3.4.55 tpl-file-line - get the template file+line number

Usage: (tpl-file-line [ msg-fmt ])
Returns the file and line number of the current template macro 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 format file info as, “#line nn "file"”. You may use it thus:

(tpl-file-line c-file-line-fmt)

It is also safe to use the formatting string, "%2$d". AutoGen uses an argument vector version of printf: See Replacement for Stdio Formatting Library, and it does not need to know the types of each argument in order to skip forward to the second argument.

Arguments:
msg-fmt - Optional - formatting for line message