AST: Remove unused and incorrect BridgedASTType::subst()

Author: slavapestov

SwiftCompilerSources/Sources/AST/Type.swift

@@ -64,10 +64,6 @@ public struct Type: TypeProperties, CustomStringConvertible, NoReflectionChildre
   public func subst(with substitutionMap: SubstitutionMap) -> Type {
     return Type(bridged: bridged.subst(substitutionMap.bridged))
   }
-
-  public func subst(type: Type, with targetType: Type) -> Type {
-    return Type(bridged: bridged.subst(type.bridged, targetType.bridged))
-  }
 }
 
 /// A Type that is statically known to be canonical.
@@ -88,10 +84,6 @@ public struct CanonicalType: TypeProperties, CustomStringConvertible, NoReflecti
   public func subst(with substitutionMap: SubstitutionMap) -> CanonicalType {
     return rawType.subst(with: substitutionMap).canonical
   }
-
-  public func subst(type: CanonicalType, with targetType: CanonicalType) -> CanonicalType {
-    return self.rawType.subst(type: type.rawType, with: targetType.rawType).canonical
-  }
 }
 
 /// Implements the common members of `AST.Type`, `AST.CanonicalType` and `SIL.Type`.

include/swift/AST/ASTBridging.h

@@ -3115,7 +3115,6 @@ struct BridgedASTType {
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedSubstitutionMap getContextSubstitutionMap() const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedGenericSignature getInvocationGenericSignatureOfFunctionType() const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedASTType subst(BridgedSubstitutionMap substMap) const;
-  SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedASTType subst(BridgedASTType fromType, BridgedASTType toType) const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedConformance checkConformance(BridgedDeclObj proto) const;  
 };
 

include/swift/AST/ASTBridgingImpl.h

@@ -596,17 +596,6 @@ BridgedASTType BridgedASTType::subst(BridgedSubstitutionMap substMap) const {
   return {unbridged().subst(substMap.unbridged()).getPointer()};
 }
 
-
-BridgedASTType BridgedASTType::subst(BridgedASTType fromType, BridgedASTType toType) const {
-  auto *fromTy = fromType.unbridged()->castTo<swift::SubstitutableType>();
-  swift::Type toTy = toType.unbridged();
-  return {unbridged().subst([fromTy, toTy](swift::SubstitutableType *t) -> swift::Type {
-    if (t == fromTy)
-      return toTy;
-    return t;
-  }, swift::LookUpConformanceInModule(), swift::SubstFlags::SubstituteLocalArchetypes).getPointer()};
-}
-
 BridgedConformance BridgedASTType::checkConformance(BridgedDeclObj proto) const {
   return swift::checkConformance(unbridged(), proto.getAs<swift::ProtocolDecl>(), /*allowMissing=*/ false);
 }