[go: up one dir, main page]

toml 0.9.8

A native Rust encoder and decoder of TOML-formatted files and streams. Provides implementations of the standard Serialize/Deserialize traits for TOML data to facilitate deserializing and serializing Rust structures.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147

use core::fmt::Write as _;

use toml_writer::TomlWrite as _;

use super::Error;
use super::Style;
use crate::alloc_prelude::*;

#[doc(hidden)]
pub struct SerializeValueArray<'d> {
    dst: &'d mut String,
    seen_value: bool,
    style: Style,
    len: Option<usize>,
}

impl<'d> SerializeValueArray<'d> {
    pub(crate) fn seq(
        dst: &'d mut String,
        style: Style,
        len: Option<usize>,
    ) -> Result<Self, Error> {
        dst.open_array()?;
        Ok(Self {
            dst,
            seen_value: false,
            style,
            len,
        })
    }

    fn end(self) -> Result<&'d mut String, Error> {
        if self.multiline_array() && self.seen_value {
            self.dst.newline()?;
        }
        self.dst.close_array()?;
        Ok(self.dst)
    }

    fn multiline_array(&self) -> bool {
        self.style.multiline_array && 2 <= self.len.unwrap_or(usize::MAX)
    }
}

impl<'d> serde_core::ser::SerializeSeq for SerializeValueArray<'d> {
    type Ok = &'d mut String;
    type Error = Error;

    fn serialize_element<T>(&mut self, value: &T) -> Result<(), Error>
    where
        T: serde_core::ser::Serialize + ?Sized,
    {
        if self.multiline_array() {
            self.dst.newline()?;
            write!(self.dst, "    ")?;
        } else {
            if self.seen_value {
                self.dst.val_sep()?;
                self.dst.space()?;
            }
        }
        self.seen_value = true;
        value.serialize(super::ValueSerializer::with_style(self.dst, self.style))?;
        if self.multiline_array() {
            self.dst.val_sep()?;
        }
        Ok(())
    }

    fn end(self) -> Result<Self::Ok, Self::Error> {
        self.end()
    }
}

impl<'d> serde_core::ser::SerializeTuple for SerializeValueArray<'d> {
    type Ok = &'d mut String;
    type Error = Error;

    fn serialize_element<T>(&mut self, value: &T) -> Result<(), Error>
    where
        T: serde_core::ser::Serialize + ?Sized,
    {
        serde_core::ser::SerializeSeq::serialize_element(self, value)
    }

    fn end(self) -> Result<Self::Ok, Self::Error> {
        serde_core::ser::SerializeSeq::end(self)
    }
}

impl<'d> serde_core::ser::SerializeTupleStruct for SerializeValueArray<'d> {
    type Ok = &'d mut String;
    type Error = Error;

    fn serialize_field<T>(&mut self, value: &T) -> Result<(), Error>
    where
        T: serde_core::ser::Serialize + ?Sized,
    {
        serde_core::ser::SerializeSeq::serialize_element(self, value)
    }

    fn end(self) -> Result<Self::Ok, Self::Error> {
        serde_core::ser::SerializeSeq::end(self)
    }
}

pub struct SerializeTupleVariant<'d> {
    inner: SerializeValueArray<'d>,
}

impl<'d> SerializeTupleVariant<'d> {
    pub(crate) fn tuple(
        dst: &'d mut String,
        variant: &'static str,
        len: usize,
        style: Style,
    ) -> Result<Self, Error> {
        dst.open_inline_table()?;
        dst.space()?;
        dst.key(variant)?;
        dst.space()?;
        dst.keyval_sep()?;
        dst.space()?;
        Ok(Self {
            inner: SerializeValueArray::seq(dst, style, Some(len))?,
        })
    }
}

impl<'d> serde_core::ser::SerializeTupleVariant for SerializeTupleVariant<'d> {
    type Ok = &'d mut String;
    type Error = Error;

    fn serialize_field<T>(&mut self, value: &T) -> Result<(), Error>
    where
        T: serde_core::ser::Serialize + ?Sized,
    {
        serde_core::ser::SerializeSeq::serialize_element(&mut self.inner, value)
    }

    fn end(self) -> Result<Self::Ok, Self::Error> {
        let dst = self.inner.end()?;
        dst.space()?;
        dst.close_inline_table()?;
        Ok(dst)
    }
}