labath added a comment.
In https://reviews.llvm.org/D29514#666341, @zturner wrote:
> If we do what you suggest, then we are relying on the `lldb::Error` format
> provider, which does not have the ability to accept this kind of "contextual
> reason" string (i.e. the string "While reading the %d'th item" in the above
> example). So if we did this:
>
> LLDB_LOG(log, error, "While reading the {0}'th item", 7)
>
>
> Then the entire error must be formatted independently of the entire context
> string. So we could produce the output `error: The operation failed
> (0x12345), context: While reading the 7'th item` but this is slightly
> different from what was being printed before.
>
> I didn't actually try this approach and see if anything broke, because
> Windows runs much fewer tests than the rest of LLDB, so even if my test suite
> passed, it wouldn't guarantee that another test somewhere else wasn't relying
> on the message being exactly as it currently prints.
I doubt anything is depending on the exact string printed to the log. We should
just make the new output makes sense.
I'd format this message like this:
`LLDB_LOG(log, "Reading the {0}'th item: {1}", 7, error)`
which should give you something like:
`Reading 7th item: Too many open files.`
if you want, we can add the "error:" prefix, numeric error code, or something
to the format provider,, but this would be enough for me.
https://reviews.llvm.org/D29514
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