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Always push a new env cell on define unless the previous cell was undefined.

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This commit is contained in:
Alex Shinn 2015-09-13 21:49:58 +09:00
parent da845032e5
commit 7c333f43da
1 changed files with 2 additions and 3 deletions
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5
eval.c
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@ -141,9 +141,8 @@ sexp sexp_env_cell_define (sexp ctx, sexp env, sexp key,
}
#endif
for (ls=sexp_env_bindings(env); sexp_pairp(ls); ls=sexp_env_next_cell(ls))
if (sexp_car(ls) == key) {
if (sexp_cdr(ls) == SEXP_UNDEF)
sexp_cdr(ls) = value;
if (sexp_car(ls) == key && sexp_cdr(ls) == SEXP_UNDEF) {
sexp_cdr(ls) = value;
return ls;
}
sexp_gc_preserve2(ctx, cell, ls);