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Add SCM_F_DYNSTACK_PROMPT_PUSH_NARGS prompt flag

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* libguile/dynstack.h (scm_t_dynstack_prompt_flags): New flag,
  SCM_F_DYNSTACK_PROMPT_PUSH_NARGS, set if the continuation expects the
  number of args to be pushed on the top of the stack.

* libguile/control.c (scm_c_abort): Only push nargs if requested.

* libguile/eval.c (eval):
* libguile/throw.c (pre_init_catch):
* libguile/vm-i-system.c (prompt): Set
  SCM_F_DYNSTACK_PROMPT_PUSH_NARGS.
This commit is contained in:
Andy Wingo 2013-10-14 16:05:45 +02:00
parent b7f10defe6
commit c6cd692f08
5 changed files with 9 additions and 4 deletions
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3
libguile/throw.c
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@ -474,7 +474,8 @@ pre_init_catch (SCM tag, SCM thunk, SCM handler, SCM pre_unwind_handler)
/* Push the prompt onto the dynamic stack. */
scm_dynstack_push_prompt (dynstack,
SCM_F_DYNSTACK_PROMPT_ESCAPE_ONLY,
SCM_F_DYNSTACK_PROMPT_ESCAPE_ONLY
| SCM_F_DYNSTACK_PROMPT_PUSH_NARGS,
sym_pre_init_catch_tag,
SCM_VM_DATA (vm)->fp,
SCM_VM_DATA (vm)->sp,