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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2023 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 "ContextFinder.h"
#include "RefactoringActions.h"
#include "swift/AST/Stmt.h"
using namespace swift::refactoring;
static CharSourceRange
findSourceRangeToWrapInCatch(const ResolvedExprStartCursorInfo &CursorInfo,
SourceFile *TheFile, SourceManager &SM) {
Expr *E = CursorInfo.getTrailingExpr();
if (!E)
return CharSourceRange();
auto Node = ASTNode(E);
auto NodeChecker = [](ASTNode N) { return N.isStmt(StmtKind::Brace); };
ContextFinder Finder(*TheFile, Node, NodeChecker);
Finder.resolve();
auto Contexts = Finder.getContexts();
if (Contexts.empty())
return CharSourceRange();
auto TargetNode = Contexts.back();
BraceStmt *BStmt = dyn_cast<BraceStmt>(TargetNode.dyn_cast<Stmt *>());
auto ConvertToCharRange = [&SM](SourceRange SR) {
return Lexer::getCharSourceRangeFromSourceRange(SM, SR);
};
assert(BStmt);
auto ExprRange = ConvertToCharRange(E->getSourceRange());
// Check elements of the deepest BraceStmt, pick one that covers expression.
for (auto Elem : BStmt->getElements()) {
auto ElemRange = ConvertToCharRange(Elem.getSourceRange());
if (ElemRange.contains(ExprRange))
TargetNode = Elem;
}
return ConvertToCharRange(TargetNode.getSourceRange());
}
bool RefactoringActionConvertToDoCatch::isApplicable(ResolvedCursorInfoPtr Tok,
DiagnosticEngine &Diag) {
auto ExprStartInfo = dyn_cast<ResolvedExprStartCursorInfo>(Tok);
if (!ExprStartInfo || !ExprStartInfo->getTrailingExpr())
return false;
return isa<ForceTryExpr>(ExprStartInfo->getTrailingExpr());
}
bool RefactoringActionConvertToDoCatch::performChange() {
auto ExprStartInfo = cast<ResolvedExprStartCursorInfo>(CursorInfo);
auto *TryExpr = dyn_cast<ForceTryExpr>(ExprStartInfo->getTrailingExpr());
assert(TryExpr);
auto Range = findSourceRangeToWrapInCatch(*ExprStartInfo, TheFile, SM);
if (!Range.isValid())
return true;
// Wrap given range in do catch block.
EditConsumer.accept(SM, Range.getStart(), "do {\n");
EditorConsumerInsertStream OS(EditConsumer, SM, Range.getEnd());
OS << "\n} catch {\n" << getCodePlaceholder() << "\n}";
// Delete ! from try! expression
auto ExclaimLen = getKeywordLen(tok::exclaim_postfix);
auto ExclaimRange = CharSourceRange(TryExpr->getExclaimLoc(), ExclaimLen);
EditConsumer.remove(SM, ExclaimRange);
return false;
}
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