logos-storage/questionable
1
0
Fork 0
mirror of https://github.com/logos-storage/questionable.git synced 2026-01-07 16:23:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

Convert Result to Option

Browse Source
This commit is contained in:
Mark Spanbroek 2021-03-08 17:48:07 +01:00
parent c7fabfc23b
commit 1ad83adc9d
3 changed files with 20 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Readme.md
View File

@ -179,6 +179,14 @@ let x = parseInt("42").catch # equals 42.success
let y = parseInt("XX").catch # equals int.failure(..) let y = parseInt("XX").catch # equals int.failure(..)
``` ```
### Conversion to Option
Any Result can be converted to an Option:
```nim
let converted = works().toOption # equals @[1, 1, 2, 2, 2].some
```
Banning Errors Banning Errors
-------------- --------------

7
questionable/results.nim
View File

@ -1,3 +1,4 @@
import ./options
import ./resultsbase import ./resultsbase
include ./errorban include ./errorban
@ -27,6 +28,12 @@ template `=?`*[T](name: untyped{nkIdent}, value: ?!T): bool =
template name: T {.used.} = value.unsafeGet() template name: T {.used.} = value.unsafeGet()
value.isOk value.isOk
proc toOption*[T,E](value: Result[T,E]): ?T =
if value.isOk:
value.unsafeGet.some
else:
T.none
template liftUnary(_: type Result, operator: untyped) = template liftUnary(_: type Result, operator: untyped) =
template `operator`*(a: ?!typed): ?!typed = template `operator`*(a: ?!typed): ?!typed =

5
testmodules/result/test.nim
View File

@ -1,6 +1,7 @@
import std/unittest import std/unittest
import std/sequtils import std/sequtils
import std/strutils import std/strutils
import pkg/questionable
import pkg/questionable/results import pkg/questionable/results
suite "result": suite "result":
@ -94,6 +95,10 @@ suite "result":
check (40.success >= 42 == false.success) check (40.success >= 42 == false.success)
check (40.success > 42 == false.success) check (40.success > 42 == false.success)
test "Result can be converted to Option":
check 42.success.toOption == 42.some
check int.failure(error).toOption == int.none
test "examples from readme work": test "examples from readme work":
proc works: ?!seq[int] = proc works: ?!seq[int] =