Function hash

imperative/src/impl/ops/utility.cpp:224–227

}

auto hash(const OpDef& def) {
    auto& op = def.cast_final_safe<ShapeInfer>();
    return op.op->hash();
}

auto is_same_st(const OpDef& def, const OpDef& another) {
    if (!another.same_type<ShapeInfer>()) {