feature_flag/
error.rs

1//! Crate-wide error type.
2
3use std::path::PathBuf;
4
5use thiserror::Error;
6
7/// Anything that can go wrong inside the crate.
8#[derive(Debug, Error)]
9pub enum FeatureFlagError {
10    /// Failed to parse a JSON flagset.
11    #[error("failed to parse flagset: {0}")]
12    Parse(#[from] serde_json::Error),
13
14    /// Failed to read a flagset file.
15    #[error("failed to read flagset {path:?}: {source}")]
16    Io {
17        /// Path the caller was reading.
18        path: PathBuf,
19        /// Underlying io error.
20        #[source]
21        source: std::io::Error,
22    },
23
24    /// The flagset is structurally valid but invalid as a logical config
25    /// (e.g. a rollout that totals > 100, a variant referenced from a rule
26    /// that doesn't appear in the flag's variants list).
27    #[error("invalid flagset: {0}")]
28    Invalid(String),
29
30    /// Asked to evaluate a flag that isn't in the loaded flagset. The caller's
31    /// default value is returned via the `Evaluation::Default` outcome.
32    #[error("unknown flag: {0}")]
33    UnknownFlag(String),
34}
feature_flag/error.rs

feature_flag/
error.rs
