[EMAIL PROTECTED] (Ludovic Courtès) writes:
> If you want to use source locations in a Guile-friendly way (so that
> Guile can, for instance, display location information in
> backtraces), then you may want to use `scm_set_source_property_x
> (sexp, key, datum)' (where KEY may be one of SCM_SYM_FILENAME,
> SCM_SYM_LINE, SCM_SYM_COLUMN) which is defined in `srcprop.h'.
I think this is probably more along the lines of what he wants, but is
the above going to work correctly if there are multiple lines of
Scheme code? For example:
[This is an example ]
(do-something (foo) (bar))
(let ((baz bax))
(do-something-else baz)
(more-stuff baz)
(and-even-more baz))
[ ...with several lines of embedded Scheme code. ]
If I'm guesssing correctly about how scm_set_source_property_x works
(I haven't used it), then it seems like it might be a lot of work to
turn the above lines of Scheme code into a properly filename, line
(and column?) annotated set of forms.
If so, then I wondered if it might be possible to just implement the
function mentioned originally
i.e. ag_scm_c_eval_string_from_file_line, and here's what I came up
with. Note that I have no idea if this will actually work; I haven't
tested it, and I don't know the semantics of the port related
filename, line, and column bits offhand.
(define (eval-port port)
;; See strports.c inner_eval_string for similar code.
(let loop ((next-form (read port))
(any-read? #f)
(result #f))
(if (eof-object? next-form)
(if any-read? result)
(loop (read port)
#t
(primitive-eval next-form)))))
(define (eval-string-from-file str filename line column)
(call-with-input-string str
(lambda (port)
(set-port-filename! port filename)
(set-port-line! port line)
(set-port-column! port column)
(eval-port port))))
--
Rob Browning
rlb @defaultvalue.org and @debian.org; previously @cs.utexas.edu
GPG starting 2002-11-03 = 14DD 432F AE39 534D B592 F9A0 25C8 D377 8C7E 73A4
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