Question

我已经在模块内部实现了一个结构。我正在尝试为结构的参考切片实现io :: Read特性。

这是我的代码的简化版本。目前，新特性实施效率低下。我正在尝试不同的方法来使其正常工作。

function onOpen() {
  var ui = SpreadsheetApp.getUi();
  ui.createMenu('Question')
      .addItem('Send Question', 'sendQuestion')
      .addSeparator()
      .addItem('Send Answer', 'sendAnswer')
      .addToUi();
}


function sendQuestion() {
  var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Questions");
  var range = sheet.getRange("A22:L2");
  var emailvalid = range.getCell(1,7).getValue();
  var question = range.getCell(1,5).getValue();
  var answer = range.getCell(1,6).getValue();
  var qvalid = range.getCell(1,8).getValue();
  var ansvalid = range.getCell(1,10).getValue();

  if(qvalid == "Nope"){
      Browser.msgBox("Please, write a question !"); 
    }
  else {
    return false};
  
    if(emailvalid == "Nope"){
      Browser.msgBox("Please, input a valid email address !"); 
    }
  else {
    return false};
  
  var from = range.getCell(1,1).getValue();
  var recipient = range.getCell(1,2).getValue();
  var emailTo = range.getCell(1,3).getValue();
  var subject = "Project Management | Your received a new question" + question;
  var link = "https://docs.google.com/spreadsheets/d/1QUbw0WNju55h5pk3l8QqVCYa_jSCzrIzMjf0N4v-z8c/edit?usp=sharing"
  var options = {}
        options.htmlBody = "Hi" + recipient +"," + "<br />"+ "<br />" + "You received a new question from " + from + "<br />" + "<br />" + "You can answer directly into the table here: "<"br />"+"<br />" + link + "<br />" + "<br />"+ "Thank you";
        GmailApp.sendEmail(emailTo, subject, " ", options);

}

function emailSent(){
  var ui = SpreadsheetApp.getUi();
  var sent = sendQuestion("Send Email ?",ui.ButtonSet.YES_NO);
    
  if(sent == ui.Button.YES) {
    ui.alert("Your Message has been sent.");
  } else {
    ui.alert("Email canceled");
  }
}

rust编译器一直在抱怨此错误的代码：

struct mytype {
    inner: f32,
}
impl io::Read for mytype {
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        buf.write_u32::<LittleEndian>(self.inner.to_bits()).unwrap();
        Ok(4)
    }
}    
impl<'a> io::Read for &'a [mytype] {
    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
        let mut vec8: Vec<u8> = vec![];
        for t in self.iter() {
            match (*t).read_u32::<LittleEndian>() {
                Ok(u) => vec8.write_u32::<LittleEndian>(u).unwrap(),
                Err(x) => (),
            }
        }
        for (ind, it) in vec8.iter().enumerate() {
            buf[ind] = *it;
        }
        Ok(vec8.len())
    }
}

只需为error[E0117]: only traits defined in the current crate can be implemented for arbitrary types --> src\lib.rs:37:1 | 37 | impl<'a> io::Read for &'a [mytype] { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ impl doesn't use types inside crate | = note: the impl does not reference any types defined in this crate = note: define and implement a trait or new type instead实现io :: Read即可正常工作。

io :: Read新特性的实现

0 个答案: