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add with-fluids objects and primitive syntax

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* libguile/tags.h (scm_tc7_with_fluids): Allocate a tc7 for
  "with-fluids" objects, which will only live on the dynamic stack (wind
  list), not in normal scheme-land.

* libguile/fluids.h (SCM_WITH_FLUIDS_P, SCM_WITH_FLUIDS_LEN)
  (SCM_WITH_FLUIDS_NTH_FLUID, SCM_WITH_FLUIDS_NTH_VAL)
  (SCM_WITH_FLUIDS_SET_NTH_VAL): Add some accessors.
* libguile/fluids.c (scm_i_make_with_fluids, scm_i_swap_with_fluids):
  New internal functions.
  (scm_c_with_fluids, scm_c_with_fluid): Push with-fluids objects on the
  dynwind list, not winders.

* libguile/dynwind.c (scm_i_dowinds): Add cases for winding and
  unwinding with-fluids objects.

* libguile/memoize.h (scm_sym_with_fluids, SCM_M_BEGIN): New public
  data.
* libguile/memoize.c (scm_m_with_fluids): Define with-fluids as a
  primitive syntax.
  (unmemoize): Add with-fluids case.

* libguile/eval.c (eval):
* module/ice-9/eval.scm (primitive-eval): Add with-fluids cases.

* test-suite/tests/fluids.test
  ("fluids not modified if nonfluid passed to with-fluids"): Enable a
  now-passing test.
This commit is contained in:
Andy Wingo 2010-02-18 17:10:29 +01:00
parent 27bd1deced
commit bb0229b51d
9 changed files with 206 additions and 61 deletions
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2
libguile/memoize.h
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@ -44,6 +44,7 @@ SCM_API SCM scm_sym_quote;
SCM_API SCM scm_sym_quasiquote;
SCM_API SCM scm_sym_unquote;
SCM_API SCM scm_sym_uq_splicing;
SCM_API SCM scm_sym_with_fluids;
SCM_API SCM scm_sym_at;
SCM_API SCM scm_sym_atat;
@ -77,6 +78,7 @@ enum
SCM_M_QUOTE,
SCM_M_DEFINE,
SCM_M_DYNWIND,
SCM_M_WITH_FLUIDS,
SCM_M_APPLY,
SCM_M_CONT,
SCM_M_CALL_WITH_VALUES,