Addeed generator for the cast methods.

Done with: erikv

src/tools/cplusplus/Main.cpp

@@ -0,0 +1,239 @@
+
+#include <QCoreApplication>
+#include <QStringList>
+#include <QTextDocument>
+#include <QTextCursor>
+#include <QTextBlock>
+#include <QDebug>
+
+#include <Control.h>
+#include <Parser.h>
+#include <AST.h>
+#include <ASTVisitor.h>
+#include <Symbols.h>
+#include <CoreTypes.h>
+#include <Literals.h>
+#include <CppDocument.h>
+#include <Overview.h>
+
+#include <iostream>
+#include <cstdlib>
+
+using namespace CPlusPlus;
+
+class ASTNodes
+{
+public:
+    ASTNodes(): base(0) {}
+
+    ClassSpecifierAST *base; // points to "class AST"
+    QList<ClassSpecifierAST *> deriveds; // n where n extends AST
+    QList<QTextCursor> endOfPublicClassSpecifiers;
+};
+
+class FindASTNodes: protected ASTVisitor
+{
+public:
+    FindASTNodes(Document::Ptr doc, QTextDocument *document)
+        : ASTVisitor(doc->control()), document(document)
+    {
+    }
+
+    ASTNodes operator()(AST *ast)
+    {
+        accept(ast);
+        return _nodes;
+    }
+
+protected:
+    virtual bool visit(ClassSpecifierAST *ast)
+    {
+        Class *klass = ast->symbol;
+        Q_ASSERT(klass != 0);
+
+        const QString className = oo(klass->name());
+
+        if (className.endsWith("AST")) {
+            if (className == QLatin1String("AST"))
+                _nodes.base = ast;
+            else {
+                _nodes.deriveds.append(ast);
+
+                AccessDeclarationAST *accessDeclaration = 0;
+                for (DeclarationListAST *it = ast->member_specifiers; it; it = it->next) {
+                    if (AccessDeclarationAST *decl = it->declaration->asAccessDeclaration()) {
+                        if (tokenKind(decl->access_specifier_token) == T_PUBLIC)
+                            accessDeclaration = decl;
+                    }
+                }
+
+                if (! accessDeclaration)
+                    qDebug() << "no access declaration for class:" << className;
+
+                Q_ASSERT(accessDeclaration != 0);
+
+                unsigned endLine, endColumn;
+                getTokenEndPosition(accessDeclaration->lastToken() - 1, &endLine, &endColumn);
+
+                QTextCursor tc(document);
+                tc.setPosition(document->findBlockByNumber(endLine - 1).position() + endColumn - 1);
+
+                int charsToSkip = 0;
+                forever {
+                    QChar ch = document->characterAt(tc.position() + charsToSkip);
+                    if (! ch.isSpace())
+                        break;
+
+                    ++charsToSkip;
+
+                    if (ch == QChar::ParagraphSeparator)
+                        break;
+                }
+
+                tc.setPosition(tc.position() + charsToSkip);
+
+                _nodes.endOfPublicClassSpecifiers.append(tc);
+            }
+        }
+
+        return true;
+    }
+
+private:
+    QTextDocument *document;
+    ASTNodes _nodes;
+    Overview oo;
+};
+
+class RemoveCastMethods: protected ASTVisitor
+{
+public:
+    RemoveCastMethods(Document::Ptr doc, QTextDocument *document)
+        : ASTVisitor(doc->control()), document(document) {}
+
+    QList<QTextCursor> operator()(AST *ast)
+    {
+        _cursors.clear();
+        accept(ast);
+        return _cursors;
+    }
+
+protected:
+    virtual bool visit(FunctionDefinitionAST *ast)
+    {
+        Function *fun = ast->symbol;
+        const QString functionName = oo(fun->name());
+
+        if (functionName.length() > 3 && functionName.startsWith(QLatin1String("as"))
+            && functionName.at(2).isUpper()) {
+            unsigned startLine, startColumn, endLine, endColumn;
+            getTokenStartPosition(ast->firstToken(), &startLine, &startColumn);
+            getTokenEndPosition(ast->lastToken() - 1, &endLine, &endColumn);
+
+            QTextCursor tc(document);
+            tc.setPosition(document->findBlockByNumber(startLine - 1).position());
+            tc.setPosition(document->findBlockByNumber(endLine - 1).position() + endColumn - 1,
+                           QTextCursor::KeepAnchor);
+
+            int charsToSkip = 0;
+            forever {
+                QChar ch = document->characterAt(tc.position() + charsToSkip);
+
+                if (! ch.isSpace())
+                    break;
+
+                ++charsToSkip;
+
+                if (ch == QChar::ParagraphSeparator)
+                    break;
+            }
+
+            tc.setPosition(tc.position() + charsToSkip, QTextCursor::KeepAnchor);
+
+            //qDebug() << qPrintable(tc.selectedText());
+            _cursors.append(tc);
+        }
+
+        return true;
+    }
+
+private:
+    QTextDocument *document;
+    QList<QTextCursor> _cursors;
+    Overview oo;
+};
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication app(argc, argv);
+    QStringList files = app.arguments();
+    files.removeFirst();
+
+    if (files.isEmpty()) {
+        std::cerr << "Usage: cplusplus AST.h" << std::endl;
+        return EXIT_FAILURE;
+    }
+
+    Snapshot snapshot;
+
+    //const QString configuration = QLatin1String("#define CPLUSPLUS_EXPORT\n");
+
+    foreach (const QString &fileName, files) {
+        QFile file(fileName);
+        if (! file.open(QFile::ReadOnly))
+            continue;
+
+        const QString source = QTextStream(&file).readAll();
+        QTextDocument document;
+        document.setPlainText(source);
+
+        Document::Ptr doc = Document::create(fileName);
+        //doc->control()->setDiagnosticClient(0);
+        const QByteArray preprocessedCode = snapshot.preprocessedCode(source, fileName);
+        doc->setSource(preprocessedCode);
+        doc->check();
+
+        FindASTNodes process(doc, &document);
+        ASTNodes astNodes = process(doc->translationUnit()->ast());
+
+        RemoveCastMethods removeCastMethods(doc, &document);
+
+        QList<QTextCursor> baseCastMethodCursors = removeCastMethods(astNodes.base);
+        QMap<ClassSpecifierAST *, QList<QTextCursor> > cursors;
+        QMap<ClassSpecifierAST *, QString> replacementCastMethods;
+
+        Overview oo;
+
+        QStringList castMethods;
+        foreach (ClassSpecifierAST *classAST, astNodes.deriveds) {
+            cursors[classAST] = removeCastMethods(classAST);
+            const QString className = oo(classAST->symbol->name());
+            const QString methodName = QLatin1String("as") + className.mid(0, className.length() - 3);
+            replacementCastMethods[classAST] = QString("    virtual %1 *%2() { return this; }\n").arg(className, methodName);
+            castMethods.append(QString("    virtual %1 *%2() { return 0; }").arg(className, methodName));
+        }
+
+        if (! baseCastMethodCursors.isEmpty()) {
+            castMethods.sort();
+            for (int i = 0; i < baseCastMethodCursors.length(); ++i) {
+                baseCastMethodCursors[i].removeSelectedText();
+            }
+
+            baseCastMethodCursors.first().insertText(castMethods.join(QLatin1String("\n")));
+        }
+
+        for (int classIndex = 0; classIndex < astNodes.deriveds.size(); ++classIndex) {
+            ClassSpecifierAST *classAST = astNodes.deriveds.at(classIndex);
+
+            // remove the cast methods.
+            QList<QTextCursor> c = cursors.value(classAST);
+            for (int i = 0; i < c.length(); ++i) {
+                c[i].removeSelectedText();
+            }
+
+            astNodes.endOfPublicClassSpecifiers[classIndex].insertText(replacementCastMethods.value(classAST));
+        }
+
+        std::cout << qPrintable(document.toPlainText());
+    }
+}

src/tools/cplusplus/cplusplus.pro

@@ -0,0 +1,15 @@
+######################################################################
+# Automatically generated by qmake (2.01a) Mon Nov 9 11:48:58 2009
+######################################################################
+
+QT = core gui
+macx:CONFIG -= app_bundle
+TEMPLATE = app
+TARGET = 
+DEPENDPATH += .
+INCLUDEPATH += .
+
+include(../../libs/cplusplus/cplusplus-lib.pri)
+
+# Input
+SOURCES += Main.cpp