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Re: Is You Is Or Is You Ain't A Literal?

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  Re: Is You Is Or Is You Ain't A Literal? Arne Vajhøj <arne@vajhoej.dk> - 2016-10-05 20:21 -0400

#35730 — Re: Is You Is Or Is You Ain't A Literal?

On 10/5/2016 5:30 PM, Stefan Ram wrote:
>   Is »2« a literal?
>
>   I think JLS 3.10.1 says "yes".
>
>   But there also is a test method:
>
> javax.lang.model
>
> Enum SourceVersion
>
> public static boolean isKeyword( java.lang.CharSequence s )
>
> Returns whether or not s is a keyword or literal in the latest
> source version.
>
> Parameters: s - the string to check
>
> Returns: true if s is a keyword or literal, false otherwise.
>
>   So,
>
> public final class Main
> { public static void main( final java.lang.String args[] )
>   { java.lang.System.out.println
>     ( javax.lang.model.SourceVersion.isKeyword( "2" )); }}
>
> false
>
>   So, »2« is not a literal?

2 is a literal.

The documentation is bad/misleading.

A quick glance in the source code reveals what "or literal"
means.

It is only the 3 "name like" literals: null, true and false.

Arne

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