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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 "AsyncRefactoring.h"
using namespace swift;
using namespace swift::refactoring::asyncrefactorings;
void ReferenceCollector::collect(ASTNode Target, BraceStmt *Scope,
SourceFile &SF,
llvm::DenseSet<const Decl *> &Decls) {
ReferenceCollector Collector(Target, &SF.getASTContext().SourceMgr, Decls);
if (Scope)
Collector.walk(Scope);
else
Collector.walk(SF);
}
bool ReferenceCollector::walkToDeclPre(Decl *D, CharSourceRange Range) {
// Bit of a hack, include all contexts so they're never renamed (seems worse
// to rename a class/function than it does a variable). Again, an
// over-approximation, but hopefully doesn't come up too often.
if (isa<DeclContext>(D) && !D->isImplicit()) {
ReferencedDecls.insert(D);
}
if (AfterTarget && !D->isImplicit()) {
DeclaredDecls.insert(D);
} else if (D == Target.dyn_cast<Decl *>()) {
AfterTarget = true;
}
return shouldWalkInto(D->getSourceRange());
}
bool ReferenceCollector::walkToExprPre(Expr *E) {
if (AfterTarget && !E->isImplicit()) {
if (auto *DRE = dyn_cast<DeclRefExpr>(E)) {
if (auto *D = DRE->getDecl()) {
// Only care about references that aren't declared, as seen decls will
// be renamed (if necessary) during the refactoring.
if (!D->isImplicit() && !DeclaredDecls.count(D)) {
ReferencedDecls.insert(D);
// Also add the async alternative of a function to prevent
// collisions if a call is replaced with the alternative.
if (auto *AFD = dyn_cast<AbstractFunctionDecl>(D)) {
if (auto *Alternative = AFD->getAsyncAlternative())
ReferencedDecls.insert(Alternative);
}
}
}
}
} else if (E == Target.dyn_cast<Expr *>()) {
AfterTarget = true;
}
return shouldWalkInto(E->getSourceRange());
}
bool ReferenceCollector::walkToStmtPre(Stmt *S) {
if (S == Target.dyn_cast<Stmt *>())
AfterTarget = true;
return shouldWalkInto(S->getSourceRange());
}
bool ReferenceCollector::walkToPatternPre(Pattern *P) {
if (P == Target.dyn_cast<Pattern *>())
AfterTarget = true;
return shouldWalkInto(P->getSourceRange());
}
bool ReferenceCollector::shouldWalkInto(SourceRange Range) {
return AfterTarget ||
(SM && SM->rangeContainsTokenLoc(Range, Target.getStartLoc()));
}
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