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Unified: use type-inferred field resolution in data flow #22980
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| func source(_ s: String) -> String { return s } | ||
|
|
||
| @discardableResult | ||
| func sink(_ s: Any) -> String { return "" } | ||
|
|
||
| class FieldBox { | ||
| var field: String = "" | ||
| } | ||
|
|
||
| class OtherFieldBox { | ||
| var field: String = "" | ||
| } | ||
|
|
||
| class InheritedFieldBox: FieldBox {} | ||
|
|
||
| func resolvedFields() { | ||
| let box = FieldBox() | ||
| box.field = source("fields.resolved") | ||
| sink(box.field) // $ hasValueFlow=fields.resolved | ||
| sink((box as! OtherFieldBox).field) // no flow | ||
| } | ||
|
|
||
| func inheritedFields() { | ||
| let box = InheritedFieldBox() | ||
| box.field = source("fields.inherited") | ||
| sink((box as! FieldBox).field) // $ hasValueFlow=fields.inherited | ||
| } | ||
|
|
||
| func unresolvedFieldRead() { | ||
| let box = FieldBox() | ||
| box.field = source("fields.unresolved-read") | ||
| sink((box as! UnknownFieldBox).field) // $ hasValueFlow=fields.unresolved-read | ||
| } | ||
|
|
||
| func unresolvedFieldStore() { | ||
| let box = FieldBox() | ||
| (box as! UnknownFieldBox).field = source("fields.unresolved-store") | ||
| sink(box.field) // $ hasValueFlow=fields.unresolved-store | ||
| } | ||
|
|
||
| func summarizedFieldRead() { | ||
| let box = FieldBox() | ||
| box.field = source("fields.summary") | ||
| sink(TestType.readField(box)) // $ hasValueFlow=fields.summary | ||
| } | ||
|
|
||
| class BaseBox { | ||
| var field: String = "" | ||
| } | ||
|
|
||
| class OverridingBox: BaseBox { | ||
| override var field: String { | ||
| get { super.field } | ||
| set { super.field = newValue } | ||
| } | ||
| } | ||
|
|
||
| func overriddenFieldRead() { | ||
| let base: BaseBox = OverridingBox() | ||
| base.field = source("fields.override-read") | ||
| let sub = base as! OverridingBox | ||
| sink(sub.field) // $ hasValueFlow=fields.override-read | ||
| } | ||
|
|
||
| protocol FieldProtocol { | ||
| var field: String { get set } | ||
| } | ||
|
|
||
| class ProtocolBox: FieldProtocol { | ||
| var field: String = "" | ||
| } | ||
|
|
||
| func protocolFieldRead() { | ||
| let box = ProtocolBox() | ||
| box.field = source("fields.protocol") | ||
| sink(box.field) // $ hasValueFlow=fields.protocol | ||
| let p = box as FieldProtocol | ||
| sink(p.field) // $ MISSING: hasValueFlow=fields.protocol -- missing dispatch from `FieldProtocol.get_field` to `ProtocolBox.field` | ||
| } | ||
|
|
||
| func protocolFieldWrite() { | ||
| let box = ProtocolBox() | ||
| var p = box as FieldProtocol | ||
| p.field = source("fields.protocol") | ||
| sink(p.field) // $ MISSING: hasValueFlow=fields.protocol -- missing dispatch from `FieldProtocol.{get,set}_field` to `ProtocolBox.field` | ||
| sink(box.field) // $ MISSING: hasValueFlow=fields.protocol (aliasing) | ||
| let box2 = p as! OtherFieldBox | ||
| sink(box2.field) // no flow | ||
| } |
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