use units::si
use units::misc

### Imperial unit system

@name("Inch")
@url("https://en.wikipedia.org/wiki/Inch")
@aliases(inches, in: short)
unit inch: Length = 0.0254 meter

@name("Foot")
@url("https://en.wikipedia.org/wiki/Foot_(unit)")
@aliases(feet, ft: short)
unit foot: Length = 12 inch

@name("Yard")
@url("https://en.wikipedia.org/wiki/Yard")
@aliases(yards, yd: short)
unit yard: Length = 3 feet

@name("Mile")
@url("https://en.wikipedia.org/wiki/Mile")
@aliases(miles, mi: short)
unit mile: Length = 1760 yard

@name("Thousandth of an inch")
@url("https://en.wikipedia.org/wiki/Thousandth_of_an_inch")
@aliases(mils, mil: short)
unit thou: Length = inch / 1000

@name("Fathom")
@url("https://en.wikipedia.org/wiki/Fathom")
@aliases(fathoms)
unit fathom: Length = 2 yard

@name("League")
@url("https://en.wikipedia.org/wiki/League_(unit)")
@aliases(leagues)
unit league: Length = 3 mile

@name("Grain")
@url("https://en.wikipedia.org/wiki/Grain_(unit)")
@aliases(grains)
unit grain: Mass = 64.79891 milligram

@name("Pound")
@url("https://en.wikipedia.org/wiki/Pound_(mass)")
@aliases(pounds, lb: short, lbs)
unit pound: Mass = 7000 grain

@name("Ounce")
@url("https://en.wikipedia.org/wiki/Ounce")
@aliases(ounces, oz: short)
unit ounce: Mass = (1 / 16) × pound

@name("Stone")
@url("https://en.wikipedia.org/wiki/Stone_(unit)")
unit stone: Mass = 14 pound

@name("Hundredweight")
@url("https://en.wikipedia.org/wiki/Hundredweight")
@aliases(cwt)
unit long_hundredweight = 8 stone

@name("Long ton")
@url("https://en.wikipedia.org/wiki/Long_ton")
@aliases(long_tons)
unit long_ton: Mass = 2240 lb

@name("Miles per hour")
@url("https://en.wikipedia.org/wiki/Miles_per_hour")
unit mph: Velocity = miles per hour

@name("Inch of mercury")
@url("https://en.wikipedia.org/wiki/Inch_of_mercury")
unit inHg: Pressure = in Hg

@name("Imperial Fluid Ounce")
@url("https://en.wikipedia.org/wiki/Fluid_ounce")
@aliases(imperial_fluidounces, UK_floz: short)
unit imperial_fluidounce: Volume = 28.4130625 mL

@name("Imperial Pint")
@url("https://en.wikipedia.org/wiki/Pint#Imperial_pint")
@aliases(imperial_pints, UK_pt: short)
unit imperial_pint: Volume = 20 imperial_fluidounces

@name("Imperial Quart")
@url("https://en.wikipedia.org/wiki/Quart#Imperial_quart")
@aliases(imperial_quarts, UK_qt: short)
unit imperial_quart: Volume = 2 imperial_pints

@name("Imperial Gallon")
@url("https://en.wikipedia.org/wiki/Gallon#Imperial_gallon")
@aliases(imperial_gallons, UK_gal: short)
unit imperial_gallon: Volume = 4 imperial_quart

@name("Imperial Bushel")
@url("https://en.wikipedia.org/wiki/Bushel#Imperial_bushel")
@aliases(imperial_bushels, UK_bu: short)
unit imperial_bushel: Volume = 8 imperial_gallons

@name("Imperial Fluid Drachm")
@url("https://en.wikipedia.org/wiki/Fluid_drachm#Imperial_fluid_drachm")
@aliases(imperial_fluid_drachms, UK_fldr: short)
unit imperial_fluid_drachm: Volume = 1/8 × imperial_fluidounce

@name("Imperial Gill")
@url("https://en.wikipedia.org/wiki/Gill_(unit)")
@aliases(imperial_gills, UK_gi: short)
unit imperial_gill: Volume = 5 imperial_fluidounces