Initial import

src/libs/cplusplus/NameOfExpression.cpp

@@ -0,0 +1,438 @@
+/***************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact:  Qt Software Information (qt-info@nokia.com)
+**
+** 
+** Non-Open Source Usage  
+** 
+** Licensees may use this file in accordance with the Qt Beta Version
+** License Agreement, Agreement version 2.2 provided with the Software or,
+** alternatively, in accordance with the terms contained in a written
+** agreement between you and Nokia.  
+** 
+** GNU General Public License Usage 
+** 
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the packaging
+** of this file.  Please review the following information to ensure GNU
+** General Public Licensing requirements will be met:
+**
+** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt GPL Exception version
+** 1.2, included in the file GPL_EXCEPTION.txt in this package.  
+** 
+***************************************************************************/
+
+#include "NameOfExpression.h"
+#include "LookupContext.h"
+
+#include <cplusplus/Overview.h>
+#include <Control.h>
+#include <AST.h>
+#include <Scope.h>
+#include <Names.h>
+#include <Symbols.h>
+#include <Literals.h>
+#include <CoreTypes.h>
+#include <TypeVisitor.h>
+#include <NameVisitor.h>
+#include <QList>
+#include <QtDebug>
+
+using namespace CPlusPlus;
+
+NameOfExpression::NameOfExpression(const LookupContext &context)
+    : ASTVisitor(context.expressionDocument()->control()),
+      _context(context),
+      sem(_context.control())
+{ }
+
+NameOfExpression::~NameOfExpression()
+{ }
+
+QList<FullySpecifiedType> ResolveExpression::operator()(ExpressionAST *ast)
+{
+    QList<FullySpecifiedType> previousResolvedSymbols = switchResolvedSymbols(QList<FullySpecifiedType>());
+    accept(ast);
+    return switchResolvedSymbols(previousResolvedSymbols);
+}
+
+QList<FullySpecifiedType> ResolveExpression::switchResolvedSymbols(const QList<FullySpecifiedType> &symbols)
+{
+    QList<FullySpecifiedType> previousResolvedSymbols = _resolvedSymbols;
+    _resolvedSymbols = symbols;
+    return previousResolvedSymbols;
+}
+
+bool ResolveExpression::visit(ExpressionListAST *)
+{
+    // nothing to do.
+    return false;
+}
+
+bool ResolveExpression::visit(BinaryExpressionAST *)
+{
+    // nothing to do.
+    return false;
+}
+
+bool ResolveExpression::visit(CastExpressionAST *)
+{
+    // nothing to do.
+    return false;
+}
+
+bool ResolveExpression::visit(ConditionAST *)
+{
+    // nothing to do.
+    return false;
+}
+
+bool ResolveExpression::visit(ConditionalExpressionAST *)
+{
+    // nothing to do.
+    return false;
+}
+
+bool ResolveExpression::visit(CppCastExpressionAST *)
+{
+    // ### resolve ast->type_id
+    return false;
+}
+
+bool ResolveExpression::visit(DeleteExpressionAST *)
+{
+    // nothing to do.
+    return false;
+}
+
+bool ResolveExpression::visit(ArrayInitializerAST *)
+{
+    // nothing to do.
+    return false;
+}
+
+bool ResolveExpression::visit(NewExpressionAST *)
+{
+    // nothing to do.
+    return false;
+}
+
+bool ResolveExpression::visit(TypeidExpressionAST *)
+{
+    // nothing to do.
+    return false;
+}
+
+bool ResolveExpression::visit(TypenameCallExpressionAST *)
+{
+    // nothing to do
+    return false;
+}
+
+bool ResolveExpression::visit(TypeConstructorCallAST *)
+{
+    // nothing to do.
+    return false;
+}
+
+bool ResolveExpression::visit(PostfixExpressionAST *ast)
+{
+    accept(ast->base_expression);
+
+    for (PostfixAST *fx = ast->postfix_expressions; fx; fx = fx->next) {
+        accept(fx);
+    }
+
+    return false;
+}
+
+bool ResolveExpression::visit(SizeofExpressionAST *)
+{
+    FullySpecifiedType ty(control()->integerType(IntegerType::Int));
+    ty.setUnsigned(true);
+    _resolvedSymbols.append(ty);
+    return false;
+}
+
+bool ResolveExpression::visit(NumericLiteralAST *)
+{
+    _resolvedSymbols.append(control()->integerType(IntegerType::Int)); // ### handle short, long, floats, ...
+    return false;
+}
+
+bool ResolveExpression::visit(BoolLiteralAST *)
+{
+    _resolvedSymbols.append(control()->integerType(IntegerType::Bool));
+    return false;
+}
+
+bool ResolveExpression::visit(ThisExpressionAST *)
+{
+    if (! _context.symbol())
+        return false;
+
+    Scope *scope = _context.symbol()->scope();
+    for (; scope; scope = scope->enclosingScope()) {
+        if (scope->isFunctionScope()) {
+            Function *fun = scope->owner()->asFunction();
+            if (Scope *cscope = scope->enclosingClassScope()) {
+                Class *klass = cscope->owner()->asClass();
+                FullySpecifiedType classTy(control()->namedType(klass->name()));
+                FullySpecifiedType ptrTy(control()->pointerType(classTy));
+                _resolvedSymbols.append(ptrTy);
+                break;
+            } else if (QualifiedNameId *q = fun->name()->asQualifiedNameId()) {
+                Name *nestedNameSpecifier = 0;
+                if (q->nameCount() == 2)
+                    nestedNameSpecifier = q->nameAt(0);
+                else
+                    nestedNameSpecifier = control()->qualifiedNameId(&q->names()[0], q->nameCount() - 1);
+                FullySpecifiedType classTy(control()->namedType(nestedNameSpecifier));
+                FullySpecifiedType ptrTy(control()->pointerType(classTy));
+                _resolvedSymbols.append(ptrTy);
+                break;
+            }
+        }
+    }
+    return false;
+}
+
+bool ResolveExpression::visit(NestedExpressionAST *ast)
+{
+    accept(ast->expression);
+    return false;
+}
+
+bool ResolveExpression::visit(StringLiteralAST *)
+{
+    FullySpecifiedType charTy = control()->integerType(IntegerType::Char);
+    charTy.setConst(true);
+    FullySpecifiedType ty(control()->pointerType(charTy));
+    _resolvedSymbols.append(ty);
+    return false;
+}
+
+bool ResolveExpression::visit(ThrowExpressionAST *)
+{
+    return false;
+}
+
+bool ResolveExpression::visit(TypeIdAST *)
+{
+    return false;
+}
+
+bool ResolveExpression::visit(UnaryExpressionAST *ast)
+{
+    accept(ast->expression);
+    unsigned unaryOp = tokenKind(ast->unary_op_token);
+    if (unaryOp == T_AMPER) {
+        QMutableListIterator<FullySpecifiedType> it(_resolvedSymbols);
+        while (it.hasNext()) {
+            FullySpecifiedType ty = it.next();
+            ty.setType(control()->pointerType(ty));
+            it.setValue(ty);
+        }
+    } else if (unaryOp == T_STAR) {
+        QMutableListIterator<FullySpecifiedType> it(_resolvedSymbols);
+        while (it.hasNext()) {
+            FullySpecifiedType ty = it.next();
+            if (PointerType *ptrTy = ty->asPointerType()) {
+                it.setValue(ptrTy->elementType());
+            } else {
+                it.remove();
+            }
+        }
+    }
+    return false;
+}
+
+bool ResolveExpression::visit(QualifiedNameAST *ast)
+{
+    Scope dummy;
+    Name *name = sem.check(ast, &dummy);
+
+    QList<Symbol *> symbols = _context.resolve(name);
+    foreach (Symbol *symbol, symbols) {
+        if (symbol->isTypedef()) {
+            if (NamedType *namedTy = symbol->type()->asNamedType()) {
+                LookupContext symbolContext(symbol, _context);
+                QList<Symbol *> resolvedClasses = symbolContext.resolveClass(namedTy->name());
+                if (resolvedClasses.count()) {
+                    foreach (Symbol *s, resolvedClasses) {
+                        _resolvedSymbols.append(s->type());
+                    }
+                    continue;
+                }
+            }
+        }
+        _resolvedSymbols.append(symbol->type());
+    }
+    return false;
+}
+
+bool ResolveExpression::visit(OperatorFunctionIdAST *)
+{
+    return false;
+}
+
+bool ResolveExpression::visit(ConversionFunctionIdAST *)
+{
+    return false;
+}
+
+bool ResolveExpression::visit(SimpleNameAST *ast)
+{
+    Scope dummy;
+    Name *name = sem.check(ast, &dummy);
+
+    QList<Symbol *> symbols = _context.resolve(name);
+    foreach (Symbol *symbol, symbols)
+        _resolvedSymbols.append(symbol->type());
+
+    return false;
+}
+
+bool ResolveExpression::visit(DestructorNameAST *)
+{
+    FullySpecifiedType ty(control()->voidType());
+    _resolvedSymbols.append(ty);
+    return false;
+}
+
+bool ResolveExpression::visit(TemplateIdAST *ast)
+{
+    Scope dummy;
+    Name *name = sem.check(ast, &dummy);
+
+    QList<Symbol *> symbols = _context.resolve(name);
+    foreach (Symbol *symbol, symbols)
+        _resolvedSymbols.append(symbol->type());
+
+    return false;
+}
+
+bool ResolveExpression::visit(CallAST *)
+{
+    QMutableListIterator<FullySpecifiedType> it(_resolvedSymbols);
+    while (it.hasNext()) {
+        FullySpecifiedType ty = it.next();
+        if (Function *funTy = ty->asFunction()) {
+            it.setValue(funTy->returnType());
+        } else {
+            it.remove();
+        }
+    }
+    return false;
+}
+
+bool ResolveExpression::visit(ArrayAccessAST * /* ast */)
+{
+    QMutableListIterator<FullySpecifiedType> it(_resolvedSymbols);
+    while (it.hasNext()) {
+        FullySpecifiedType ty = it.next();
+        if (PointerType *ptrTy = ty->asPointerType()) {
+            it.setValue(ptrTy->elementType());
+        } else {
+            it.remove();
+        }
+    }
+    return false;
+}
+
+bool ResolveExpression::visit(MemberAccessAST *ast)
+{
+    Scope dummy;
+    Name *memberName = sem.check(ast->member_name, &dummy);
+    unsigned accessOp = tokenKind(ast->access_token);
+
+    Overview overview;
+
+    QList<FullySpecifiedType> candidates = _resolvedSymbols;
+    _resolvedSymbols.clear();
+
+    foreach (FullySpecifiedType ty, candidates) {
+        NamedType *namedTy = 0;
+
+        if (accessOp == T_ARROW) {
+            if (PointerType *ptrTy = ty->asPointerType())
+                namedTy = ptrTy->elementType()->asNamedType();
+        } else if (accessOp == T_DOT) {
+            if (ReferenceType *refTy = ty->asReferenceType())
+                ty = refTy->elementType();
+            namedTy = ty->asNamedType();
+            if (! namedTy) {
+                Function *fun = ty->asFunction();
+                if (fun && (fun->scope()->isBlockScope() || fun->scope()->isNamespaceScope()))
+                    namedTy = fun->returnType()->asNamedType();
+            }
+        }
+
+        if (namedTy) {
+            QList<Symbol *> symbols = _context.resolveClass(namedTy->name());
+            if (symbols.isEmpty())
+                return false;
+
+            Class *klass = symbols.first()->asClass();
+            QList<Scope *> allScopes;
+            QSet<Class *> processed;
+            QList<Class *> todo;
+            todo.append(klass);
+
+            while (! todo.isEmpty()) {
+                Class *klass = todo.last();
+                todo.removeLast();
+
+                if (processed.contains(klass))
+                    continue;
+
+                processed.insert(klass);
+                allScopes.append(klass->members());
+
+                for (unsigned i = 0; i < klass->baseClassCount(); ++i) {
+                    BaseClass *baseClass = klass->baseClassAt(i);
+                    Name *baseClassName = baseClass->name();
+                    QList<Symbol *> baseClasses = _context.resolveClass(baseClassName/*, allScopes*/);
+                    if (baseClasses.isEmpty())
+                        qWarning() << "unresolved base class:" << overview.prettyName(baseClassName);
+                    foreach (Symbol *symbol, baseClasses) {
+                        todo.append(symbol->asClass());
+                    }
+                }
+            }
+
+            QList<Symbol *> candidates = _context.resolve(memberName, allScopes);
+            foreach (Symbol *candidate, candidates) {
+                FullySpecifiedType ty = candidate->type();
+                if (TemplateNameId *templId = namedTy->name()->asTemplateNameId()) {
+                    Substitution subst;
+                    for (unsigned i = 0; i < templId->templateArgumentCount(); ++i) {
+                        FullySpecifiedType templArgTy = templId->templateArgumentAt(i);
+                        if (i < klass->templateParameterCount()) {
+                            subst.append(qMakePair(klass->templateParameterAt(i)->name(),
+                                                   templArgTy));
+                        }
+                    }
+                    Instantiation inst(control(), subst);
+                    ty = inst(ty);
+                }
+                _resolvedSymbols.append(ty);
+            }
+        }
+    }
+    return false;
+}
+
+bool ResolveExpression::visit(PostIncrDecrAST *)
+{
+    return false;
+}