deribit_fix/
macros.rs

1/******************************************************************************
2   Author: Joaquín Béjar García
3   Email: jb@taunais.com
4   Date: 6/3/26
5******************************************************************************/
6
7//! Utility macros for Debug and Display implementations
8//!
9//! These macros provide JSON-based Debug and Display implementations for types
10//! that implement Serialize.
11
12/// Implements `Display` for types that implement `Serialize`.
13/// The output is compact JSON format.
14#[macro_export]
15macro_rules! impl_json_display {
16    ($($t:ty),+ $(,)?) => {
17        $(
18            impl std::fmt::Display for $t {
19                fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
20                    match serde_json::to_string(self) {
21                        Ok(json) => write!(f, "{}", json),
22                        Err(e) => write!(f, "<serialization error: {}>", e),
23                    }
24                }
25            }
26        )+
27    };
28}
29
30/// Implements `Debug` for types that implement `Serialize`.
31/// The output is pretty-printed JSON format.
32#[macro_export]
33macro_rules! impl_json_debug_pretty {
34    ($($t:ty),+ $(,)?) => {
35        $(
36            impl std::fmt::Debug for $t {
37                fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
38                    match serde_json::to_string_pretty(self) {
39                        Ok(json) => write!(f, "{}", json),
40                        Err(e) => write!(f, "<serialization error: {}>", e),
41                    }
42                }
43            }
44        )+
45    };
46}
47
48#[cfg(test)]
49mod tests {
50    use serde::Serialize;
51
52    #[derive(Serialize)]
53    struct TestStruct {
54        name: String,
55        value: i32,
56    }
57
58    impl_json_display!(TestStruct);
59    impl_json_debug_pretty!(TestStruct);
60
61    #[test]
62    fn test_display() {
63        let test = TestStruct {
64            name: "test".to_string(),
65            value: 42,
66        };
67        let display = format!("{}", test);
68        assert!(display.contains("test"));
69        assert!(display.contains("42"));
70    }
71
72    #[test]
73    fn test_debug() {
74        let test = TestStruct {
75            name: "test".to_string(),
76            value: 42,
77        };
78        let debug = format!("{:?}", test);
79        assert!(debug.contains("test"));
80        assert!(debug.contains("42"));
81    }
82}
deribit_fix/macros.rs

deribit_fix/
macros.rs
