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78 lines
2.5 KiB
Go
78 lines
2.5 KiB
Go
// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package number
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// TODO:
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// p.Printf("The gauge was at %v.", number.Spell(number.Percent(23)))
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// // Prints: The gauge was at twenty-three percent.
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//
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// p.Printf("From here to %v!", number.Spell(math.Inf()))
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// // Prints: From here to infinity!
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//
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import (
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"golang.org/x/text/internal/number"
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)
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const (
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decimalVerbs = "vfgd"
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scientificVerbs = "veg"
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)
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// Decimal formats a number as a floating point decimal.
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func Decimal(x interface{}, opts ...Option) Formatter {
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return newFormatter(decimalOptions, opts, x)
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}
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var decimalOptions = newOptions(decimalVerbs, (*number.Formatter).InitDecimal)
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// Scientific formats a number in scientific format.
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func Scientific(x interface{}, opts ...Option) Formatter {
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return newFormatter(scientificOptions, opts, x)
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}
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var scientificOptions = newOptions(scientificVerbs, (*number.Formatter).InitScientific)
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// Engineering formats a number using engineering notation, which is like
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// scientific notation, but with the exponent normalized to multiples of 3.
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func Engineering(x interface{}, opts ...Option) Formatter {
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return newFormatter(engineeringOptions, opts, x)
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}
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var engineeringOptions = newOptions(scientificVerbs, (*number.Formatter).InitEngineering)
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// Percent formats a number as a percentage. A value of 1.0 means 100%.
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func Percent(x interface{}, opts ...Option) Formatter {
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return newFormatter(percentOptions, opts, x)
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}
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var percentOptions = newOptions(decimalVerbs, (*number.Formatter).InitPercent)
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// PerMille formats a number as a per mille indication. A value of 1.0 means
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// 1000‰.
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func PerMille(x interface{}, opts ...Option) Formatter {
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return newFormatter(perMilleOptions, opts, x)
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}
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var perMilleOptions = newOptions(decimalVerbs, (*number.Formatter).InitPerMille)
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// TODO:
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// - Shortest: akin to verb 'g' of 'G'
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//
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// TODO: RBNF forms:
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// - Compact: 1M 3.5T
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// - CompactBinary: 1Mi 3.5Ti
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// - Long: 1 million
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// - Ordinal:
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// - Roman: MCMIIXX
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// - RomanSmall: mcmiixx
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// - Text: numbers as it typically appears in running text, allowing
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// language-specific choices for when to use numbers and when to use words.
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// - Spell?: spelled-out number. Maybe just allow as an option?
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// NOTE: both spelled-out numbers and ordinals, to render correctly, need
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// detailed linguistic information from the translated string into which they
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// are substituted. We will need to implement that first.
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