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Add more notes about short circuiting, include equivalent if-else expressions

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boyned//Kampfkarren 2021-11-08 23:00:07 -08:00
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commit 3955bcb2e3
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13
rfcs/syntax-safe-navigation-operator.md
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@ -77,9 +77,16 @@ Failing the nil-safety check early would make the entire expression nil, for ins
The list of valid operators to follow the safe navigation operator would be: The list of valid operators to follow the safe navigation operator would be:
```lua ```lua
dog?.name dog?.name == if dog == nil then nil else dog.name
dog?.getName() dog?.getName() == if dog == nil then nil else dog.getName()
dog?:getName() dog?:getName(args) == if dog == nil then nil else dog:getName(args)
```
When using safe navigation to call a function, the short circuiting will prevent the arguments from being evaluated in the case of nil.
```lua
-- Will NOT call getValue() if `object` is nil
object?.doSomething(getValue())
``` ```
The operator must be used in the context of either a call or an index, and so: The operator must be used in the context of either a call or an index, and so: