refactor(meta/error): remove unused ToMetaError

Author: drmingdrmer

src/meta/types/src/lib.rs

@@ -124,7 +124,6 @@ pub use meta_bytes_error::MetaBytesError;
 pub use meta_client_errors::MetaClientError;
 pub use meta_errors::MetaError;
 pub use meta_errors::MetaResult;
-pub use meta_errors_into::ToMetaError;
 pub use meta_forward_errors::MetaAPIError;
 pub use meta_forward_errors::MetaDataError;
 pub use meta_forward_errors::MetaDataReadError;

src/meta/types/src/meta_errors_into.rs

@@ -12,13 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use std::fmt::Display;
-
 use common_exception::ErrorCode;
 
 use crate::MetaError;
 use crate::MetaNetworkError;
-use crate::MetaResult;
 
 impl From<MetaError> for ErrorCode {
     fn from(e: MetaError) -> Self {
@@ -31,45 +28,6 @@ impl From<MetaError> for ErrorCode {
     }
 }
 
-pub trait ToMetaError<T, E, CtxFn>
-where E: Display + Send + Sync + 'static
-{
-    /// Wrap the error value with MetaError. It is lazily evaluated:
-    /// only when an error does occur.
-    ///
-    /// `err_code_fn` is one of the MetaError builder function such as `MetaError::Ok`.
-    /// `context_fn` builds display_text for the MetaError.
-    fn map_error_to_meta_error<ErrFn, D>(
-        self,
-        err_code_fn: ErrFn,
-        context_fn: CtxFn,
-    ) -> MetaResult<T>
-    where
-        ErrFn: FnOnce(String) -> MetaError,
-        D: Display,
-        CtxFn: FnOnce() -> D;
-}
-
-impl<T, E, CtxFn> ToMetaError<T, E, CtxFn> for std::result::Result<T, E>
-where E: Display + Send + Sync + 'static
-{
-    fn map_error_to_meta_error<ErrFn, D>(
-        self,
-        make_exception: ErrFn,
-        context_fn: CtxFn,
-    ) -> MetaResult<T>
-    where
-        ErrFn: FnOnce(String) -> MetaError,
-        D: Display,
-        CtxFn: FnOnce() -> D,
-    {
-        self.map_err(|error| {
-            let err_text = format!("{}, cause: {}", context_fn(), error);
-            make_exception(err_text)
-        })
-    }
-}
-
 impl From<tonic::Status> for MetaError {
     fn from(status: tonic::Status) -> Self {
         let net_err = MetaNetworkError::from(status);