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removed hard coded generic vector from layouts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| // MIT License | ||
| // | ||
| // Copyright (c) 2017 Wesley Wickwire | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in all | ||
| // copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| // SOFTWARE. | ||
|
|
||
| protocol NominalMetadataType: MetadataType where Layout: NominalMetadataLayoutType { | ||
|
|
||
| /// The offset of the generic type vector in pointer sized words from the | ||
| /// start of the metadata record. | ||
| var genericArgumentOffset: Int { get } | ||
| } | ||
|
|
||
| extension NominalMetadataType { | ||
|
|
||
| var genericArgumentOffset: Int { | ||
| // default to 2. This would put it right after the type descriptor which is valid | ||
| // for all types except for classes | ||
| return 2 | ||
| } | ||
|
|
||
| mutating func mangledName() -> String { | ||
| return String(cString: pointer.pointee.typeDescriptor.pointee.mangledName.advanced()) | ||
| } | ||
|
|
||
| mutating func numberOfFields() -> Int { | ||
| return pointer.pointee.typeDescriptor.pointee.numberOfFields.getInt() | ||
| } | ||
|
|
||
| mutating func fieldOffsets() -> [Int] { | ||
| return pointer.pointee.typeDescriptor.pointee | ||
| .offsetToTheFieldOffsetVector | ||
| .vector(metadata: pointer.raw.assumingMemoryBound(to: Int.self), n: numberOfFields()) | ||
| .map { $0.getInt() } | ||
| } | ||
|
|
||
| mutating func properties() -> [PropertyInfo] { | ||
| let offsets = fieldOffsets() | ||
| let fieldDescriptor = pointer.pointee.typeDescriptor.pointee | ||
| .fieldDescriptor | ||
| .advanced() | ||
|
|
||
| let genericVector = genericArgumentVector() | ||
|
|
||
| return (0..<numberOfFields()).map { i in | ||
| let record = fieldDescriptor | ||
| .pointee | ||
| .fields | ||
| .element(at: i) | ||
|
|
||
| return PropertyInfo( | ||
| name: record.pointee.fieldName(), | ||
| type: record.pointee.type( | ||
| genericContext: pointer.pointee.typeDescriptor, | ||
| genericArguments: genericVector.pointee.element(at: 0) | ||
| ), | ||
| isVar: record.pointee.isVar, | ||
| offset: offsets[i], | ||
| ownerType: type | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| func genericArguments() -> [Any.Type] { | ||
| let n = pointer.pointee.typeDescriptor.pointee.genericContextHeader.base.numberOfParams | ||
| guard n > 0 else { return [] } | ||
|
|
||
| let vector = genericArgumentVector() | ||
| return (0..<Int(pointer.pointee.typeDescriptor.pointee.genericContextHeader.base.numberOfParams)).map { i in | ||
| return vector.pointee.element(at: i).pointee | ||
| } | ||
| } | ||
|
|
||
| func genericArgumentVector() -> UnsafeMutablePointer<Vector<Any.Type>> { | ||
| return pointer | ||
| .advanced(by: genericArgumentOffset, wordSize: MemoryLayout<UnsafeRawPointer>.size) | ||
| .assumingMemoryBound(to: Vector<Any.Type>.self) | ||
| } | ||
| } |
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