rust_json/
lib.rs

1mod macros;
2mod parser;
3mod serialize;
4mod traits;
5
6pub use parser::json_parse;
7pub use traits::FromJson;
8pub use traits::ToJson;
9
10use std::ops;
11
12#[derive(Debug, PartialEq, Clone)]
13pub enum JsonElem {
14
15    /// Represents a JSON null value.
16    /// 
17    /// ```
18    /// # use rust_json::json;
19    /// let j = json!(null);
20    /// ```
21    Null,
22
23    /// Represents a JSON boolean.
24    /// 
25    /// ```
26    /// # use rust_json::json;
27    /// let j = json!(true);
28    /// ```
29    Bool(bool),
30
31    /// Represents a JSON number, storing in `f64`.
32    /// 
33    /// ```
34    /// # use rust_json::json;
35    /// let j = json!(3.14);
36    /// ```
37    Number(f64),
38
39    /// Represents a JSON string.
40    /// 
41    /// ```
42    /// # use rust_json::json;
43    /// let j = json!("abc");
44    /// ```
45    Str(String),
46
47    /// Represents a JSON array.
48    /// 
49    /// ```
50    /// # use rust_json::json;
51    /// let j = json!(["an", "array"]);
52    /// ```
53    Array(Vec<JsonElem>),
54
55    /// Represents a JSON object.
56    /// 
57    /// ```
58    /// # use rust_json::json;
59    /// let j = json!({"an": "object"});
60    /// ```
61    Object(std::collections::HashMap<String, JsonElem>),
62}
63
64impl JsonElem {
65
66    /// Get the value stored in `JsonElem` and desrialize into `T`.
67    /// 
68    /// ```
69    /// # use rust_json::json;
70    /// assert_eq!(Some(12.3), json!(12.3).get());
71    /// assert_eq!(None, json!("abc").get::<bool>());
72    /// ```
73    pub fn get<T: FromJson>(self) -> Option<T> {
74        T::from_json(self)
75    }
76
77    pub fn is_null(&self) -> bool {
78        matches!(self, JsonElem::Null)
79    }
80
81    pub fn is_bool(&self) -> bool {
82        matches!(self, JsonElem::Bool(_))
83    }
84
85    pub fn is_string(&self) -> bool {
86        matches!(self, JsonElem::Str(_))
87    }
88
89    pub fn is_array(&self) -> bool {
90        matches!(self, JsonElem::Array(_))
91    }
92
93    pub fn is_object(&self) -> bool {
94        matches!(self, JsonElem::Object(_))
95    }
96}
97
98impl ops::Index<usize> for JsonElem {
99    type Output = JsonElem;
100    fn index(&self, idx: usize) -> &Self::Output {
101        match self {
102            JsonElem::Array(a) if idx < a.len() => &a[idx],
103            _ => &JsonElem::Null,
104        }
105    }
106}
107
108impl ops::Index<&str> for JsonElem {
109    type Output = JsonElem;
110    fn index(&self, idx: &str) -> &Self::Output {
111        match self {
112            JsonElem::Object(o) if o.contains_key(idx) => &o[idx],
113            _ => &JsonElem::Null,
114        }
115    }
116}
117
118#[derive(Debug, PartialEq, Eq, Clone)]
119pub enum JsonParseErr {
120    ExpectValue,
121    InvalidValue,
122    RootNotSingular,
123    InvalidStringEscape,
124    MissQuotationMark,
125    InvalidStringChar,
126    InvalidUnicodeHex,
127    InvalidUnicodeSurrogate,
128    ArrayMissCommaOrSquareBacket,
129    ObjectMissCommaOrCurlyBacket,
130    ObjectMissKey,
131    ObjectMissColon,
132}
rust_json/lib.rs

rust_json/
lib.rs
