Zie Weaver 9687a8ea75 Add a template gadget to detect whether a type supports the ostream operator. ...

I.e. for a type `Example`, if
```
std::ostream& operator<<(std::ostream&, const Example&);
```
is declared, `absl::HasOstreamOperator<Example>::value` is `true`.
PiperOrigin-RevId: 574637891
Change-Id: I123d8f35a6e3ea894745133f7d81b1610fb475d5

2023-10-18 16:18:51 -07:00

1.3 KiB

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