Hi,
I am trying to wrap some logging procedures into macros. I have a logger
for my application which I define as:
(define-logger sap)
Then I want to define a macro that possibly receives an extra argument
which is the part of the application that's issuing the logging message.
So, if logging from parser, the message would be something like:
sap:parser: msg...
So, I have:
(define-syntax (lt/log stx)
(syntax-case stx (quote)
[(_ (quote component) (quote level) msg v ...)
(with-syntax ([name (datum->syntax stx
(format "log-sap-~a" (quote
(syntax->datum #'level))))])
#'(name (format (string-append (symbol->string (quote component))
": "
msg)
v ...)))]
[(_ (quote level) msg v ...)
(with-syntax ([name (datum->syntax stx
(format "log-sap-~a" (quote
(syntax->datum #'level))))])
#'(name (format msg v ...)))]))
The reason I am using (quote component) and (quote level) in the
template is because if I don't, then I get all sorts of issues with
messages being matched to the wrong syntax case template.
On the other hand, with this kind of macro the with-syntax doesn't seem
to be working so well when doing (format "log-sap-~a" (quote
(syntax->datum #'level))) because of the whole mess I created in the
template with the quote.
How can I properly write this macro such that it's properly matching the
arguments?
kind regards,
--
Paulo Matos
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