rfc:mixed_type_v2
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| Both sides previous revisionPrevious revision | Next revisionBoth sides next revision | ||
| rfc:mixed_type_v2 [2020/04/20 11:20] – danack | rfc:mixed_type_v2 [2020/04/28 14:44] – added note about explicit returns danack | ||
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| Line 271: | Line 271: | ||
| //INVALID - Fatal error: Mixed types cannot be nullable, null is already part of the mixed type. | //INVALID - Fatal error: Mixed types cannot be nullable, null is already part of the mixed type. | ||
| function bar(): ?mixed {} | function bar(): ?mixed {} | ||
| + | </ | ||
| + | |||
| + | |||
| + | |||
| + | ==== Explicit returns ==== | ||
| + | |||
| + | When using mixed as a return type, a value must be explicitly returned from the function, otherwise a TypeError will be thrown. | ||
| + | |||
| + | <code php> | ||
| + | function foo(): mixed {} | ||
| + | |||
| + | foo(); | ||
| + | |||
| + | // Uncaught TypeError: Return value of foo() must be of | ||
| + | // the type mixed, none returned | ||
| + | </ | ||
| + | |||
| + | This is consistent with the existing behaviour for other return types. | ||
| + | |||
| + | <code php> | ||
| + | function bar(): ?int {} | ||
| + | bar(); | ||
| + | // Uncaught TypeError: Return value of bar() must be of | ||
| + | // the type int or null, none returned | ||
| + | |||
| </ | </ | ||
rfc/mixed_type_v2.txt · Last modified: 2020/05/22 14:22 by kocsismate