.

lib/priv.h

@@ -96,9 +96,10 @@ void   array_append(Array* a, VALUE v);
 Table* table_new(Heap const* heap);
 void   table_destroy(Table* t);
 
-size_t table_len(Table* t);
-VALUE  table_get(Table const* t, VALUE key);
-void   table_set(Table* t, VALUE key, VALUE value);
+size_t     table_len(Table* t);
+TYC_RESULT table_get(Table const* t, VALUE key, VALUE* value);
+void       table_set(Table* t, VALUE key, VALUE value);
+void       table_del(Table* t, VALUE key);
 
 //
 // HEAP

lib/table.c

@@ -66,7 +66,7 @@ static TABLE_HASH value_hash(VALUE v)
     return 0;
 }
 
-VALUE table_get(Table const* t, VALUE key)
+TYC_RESULT table_get(Table const* t, VALUE key, VALUE* value)
 {
     if (value_type(key) == TT_STRING) {
         const char* skey;
@@ -74,16 +74,18 @@ VALUE table_get(Table const* t, VALUE key)
             abort();
         khiter_t k = kh_get(TABLE_STR, t->tbl_str, skey);
         if (k == kh_end(t->tbl_str))
-            __builtin_unreachable();
-        return kh_value(t->tbl_str, k);
+            return T_ERR_TABLE_KEY_NOT_FOUND;
+        *value = kh_value(t->tbl_str, k);
 
     } else {
         TABLE_HASH hash = value_hash(key);
         khiter_t k = kh_get(TABLE_INT, t->tbl_int, hash);
         if (k == kh_end(t->tbl_int))
-            __builtin_unreachable();
-        return kh_value(t->tbl_int, k);
+            return T_ERR_TABLE_KEY_NOT_FOUND;
+        *value = kh_value(t->tbl_int, k);
     }
+
+    return T_OK;
 }
 
 void table_set(Table* t, VALUE key, VALUE value)
@@ -107,3 +109,23 @@ void table_set(Table* t, VALUE key, VALUE value)
         kh_value(t->tbl_int, k) = value;
     }
 }
+
+void table_del(Table* t, VALUE key)
+{
+    if (value_type(key) == TT_STRING) {
+        const char* skey;
+        if (heap_get_string(t->heap, value_idx(key), &skey) != T_OK)
+            abort();
+        khiter_t k = kh_get(TABLE_STR, t->tbl_str, skey);
+        if (k == kh_end(t->tbl_str))
+            return;
+        kh_del(TABLE_STR, t->tbl_str, k);
+
+    } else {
+        TABLE_HASH hash = value_hash(key);
+        khiter_t k = kh_get(TABLE_INT, t->tbl_int, hash);
+        if (k == kh_end(t->tbl_int))
+            return;
+        kh_del(TABLE_INT, t->tbl_int, k);
+    }
+}

lib/tyche.h

@@ -9,6 +9,7 @@ typedef enum {
     T_OK = 0,
     T_ERR_STACK_UNDERFLOW = -1, T_ERR_STACK_FP_UNDERFLOW = -2, T_ERR_STACK_ACCESS_OUT_OF_RANGE = -3,
     T_ERR_HEAP_KEY_NOT_FOUND = -10,
+    T_ERR_TABLE_KEY_NOT_FOUND = -20,
 } TYC_RESULT;
 
 #endif //TYCHE_TYCHE_H