[SE-0096] Implement type(of:) #3878
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@swift-ci please smoke test. |
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Cool 👍 Are we keeping compatibility with |
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This change is source breaking. It will be compatible until the next patch where I yank support for |
| if (Tok.canBeArgumentLabel() && peekToken().is(tok::colon)) { | ||
| bool hasOf = Tok.getText() == "of"; | ||
| if (!hasOf) { | ||
| // User mis-spelled the 'of' label. |
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Does this mean it's impossible for user code to define a function named type (with any argument label)?
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It does. It is a limitation of the SE that deserves to be discussed. One solution would be to make this a "magic hash-prefix" function like #selector.
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Originally we wanted this function defined in stdlib and not in the parser. But that can't happen for bureaucratic reasons related to protocols and other nominal types having differing expressions allowed after these dynamicType contexts.
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Nevertheless, I think I'm going to disable this diagnostic when I do the next patch to properly remove the keyword and make the parser fall back to find user-defined functions.
What's in this pull request?
In the interest of getting this patch in quickly (and because I already have the work done) this patch is going to supersede #3871.
Resolved bug number: (SR-2218)
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