Syntax
#(%procedure.source) #(%procedure.offset)
%procedure is any procedure.
source returns the %filename argument to proc, if any. offset returns the %offset argument to proc. Using tintc or tint.compile will set this information for each procedure compiled as well.
Example
#(proc,a-procedure,(#(+,1,2,3,4)),filename,123) #(a-procedure.source) filename #(a-procedure.offset) 123