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+// Copyright 2016 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.
+
+// +build ignore
+
+package main
+
+// Form defines a plural form.
+//
+// Not all languages support all forms. Also, the meaning of each form varies
+// per language. It is important to note that the name of a form does not
+// necessarily correspond one-to-one with the set of numbers. For instance,
+// for Croation, One matches not only 1, but also 11, 21, etc.
+//
+// Each language must at least support the form "other".
+type Form byte
+
+const (
+ Other Form = iota
+ Zero
+ One
+ Two
+ Few
+ Many
+)
+
+var countMap = map[string]Form{
+ "other": Other,
+ "zero": Zero,
+ "one": One,
+ "two": Two,
+ "few": Few,
+ "many": Many,
+}
+
+type pluralCheck struct {
+ // category:
+ // 3..7: opID
+ // 0..2: category
+ cat byte
+ setID byte
+}
+
+// opID identifies the type of operand in the plural rule, being i, n or f.
+// (v, w, and t are treated as filters in our implementation.)
+type opID byte
+
+const (
+ opMod opID = 0x1 // is '%' used?
+ opNotEqual opID = 0x2 // using "!=" to compare
+ opI opID = 0 << 2 // integers after taking the absolute value
+ opN opID = 1 << 2 // full number (must be integer)
+ opF opID = 2 << 2 // fraction
+ opV opID = 3 << 2 // number of visible digits
+ opW opID = 4 << 2 // number of visible digits without trailing zeros
+ opBretonM opID = 5 << 2 // hard-wired rule for Breton
+ opItalian800 opID = 6 << 2 // hard-wired rule for Italian
+ opAzerbaijan00s opID = 7 << 2 // hard-wired rule for Azerbaijan
+)
+const (
+ // Use this plural form to indicate the next rule needs to match as well.
+ // The last condition in the list will have the correct plural form.
+ andNext = 0x7
+ formMask = 0x7
+
+ opShift = 3
+
+ // numN indicates the maximum integer, or maximum mod value, for which we
+ // have inclusion masks.
+ numN = 100
+ // The common denominator of the modulo that is taken.
+ maxMod = 100
+)