Re: how to know the filename, line number at the function called ?

[Mat Hostetter]

>Also I can't find it in online help, and it causes syntax error.
>so far, this example cannot seems to work and compiler complains
>it cannot recognize 'tokens'.

Yes, that example was incorrect.

Here are macros that return the current filename (as a String)
and line number (as an int).  I tested these and they work.
For example:

    {output {this-file}, ":", {this-line}}

Remember that macros (like all macros) need to go in a different
package than where they are called.


{import * from CURL.LANGUAGE.SOURCE}

{define-macro public {this-file ?empty:{pattern}}
    {return
        {Literal
            {if-non-null url = empty.url then
                url.name
             else
                "[unknown file]"
            }
        }
    }
}


{define-macro public {this-line ?empty:{pattern}}
    let line:int = {empty.location-to-line-column empty.start-location}
    {return {Literal line}}
}

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