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3.4.7 ‘def-file-line’ - get a definition file+line number

Usage: (def-file-line ag-name [ msg-fmt ])
Returns the file and line number of a AutoGen defined value, using either the default format, "from %s line %d", or else the format you supply. For example, if you want to insert a "C" language file-line directive, you would supply the format "# %2$d \"%1$s\"", but that is also already supplied with the scheme variable See section format file info as, “#line nn "file". You may use it thus:

(def-file-line "ag-def-name" c-file-line-fmt)

It is also safe to use the formatting string, "%2$d". AutoGen uses an argument vector version of printf: See section Replacement for Stdio Formatting Library.

ag-name - name of AutoGen value
msg-fmt - Optional - formatting for line message

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