[PATCH] Replacing one diagnostic with another

Jordan Rose jordan_rose at apple.com
Tue Jul 23 17:50:22 PDT 2013

Ah, hm, yeah. Passing in the number of total arguments is rather annoying. I guess duplicate diagnostics is the best way to go, since in almost every case the call site will know which one to use. I still find it better for the user than saying "parameter 1" for a one-parameter attribute.


On Jul 23, 2013, at 14:11 , Aaron Ballman <aaron at aaronballman.com> wrote:

> From what I can tell, that makes using the diagnostic rather complex.
> Perhaps it could be split into two diagnostics using the same list?
> def err_attribute_argument_n_type : Error<
>  "%0 attribute requires parameter %1 to be %select{int or bool|an integer "
>  "constant|a string|an identifier}2">;
> def err_attribute_argument_type : Error<
>  "%0 attribute requires %select{int or bool|an integer "
>  "constant|a string|an identifier}1">;
> I'm not keen on the duplication, but I can't seem to find a way to
> make plural work that doesn't require the caller to pass in the
> expected number of arguments along with the argument the diagnostic is
> for.
> ~Aaron
> On Tue, Jul 23, 2013 at 12:02 PM, Jordan Rose <jordan_rose at apple.com> wrote:
>> Mm...seems a bit weird to index the attribute parameters when there's only one. Can we special case that with a %plural?
>> Jordan
>> On Jul 23, 2013, at 8:47 , Aaron Ballman <aaron at aaronballman.com> wrote:
>>> The err_attribute_not_string error seems like it can be subsumed by
>>> the err_attribute_argument_n_type diagnostic; the main difference
>>> between the two being that the latter specifies an argument position
>>> while the former does not.
>>> This patch performs the replacement, but I wanted to make sure it was
>>> acceptable.  If the consensus is that this is fine, I will commit a
>>> separate patch that does the same for err_attribute_argument_not_int.
>>> ~Aaron
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