-decl_type *init_decl_type(token_t type, const char *name);
-void free_decl_type(decl_type *type);
-void dump_decl_type(int fd, decl_type *t, unsigned level);
+struct psi_decl_type *psi_decl_type_init(token_t type, zend_string *name);
+struct psi_decl_type *psi_decl_type_copy(struct psi_decl_type *src);
+void psi_decl_type_free(struct psi_decl_type **type_ptr);
+void psi_decl_type_dump(int fd, struct psi_decl_type *t, unsigned level);
+bool psi_decl_type_validate(struct psi_data *data, struct psi_decl_type *type,
+ struct psi_decl_arg *def, struct psi_validate_scope *scope);