Add a parse type struct, used to hold type data as it is parsed.

src/parsetype.c

@@ -0,0 +1,18 @@
+#include "parsetype.h"
+#include <stdlib.h>
+
+int _foreach_free_child(void* data, va_list args) {
+    libab_parsetype_free_recursive(data);
+    return 0;
+}
+void libab_parsetype_free(libab_parsetype* type) {
+    free(type->name);
+}
+void libab_parsetype_free_recursive(libab_parsetype* type) {
+    if(type->variant == PT_PARENT) {
+        vec_foreach(&(type->children), NULL, compare_always, _foreach_free_child);
+        vec_free(&(type->children));
+    }
+    libab_parsetype_free(type);
+    free(type);
+}