refine value provider check if user passes a 'undefined' value

[intellild]

If user pass { useValue: undefined }, isProvider returns false,
causing

tsyringe/src/dependency-container.ts

Line 91 in f738999

if (!isProvider(providerOrConstructor)) {

treat the object as a class

---

[risenxxx]

Fixed this in tsyringe-neo

[etiennenoel]

What is the use case to register undefined for a certain token? Would using the new isOptional property of @inject solve this?

[intellild]

What is the use case to register undefined for a certain token? Would using the new isOptional property of @inject solve this?

isOptional won't work, the use case is that register is called dynamically at runtime and the value could be undefined as expected. The issue is isValueProvider check is not accurate and the provider is treated as other providers and result in unexpected behavior.

[intellild]

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