denali 0.18.0

Parser/writer of the Denali test format
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

use serde::{
    de::{self, Deserialize, Deserializer, MapAccess, SeqAccess, Visitor},
    ser::{Serialize, SerializeMap, SerializeSeq, Serializer},
};
use std::{collections::BTreeMap, fmt};

#[derive(PartialEq, Eq, Clone, Debug)]
pub enum ValueSubTree {
    Str(String),
    List(Vec<ValueSubTree>),
    Map(BTreeMap<String, ValueSubTree>),
}

impl ValueSubTree {
    pub fn is_empty_string(&self) -> bool {
        match self {
            ValueSubTree::Str(s) => s.is_empty(),
            _ => false,
        }
    }

    fn append_to_concatenated_string(&self, accumulator: &mut String) {
        match self {
            ValueSubTree::Str(s) => accumulator.push_str(s.as_str()),
            ValueSubTree::List(l) => {
                for item in l {
                    if !(accumulator.is_empty()) {
                        accumulator.push('|');
                    }
                    item.append_to_concatenated_string(accumulator);
                }
            },
            ValueSubTree::Map(m) => {
                for value in m.values() {
                    if !(accumulator.is_empty()) {
                        accumulator.push('|');
                    }
                    value.append_to_concatenated_string(accumulator);
                }
            },
        }
    }

    /// Concatenates all contained values into a String.
    pub fn to_concatenated_string(&self) -> String {
        let mut accumulator = String::new();
        self.append_to_concatenated_string(&mut accumulator);
        accumulator
    }
}

impl Default for ValueSubTree {
    fn default() -> Self {
        ValueSubTree::Str(String::from(""))
    }
}

impl Serialize for ValueSubTree {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        match self {
            ValueSubTree::Str(s) => serializer.serialize_str(s.as_str()),
            ValueSubTree::List(l) => {
                let mut seq = serializer.serialize_seq(Some(l.len()))?;
                for item in l {
                    seq.serialize_element(item)?;
                }
                seq.end()
            },
            ValueSubTree::Map(m) => {
                let mut map = serializer.serialize_map(Some(m.len()))?;
                for (k, v) in m {
                    map.serialize_entry(k, v)?;
                }
                map.end()
            },
        }
    }
}

pub(crate) struct ValueSubTreeVisitor;

impl<'de> Visitor<'de> for ValueSubTreeVisitor {
    type Value = ValueSubTree;

    // Format a message stating what data this Visitor expects to receive.
    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
        formatter.write_str("serialized object JSON representation")
    }

    fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
    where
        E: de::Error,
    {
        Ok(ValueSubTree::Str(String::from(value)))
    }

    fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
    where
        A: SeqAccess<'de>,
    {
        let mut list = Vec::<ValueSubTree>::new();

        while let Some(item) = seq.next_element()? {
            list.push(item);
        }

        Ok(ValueSubTree::List(list))
    }

    fn visit_map<M>(self, mut access: M) -> Result<Self::Value, M::Error>
    where
        M: MapAccess<'de>,
    {
        let mut map = BTreeMap::<String, ValueSubTree>::new();

        // While there are entries remaining in the input, add them
        // into our map.
        while let Some((key, value)) = access.next_entry()? {
            map.insert(key, value);
        }

        Ok(ValueSubTree::Map(map))
    }
}

impl<'de> Deserialize<'de> for ValueSubTree {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: Deserializer<'de>,
    {
        deserializer.deserialize_any(ValueSubTreeVisitor)
    }
}

impl fmt::Display for ValueSubTree {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", serde_json::to_string(self).unwrap())
    }
}