First commit

vendor/golang.org/x/text/internal/format/format.go

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+// 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 format contains types for defining language-specific formatting of
+// values.
+//
+// This package is internal now, but will eventually be exposed after the API
+// settles.
+package format // import "golang.org/x/text/internal/format"
+
+import (
+	"fmt"
+
+	"golang.org/x/text/language"
+)
+
+// State represents the printer state passed to custom formatters. It provides
+// access to the fmt.State interface and the sentence and language-related
+// context.
+type State interface {
+	fmt.State
+
+	// Language reports the requested language in which to render a message.
+	Language() language.Tag
+
+	// TODO: consider this and removing rune from the Format method in the
+	// Formatter interface.
+	//
+	// Verb returns the format variant to render, analogous to the types used
+	// in fmt. Use 'v' for the default or only variant.
+	// Verb() rune
+
+	// TODO: more info:
+	// - sentence context such as linguistic features passed by the translator.
+}
+
+// Formatter is analogous to fmt.Formatter.
+type Formatter interface {
+	Format(state State, verb rune)
+}