Fcalva/chibi-scheme
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making syntactic closure free variable handling agree with mit-scheme

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This commit is contained in:
Alex Shinn 2016-02-27 16:06:20 +09:00
parent 36651c4115
commit 207ae1f24e
2 changed files with 24 additions and 10 deletions
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33
eval.c
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@ -93,19 +93,25 @@ static sexp sexp_env_cell_loc1 (sexp env, sexp key, int localp, sexp *varenv) {
if (varenv) *varenv = env;
return ls;
}
env = (localp ? NULL : sexp_env_parent(env));
if (localp) break;
env = sexp_env_parent(env);
} while (env && sexp_envp(env));
return NULL;
}
static sexp sexp_env_cell_loc (sexp ctx, sexp env, sexp key, int localp, sexp *varenv) {
sexp cell = sexp_env_cell_loc1(env, key, localp, varenv);
sexp cell, ls = sexp_vectorp(sexp_context_specific(ctx)) ? sexp_memq(ctx, sexp_id_name(key), sexp_context_fv(ctx)) : SEXP_NULL;
for ( ; sexp_pairp(ls); ls=sexp_cdr(ls))
if (sexp_envp(sexp_car(ls))) {
env = sexp_car(ls);
break;
}
cell = sexp_env_cell_loc1(env, key, localp, varenv);
while (!cell && key && sexp_synclop(key)) {
if (sexp_not(sexp_memq(ctx, sexp_synclo_expr(key), sexp_context_fv(ctx)))
&& sexp_not(sexp_memq(ctx, sexp_synclo_expr(key), sexp_synclo_free_vars(key))))
if (!sexp_pairp(ls) && sexp_not(sexp_memq(ctx, sexp_synclo_expr(key), sexp_synclo_free_vars(key))))
env = sexp_synclo_env(key);
key = sexp_synclo_expr(key);
cell = sexp_env_cell_loc1(env, key, 0, varenv);
cell = sexp_env_cell_loc1(env, key, localp, varenv);
}
return cell;
}
@ -568,9 +574,13 @@ sexp sexp_make_child_context (sexp ctx, sexp lambda) {
/**************************** identifiers *****************************/
int sexp_idp (sexp x) {
sexp sexp_id_name (sexp x) {
while (sexp_synclop(x)) x = sexp_synclo_expr(x);
return sexp_symbolp(x);
return x;
}
int sexp_idp (sexp x) {
return sexp_symbolp(sexp_id_name(x));
}
sexp sexp_identifierp_op (sexp ctx, sexp self, sexp_sint_t n, sexp x) {
@ -1055,9 +1065,12 @@ static sexp analyze (sexp ctx, sexp object, int depth, int defok) {
res = analyze_var_ref(ctx, x, NULL);
} else if (sexp_synclop(x)) {
tmp = sexp_make_child_context(ctx, sexp_context_lambda(ctx));
sexp_context_fv(tmp) = sexp_append2(tmp,
sexp_synclo_free_vars(x),
sexp_context_fv(tmp));
if (sexp_pairp(sexp_synclo_free_vars(x))) {
sexp_push(ctx, sexp_context_fv(tmp), sexp_context_env(ctx));
sexp_context_fv(tmp) = sexp_append2(tmp,
sexp_synclo_free_vars(x),
sexp_context_fv(tmp));
}
sexp_context_env(tmp) = sexp_extend_synclo_env(tmp, sexp_synclo_env(x));
x = sexp_synclo_expr(x);
res = analyze(tmp, x, depth, defok);

1
include/chibi/sexp.h
View file

@ -753,6 +753,7 @@ sexp sexp_make_flonum(sexp ctx, double f);
#define sexp_symbolp(x) (sexp_lsymbolp(x))
#endif
SEXP_API sexp sexp_id_name(sexp x);
SEXP_API int sexp_idp(sexp x);
#define sexp_portp(x) (sexp_check_tag(x, SEXP_IPORT) || sexp_check_tag(x, SEXP_OPORT))