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3cf4ca187c
The goal was that, as part of a print operation, all nested prints of
contained data would be able to use the same parameters (e.g. write or
not), and also detect cycles, highlight objects, etc. The mechanism was
a heap-allocated data structure. However, given that:
1. Nobody accessed print states from Scheme
2. `write` and `display` should move to Scheme anyway, in order to be
suspendable
3. The "fancyp" and "highlight" options were unused
4. A simple stack-allocated data structure with a per-thread key could
do the trick just as well, without needing the weird freelist
structure
5. Ports-with-print-states were a source of bugs
In the end we switch print states to be something completely internal to
print.c. There are no more SCM print-state objects, and no more
ports-with-print-state.
* libguile/print.h: Remove print state from API.
* libguile/print.c (struct scm_print_state): Move definition here.
(scm_print_opts): Remove "highlight-prefix" and "highlight-suffix"
options, as they were not used.
(ENTER_NESTED_DATA): Remove "fancyp" case.
(init_print_state_key, get_print_state, push_print_state)
(maybe_push_print_state, pop_print_state): New facility to manage stack
of active print states.
(scm_iprin1, print_vector): No more fancyp.
(iprin1): Access "writingp" member directly. Don't make ports with
print states.
(scm_prin1): Manage print state stack.
(scm_iprlist): No more fancyp.
(scm_valid_oport_value_p): Remove; valid outports are SCM_OPOUTPORTP.
* libguile/backtrace.c:
* libguile/filesys.c:
* libguile/fports.c:
* libguile/goops.c:
* libguile/ioext.c:
* libguile/ports.c:
* libguile/posix.c:
* libguile/promises.c:
* libguile/socket.c:
* libguile/struct.c: Remove cases that dealt with
ports-with-print-states.
* libguile/private-options.h: Remove highlight options.
* module/ice-9/ports.scm (inherit-print-state): Deprecate.
* libguile/deprecated.c:
* libguile/deprecated.h: Add deprecation shims for print states, as far
as that is possible.
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| .. | ||
| ice-9 | ||
| language | ||
| oop | ||
| rnrs | ||
| scheme | ||
| scripts | ||
| srfi | ||
| sxml | ||
| system | ||
| texinfo | ||
| web | ||
| Makefile.am | ||
| rnrs.scm | ||
| statprof.scm | ||
| texinfo.scm | ||