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66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
//===- LayoutConstraint.cpp - Layout constraints types and APIs -*- 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 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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//
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// This file implements APIs for layout constraints.
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//
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//===----------------------------------------------------------------------===//
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#include "swift/AST/ASTContext.h"
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#include "swift/AST/Decl.h"
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#include "swift/AST/Types.h"
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namespace swift {
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/// This helper function is typically used by the parser to
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/// map a type name to a corresponding layout constraint if possible.
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LayoutConstraintInfo getLayoutConstraintInfo(Identifier ID, ASTContext &Ctx) {
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if (ID == Ctx.Id_TrivialLayout)
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return LayoutConstraintInfo(LayoutConstraintKind::TrivialOfExactSize, 0, 0);
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if (ID == Ctx.Id_TrivialAtMostLayout)
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return LayoutConstraintInfo(LayoutConstraintKind::TrivialOfAtMostSize, 0,
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0);
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if (ID == Ctx.Id_RefCountedObjectLayout)
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return LayoutConstraintInfo(LayoutConstraintKind::RefCountedObject);
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if (ID == Ctx.Id_NativeRefCountedObjectLayout)
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return LayoutConstraintInfo(LayoutConstraintKind::NativeRefCountedObject);
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return LayoutConstraintInfo(LayoutConstraintKind::UnknownLayout);
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}
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StringRef LayoutConstraintInfo::getName() const {
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return getName(getKind());
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}
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StringRef LayoutConstraintInfo::getName(LayoutConstraintKind Kind) {
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switch (Kind) {
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case LayoutConstraintKind::UnknownLayout:
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return "_UnknownLayout";
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case LayoutConstraintKind::RefCountedObject:
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return "_RefCountedObject";
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case LayoutConstraintKind::NativeRefCountedObject:
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return "_NativeRefCountedObject";
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case LayoutConstraintKind::Trivial:
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return "_Trivial";
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case LayoutConstraintKind::TrivialOfAtMostSize:
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return "_TrivialAtMost";
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case LayoutConstraintKind::TrivialOfExactSize:
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return "_Trivial";
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}
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}
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SourceRange LayoutConstraintLoc::getSourceRange() const { return getLoc(); }
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} // end namespace swift
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