late Proposal: Add C-like preprocessing ability for java language.

[rssh at gradsoft.com.ua]

> Hmm the preprocessor is a very powerful tool.
> But IIRC (back in the '90s) wasn't one of the initial design goals
> (strength?) of Java to never have a C like preprocessor? Can it be
> changed now?
>

 As I remeber, the initial design goal of Java was be language for writing
applets (embeddable client-side dynamic content on web pages). Is this
changed now ?


> 2009/3/31  <rssh at gradsoft.com.ua>:
>> Sorry for late, but I was waiting for stars be in correct location for
>> sending this.
>>
>> OVERVIEW:
>>
>> ═FEATURE SUMMARY:
>>
>> Add C-like preproceeding ability to Java language.
>>
>> ═MAJOR ADVANTAGE:
>>
>> ═ Possibility implements language extensions, such as
>> sugaring/desugaring,
>> koffein/dekoffein outside of Sun, fix bugs 4411102, 6439965, 4649007 and
>> many
>> others from sun bugs database and increase team building importance for
>> Java
>> programmers by providing ability to any engineer tune life of all team
>> in
>> night ware. Of course, this possibility exists in current version of
>> JAVA,
>> but it's too rare used.
>> Often rewriting of software system from scratch will speed-up economics,
>> which is important for faster recovery from crisis.
>>
>> ═MAJOR DISADVANTAGE
>> ═ Inaccurate usage of this feature can cause producing of unmaintainable
>> code.
>>
>> ═ALTERNATIVES:
>>
>> ═ Use external preprocessing tool.
>>
>> EXAMPLES
>>
>> SIMPLE EXAMPLE:
>>
>> ═System.out.println("file is %s, line is %d\n ",__FILE__,__LINE__);
>>
>> ADVANCED EXAMPLE:
>>
>> ARM Proposal can be implemented on user level without language changes.
>>
>> #define TRY(xt,x,y,z) xt x=null; try{ ═ ═ ═\
>> ═ ═ ═ ═ ═ ═ ═ ═ ═ ═ ═x=y ; ═ \
>> ═ ═ ═ ═ ═ ═ ═ ═ ═ ═ ═z ; ═ ═ \
>> ═ ═ ═ ═ ═ ═ ═ ═ ═ ═} finally { \
>> ═ ═ ═ ═ ═ ═ ═ ═ ═ ═ ═x.close() \
>> ═ ═ ═ ═ ═ ═ ═ ═ ═ ═} \
>>
>>
>>
>> TRY(sqlConnection, cn, dataSource.getConnection(), \
>> ═ ═ ═RecordSet rs = \
>> ═ ═ ═ cn.evaluateQuery("select * from customers where id=:x"\,2); \
>> ═ ═ ═while(rs.next()) { printRow(rs); } )
>>
>> will be desugared as
>> sqlConnection cn=null; try{
>> ═cn = dataSource.getConnection();
>> ═RecordSet rs =
>> ═ ═ ═ cn.evaluateQuery("select * from customers where id=:x",2);
>> ═ ═ ═while(rs.next()) { printRow(rs); }
>> ═}finally{
>> ═ ═cn.close();
>> ═}
>>
>>
>> DETAILS:
>>
>> ═No details required.
>>
>>
>> COMPILATION:
>>
>> ═No changes to compiler required, all is do on preprocessor level.
>>
>> TESTING:
>>
>> ═We can reuse tested implelementation of C preporcessor.
>>
>> LIBRARY SUPPORT:
>>
>> ═It would be good add gcc distribution to java.
>>
>> REFLECTIVE APIS: None
>>
>> OTHER CHANGES: None
>>
>> MIGRATION: None
>>
>> COMPABILITY
>> ═None
>>
>>
>> REFERENCES
>>
>> ═http://bugs.sun.com/view_bug.do?bug_id=4165111
>> ═http://bugs.sun.com/view_bug.do?bug_id=4087771
>> ═http://bugs.sun.com/view_bug.do?bug_id=4615070
>> ═http://bugs.sun.com/view_bug.do?bug_id=4215781
>>
>> IMPLEMENTATION PROTOTYPE URL
>>
>> See http://gcc.gnu.org
>> Also exists java-only solutions for embedding
>> http://www.duo-creative.com/chrisb/jpp/
>>
>>
>>
>>
>>
>>
>>
>>
>