小编ril*_*mas的帖子

我在将Vec<u16>内容写入文件时遇到问题:

use std::fs::File;
use std::io::{Write, BufWriter};
use std::mem;

#[derive(Debug, Copy, Clone, PartialEq)]
pub enum ImageFormat {
    GrayScale,
    Rgb32,
}

#[derive(Debug, Copy, Clone, PartialEq)]
pub struct ImageHeader {
    pub width: usize,
    pub height: usize,
    pub format: ImageFormat,
}

pub struct Image {
    pub header: ImageHeader,
    pub data: Vec<u16>,
}

fn write_to_file(path: &str, img: &Image) -> std::io::Result<()> {
    let f = try!(File::create(path));
    let mut bw = BufWriter::new(f);
    let slice = &img.data[..];
    println!("before length: {}", slice.len());
    let sl: &[u8];
    unsafe { …