error-catching-loop.
Don't set 'throw-handler-default property on error keys.
Just interpret (almost) any throw with 4 args as an error throw.
Delete some try-load stuff that was already commented out.
from scm_sys_try_load and scm_sys_try_load_path. The Scheme name
of scm_primitive_load_path was also changed to
"primitive-load-path", from "%try-load-path". Callers changed.
We'd like to respect the convention that a function named
"try-mumble" should behave just like the function called "mumble",
but return #f instead of signalling some error.
* load.h: Rename prototypes.
the print state representation: Don't use a tail array for
recording of circular references. Resizing of the print state
structure invalidates the print state pointer. To avoid passing
around an indirect print state reference to all printing
functions, we instead let the print state reference a resizable
vector.
required by the tagging system.
* struct.c (alloc_struct): New function.
(scm_make_struct, scm_make_vtable_vtable): Call it.
* struct.h (scm_struct_n_extra_words): Bump to 3.
(scm_struct_i_ptr): New "field".
* gc.c (scm_gc_sweep): When we need to free the data, use the
information stored by alloc_struct to find the beginning of the
block allocated to the structure, so we can free it.
handle-system-error): Backtracing now works for signals aswell;
Backtracing mechanism can now identify the stack root created by
start-stack so that the user isn't exposed to system stack frames.
(scm_m_define): Record names of all kinds of procedure
objects. (Earlier, only closures were recorded.)
* gsubr.c: Added global scm_i_name. Added #include "procprop.h".
(scm_make_gsubr): Record names of compiled closures.
throw-handler-default.
((handle-system-error key . arg-list)): Changed the way errors are
reported.
((scm-style-repl)): Wrap up the call to eval in a start-stack
acro.
((error-catching-loop thunk)): Introduce a lazy-catch into
error-catching-loop so that the stack can be captured.
(scm_boot_guile_1): Added calls to scm_init_backtrace and
scm_init_stacks.
* Makefile.in: Added entries for new files: backtrace.c,
backtrace.h, stacks.c and stacks.h.
s_set_source_property_x): Check that first argument is a pair or a
memoized object.
* srcprop.c, srcprop.h: Made scm_i_filename, scm_i_copy,
scm_i_line, scm_i_column and scm_i_breakpoint global.
returning it to pool. It is better to do it here than in
scm_prin1 since scm_prin1 is called often.
* print.c (make_print_state): Bugfix: Initialize pstate->ceiling.
* print.c: New functions: scm_make_print_state,
scm_free_print_state.
