[swift-build-dev] [SwiftPM] [swift-build] Question about invalid module name error

[Martha JP]

Hi, Daniel

Thank you for the quick reply.

I'm really sorry I couldn't explain it well.
If I had to say, I think it is the latter (just whether we should diagnose
it earlier).


# In other words

I don't think this name should be valid. (e.g. "20160412")
Just I'd like to know why this name is invalid.


> It is an invalid "C99 Extended Identifier", which is the technical
specification these names need to follow (a digit is not a valid initial
character).

Thanks for telling me. It is what I'd like to know.


# Details

I had created a package named "20160412" with `$ swift build --init`.
It had been succeed, but an error had occured when running '$ swift build'.

I had understood it needs to follow called "C99", but I didn't know about
"C99". Also, I didn't know why this name is invalid.
I don't think it should be valid.


# Sammary

"20160412" is not valid because a digit is not a valid initial character.
"t20160412" is valid name.
"2t0160412" is not valid, but it has been buildable. Because it has renamed
"t0160412".


Best regards,
JPMartha


2016-04-15 0:54 GMT+09:00 Daniel Dunbar <daniel_dunbar at apple.com>:

> Hi JPMartha,
>
> I am not 100% sure what your question is. Is it whether this name should
> be valid, or just whether we should diagnose it earlier?
>
> It is an invalid "C99 Extended Identifier", which is the technical
> specification these names need to follow (a digit is not a valid initial
> character).
>
>  - Daniel
>
> On Apr 13, 2016, at 10:56 PM, Martha JP via swift-build-dev <
> swift-build-dev at swift.org> wrote:
>
> Hi, I'm JPMartha.
>
> Can I ask about module name?
>
> The following error has occured when package's name or module's name
> consists of figures only. Is it invalid as the error message says?
>
> Error:
> ```
> fatal error: Invalid module name: file
> /Users/buildnode/jenkins/workspace/oss-swift-package-osx/swiftpm/Sources/PackageType/c99name().swift,
> line 202
> ```
>
> I saw `Sources/PackageType/c99name().swift`, then I found the following
> document.
>
> /**
>  Removes characters from name that are invalid in C99 module-names.
> */
>
> So, I checked C99. Also, I saw the API Design Guideline and the
> swift-build-dev Archives.
> But I'm not sure that it is invalid.
>
> Even though I miss a naming rule, I think this error should been prevented
> beforehand.
> So, I reported https://bugs.swift.org/browse/SR-1224.
>
> Best regards,
> JPMartha
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> swift-build-dev at swift.org
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>
>
>
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