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//===--- TypeDeclFinder.cpp - Finds TypeDecls inside Types/TypeReprs ------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "swift/AST/TypeDeclFinder.h"
#include "swift/AST/Decl.h"
#include "swift/AST/TypeRepr.h"
#include "swift/AST/Types.h"
using namespace swift;
TypeWalker::Action TypeDeclFinder::walkToTypePre(Type T) {
if (auto *TAT = dyn_cast<TypeAliasType>(T.getPointer()))
return visitTypeAliasType(TAT);
// FIXME: We're looking through sugar here so that we visit, e.g.,
// Swift.Array when we see `[Int]`. But that means we do redundant work when
// we see sugar that's purely structural, like `(Int)`. Fortunately, paren
// types are the only such purely structural sugar at the time this comment
// was written, and they're not so common in the first place.
if (auto *BGT = T->getAs<BoundGenericType>())
return visitBoundGenericType(BGT);
if (auto *NT = T->getAs<NominalType>())
return visitNominalType(NT);
return Action::Continue;
}
TypeWalker::Action
SimpleTypeDeclFinder::visitNominalType(NominalType *ty) {
return Callback(ty->getDecl());
}
TypeWalker::Action
SimpleTypeDeclFinder::visitBoundGenericType(BoundGenericType *ty) {
return Callback(ty->getDecl());
}
TypeWalker::Action
SimpleTypeDeclFinder::visitTypeAliasType(TypeAliasType *ty) {
return Callback(ty->getDecl());
}
ASTWalker::PostWalkAction
DeclRefTypeReprFinder::walkToTypeReprPost(TypeRepr *TR) {
auto *declRefTR = dyn_cast<DeclRefTypeRepr>(TR);
if (!declRefTR || !declRefTR->getBoundDecl())
return Action::Continue();
return Action::StopIf(!Callback(declRefTR));
}
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