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unit: add Torque type

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This commit is contained in:
Dan Kortschak
2019-03-29 12:07:17 +10:30
committed by GitHub
parent 50d2d73eeb
commit d7acb40536
5 changed files with 145 additions and 8 deletions
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11
unit/doc.go
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@@ -104,17 +104,12 @@
// Different physical ideas are sometimes expressed with the same dimensions
// and unit is incapable of catching these mismatches. For example, energy and
// torque are both expressed as force times distance (Newton-meters in SI),
// but it is wrong to say that a torque of 10 N-m is the same as 10 J, even
// but it is wrong to say that a torque of 10 N·m is the same as 10 J, even
// though the dimensions agree. Despite this, using the defined types to
// represent units can help to catch errors at compile-time. For example,
// using unit.Torque allows you to define a statically typed function like so
//
// type Torque float64
//
// func (t Torque) Unit() *Unit {...
//
// allows you to define a statically typed function like so
//
// func LeverLength(apply unit.Force, want Torque) unit.Length {
// func LeverLength(apply unit.Force, want unit.Torque) unit.Length {
// return unit.Length(float64(want)/float64(apply))
// }
//