зеркало из https://github.com/microsoft/clang-1.git
371 строка
12 KiB
C++
371 строка
12 KiB
C++
//===--- TypeLoc.cpp - Type Source Info Wrapper -----------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the TypeLoc subclasses implementations.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/TypeLoc.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Expr.h"
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#include "clang/AST/TypeLocVisitor.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// TypeLoc Implementation
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//===----------------------------------------------------------------------===//
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namespace {
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class TypeLocRanger : public TypeLocVisitor<TypeLocRanger, SourceRange> {
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public:
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#define ABSTRACT_TYPELOC(CLASS, PARENT)
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#define TYPELOC(CLASS, PARENT) \
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SourceRange Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
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return TyLoc.getLocalSourceRange(); \
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}
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#include "clang/AST/TypeLocNodes.def"
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};
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}
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SourceRange TypeLoc::getLocalSourceRangeImpl(TypeLoc TL) {
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if (TL.isNull()) return SourceRange();
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return TypeLocRanger().Visit(TL);
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}
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namespace {
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class TypeSizer : public TypeLocVisitor<TypeSizer, unsigned> {
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public:
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#define ABSTRACT_TYPELOC(CLASS, PARENT)
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#define TYPELOC(CLASS, PARENT) \
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unsigned Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
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return TyLoc.getFullDataSize(); \
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}
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#include "clang/AST/TypeLocNodes.def"
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};
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}
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/// \brief Returns the size of the type source info data block.
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unsigned TypeLoc::getFullDataSizeForType(QualType Ty) {
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if (Ty.isNull()) return 0;
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return TypeSizer().Visit(TypeLoc(Ty, 0));
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}
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namespace {
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class NextLoc : public TypeLocVisitor<NextLoc, TypeLoc> {
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public:
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#define ABSTRACT_TYPELOC(CLASS, PARENT)
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#define TYPELOC(CLASS, PARENT) \
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TypeLoc Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
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return TyLoc.getNextTypeLoc(); \
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}
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#include "clang/AST/TypeLocNodes.def"
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};
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}
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/// \brief Get the next TypeLoc pointed by this TypeLoc, e.g for "int*" the
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/// TypeLoc is a PointerLoc and next TypeLoc is for "int".
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TypeLoc TypeLoc::getNextTypeLocImpl(TypeLoc TL) {
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return NextLoc().Visit(TL);
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}
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/// \brief Initializes a type location, and all of its children
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/// recursively, as if the entire tree had been written in the
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/// given location.
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void TypeLoc::initializeImpl(ASTContext &Context, TypeLoc TL,
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SourceLocation Loc) {
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while (true) {
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switch (TL.getTypeLocClass()) {
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#define ABSTRACT_TYPELOC(CLASS, PARENT)
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#define TYPELOC(CLASS, PARENT) \
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case CLASS: { \
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CLASS##TypeLoc TLCasted = TL.castAs<CLASS##TypeLoc>(); \
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TLCasted.initializeLocal(Context, Loc); \
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TL = TLCasted.getNextTypeLoc(); \
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if (!TL) return; \
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continue; \
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}
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#include "clang/AST/TypeLocNodes.def"
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}
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}
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}
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SourceLocation TypeLoc::getBeginLoc() const {
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TypeLoc Cur = *this;
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TypeLoc LeftMost = Cur;
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while (true) {
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switch (Cur.getTypeLocClass()) {
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case Elaborated:
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LeftMost = Cur;
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break;
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case FunctionProto:
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if (Cur.castAs<FunctionProtoTypeLoc>().getTypePtr()
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->hasTrailingReturn()) {
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LeftMost = Cur;
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break;
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}
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/* Fall through */
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case FunctionNoProto:
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case ConstantArray:
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case DependentSizedArray:
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case IncompleteArray:
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case VariableArray:
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// FIXME: Currently QualifiedTypeLoc does not have a source range
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case Qualified:
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Cur = Cur.getNextTypeLoc();
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continue;
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default:
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if (!Cur.getLocalSourceRange().getBegin().isInvalid())
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LeftMost = Cur;
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Cur = Cur.getNextTypeLoc();
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if (Cur.isNull())
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break;
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continue;
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} // switch
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break;
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} // while
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return LeftMost.getLocalSourceRange().getBegin();
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}
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SourceLocation TypeLoc::getEndLoc() const {
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TypeLoc Cur = *this;
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TypeLoc Last;
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while (true) {
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switch (Cur.getTypeLocClass()) {
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default:
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if (!Last)
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Last = Cur;
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return Last.getLocalSourceRange().getEnd();
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case Paren:
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case ConstantArray:
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case DependentSizedArray:
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case IncompleteArray:
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case VariableArray:
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case FunctionNoProto:
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Last = Cur;
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break;
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case FunctionProto:
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if (Cur.castAs<FunctionProtoTypeLoc>().getTypePtr()->hasTrailingReturn())
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Last = TypeLoc();
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else
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Last = Cur;
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break;
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case Pointer:
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case BlockPointer:
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case MemberPointer:
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case LValueReference:
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case RValueReference:
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case PackExpansion:
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if (!Last)
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Last = Cur;
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break;
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case Qualified:
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case Elaborated:
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break;
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}
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Cur = Cur.getNextTypeLoc();
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}
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}
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namespace {
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struct TSTChecker : public TypeLocVisitor<TSTChecker, bool> {
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// Overload resolution does the real work for us.
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static bool isTypeSpec(TypeSpecTypeLoc _) { return true; }
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static bool isTypeSpec(TypeLoc _) { return false; }
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#define ABSTRACT_TYPELOC(CLASS, PARENT)
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#define TYPELOC(CLASS, PARENT) \
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bool Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
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return isTypeSpec(TyLoc); \
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}
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#include "clang/AST/TypeLocNodes.def"
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};
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}
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/// \brief Determines if the given type loc corresponds to a
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/// TypeSpecTypeLoc. Since there is not actually a TypeSpecType in
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/// the type hierarchy, this is made somewhat complicated.
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///
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/// There are a lot of types that currently use TypeSpecTypeLoc
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/// because it's a convenient base class. Ideally we would not accept
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/// those here, but ideally we would have better implementations for
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/// them.
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bool TypeSpecTypeLoc::isKind(const TypeLoc &TL) {
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if (TL.getType().hasLocalQualifiers()) return false;
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return TSTChecker().Visit(TL);
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}
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// Reimplemented to account for GNU/C++ extension
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// typeof unary-expression
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// where there are no parentheses.
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SourceRange TypeOfExprTypeLoc::getLocalSourceRange() const {
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if (getRParenLoc().isValid())
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return SourceRange(getTypeofLoc(), getRParenLoc());
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else
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return SourceRange(getTypeofLoc(),
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getUnderlyingExpr()->getSourceRange().getEnd());
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}
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TypeSpecifierType BuiltinTypeLoc::getWrittenTypeSpec() const {
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if (needsExtraLocalData())
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return static_cast<TypeSpecifierType>(getWrittenBuiltinSpecs().Type);
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switch (getTypePtr()->getKind()) {
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case BuiltinType::Void:
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return TST_void;
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case BuiltinType::Bool:
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return TST_bool;
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case BuiltinType::Char_U:
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case BuiltinType::Char_S:
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return TST_char;
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case BuiltinType::Char16:
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return TST_char16;
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case BuiltinType::Char32:
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return TST_char32;
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case BuiltinType::WChar_S:
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case BuiltinType::WChar_U:
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return TST_wchar;
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case BuiltinType::UChar:
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case BuiltinType::UShort:
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case BuiltinType::UInt:
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case BuiltinType::ULong:
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case BuiltinType::ULongLong:
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case BuiltinType::UInt128:
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case BuiltinType::SChar:
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case BuiltinType::Short:
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case BuiltinType::Int:
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case BuiltinType::Long:
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case BuiltinType::LongLong:
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case BuiltinType::Int128:
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case BuiltinType::Half:
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case BuiltinType::Float:
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case BuiltinType::Double:
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case BuiltinType::LongDouble:
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llvm_unreachable("Builtin type needs extra local data!");
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// Fall through, if the impossible happens.
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case BuiltinType::NullPtr:
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case BuiltinType::Overload:
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case BuiltinType::Dependent:
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case BuiltinType::BoundMember:
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case BuiltinType::UnknownAny:
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case BuiltinType::ARCUnbridgedCast:
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case BuiltinType::PseudoObject:
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case BuiltinType::ObjCId:
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case BuiltinType::ObjCClass:
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case BuiltinType::ObjCSel:
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case BuiltinType::OCLImage1d:
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case BuiltinType::OCLImage1dArray:
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case BuiltinType::OCLImage1dBuffer:
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case BuiltinType::OCLImage2d:
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case BuiltinType::OCLImage2dArray:
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case BuiltinType::OCLImage3d:
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case BuiltinType::OCLSampler:
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case BuiltinType::OCLEvent:
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case BuiltinType::BuiltinFn:
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return TST_unspecified;
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}
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llvm_unreachable("Invalid BuiltinType Kind!");
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}
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TypeLoc TypeLoc::IgnoreParensImpl(TypeLoc TL) {
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while (ParenTypeLoc PTL = TL.getAs<ParenTypeLoc>())
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TL = PTL.getInnerLoc();
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return TL;
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}
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void ElaboratedTypeLoc::initializeLocal(ASTContext &Context,
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SourceLocation Loc) {
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setElaboratedKeywordLoc(Loc);
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NestedNameSpecifierLocBuilder Builder;
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Builder.MakeTrivial(Context, getTypePtr()->getQualifier(), Loc);
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setQualifierLoc(Builder.getWithLocInContext(Context));
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}
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void DependentNameTypeLoc::initializeLocal(ASTContext &Context,
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SourceLocation Loc) {
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setElaboratedKeywordLoc(Loc);
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NestedNameSpecifierLocBuilder Builder;
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Builder.MakeTrivial(Context, getTypePtr()->getQualifier(), Loc);
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setQualifierLoc(Builder.getWithLocInContext(Context));
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setNameLoc(Loc);
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}
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void
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DependentTemplateSpecializationTypeLoc::initializeLocal(ASTContext &Context,
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SourceLocation Loc) {
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setElaboratedKeywordLoc(Loc);
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if (getTypePtr()->getQualifier()) {
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NestedNameSpecifierLocBuilder Builder;
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Builder.MakeTrivial(Context, getTypePtr()->getQualifier(), Loc);
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setQualifierLoc(Builder.getWithLocInContext(Context));
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} else {
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setQualifierLoc(NestedNameSpecifierLoc());
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}
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setTemplateKeywordLoc(Loc);
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setTemplateNameLoc(Loc);
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setLAngleLoc(Loc);
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setRAngleLoc(Loc);
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TemplateSpecializationTypeLoc::initializeArgLocs(Context, getNumArgs(),
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getTypePtr()->getArgs(),
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getArgInfos(), Loc);
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}
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void TemplateSpecializationTypeLoc::initializeArgLocs(ASTContext &Context,
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unsigned NumArgs,
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const TemplateArgument *Args,
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TemplateArgumentLocInfo *ArgInfos,
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SourceLocation Loc) {
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for (unsigned i = 0, e = NumArgs; i != e; ++i) {
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switch (Args[i].getKind()) {
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case TemplateArgument::Null:
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case TemplateArgument::Declaration:
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case TemplateArgument::Integral:
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case TemplateArgument::NullPtr:
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llvm_unreachable("Impossible TemplateArgument");
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case TemplateArgument::Expression:
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ArgInfos[i] = TemplateArgumentLocInfo(Args[i].getAsExpr());
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break;
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case TemplateArgument::Type:
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ArgInfos[i] = TemplateArgumentLocInfo(
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Context.getTrivialTypeSourceInfo(Args[i].getAsType(),
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Loc));
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break;
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case TemplateArgument::Template:
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case TemplateArgument::TemplateExpansion: {
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NestedNameSpecifierLocBuilder Builder;
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TemplateName Template = Args[i].getAsTemplate();
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if (DependentTemplateName *DTN = Template.getAsDependentTemplateName())
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Builder.MakeTrivial(Context, DTN->getQualifier(), Loc);
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else if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName())
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Builder.MakeTrivial(Context, QTN->getQualifier(), Loc);
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ArgInfos[i] = TemplateArgumentLocInfo(
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Builder.getWithLocInContext(Context),
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Loc,
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Args[i].getKind() == TemplateArgument::Template
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? SourceLocation()
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: Loc);
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break;
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}
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case TemplateArgument::Pack:
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ArgInfos[i] = TemplateArgumentLocInfo();
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break;
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}
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}
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}
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