, verb)
+	case float64:
+		p.fmtFloat(f, 64, verb)
+	case complex64:
+		p.fmtComplex(complex128(f), 64, verb)
+	case complex128:
+		p.fmtComplex(f, 128, verb)
+	case int:
+		p.fmtInteger(uint64(f), signed, verb)
+	case int8:
+		p.fmtInteger(uint64(f), signed, verb)
+	case int16:
+		p.fmtInteger(uint64(f), signed, verb)
+	case int32:
+		p.fmtInteger(uint64(f), signed, verb)
+	case int64:
+		p.fmtInteger(uint64(f), signed, verb)
+	case uint:
+		p.fmtInteger(uint64(f), unsigned, verb)
+	case uint8:
+		p.fmtInteger(uint64(f), unsigned, verb)
+	case uint16:
+		p.fmtInteger(uint64(f), unsigned, verb)
+	case uint32:
+		p.fmtInteger(uint64(f), unsigned, verb)
+	case uint64:
+		p.fmtInteger(f, unsigned, verb)
+	case uintptr:
+		p.fmtInteger(uint64(f), unsigned, verb)
+	case string:
+		p.fmtString(f, verb)
+	case []byte:
+		p.fmtBytes(f, verb, "[]byte")
+	case reflect.Value:
+		// Handle extractable values with special methods
+		// since printValue does not handle them at depth 0.
+		if f.IsValid() && f.CanInterface() {
+			p.arg = f.Interface()
+			if p.handleMethods(verb) {
+				return
+			}
+		}
+		p.printValue(f, verb, 0)
+	default:
+		// If the type is not simple, it might have methods.
+		if !p.handleMethods(verb) {
+			// Need to use reflection, since the type had no
+			// interface methods that could be used for formatting.
+			p.printValue(reflect.ValueOf(f), verb, 0)
+		}
+	}
+}
+
+// printValue is similar to printArg but starts with a reflect value, not an interface{} value.
+// It does not handle 'p' and 'T' verbs because these should have been already handled by printArg.
+func (p *printer) printValue(value reflect.Value, verb rune, depth int) {
+	// Handle values with special methods if not already handled by printArg (depth == 0).
+	if depth > 0 && value.IsValid() && value.CanInterface() {
+		p.arg = value.Interface()
+		if p.handleMethods(verb) {
+			return
+		}
+	}
+	p.arg = nil
+	p.value = value
+
+	switch f := value; value.Kind() {
+	case reflect.Invalid:
+		if depth == 0 {
+			p.WriteString(invReflectString)
+		} else {
+			switch verb {
+			case 'v':
+				p.WriteString(nilAngleString)
+			default:
+				p.badVerb(verb)
+			}
+		}
+	case reflect.Bool:
+		p.fmtBool(f.Bool(), verb)
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		p.fmtInteger(uint64(f.Int()), signed, verb)
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		p.fmtInteger(f.Uint(), unsigned, verb)
+	case reflect.Float32:
+		p.fmtFloat(f.Float(), 32, verb)
+	case reflect.Float64:
+		p.fmtFloat(f.Float(), 64, verb)
+	case reflect.Complex64:
+		p.fmtComplex(f.Complex(), 64, verb)
+	case reflect.Complex128:
+		p.fmtComplex(f.Complex(), 128, verb)
+	case reflect.String:
+		p.fmtString(f.String(), verb)
+	case reflect.Map:
+		if p.fmt.SharpV {
+			p.WriteString(f.Type().String())
+			if f.IsNil() {
+				p.WriteString(nilParenString)
+				return
+			}
+			p.WriteByte('{')
+		} else {
+			p.WriteString(mapString)
+		}
+		keys := f.MapKeys()
+		for i, key := range keys {
+			if i > 0 {
+				if p.fmt.SharpV {
+					p.WriteString(commaSpaceString)
+				} else {
+					p.WriteByte(' ')
+				}
+			}
+			p.printValue(key, verb, depth+1)
+			p.WriteByte(':')
+			p.printValue(f.MapIndex(key), verb, depth+1)
+		}
+		if p.fmt.SharpV {
+			p.WriteByte('}')
+		} else {
+			p.WriteByte(']')
+		}
+	case reflect.Struct:
+		if p.fmt.SharpV {
+			p.WriteString(f.Type().String())
+		}
+		p.WriteByte('{')
+		for i := 0; i < f.NumField(); i++ {
+			if i > 0 {
+				if p.fmt.SharpV {
+					p.WriteString(commaSpaceString)
+				} else {
+					p.WriteByte(' ')
+				}
+			}
+			if p.fmt.PlusV || p.fmt.SharpV {
+				if name := f.Type().Field(i).Name; name != "" {
+					p.WriteString(name)
+					p.WriteByte(':')
+				}
+			}
+			p.printValue(getField(f, i), verb, depth+1)
+		}
+		p.WriteByte('}')
+	case reflect.Interface:
+		value := f.Elem()
+		if !value.IsValid() {
+			if p.fmt.SharpV {
+				p.WriteString(f.Type().String())
+				p.WriteString(nilParenString)
+			} else {
+				p.WriteString(nilAngleString)
+			}
+		} else {
+			p.printValue(value, verb, depth+1)
+		}
+	case reflect.Array, reflect.Slice:
+		switch verb {
+		case 's', 'q', 'x', 'X':
+			// Handle byte and uint8 slices and arrays special for the above verbs.
+			t := f.Type()
+			if t.Elem().Kind() == reflect.Uint8 {
+				var bytes []byte
+				if f.Kind() == reflect.Slice {
+					bytes = f.Bytes()
+				} else if f.CanAddr() {
+					bytes = f.Slice(0, f.Len()).Bytes()
+				} else {
+					// We have an array, but we cannot Slice() a non-addressable array,
+					// so we build a slice by hand. This is a rare case but it would be nice
+					// if reflection could help a little more.
+					bytes = make([]byte, f.Len())
+					for i := range bytes {
+						bytes[i] = byte(f.Index(i).Uint())
+					}
+				}
+				p.fmtBytes(bytes, verb, t.String())
+				return
+			}
+		}
+		if p.fmt.SharpV {
+			p.WriteString(f.Type().String())
+			if f.Kind() == reflect.Slice && f.IsNil() {
+				p.WriteString(nilParenString)
+				return
+			}
+			p.WriteByte('{')
+			for i := 0; i < f.Len(); i++ {
+				if i > 0 {
+					p.WriteString(commaSpaceString)
+				}
+				p.printValue(f.Index(i), verb, depth+1)
+			}
+			p.WriteByte('}')
+		} else {
+			p.WriteByte('[')
+			for i := 0; i < f.Len(); i++ {
+				if i > 0 {
+					p.WriteByte(' ')
+				}
+				p.printValue(f.Index(i), verb, depth+1)
+			}
+			p.WriteByte(']')
+		}
+	case reflect.Ptr:
+		// pointer to array or slice or struct?  ok at top level
+		// but not embedded (avoid loops)
+		if depth == 0 && f.Pointer() != 0 {
+			switch a := f.Elem(); a.Kind() {
+			case reflect.Array, reflect.Slice, reflect.Struct, reflect.Map:
+				p.WriteByte('&')
+				p.printValue(a, verb, depth+1)
+				return
+			}
+		}
+		fallthrough
+	case reflect.Chan, reflect.Func, reflect.UnsafePointer:
+		p.fmtPointer(f, verb)
+	default:
+		p.unknownType(f)
+	}
+}
+
+func (p *printer) badArgNum(verb rune) {
+	p.WriteString(percentBangString)
+	p.WriteRune(verb)
+	p.WriteString(badIndexString)
+}
+
+func (p *printer) missingArg(verb rune) {
+	p.WriteString(percentBangString)
+	p.WriteRune(verb)
+	p.WriteString(missingString)
+}
+
+func (p *printer) doPrintf(fmt string) {
+	for p.fmt.Parser.SetFormat(fmt); p.fmt.Scan(); {
+		switch p.fmt.Status {
+		case format.StatusText:
+			p.WriteString(p.fmt.Text())
+		case format.StatusSubstitution:
+			p.printArg(p.Arg(p.fmt.ArgNum), p.fmt.Verb)
+		case format.StatusBadWidthSubstitution:
+			p.WriteString(badWidthString)
+			p.printArg(p.Arg(p.fmt.ArgNum), p.fmt.Verb)
+		case format.StatusBadPrecSubstitution:
+			p.WriteString(badPrecString)
+			p.printArg(p.Arg(p.fmt.ArgNum), p.fmt.Verb)
+		case format.StatusNoVerb:
+			p.WriteString(noVerbString)
+		case format.StatusBadArgNum:
+			p.badArgNum(p.fmt.Verb)
+		case format.StatusMissingArg:
+			p.missingArg(p.fmt.Verb)
+		default:
+			panic("unreachable")
+		}
+	}
+
+	// Check for extra arguments, but only if there was at least one ordered
+	// argument. Note that this behavior is necessarily different from fmt:
+	// different variants of messages may opt to drop some or all of the
+	// arguments.
+	if !p.fmt.Reordered && p.fmt.ArgNum < len(p.fmt.Args) && p.fmt.ArgNum != 0 {
+		p.fmt.ClearFlags()
+		p.WriteString(extraString)
+		for i, arg := range p.fmt.Args[p.fmt.ArgNum:] {
+			if i > 0 {
+				p.WriteString(commaSpaceString)
+			}
+			if arg == nil {
+				p.WriteString(nilAngleString)
+			} else {
+				p.WriteString(reflect.TypeOf(arg).String())
+				p.WriteString("=")
+				p.printArg(arg, 'v')
+			}
+		}
+		p.WriteByte(')')
+	}
+}
+
+func (p *printer) doPrint(a []interface{}) {
+	prevString := false
+	for argNum, arg := range a {
+		isString := arg != nil && reflect.TypeOf(arg).Kind() == reflect.String
+		// Add a space between two non-string arguments.
+		if argNum > 0 && !isString && !prevString {
+			p.WriteByte(' ')
+		}
+		p.printArg(arg, 'v')
+		prevString = isString
+	}
+}
+
+// doPrintln is like doPrint but always adds a space between arguments
+// and a newline after the last argument.
+func (p *printer) doPrintln(a []interface{}) {
+	for argNum, arg := range a {
+		if argNum > 0 {
+			p.WriteByte(' ')
+		}
+		p.printArg(arg, 'v')
+	}
+	p.WriteByte('\n')
+}