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fix: TypeScript's option checking return value should be noImplicitReturns #700

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fix: TypeScript's option checking return value should be noImplicitReturns #700

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4 changes: 2 additions & 2 deletions docs/types/discriminated-unions.md
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Expand Up @@ -128,9 +128,9 @@ function area(s: Shape) {

[references-discriminated-union]:https://github.com/Microsoft/TypeScript/pull/9163

### strictNullChecks
### noImplicitReturns

If using *strictNullChecks* and doing exhaustive checks, TypeScript might complain "not all code paths return a value". You can silence that by simply returning the `_exhaustiveCheck` variable (of type `never`). So:
If using *noImplicitReturns* and doing exhaustive checks, TypeScript might complain "not all code paths return a value". You can silence that by simply returning the `_exhaustiveCheck` variable (of type `never`). So:

```ts
function area(s: Shape) {
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