arrow 3.0.0

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
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// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/// Converts numeric type to a `String`
pub fn lexical_to_string<N: lexical_core::ToLexical>(n: N) -> String {
    let mut buf = Vec::<u8>::with_capacity(N::FORMATTED_SIZE_DECIMAL);
    unsafe {
        // JUSTIFICATION
        //  Benefit
        //      Allows using the faster serializer lexical core and convert to string
        //  Soundness
        //      Length of buf is set as written length afterwards. lexical_core
        //      creates a valid string, so doesn't need to be checked.
        let slice = std::slice::from_raw_parts_mut(buf.as_mut_ptr(), buf.capacity());
        let len = lexical_core::write(n, slice).len();
        buf.set_len(len);
        String::from_utf8_unchecked(buf)
    }
}