zzstat 0.1.4

A deterministic, hardcode-free stat calculation engine designed for MMORPGs
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

//! Error types for stat resolution.
//!
//! All errors that can occur during stat resolution are represented
//! by the `StatError` enum.

use crate::stat_id::StatId;
use thiserror::Error;

/// Errors that can occur during stat resolution.
///
/// # Examples
///
/// ```rust
/// use zzstat::{StatError, StatId};
///
/// let err = StatError::MissingSource(StatId::from_str("HP"));
/// println!("{}", err); // "Missing source for stat: HP"
/// ```
#[derive(Debug, Error, Clone, PartialEq)]
pub enum StatError {
    /// A dependency cycle was detected in the stat graph.
    ///
    /// Contains the path of stats involved in the cycle.
    ///
    /// # Example
    ///
    /// If A depends on B, B depends on C, and C depends on A,
    /// this error will contain `[A, C, B, A]` showing the cycle.
    #[error("Dependency cycle detected: {0:?}")]
    CycleDetected(Vec<StatId>),

    /// A required dependency stat was not found.
    ///
    /// This occurs when a transform declares a dependency on a stat
    /// that hasn't been resolved yet or doesn't exist.
    #[error("Missing dependency: {0}")]
    MissingDependency(StatId),

    /// No source was registered for a stat.
    ///
    /// This occurs when trying to resolve a stat that has no sources.
    #[error("Missing source for stat: {0}")]
    MissingSource(StatId),

    /// A transform application failed.
    ///
    /// Contains the stat ID and a description of what went wrong.
    #[error("Invalid transform for stat {0}: {1}")]
    InvalidTransform(StatId, String),
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_error_display() {
        let err = StatError::MissingSource(StatId::from_str("HP"));
        assert!(err.to_string().contains("HP"));
    }
}