toasty_core/error/
unsupported_feature.rs

1use super::Error;
2
3/// Error when a database does not support a requested feature.
4///
5/// This occurs when:
6/// - A statement type is not supported by the database (unsupported primitive type)
7/// - A storage type is not available (VARCHAR not supported)
8/// - A feature constraint is exceeded (VARCHAR size exceeds database limit)
9///
10/// These errors are typically caught during schema construction or validation,
11/// indicating a mismatch between application requirements and database capabilities.
12#[derive(Debug)]
13pub(super) struct UnsupportedFeature {
14    message: Box<str>,
15}
16
17impl std::error::Error for UnsupportedFeature {}
18
19impl core::fmt::Display for UnsupportedFeature {
20    fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
21        write!(f, "unsupported feature: {}", self.message)
22    }
23}
24
25impl Error {
26    /// Creates an unsupported feature error.
27    ///
28    /// This is used when a database does not support a requested feature,
29    /// such as a specific type, storage constraint, or capability.
30    ///
31    /// # Examples
32    ///
33    /// ```
34    /// use toasty_core::Error;
35    ///
36    /// let err = Error::unsupported_feature("ARRAY type not supported");
37    /// assert!(err.is_unsupported_feature());
38    /// assert_eq!(err.to_string(), "unsupported feature: ARRAY type not supported");
39    /// ```
40    pub fn unsupported_feature(message: impl Into<String>) -> Error {
41        Error::from(super::ErrorKind::UnsupportedFeature(UnsupportedFeature {
42            message: message.into().into(),
43        }))
44    }
45
46    /// Returns `true` if this error is an unsupported feature error.
47    pub fn is_unsupported_feature(&self) -> bool {
48        matches!(self.kind(), super::ErrorKind::UnsupportedFeature(_))
49    }
50}
toasty_core/error/unsupported_feature.rs

toasty_core/error/
unsupported_feature.rs
