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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 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 "RefactoringActions.h"
using namespace swift::refactoring;
namespace {
// A SingleDecl range may not include all decls actually declared in that range:
// a var decl has accessors that aren't included. This will find those missing
// decls.
class FindAllSubDecls : public SourceEntityWalker {
SmallPtrSetImpl<Decl *> &Found;
public:
FindAllSubDecls(SmallPtrSetImpl<Decl *> &found) : Found(found) {}
bool walkToDeclPre(Decl *D, CharSourceRange range) override {
// Record this Decl, and skip its contents if we've already touched it.
if (!Found.insert(D).second)
return false;
if (auto ASD = dyn_cast<AbstractStorageDecl>(D)) {
ASD->visitParsedAccessors(
[&](AccessorDecl *accessor) { Found.insert(accessor); });
}
return true;
}
};
} // namespace
bool RefactoringActionReplaceBodiesWithFatalError::isApplicable(
const ResolvedRangeInfo &Info, DiagnosticEngine &Diag) {
switch (Info.Kind) {
case RangeKind::SingleDecl:
case RangeKind::MultiTypeMemberDecl: {
SmallPtrSet<Decl *, 16> Found;
for (auto decl : Info.DeclaredDecls) {
FindAllSubDecls(Found).walk(decl.VD);
}
for (auto decl : Found) {
auto AFD = dyn_cast<AbstractFunctionDecl>(decl);
if (AFD && !AFD->isImplicit())
return true;
}
return false;
}
case RangeKind::SingleExpression:
case RangeKind::PartOfExpression:
case RangeKind::SingleStatement:
case RangeKind::MultiStatement:
case RangeKind::Invalid:
return false;
}
llvm_unreachable("unhandled kind");
}
bool RefactoringActionReplaceBodiesWithFatalError::performChange() {
const StringRef replacement = "{\nfatalError()\n}";
SmallPtrSet<Decl *, 16> Found;
for (auto decl : RangeInfo.DeclaredDecls) {
FindAllSubDecls(Found).walk(decl.VD);
}
for (auto decl : Found) {
auto AFD = dyn_cast<AbstractFunctionDecl>(decl);
if (!AFD || AFD->isImplicit())
continue;
auto range = AFD->getBodySourceRange();
// If we're in replacement mode (i.e. have an edit consumer), we can
// rewrite the function body.
auto charRange = Lexer::getCharSourceRangeFromSourceRange(SM, range);
EditConsumer.accept(SM, charRange, replacement);
}
return false;
}
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