locate f -- for a symbol interpreted function
f returns a sequence
(n,i,c,j,d) describing the location of the definition in the source code. The name of the source file is
n and the code is occupies line
i column
c through line
j column
d. If the
f is compiled, then the location is not available, and
null is returned.
If
f is a sequence, then
lookup is applied first, and then the location of the resulting function is provided.
If
f is
null, then
null is returned.