diff --git a/intrin.cpp b/intrin.cpp
index c4f3e3b..13c382a 100644
--- a/intrin.cpp
+++ b/intrin.cpp
@@ -2008,51 +2008,45 @@ static void intrin_error(intrin_t *intrin, const char *fmt, ...) {
 
 /* exposed */
 intrin_t *intrin_init(parser_t *parser) {
-    intrin_t *intrin = (intrin_t*)mem_a(sizeof(intrin_t));
-    size_t    i;
+    intrin_t *intrin = new intrin_t;
 
-    intrin->parser     = parser;
-    intrin->fold       = parser->fold;
-    intrin->intrinsics = NULL;
-    intrin->generated  = NULL;
+    intrin->parser = parser;
+    intrin->fold = parser->fold;
 
-    vec_append(intrin->intrinsics, GMQCC_ARRAY_COUNT(intrinsics), intrinsics);
-
-    /* populate with null pointers for tracking generation */
-    for (i = 0; i < GMQCC_ARRAY_COUNT(intrinsics); i++)
-        vec_push(intrin->generated, NULL);
+    for (auto &it : intrinsics) {
+        intrin->intrinsics.push_back(it);
+        intrin->generated.push_back(nullptr);
+    }
 
     return intrin;
 }
 
 void intrin_cleanup(intrin_t *intrin) {
-    vec_free(intrin->intrinsics);
-    vec_free(intrin->generated);
-    mem_d(intrin);
+    delete intrin;
 }
 
 ast_expression *intrin_fold(intrin_t *intrin, ast_value *value, ast_expression **exprs) {
-    size_t i;
     if (!value || !value->name)
         return NULL;
-    for (i = 0; i < vec_size(intrin->intrinsics); i++)
-        if (!strcmp(value->name, intrin->intrinsics[i].name))
-            return (vec_size(exprs) != intrin->intrinsics[i].args)
+    for (auto &it : intrin->intrinsics) {
+        if (!strcmp(value->name, it.name))
+            return (vec_size(exprs) != it.args)
                         ? NULL
                         : fold_intrin(intrin->fold, value->name + 10, exprs);
+    }
     return NULL;
 }
 
 static GMQCC_INLINE ast_expression *intrin_func_try(intrin_t *intrin, size_t offset, const char *compare) {
-    size_t i;
-    for (i = 0; i < vec_size(intrin->intrinsics); i++) {
-        if (strcmp(*(char **)((char *)&intrin->intrinsics[i] + offset), compare))
+    for (auto &it : intrin->intrinsics) {
+        const size_t index = &it - &intrin->intrinsics[0];
+        if (strcmp(*(char **)((char *)&it + offset), compare))
             continue;
-        if (intrin->generated[i])
-            return intrin->generated[i];
-        return intrin->generated[i] = intrin->intrinsics[i].intrin(intrin);
+        if (intrin->generated[index])
+            return intrin->generated[index];
+        return intrin->generated[index] = it.intrin(intrin);
     }
-    return NULL;
+    return nullptr;
 }
 
 static ast_expression *intrin_func_self(intrin_t *intrin, const char *name, const char *from) {
diff --git a/parser.h b/parser.h
index 8607e5c..2393fce 100644
--- a/parser.h
+++ b/parser.h
@@ -24,10 +24,10 @@ struct intrin_func_t {
 };
 
 struct intrin_t {
-    intrin_func_t  *intrinsics;              /* vector<intrin_func_t>   */
-    ast_expression **generated;              /* vector<ast_expression*> */
-    parser_t       *parser;
-    fold_t         *fold;
+    std::vector<intrin_func_t> intrinsics;
+    std::vector<ast_expression*> generated;
+    parser_t *parser;
+    fold_t *fold;
 };
 
 #define parser_ctx(p) ((p)->lex->tok.ctx)