Comments (6)
There is no global configuration for custom functions available, but in NTypewriter (contrary to Typewriter) custom functions can have parameters, thus I would just add an additional optional parameter to this method to affect its behaviour.
You are welcome to prepare a pull request, just do not forget to include tests for this change.
from ntypewriter.
I would like to add a function similar to ToTypeScriptType
that does not append anything for nullables. Such a function would be much more flexible, you can now easily append a postfix yourself, like so:
{{ if property.Type.IsNullable }} | undefined{{ end }}
Full example:
{{ property.Name | String.ToCamelCase }}: {{ property.Type | Type.ToTypeScriptType }}{{ if property.Type.IsNullable }} | undefined{{ end }};
This would cover all cases, but requires more code in the template (not a bad thing in my opinion).
What are your thoughts on this? If you agree, what should this function be named so that the distinction between ToTypeScriptType
and the new function is obvious? Ideally the behavior of ToTypeScriptType
could be changed to avoid polluting the interface, but that would be a breaking change.
from ntypewriter.
At the current stage, breaking changes are not a problem. But in that case, I would leave the behaviour of ToTypeScriptType
as it is, because | null
is the most accurate equivalent of nullable type.
The function that you described already exists, only needs a few tweaks: add null checking, documentation, make it public
But the name is awful and it shows that I did not have an idea how to name it. Something better is needed, that will underline distinction. And most obvious choices seem too long :
ToTypeScriptTypeNotNullable
ToTypeScriptTypeRaw
ToTypeScriptTypeExtant
and more ideas on how to replace the phrase
not null
:https://stackoverflow.com/questions/14273820/is-there-a-single-word-meaning-not-null
from ntypewriter.
I know you just said you want to leave the behavior of ToTypeScriptType
as-is, but I'll make the following suggestions anyway:
How about renaming the existing function to ToTypeScriptUnionType
and use ToTypeScriptType
for the non-nullable variant?
Or, perhaps even better, an optional boolean argument named "nullable"
. It could be true by default if that's the default behavior you'd want.
from ntypewriter.
I would go with the proposed nullable
parameter, it seems most obvious from a user perspective what it does.
from ntypewriter.
After doing some work on this, I realized that having only an option to exclude the nullable postfix isn't going to be sufficient for my use case. Arrays and generics make things a little more complicated. The function currently produces the following:
myProperty: int | null[]
myProperty: MyGeneric<int | null>
In these cases, I'd like to be able to configure NTypewriter to use | undefined
instead.
By the way, int | null[]
is a bug. This is a type that can either be an int, or an array containing nulls. This does not represent an array that contains nullable ints.. It should be (int | null)[]
or Array<int | null>
instead. I will create a pull request soon that fixes this problem.
from ntypewriter.
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from ntypewriter.