You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: approx.rs
    path of file: ./repos/simd-json/src/numberparse
    
    the code of the file until where you have to start completion: use super::{
    is_integer, is_made_of_eight_digits_fast,
    is_not_structural_or_whitespace_or_exponent_or_decimal, parse_eight_digits_unrolled,
};
use crate::charutils::is_structural_or_whitespace;
use crate::safer_unchecked::GetSaferUnchecked;
use crate::unlikely;
use crate::StaticNode;
use crate::{static_cast_i64, Deserializer, ErrorType, Result};

const POWER_OF_TEN: [f64; 632] = [
    1e-323, 1e-322, 1e-321, 1e-320, 1e-319, 1e-318, 1e-317, 1e-316, 1e-315, 1e-314, 1e-313, 1e-312,
    1e-311, 1e-310, 1e-309, 1e-308, 1e-307, 1e-306, 1e-305, 1e-304, 1e-303, 1e-302, 1e-301, 1e-300,
    1e-299, 1e-298, 1e-297, 1e-296, 1e-295, 1e-294, 1e-293, 1e-292, 1e-291, 1e-290, 1e-289, 1e-288,
    1e-287, 1e-286, 1e-285, 1e-284, 1e-283, 1e-282, 1e-281, 1e-280, 1e-279, 1e-278, 1e-277, 1e-276,
    1e-275, 1e-274, 1e-273, 1e-272, 1e-271, 1e-270, 1e-269, 1e-268, 1e-267, 1e-266, 1e-265, 1e-264,
    1e-263, 1e-262, 1e-261, 1e-260, 1e-259, 1e-258, 1e-257, 1e-256, 1e-255, 1e-254, 1e-253, 1e-252,
    1e-251, 1e-250, 1e-249, 1e-248, 1e-247, 1e-246, 1e-245, 1e-244, 1e-243, 1e-242, 1e-241, 1e-240,
    1e-239, 1e-238, 1e-237, 1e-236, 1e-235, 1e-234, 1e-233, 1e-232, 1e-231, 1e-230, 1e-229, 1e-228,
    1e-227, 1e-226, 1e-225, 1e-224, 1e-223, 1e-222, 1e-221, 1e-220, 1e-219, 1e-218, 1e-217, 1e-216,
    1e-215, 1e-214, 1e-213,
    
    fn bad_exp() {
        let mut too_big = String::from("1e309");
        let mut too_big = unsafe { too_big.as_bytes_mut() };
        let v_too_big = to_value(&mut too_big);
        assert!(v_too_big.is_err());
        let mut too_small = String::from("1e-324");
        let mut too_small = unsafe { too_small.as_bytes_mut() };
        let v_too_small = to_value(&mut too_small);
        assert!(v_too_small.is_err());
        let mut too_big = String::from("1e1000");
        let mut too_big = unsafe { too_big.as_bytes_mut() };
        let v_too_big = to_value(&mut too_big);
        assert!(v_too_big.is_err());
        let mut too_small = String::from("1e-1000");
        let mut too_small = unsafe { too_small.as_bytes_mut() };
        let v_too_small = to_value(&mut too_small);
        assert!(v_too_small.is_err());

        let mut too_big = String::from("100000000000000000000000000000000000000000000e309");
        let mut too_big = unsafe { too_big.as_bytes_mut() };
        let v_too_big = to_value(&mut too_big);
        assert!(v_too_big.is_err());
        let mut too_small = String::from("100000000000000000000000000000000000000000000e-324");
        let mut too_small = unsafe { too_small.as_bytes_mut() };
        let v_too_small = to_value(&mut too_small);
        assert!(v_too_small.is_err());
        let mut too_big = String::from("100000000000000000000000000000000000000000000e1000");
        let mut too_big = unsafe { too_big.as_bytes_mut() };
        let v_too_big = to_value(&mut too_big);
        assert!(v_too_big.is_err());
        let mut too_small = String::from("100000000000000000000000000000000000000000000e-1000");
        let mut too_small = unsafe { too_small.as_bytes_mut() };
        let v_too_small = to_value(&mut too_small);
        assert!(v_too_small.is_err());
    }