shiny_configuration/value/
deserialize.rs

1use crate::value::Value;
2use serde::de::{MapAccess, SeqAccess, Visitor};
3use serde::{de, Deserialize, Deserializer};
4use std::collections::HashMap;
5use std::fmt;
6
7impl<'de> Deserialize<'de> for Value {
8    fn deserialize<D: Deserializer<'de>>(de: D) -> Result<Value, D::Error> {
9        de.deserialize_any(ValueVisitor)
10    }
11}
12
13pub struct ValueVisitor;
14
15macro_rules! visit_fn {
16    ($name:ident: $T:ty => $V:path) => {
17        #[inline]
18        fn $name<E: serde::de::Error>(self, v: $T) -> Result<Self::Value, E> {
19            Ok(v.into())
20        }
21    };
22}
23
24impl<'de> Visitor<'de> for ValueVisitor {
25    type Value = Value;
26
27    fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result {
28        f.write_str("a config value")
29    }
30
31    visit_fn!(visit_bool: bool => Value::Bool);
32    visit_fn!(visit_char: char => Value::String);
33    visit_fn!(visit_str: &str => Value::String);
34    visit_fn!(visit_string: String => Value::String);
35
36    visit_fn!(visit_u8: u8 => Value::Number);
37    visit_fn!(visit_u16: u16 => Value::Number);
38    visit_fn!(visit_u32: u32 => Value::Number);
39    visit_fn!(visit_u64: u64 => Value::Number);
40
41    visit_fn!(visit_i8: i8 => Value::Number);
42    visit_fn!(visit_i16: i16 => Value::Number);
43    visit_fn!(visit_i32: i32 => Value::Number);
44    visit_fn!(visit_i64: i64 => Value::Number);
45
46    visit_fn!(visit_f32: f32 => Value::Number);
47    visit_fn!(visit_f64: f64 => Value::Number);
48
49    fn visit_none<E: de::Error>(self) -> Result<Self::Value, E> {
50        Ok(Value::None)
51    }
52
53    fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
54        where
55            D: Deserializer<'de>,
56    {
57        deserializer.deserialize_any(self)
58    }
59
60    fn visit_unit<E: de::Error>(self) -> Result<Self::Value, E> {
61        Ok(Value::None)
62    }
63
64    fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
65        where
66            A: SeqAccess<'de>,
67    {
68        let mut array: Vec<Value> = Vec::with_capacity(seq.size_hint().unwrap_or(0));
69        while let Some(elem) = seq.next_element()? {
70            array.push(elem);
71        }
72
73        Ok(array.into())
74    }
75
76    fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
77        where
78            A: MapAccess<'de>,
79    {
80        let mut dict: HashMap<String, Value> = HashMap::new();
81
82        while let Some((key, value)) = map.next_entry()? {
83            dict.insert(key, value);
84        }
85
86        Ok(dict.into())
87    }
88}
shiny_configuration/value/deserialize.rs

shiny_configuration/value/
deserialize.rs
