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Quantity aliasing #78

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Aehmlo opened this issue Apr 20, 2018 · 1 comment
Closed

Quantity aliasing #78

Aehmlo opened this issue Apr 20, 2018 · 1 comment

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@Aehmlo
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Aehmlo commented Apr 20, 2018

There are applications where units that evaluate to the same thing have very different meanings (torque vs. work, pressure vs. stress, etc.). It seems less-than-ergonomic to me to require the user to use si::pressure::megapascal (or use si::pressure as stress or whatever) for a stress of 1 MPa, for instance. I would like to see some way to have units duplicated under another name using DRY principles, although I'm not sure what this would look like (possibly just some new syntax in the system! macro?).
@iliekturtles iliekturtles changed the title Quantity aliasing? Quantity aliasing Apr 22, 2018
@iliekturtles
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I've been thinking/experimenting with this for a long time under #3 because thermodynamic temperature and temperature interval both have the same dimensions. Will continue my efforts under this issue since the problem is spelled out explicitly.

Current thought is to add another PhantomData member to Dimension to distinguish between quantities with the same actual dimensions. I haven't fully explored the idea however.

@iliekturtles iliekturtles mentioned this issue Apr 22, 2018
Closed
iliekturtles added a commit that referenced this issue May 20, 2018
@iliekturtles
Add a Kind associated type to Dimensions.
3b82692 
The new `Kind` associated type, defaulting to `()`, allows for multiple
quantities that have the same dimensions to be defined. Quantities of
different kind are not comparable. Resolves #78.
@iliekturtles iliekturtles mentioned this issue Jun 4, 2018
Closed
@iliekturtles iliekturtles mentioned this issue Jul 7, 2018
Closed
iliekturtles added a commit that referenced this issue Jul 7, 2018
@iliekturtles
Add a Kind associated type to Dimensions.
62bcb50 
The new `Kind` associated type, defaulting to `()`, allows for multiple
quantities that have the same dimensions to be defined. Quantities of
different kind are not comparable. Resolves #78.
iliekturtles added a commit that referenced this issue Jul 9, 2018
@iliekturtles
Add a Kind associated type to Dimensions.
aac6226 
The new `Kind` associated type, defaulting to `()`, allows for multiple
quantities that have the same dimensions to be defined. Quantities of
different kind are not comparable. Resolves #78.
iliekturtles added a commit that referenced this issue Aug 4, 2018
@iliekturtles
Add a Kind associated type to Dimensions.
7a44bb5 
The new `Kind` associated type, defaulting to `()`, allows for multiple
quantities that have the same dimensions to be defined. Quantities of
different kind are not comparable. Resolves #78.
iliekturtles added a commit that referenced this issue Aug 4, 2018
@iliekturtles
Add a Kind associated type to Dimensions.
e5c0c2d 
The new `Kind` associated type, defaulting to `()`, allows for multiple
quantities that have the same dimensions to be defined. Quantities of
different kind are not comparable. Resolves #78.
iliekturtles added a commit that referenced this issue Aug 5, 2018
@iliekturtles
Add a Kind associated type to Dimensions.
9a9dca9 
The new `Kind` associated type, defaulting to `uom::Kind`, allows for
multiple quantities that have the same dimensions. Quantities of
different kinds are not comparable. The marker traits implemented by a
quantity's `Kind` control which operations are automatically
implemented. Resolves #78.
iliekturtles added a commit that referenced this issue Sep 6, 2018
@iliekturtles
Add a Kind associated type to Dimensions.
2e5f237 
The new `Kind` associated type, defaulting to `uom::Kind`, allows for
multiple quantities that have the same dimensions. Quantities of
different kinds are not comparable. The marker traits implemented by a
quantity's `Kind` control which operations are automatically
implemented. Resolves #78.
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@Aehmlo @iliekturtles