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* eval.c (scm_definedp): Incompatibly changed to be a builtin

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Scheme function, instead of syntax. Single argument is now a
symbol.
This commit is contained in:
Marius Vollmer 1996-11-27 13:22:58 +00:00
parent 935aa279f6
commit ee33f8faed
1 changed files with 15 additions and 15 deletions
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30
libguile/eval.c
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@ -1664,7 +1664,6 @@ dispatch:
RETURN (SCM_UNSPECIFIED);
/* new syntactic forms go here. */
case (127 & SCM_MAKISYM (0)):
proc = SCM_CAR (x);
@ -2830,21 +2829,24 @@ scm_macro_eval_x (exp, env)
}
SCM_PROC (s_definedp, "defined?", 1, 0, 0, scm_definedp);
SCM
scm_definedp (x, env)
SCM x;
SCM env;
scm_definedp (sym)
SCM sym;
{
SCM proc = SCM_CAR (x = SCM_CDR (x));
if (SCM_ISYMP (proc))
SCM vcell;
if (SCM_ISYMP (sym))
return SCM_BOOL_T;
else if(SCM_IMP(proc) || !SCM_SYMBOLP(proc))
return SCM_BOOL_F;
else
{
SCM vcell = scm_sym2vcell(proc, env_top_level(env), SCM_BOOL_F);
return (vcell == SCM_BOOL_F || SCM_UNBNDP(SCM_CDR(vcell))) ? SCM_BOOL_F : SCM_BOOL_T;
}
SCM_ASSERT (SCM_NIMP (sym) && SCM_SYMBOLP (sym), sym, SCM_ARG1, s_definedp);
vcell = scm_sym2vcell(sym,
SCM_CDR (scm_top_level_lookup_thunk_var),
SCM_BOOL_F);
return (vcell == SCM_BOOL_F || SCM_UNBNDP(SCM_CDR(vcell))) ?
SCM_BOOL_F : SCM_BOOL_T;
}
static scm_smobfuns promsmob =
@ -2923,8 +2925,6 @@ scm_init_eval ()
scm_i_atcall_cc = scm_make_synt ("@call-with-current-continuation",
scm_makmmacro, scm_m_cont);
scm_make_synt ("defined?", scm_makmmacro, scm_definedp);
#ifdef DEBUG_EXTENSIONS
scm_i_enter_frame = SCM_CAR (scm_sysintern ("enter-frame", SCM_UNDEFINED));
scm_i_apply_frame = SCM_CAR (scm_sysintern ("apply-frame", SCM_UNDEFINED));