Enum DescriptorError 

#[non_exhaustive]
pub enum DescriptorError {
    Decode(DecodeError),
    MissingFileName,
    MissingName {
        location: String,
    },
    UnresolvedType {
        field: String,
        type_name: String,
    },
    DuplicateType(String),
    DuplicateFile(String),
    Proto3RequiredField {
        field: String,
    },
    InvalidFieldNumber {
        message: String,
        number: i32,
        max: u32,
    },
    MissingFieldType {
        field: String,
    },
    MissingTypeName {
        field: String,
        kind: &'static str,
    },
    InvalidOneofIndex {
        field: String,
        index: i32,
        count: usize,
    },
    Proto3EnumMissingZero(String),
    InvalidDefaultValue {
        field: String,
        value: String,
        message: String,
    },
    Validation(String),
}

All ways descriptor pool construction or lookup can fail.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Decode(DecodeError)

The serialized FileDescriptorSet bytes could not be parsed.

MissingFileName

A FileDescriptorProto.name field was missing.

MissingName

A nested type (message / enum / field / oneof) had no name set.

Fields

location: String

Containing context (file or fully-qualified message name) for the offending descriptor.

UnresolvedType

A field referenced a type_name that no descriptor in the pool defines.

Fields

field: String

Fully-qualified name of the field whose type_name is dangling.

type_name: String

The unresolved type_name value verbatim.

DuplicateType(String)

Two descriptors share the same fully-qualified name within a single pool.

DuplicateFile(String)

Two FileDescriptorProtos carry the same name.

Proto3RequiredField

proto3 forbids LABEL_REQUIRED. The descriptor declared one anyway.

Fields

field: String

Fully-qualified field name.

InvalidFieldNumber

A field declared a number outside the protobuf-permitted range or inside the reserved internal range.

Fields

message: String

Fully-qualified message name owning the field.

number: i32

The offending number as it appeared on the descriptor.

max: u32

Maximum permissible field number (536_870_911).

MissingFieldType

FieldDescriptorProto.type was unset and no type_name was supplied — we cannot resolve the field’s crate::Kind.

Fields

field: String

Fully-qualified field name.

MissingTypeName

FieldDescriptorProto.type was MESSAGE or GROUP/ENUM but type_name was empty.

Fields

field: String

Fully-qualified field name.

kind: &'static str

The descriptor’s declared type enum value.

InvalidOneofIndex

A oneof_index referenced a slot that does not exist in the containing message’s oneof_decl list.

Fields

field: String

Fully-qualified field name.

index: i32

The offending oneof index.

count: usize

Number of oneof_decl entries in the containing message.

Proto3EnumMissingZero(String)

A proto3 enum is missing a variant with value 0 (required for proto3 default semantics).

InvalidDefaultValue

FieldDescriptorProto.default_value could not be parsed against the field’s resolved kind.

Fields

field: String

Fully-qualified field name.

value: String

The literal string that failed to parse.

message: String

Parser-level diagnostic.

Validation(String)

Generic descriptor-validation failure.

Trait Implementations

impl Debug for DescriptorError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for DescriptorError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for DescriptorError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<DecodeError> for DescriptorError

fn from(source: DecodeError) -> Self

Converts to this type from the input type.