1  use std::io::Write;
2  
3  use serde::ser::Serialize;
4  
5  use super::Serializer;
6  use crate::error::{Error, Result};
7  
8  pub struct TupleSerializer<'ser, W: 'ser + Write> {
9      ser: &'ser mut Serializer<W>,
10      must_close_tag: bool,
11      first: bool,
12  }
13  
14  impl<'ser, W: 'ser + Write> TupleSerializer<'ser, W> {
new(ser: &'ser mut Serializer<W>, must_close_tag: bool) -> Self15      pub fn new(ser: &'ser mut Serializer<W>, must_close_tag: bool) -> Self {
16          Self {
17              ser,
18              must_close_tag,
19              first: true,
20          }
21      }
22  
serialize_item<T>(&mut self, value: &T) -> Result<()> where T: ?Sized + Serialize,23      fn serialize_item<T>(&mut self, value: &T) -> Result<()>
24      where
25          T: ?Sized + Serialize,
26      {
27          if self.first {
28              self.first = false;
29          } else {
30              self.ser.characters(" ")?;
31          }
32          value.serialize(&mut *self.ser)?;
33          Ok(())
34      }
35  
after_items(self) -> Result<()>36      fn after_items(self) -> Result<()> {
37          if self.must_close_tag {
38              self.ser.end_tag()?;
39          }
40          Ok(())
41      }
42  }
43  
44  impl<'ser, W: 'ser + Write> serde::ser::SerializeTupleVariant for TupleSerializer<'ser, W> {
45      type Ok = ();
46      type Error = Error;
47  
serialize_field<T>(&mut self, value: &T) -> Result<()> where T: ?Sized + Serialize,48      fn serialize_field<T>(&mut self, value: &T) -> Result<()>
49      where
50          T: ?Sized + Serialize,
51      {
52          self.serialize_item(value)
53      }
54  
end(self) -> Result<()>55      fn end(self) -> Result<()> {
56          self.ser.end_tag()?;
57          self.after_items()
58      }
59  }
60  
61  impl<'ser, W: 'ser + Write> serde::ser::SerializeTupleStruct for TupleSerializer<'ser, W> {
62      type Ok = ();
63      type Error = Error;
64  
serialize_field<T>(&mut self, value: &T) -> Result<()> where T: ?Sized + Serialize,65      fn serialize_field<T>(&mut self, value: &T) -> Result<()>
66      where
67          T: ?Sized + Serialize,
68      {
69          self.serialize_item(value)
70      }
71  
end(self) -> Result<()>72      fn end(self) -> Result<()> {
73          self.after_items()
74      }
75  }
76  
77  impl<'ser, W: 'ser + Write> serde::ser::SerializeTuple for TupleSerializer<'ser, W> {
78      type Ok = ();
79      type Error = Error;
80  
serialize_element<T>(&mut self, value: &T) -> Result<()> where T: ?Sized + Serialize,81      fn serialize_element<T>(&mut self, value: &T) -> Result<()>
82      where
83          T: ?Sized + Serialize,
84      {
85          self.serialize_item(value)
86      }
87  
end(self) -> Result<()>88      fn end(self) -> Result<()> {
89          self.after_items()
90      }
91  }
92