[jira] [Resolved] (LOGCXX-515) Add macros to utilize libfmt formatting for messages

["Robert Middleton (Jira)" <lo...@logging.apache.org>]

     [ https://issues.apache.org/jira/browse/LOGCXX-515?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Middleton resolved LOGCXX-515.
-------------------------------------
    Resolution: Fixed

> Add macros to utilize libfmt formatting for messages
> ----------------------------------------------------
>
>                 Key: LOGCXX-515
>                 URL: https://issues.apache.org/jira/browse/LOGCXX-515
>             Project: Log4cxx
>          Issue Type: New Feature
>            Reporter: Robert Middleton
>            Assignee: Robert Middleton
>            Priority: Major
>             Fix For: 0.12.0
>
>
> Create macros that use fmt::format to create the log message.
>  
> The prototype looks like this:
> {code:java}
> #define LOG4CXX_INFO_FMT(logger, ...) do { \
> 		if (logger->isInfoEnabled()) {\
> 			logger->forcedLog(::log4cxx::Level::getInfo(), fmt::format( __VA_ARGS__ ), LOG4CXX_LOCATION); }} while (0)
> {code}
> Usage:
> {code:java}
> LOG4CXX_INFO_FMT( logger, "This is a message that has some kind of {} information in it", "useful" );
> {code}
> This is slightly faster at runtime than using the MessageBuffer class with operator<< all the time, and much clearer.  Conveniently, the coloring provided by libfmt also shows up on the output.
>  
> is there a better name than LOG4CXX_INFO_FMT?



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