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reference: explain what "implies" means in Closure types section #26793

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tshepang opened this issue Jul 5, 2015 · 3 comments
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reference: explain what "implies" means in Closure types section #26793

tshepang opened this issue Jul 5, 2015 · 3 comments

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@tshepang
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tshepang commented Jul 5, 2015

There are these 2 statements in 8.1.10:

FnMut implies FnOnce
Fn implies FnMut and FnOnce

Is the word implies used correctly? What does it mean?
@steveklabnik
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It means that if you implement FnMut, you've also implemented FnOnce. It's a trait inheritance hierarchy.

@tshepang
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tshepang commented Jul 5, 2015

I was hoping a PR would close this issue @steveklabnik

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tshepang commented Jul 5, 2015

here goes: #26808

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@steveklabnik @tshepang