Working with Nim's macros 👑 is just Voodoo
nimble install voodoo
- Compile-time utility tool
- Helps reduce code size & repetitive tasks
- Generate fast
getters/setters - Callee Introspection
Generate fast getters from object fields. Excluding fields is also possible.
import pkg/voodoo
type
Price* {.getters.} = object
net, gross: string
Product* {.getters: [id].} = object # exclude one or more fields
id: string
title, short_description: string
price: Price
expandGetters() # is required to expand generated procs.Output:
proc getNet*(price: Price): string =
## Get `net` from `Price`
result = price.net
proc getGross*(price: Price): string =
## Get `gross` from `Price`
result = price.gross
proc getTitle*(product: Product): string =
## Get `title` from `Product`
result = product.title
proc getShortDescription*(product: Product): string =
## Get `short_description` from `Product`
result = product.short_description
proc getPrices*(product: Product): Price =
## Get `price` from `Product`
result = product.pricetodo
It's easy to make extensible enums/objects. This may allow other modules/packages to extend the functionality as if they were written in the original source.
Also, extensible pragma works with both public or private definitions. Well, that looks like Voodoo to me!
import pkg/voodoo/extensible
type
Cardinal* {.extensible} = enum
north, westDone! Now Cardinal is an extensible enum. Any other modules/packages importing it
can easily add fields to this enum. Yep, that's voodoo!
import pkg/voodoo/extensible
extendEnum Cardinal:
south
east
import ./cardinalModule
assert compiles(Cardinal.north)
assert compiles(Cardinal.south)
assert compiles(Cardinal.east)- 🐛 Found a bug? Create a new Issue
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