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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
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
//===--- CaptureInfo.h - Data Structure for Capture Lists -------*- C++ -*-===//
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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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#ifndef SWIFT_AST_CAPTURE_INFO_H
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#define SWIFT_AST_CAPTURE_INFO_H
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#include "swift/Basic/LLVM.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/PointerIntPair.h"
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#include <vector>
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namespace llvm {
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class raw_ostream;
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}
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namespace swift {
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class ValueDecl;
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class FuncDecl;
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/// \brief Stores information about captured variables.
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class CaptureInfo {
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ArrayRef<ValueDecl *> Captures;
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public:
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bool empty() { return Captures.empty(); }
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ArrayRef<ValueDecl *> getCaptures() const { return Captures; }
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void setCaptures(ArrayRef<ValueDecl *> C) { Captures = C; }
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typedef llvm::PointerIntPair<ValueDecl*, 1, bool> LocalCaptureTy;
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/// \brief Return a filtered list of the captures for this function,
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/// filtering out global variables. This function returns the list that
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/// actually needs to be closed over.
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///
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/// In addition to the decl in question, this also includes a bool which
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/// indicates whether this is a "direct" capture: a capture of a vardecl
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/// address, even though the vardecl also has accessors.
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void getLocalCaptures(const FuncDecl *Context,
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SmallVectorImpl<LocalCaptureTy> &Result) const;
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/// \returns true if getLocalCaptures() will return a non-empty list.
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bool hasLocalCaptures() const;
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void dump() const;
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void print(raw_ostream &OS) const;
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};
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} // namespace swift
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#endif // LLVM_SWIFT_AST_CAPTURE_INFO_H
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