[
http://jira.codehaus.org/browse/QDOX-185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=268653#action_268653
]
Robert Scholte commented on QDOX-185:
-------------------------------------
First part done in [rev.
1244|http://fisheye.codehaus.org/changelog/qdox/?cs=1244]
There's a newer version of the specs, although still informative
http://cr.openjdk.java.net/~darcy/ProjectCoin/ProjectCoin-Documentation-v0.83.html#literals
> Support Underscores in Numbers (java7)
> --------------------------------------
>
> Key: QDOX-185
> URL: http://jira.codehaus.org/browse/QDOX-185
> Project: QDox
> Issue Type: Improvement
> Components: Parser
> Reporter: Robert Scholte
> Assignee: Robert Scholte
> Priority: Minor
>
> For details see
> http://mail.openjdk.java.net/pipermail/coin-dev/2009-April/001628.html
> Some examples:
> {code}
> long creditCardNumber = 1234_5678_9012_3456L;
> long socialSecurityNumbers = 999_99_9999L;
> float monetaryAmount = 12_345_132.12;
> long hexBytes = 0xFF_EC_DE_5E;
> long hexWords = 0xFFEC_DE5E;
> long maxLong = 0x7fff_ffff_ffff_ffffL;
> long alsoMaxLong = 9_223_372_036_854_775_807L;
> double whyWouldYouEverDoThis = 0x1_.ffff_ffff_ffff_fp10_23;
> // Additionally, if binary literals are ever added to the Java language, the
> following might also be possible...
> byte nybbles = 0b0010_0101;
> long bytes = 0b11010010_01101001_10010100_10010010;
> int weirdBitfields = 0b000_10_101;
> // Note that according to this proposal, underscores can only be placed
> between digits. They cannot be placed by themselves in positions where a
> string of digits would normally be expected:
> int x1 = _52; // This is an identifier, not a numeric literal.
> int x2 = 5_2; // OK. (Decimal literal)
> int x2 = 52_; // Illegal. (Underscores must always be between digits)
> int x3 = 5_______2; // OK. (Decimal literal.)
> int x4 = 0_x52; // Illegal. Can't put underscores in the "0x" radix prefix.
> int x5 = 0x_52; // Illegal. (Underscores must always be between digits)
> int x6 = 0x5_2; // OK. (Hexadecimal literal)
> int x6 = 0x52_; // Illegal. (Underscores must always be between digits)
> int x6 = 0x_; // Illegal. (Not valid with the underscore removed)
> int x7 = 0_52; // OK. (Octal literal)
> int x7 = 05_2; // OK. (Octal literal)
> int x8 = 052_; // Illegal. (Underscores must always be between digits)
> {code}
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://jira.codehaus.org/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
---------------------------------------------------------------------
To unsubscribe from this list, please visit:
http://xircles.codehaus.org/manage_email
