Enum SchemaResolutionError 

#[non_exhaustive]
pub enum SchemaResolutionError {
    MissingSchema,
    MultipleSchemas {
        schemas: usize,
    },
    UnsupportedSchema {
        schema: String,
    },
}

Why a model’s declared schema release could not be resolved.

Every read path in this crate binds to the IFC release the file’s FILE_SCHEMA header declares (see crate::schema_of) rather than assuming IFC4. A file that does not name a release this crate has verified semantics for is refused, not silently read under the wrong table: guessing IFC4 for an IFC2X3 file mis-classifies IfcZone as a system and mis-reads IfcElectricalCircuit as not one (issue #52).

#[non_exhaustive]: new refusal reasons (e.g. a newly-verified release gaining support) must be addable without breaking callers matching on this type.

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.

MissingSchema

FILE_SCHEMA names no schema at all.

MultipleSchemas

FILE_SCHEMA names more than one schema; this crate reads only single-schema files.

Fields

schemas: usize

How many schema tokens the header carried.

UnsupportedSchema

FILE_SCHEMA names a release this read does not resolve.

crate::schema_of and the system, port and flow readers resolve IFC2X3 and IFC4. IFC4X3 is bundled in ifc-schema but its distribution-system semantics have not been verified for them, so it is refused there rather than defaulted to IFC4 – an IFC4X3 file assumed to be IFC4 would misread IfcBuiltSystem and related IFC4X3-only entities. The zone readers (crate::try_zones, crate::long_name_of) resolve IFC4X3 too (#194), so they refuse only a token with no bundled table.

Fields

schema: String

The header token as written, e.g. "IFC4X3_ADD2".

Trait Implementations

impl Clone for SchemaResolutionError

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SchemaResolutionError

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

Formats the value using the given formatter.

impl Display for SchemaResolutionError

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

Formats the value using the given formatter.

impl Eq for SchemaResolutionError

impl Error for SchemaResolutionError

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<SchemaResolutionError> for SchemaGap

fn from(error: SchemaResolutionError) -> Self

Converts to this type from the input type.

impl PartialEq for SchemaResolutionError

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for SchemaResolutionError