Clang Docs (75% documented)

Clang Reference RecordType Structure Reference

RecordType

public struct RecordType: ClangTypeBacked

MARK: Special Types

offsetOf(fieldName:)
Computes the offset of a named field in a record of the given type in bytes as it would be returned by offsetof as per C++11[18.2p4]
Throws

TypeLayoutError.invalid if the type declaration is not a record field.

TypeLayoutError.incomplete if the type declaration is an incomplete type

TypeLayoutError.dependent if the type declaration is dependent

TypeLayoutError.invalidFieldName if the field is not found in the receiving type.
Declaration
Swift

public func offsetOf(fieldName: String) throws -> Int
Return Value

The offset of a field with the given name in the type.
fields()
Gathers and returns all the fields of this record.
Declaration
Swift

public func fields() -> [Cursor]