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Section: 188.8.131.52 [thread.mutex.requirements.mutex] Status: NAD Submitter: Pete Becker Opened: 2011-10-17 Last modified: 2017-02-03
Priority: Not Prioritized
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184.108.40.206 [thread.mutex.requirements.mutex]/6, fourth bullet requires the return type of m.lock() to be void.This is over-constrained. The true requirement is that the standard library ignores any value that the function returns. Yes, allowing non-void return types means that users can't store a pointer to this member function. No, that's not the least bit important. [See also the discussion following c++std-lib-31318]
This does not specify a concept; it specifies requirements on the concrete mutex types.