softwaremill / softwaremill/macwire

Consider banning primitive types from wiring candidates

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autowire
Dominant language
Scala
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Description

Sometimes if you forget to add a dependency to autowire's parameters which needs manual creation you get errors such as a missing String dependency (if a String is needed to create said instance).

Maybe we should short-circuit even earlier, that is report an error any time someone tries to create an instance parametrised by any type from scala.*. Maybe the blacklist should also include java.lang.*, java.util.* and the like. What do you think?

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Research direction

Start by tracing how macwire selects wiring candidates and reports a missing String dependency. Define which scala., java.lang., java.util.*, and similar types should be excluded, then verify that forgotten manually-created dependencies produce the intended diagnostic without excluding valid candidates.

Written by the indexing model from the issue text.

Assessment

Tech stack
scala
Domain
backend
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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