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bc005219d1
Most of the complexity here is teaching SILGen how to handle closed-over direct accesses to observing properties, since all of the getter/setter/willSet/didSet members of the property are actually full closures when in a function body. We generate correct but really terrible code here, since the setter captures the willset/didset members themselves. I'm not worrying about the performance of this construct though, functionality is what matters. Swift SVN r13778
64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
//===--- CaptureInfo.cpp - Data Structure for Capture Lists ---------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/AST/CaptureInfo.h"
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#include "swift/AST/Decl.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace swift;
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bool CaptureInfo::hasLocalCaptures() const {
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for (auto VD : getCaptures())
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if (VD->getDeclContext()->isLocalContext())
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return true;
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return false;
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}
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void CaptureInfo::getLocalCaptures(const FuncDecl *FuncContext,
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SmallVectorImpl<LocalCaptureTy> &Result) const {
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if (!hasLocalCaptures()) return;
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Result.reserve(Captures.size());
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// Filter out global variables.
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for (auto VD : Captures) {
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if (!VD->getDeclContext()->isLocalContext())
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continue;
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// Determine whether this is a direct capture. This is a direct capture
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// if we're looking at an accessor capturing its underlying decl.
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bool isDirectCapture = false;
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if (FuncContext)
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if (auto *ASD = FuncContext->getAccessorStorageDecl())
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if (ASD == VD)
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isDirectCapture = true;
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Result.push_back({VD, isDirectCapture} );
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}
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}
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void CaptureInfo::dump() const {
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print(llvm::errs());
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llvm::errs() << '\n';
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}
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void CaptureInfo::print(raw_ostream &OS) const {
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OS << "captures=(";
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OS << getCaptures()[0]->getName();
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for (auto VD : getCaptures().slice(1)) {
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OS << ", " << VD->getName();
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}
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OS << ')';
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}
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