chrome/common/ipc_maybe.h - Issue 155905: Separates ipc code from common (http://crbug.com/16829)

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Side by Side Diff: chrome/common/ipc_maybe.h

Issue 155905: Separates ipc code from common (http://crbug.com/16829) (Closed)

Patch Set: Fixes reference to 'common_message_traits' it's actually 'common_param_traits' Created 11 years, 5 months ago

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1 #ifndef CHROME_COMMON_MAYBE_H_

2 #define CHROME_COMMON_MAYBE_H_

3

4 namespace IPC {

5

6 // The Maybe type can be used to avoid serialising a type when it's invalid.

7 // This is most useful in conjunction with FileDescriptor, as there's no

8 // possible invalid value which can be serialised (one can type to use -1, but

9 // the IPC channel will fail). It may also be useful if the invalid value is

10 // otherwise expensive to serialise.

11 template<typename A>

12 struct Maybe {

13 bool valid;

14 A value;

15 };

16

17 } // namespace IPC

18

19 #endif // CHROME_COMMON_MAYBE_H_

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