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1d961ba22d
Although I don't plan to bring over new assertions wholesale into the current qualification branch, it's entirely possible that various minor changes in main will use the new assertions; having this basic support in the release branch will simplify that. (This is why I'm adding the includes as a separate pass from rewriting the individual assertions)
64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
//===--- ExitableFullExpr.h - An exitable full-expression -------*- 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 - 2017 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 https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines ExitableFullExpr, a cleanup scope RAII object
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// that conveniently creates a continuation block.
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//
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//===----------------------------------------------------------------------===//
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#ifndef EXITABLE_FULL_EXPR_H
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#define EXITABLE_FULL_EXPR_H
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#include "JumpDest.h"
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#include "Scope.h"
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#include "swift/Basic/Assertions.h"
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namespace swift {
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namespace Lowering {
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/// A cleanup scope RAII object, like FullExpr, that comes with a
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/// JumpDest for a continuation block.
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///
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/// You *must* call exit() at some point.
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///
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/// This scope is also exposed to the debug info.
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class LLVM_LIBRARY_VISIBILITY ExitableFullExpr {
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SILGenFunction &SGF;
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FullExpr Scope;
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JumpDest ExitDest;
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public:
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explicit ExitableFullExpr(SILGenFunction &SGF, CleanupLocation loc)
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: SGF(SGF), Scope(SGF.Cleanups, loc),
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ExitDest(SGF.B.splitBlockForFallthrough(),
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SGF.Cleanups.getCleanupsDepth(), loc) {
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SGF.enterDebugScope(loc);
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}
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~ExitableFullExpr() {
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SGF.leaveDebugScope();
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}
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JumpDest getExitDest() const { return ExitDest; }
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SILBasicBlock *exit() {
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assert(!SGF.B.hasValidInsertionPoint());
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Scope.pop();
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SGF.B.setInsertionPoint(ExitDest.getBlock());
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return ExitDest.getBlock();
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}
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};
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} // end namespace Lowering
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} // end namespace swift
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#endif
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