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These two functions provide a mechanism for converting the rather obscure (but highly compact) representation of source locations into an actual source form:
This function returns the file position of each top-level form as a
vector if debug-source is from a :file
. If
debug-source-from
is :lisp
or :stream
, or the file
is byte-compiled, then the result is nil
.
This function returns a table mapping form numbers (see
code-location-form-number
) to source-paths. A source-path
indicates a descent into the top-level-form form, going
directly to the subform corresponding to a form number.
tlf-number is the top-level-form number of form.
This function returns the subform of form indicated by the
source-path. Form is a top-level form, and path is a
source-path into it. Context is the number of enclosing forms
to return instead of directly returning the source-path form. When
context is non-zero, the form returned contains a marker,
#:****HERE****
, immediately before the form indicated by
path.
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