C++: Implement context-aware expand / shrink selection actions.

Implement selection expanding / shrinking, that is aware of C++
semantics, thus giving smart selection changing.

Change-Id: I1386a20597fa6bb85c3aa0d8ddfb87cdb3fd7c38
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/plugins/cppeditor/cppeditor.cpp

@@ -48,6 +48,7 @@
 #include <cpptools/cppcompletionassistprovider.h>
 #include <cpptools/cppeditoroutline.h>
 #include <cpptools/cppmodelmanager.h>
+#include <cpptools/cppselectionchanger.h>
 #include <cpptools/cppsemanticinfo.h>
 #include <cpptools/cpptoolsconstants.h>
 #include <cpptools/cpptoolsplugin.h>
@@ -55,6 +56,7 @@
 #include <cpptools/cppworkingcopy.h>
 #include <cpptools/symbolfinder.h>
 
+#include <texteditor/behaviorsettings.h>
 #include <texteditor/completionsettings.h>
 #include <texteditor/convenience.h>
 #include <texteditor/textdocument.h>
@@ -119,6 +121,8 @@ public:
 
     QScopedPointer<FollowSymbolUnderCursor> m_followSymbolUnderCursor;
     QToolButton *m_preprocessorButton;
+
+    CppSelectionChanger m_cppSelectionChanger;
 };
 
 CppEditorWidgetPrivate::CppEditorWidgetPrivate(CppEditorWidget *q)
@@ -130,6 +134,7 @@ CppEditorWidgetPrivate::CppEditorWidgetPrivate(CppEditorWidget *q)
     , m_declDefLinkFinder(new FunctionDeclDefLinkFinder(q))
     , m_followSymbolUnderCursor(new FollowSymbolUnderCursor(q))
     , m_preprocessorButton(0)
+    , m_cppSelectionChanger()
 {
 }
 
@@ -201,6 +206,9 @@ void CppEditorWidget::finalizeInitialization()
     connect(this, &CppEditorWidget::cursorPositionChanged, [this]() {
         if (!d->m_localRenaming.isActive())
             d->m_useSelectionsUpdater.scheduleUpdate();
+
+        // Notify selection expander about the changed cursor.
+        d->m_cppSelectionChanger.onCursorPositionChanged(textCursor());
     });
 
     // Tool bar creation
@@ -328,6 +336,44 @@ void CppEditorWidget::renameUsages(const QString &replacement)
     }
 }
 
+bool CppEditorWidget::selectBlockUp()
+{
+    if (!behaviorSettings().m_smartSelectionChanging)
+        return TextEditorWidget::selectBlockUp();
+
+    QTextCursor cursor = textCursor();
+    d->m_cppSelectionChanger.startChangeSelection();
+    const bool changed =
+            d->m_cppSelectionChanger.changeSelection(
+                CppSelectionChanger::ExpandSelection,
+                cursor,
+                d->m_lastSemanticInfo.doc);
+    if (changed)
+        setTextCursor(cursor);
+    d->m_cppSelectionChanger.stopChangeSelection();
+
+    return changed;
+}
+
+bool CppEditorWidget::selectBlockDown()
+{
+    if (!behaviorSettings().m_smartSelectionChanging)
+        return TextEditorWidget::selectBlockDown();
+
+    QTextCursor cursor = textCursor();
+    d->m_cppSelectionChanger.startChangeSelection();
+    const bool changed =
+            d->m_cppSelectionChanger.changeSelection(
+                CppSelectionChanger::ShrinkSelection,
+                cursor,
+                d->m_lastSemanticInfo.doc);
+    if (changed)
+        setTextCursor(cursor);
+    d->m_cppSelectionChanger.stopChangeSelection();
+
+    return changed;
+}
+
 void CppEditorWidget::renameSymbolUnderCursor()
 {
     d->m_useSelectionsUpdater.abortSchedule();

src/plugins/cppeditor/cppeditor.h

@@ -92,6 +92,9 @@ public slots:
     void renameSymbolUnderCursor();
     void renameUsages(const QString &replacement = QString());
 
+    bool selectBlockUp() override;
+    bool selectBlockDown() override;
+
 protected:
     bool event(QEvent *e) override;
     void contextMenuEvent(QContextMenuEvent *) override;

src/plugins/cpptools/cppselectionchanger.h

+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#ifndef CPPSELECTIONCHANGER_H
+#define CPPSELECTIONCHANGER_H
+
+#include "cpptools_global.h"
+
+#include <cplusplus/ASTPath.h>
+#include <cplusplus/CppDocument.h>
+#include <cplusplus/TranslationUnit.h>
+
+#include <QObject>
+#include <QTextCursor>
+
+namespace CppTools {
+
+class ASTNodePositions {
+public:
+    ASTNodePositions() {}
+    ASTNodePositions(CPlusPlus::AST *_ast) : ast(_ast) {}
+    operator bool() const { return ast; }
+
+    CPlusPlus::AST *ast = 0;
+    unsigned firstTokenIndex = 0;
+    unsigned lastTokenIndex = 0;
+    unsigned secondToLastTokenIndex = 0;
+    int astPosStart = -1;
+    int astPosEnd = -1;
+};
+
+class CPPTOOLS_EXPORT CppSelectionChanger : public QObject
+{
+    Q_OBJECT
+public:
+    explicit CppSelectionChanger(QObject *parent = 0);
+
+    enum Direction {
+        ExpandSelection,
+        ShrinkSelection
+    };
+
+    enum NodeIndexAndStepState {
+        NodeIndexAndStepNotSet,
+        NodeIndexAndStepWholeDocument,
+    };
+
+    bool changeSelection(Direction direction,
+                         QTextCursor &cursorToModify,
+                         const CPlusPlus::Document::Ptr doc);
+    void startChangeSelection();
+    void stopChangeSelection();
+
+public slots:
+    void onCursorPositionChanged(const QTextCursor &newCursor);
+
+protected slots:
+    void fineTuneForStatementPositions(unsigned firstParensTokenIndex,
+                                       unsigned lastParensTokenIndex,
+                                       ASTNodePositions &positions) const;
+
+private:
+    bool performSelectionChange(QTextCursor &cursorToModify);
+    ASTNodePositions getASTPositions(CPlusPlus::AST *ast, const QTextCursor &cursor) const;
+    void updateCursorSelection(QTextCursor &cursorToModify, ASTNodePositions positions);
+
+    int possibleASTStepCount(CPlusPlus::AST *ast) const;
+    int currentASTStep() const;
+    ASTNodePositions findNextASTStepPositions(const QTextCursor &cursor);
+
+    void fineTuneASTNodePositions(ASTNodePositions &positions) const;
+    ASTNodePositions getFineTunedASTPositions(CPlusPlus::AST *ast, const QTextCursor &cursor) const;
+    int getFirstCurrentStepForASTNode(CPlusPlus::AST *ast) const;
+    bool isLastPossibleStepForASTNode(CPlusPlus::AST *ast) const;
+    ASTNodePositions findRelevantASTPositionsFromCursor(const QList<CPlusPlus::AST *> &astPath,
+                                              const QTextCursor &cursor,
+                                              int startingFromNodeIndex = -1);
+    ASTNodePositions findRelevantASTPositionsFromCursorWhenNodeIndexNotSet(
+            const QList<CPlusPlus::AST *> astPath,
+            const QTextCursor &cursor);
+    ASTNodePositions findRelevantASTPositionsFromCursorWhenWholeDocumentSelected(
+            const QList<CPlusPlus::AST *> astPath,
+            const QTextCursor &cursor);
+    ASTNodePositions findRelevantASTPositionsFromCursorFromPreviousNodeIndex(
+            const QList<CPlusPlus::AST *> astPath,
+            const QTextCursor &cursor);
+    bool shouldSkipASTNodeBasedOnPosition(const ASTNodePositions &positions,
+                                          const QTextCursor &cursor) const;
+    void setNodeIndexAndStep(NodeIndexAndStepState state);
+    int getTokenStartCursorPosition(unsigned tokenIndex, const QTextCursor &cursor) const;
+    int getTokenEndCursorPosition(unsigned tokenIndex, const QTextCursor &cursor) const;
+    void printTokenDebugInfo(unsigned tokenIndex, const QTextCursor &cursor, QString prefix) const;
+
+    QTextCursor m_initialChangeSelectionCursor;
+    QTextCursor m_workingCursor;
+    CPlusPlus::Document::Ptr m_doc;
+    CPlusPlus::TranslationUnit *m_unit;
+    Direction m_direction;
+    int m_changeSelectionNodeIndex;
+    int m_nodeCurrentStep;
+    bool m_inChangeSelection;
+};
+
+} // namespace CppTools
+
+#endif // CPPSELECTIONCHANGER_H

src/plugins/cpptools/cpptools.pro

@@ -43,6 +43,7 @@ HEADERS += \
     cppprojectfile.h \
     cppqtstyleindenter.h \
     cpprefactoringchanges.h \
+    cppselectionchanger.h \
     cppsemanticinfo.h \
     cppsemanticinfoupdater.h \
     cppsourceprocessor.h \
@@ -117,6 +118,7 @@ SOURCES += \
     cppprojectfile.cpp \
     cppqtstyleindenter.cpp \
     cpprefactoringchanges.cpp \
+    cppselectionchanger.cpp \
     cppsemanticinfo.cpp \
     cppsemanticinfoupdater.cpp \
     cppsourceprocessor.cpp \

src/plugins/cpptools/cpptools.qbs

@@ -66,6 +66,7 @@ QtcPlugin {
         "cppprojectfile.cpp", "cppprojectfile.h",
         "cppqtstyleindenter.cpp", "cppqtstyleindenter.h",
         "cpprefactoringchanges.cpp", "cpprefactoringchanges.h",
+        "cppselectionchanger.cpp", "cppselectionchanger.h",
         "cppsemanticinfo.cpp", "cppsemanticinfo.h",
         "cppsemanticinfoupdater.cpp", "cppsemanticinfoupdater.h",
         "cppsourceprocessor.cpp", "cppsourceprocessor.h",

src/plugins/texteditor/behaviorsettings.cpp

@@ -37,6 +37,7 @@ static const char constrainTooltips[] = "ConstrainTooltips";
 static const char camelCaseNavigationKey[] = "CamelCaseNavigation";
 static const char keyboardTooltips[] = "KeyboardTooltips";
 static const char groupPostfix[] = "BehaviorSettings";
+static const char smartSelectionChanging[] = "SmartSelectionChanging";
 
 namespace TextEditor {
 
@@ -46,7 +47,8 @@ BehaviorSettings::BehaviorSettings() :
     m_scrollWheelZooming(true),
     m_constrainHoverTooltips(false),
     m_camelCaseNavigation(true),
-    m_keyboardTooltips(false)
+    m_keyboardTooltips(false),
+    m_smartSelectionChanging(true)
 {
 }
 
@@ -69,6 +71,7 @@ void BehaviorSettings::toMap(const QString &prefix, QVariantMap *map) const
     map->insert(prefix + QLatin1String(constrainTooltips), m_constrainHoverTooltips);
     map->insert(prefix + QLatin1String(camelCaseNavigationKey), m_camelCaseNavigation);
     map->insert(prefix + QLatin1String(keyboardTooltips), m_keyboardTooltips);
+    map->insert(prefix + QLatin1String(smartSelectionChanging), m_smartSelectionChanging);
 }
 
 void BehaviorSettings::fromMap(const QString &prefix, const QVariantMap &map)
@@ -85,6 +88,9 @@ void BehaviorSettings::fromMap(const QString &prefix, const QVariantMap &map)
         map.value(prefix + QLatin1String(camelCaseNavigationKey), m_camelCaseNavigation).toBool();
     m_keyboardTooltips =
         map.value(prefix + QLatin1String(keyboardTooltips), m_keyboardTooltips).toBool();
+    m_smartSelectionChanging =
+        map.value(prefix + QLatin1String(smartSelectionChanging), m_smartSelectionChanging)
+           .toBool();
 }
 
 bool BehaviorSettings::equals(const BehaviorSettings &ds) const
@@ -95,6 +101,7 @@ bool BehaviorSettings::equals(const BehaviorSettings &ds) const
         && m_constrainHoverTooltips == ds.m_constrainHoverTooltips
         && m_camelCaseNavigation == ds.m_camelCaseNavigation
         && m_keyboardTooltips == ds.m_keyboardTooltips
+        && m_smartSelectionChanging == ds.m_smartSelectionChanging
         ;
 }
 

src/plugins/texteditor/behaviorsettings.h

@@ -59,6 +59,7 @@ public:
     bool m_constrainHoverTooltips;
     bool m_camelCaseNavigation;
     bool m_keyboardTooltips;
+    bool m_smartSelectionChanging;
 };
 
 inline bool operator==(const BehaviorSettings &t1, const BehaviorSettings &t2) { return t1.equals(t2); }

src/plugins/texteditor/behaviorsettingswidget.cpp

@@ -111,6 +111,8 @@ BehaviorSettingsWidget::BehaviorSettingsWidget(QWidget *parent)
             this, &BehaviorSettingsWidget::slotBehaviorSettingsChanged);
     connect(d->m_ui.keyboardTooltips, &QAbstractButton::clicked,
             this, &BehaviorSettingsWidget::slotBehaviorSettingsChanged);
+    connect(d->m_ui.smartSelectionChanging, &QAbstractButton::clicked,
+            this, &BehaviorSettingsWidget::slotBehaviorSettingsChanged);
 }
 
 BehaviorSettingsWidget::~BehaviorSettingsWidget()
@@ -198,6 +200,7 @@ void BehaviorSettingsWidget::setAssignedBehaviorSettings(const BehaviorSettings
     d->m_ui.constrainTooltipsBox->setCurrentIndex(behaviorSettings.m_constrainHoverTooltips ? 1 : 0);
     d->m_ui.camelCaseNavigation->setChecked(behaviorSettings.m_camelCaseNavigation);
     d->m_ui.keyboardTooltips->setChecked(behaviorSettings.m_keyboardTooltips);
+    d->m_ui.smartSelectionChanging->setChecked(behaviorSettings.m_smartSelectionChanging);
     updateConstrainTooltipsBoxTooltip();
 }
 
@@ -209,6 +212,7 @@ void BehaviorSettingsWidget::assignedBehaviorSettings(BehaviorSettings *behavior
     behaviorSettings->m_constrainHoverTooltips = (d->m_ui.constrainTooltipsBox->currentIndex() == 1);
     behaviorSettings->m_camelCaseNavigation = d->m_ui.camelCaseNavigation->isChecked();
     behaviorSettings->m_keyboardTooltips = d->m_ui.keyboardTooltips->isChecked();
+    behaviorSettings->m_smartSelectionChanging = d->m_ui.smartSelectionChanging->isChecked();
 }
 
 void BehaviorSettingsWidget::setAssignedExtraEncodingSettings(

src/plugins/texteditor/behaviorsettingswidget.ui

@@ -357,6 +357,16 @@ Specifies how backspace interacts with indentation.
           </property>
          </widget>
         </item>
+        <item>
+         <widget class="QCheckBox" name="smartSelectionChanging">
+          <property name="toolTip">
+           <string>Using Select Block Up / Down actions will now provide smarter selections.</string>
+          </property>
+          <property name="text">
+           <string>Enable smart selection changing</string>
+          </property>
+         </widget>
+        </item>
         <item>
          <widget class="QCheckBox" name="keyboardTooltips">
           <property name="toolTip">

src/plugins/texteditor/convenience.cpp

@@ -61,5 +61,13 @@ QString textAt(QTextCursor tc, int pos, int length)
     return tc.selectedText().replace(QChar::ParagraphSeparator, QLatin1Char('\n'));
 }
 
+QTextCursor flippedCursor(const QTextCursor &cursor)
+{
+    QTextCursor flipped = cursor;
+    flipped.clearSelection();
+    flipped.setPosition(cursor.anchor(), QTextCursor::KeepAnchor);
+    return flipped;
+}
+
 } // Util
 } // TextEditor

src/plugins/texteditor/convenience.h

@@ -44,6 +44,8 @@ TEXTEDITOR_EXPORT bool convertPosition(const QTextDocument *document,
 
 TEXTEDITOR_EXPORT QString textAt(QTextCursor tc, int pos, int length);
 
+TEXTEDITOR_EXPORT QTextCursor flippedCursor(const QTextCursor &cursor);
+
 } // Util
 } // TextEditor
 

src/plugins/texteditor/texteditor.cpp

@@ -1300,14 +1300,6 @@ void TextEditorWidget::gotoNextWordCamelCaseWithSelection()
     setTextCursor(c);
 }
 
-static QTextCursor flippedCursor(const QTextCursor &cursor)
-{
-    QTextCursor flipped = cursor;
-    flipped.clearSelection();
-    flipped.setPosition(cursor.anchor(), QTextCursor::KeepAnchor);
-    return flipped;
-}
-
 bool TextEditorWidget::selectBlockUp()
 {
     QTextCursor cursor = textCursor();
@@ -1321,7 +1313,7 @@ bool TextEditorWidget::selectBlockUp()
     if (!TextBlockUserData::findNextClosingParenthesis(&cursor, true))
         return false;
 
-    setTextCursor(flippedCursor(cursor));
+    setTextCursor(Convenience::flippedCursor(cursor));
     d->_q_matchParentheses();
     return true;
 }
@@ -1346,7 +1338,7 @@ bool TextEditorWidget::selectBlockDown()
     if ( cursor != d->m_selectBlockAnchor)
         TextBlockUserData::findNextClosingParenthesis(&cursor, true);
 
-    setTextCursor(flippedCursor(cursor));
+    setTextCursor(Convenience::flippedCursor(cursor));
     d->_q_matchParentheses();
     return true;
 }
@@ -5346,6 +5338,11 @@ const MarginSettings &TextEditorWidget::marginSettings() const
     return d->m_marginSettings;
 }
 
+const BehaviorSettings &TextEditorWidget::behaviorSettings() const
+{
+    return d->m_behaviorSettings;
+}
+
 void TextEditorWidgetPrivate::handleHomeKey(bool anchor)
 {
     QTextCursor cursor = q->textCursor();

src/plugins/texteditor/texteditor.h

@@ -294,6 +294,7 @@ public:
 
     const DisplaySettings &displaySettings() const;
     const MarginSettings &marginSettings() const;
+    const BehaviorSettings &behaviorSettings() const;
 
     void ensureCursorVisible();
 
@@ -389,8 +390,8 @@ public:
     void gotoNextWordCamelCase();
     void gotoNextWordCamelCaseWithSelection();
 
-    bool selectBlockUp();
-    bool selectBlockDown();
+    virtual bool selectBlockUp();
+    virtual bool selectBlockDown();
 
     void moveLineUp();
     void moveLineDown();
@@ -498,6 +499,7 @@ protected:
     void showDefaultContextMenu(QContextMenuEvent *e, Core::Id menuContextId);
     virtual void finalizeInitialization() {}
     virtual void finalizeInitializationAfterDuplication(TextEditorWidget *) {}
+    static QTextCursor flippedCursor(const QTextCursor &cursor);
 
 public:
     struct Link

src/plugins/texteditor/texteditoractionhandler.cpp

@@ -449,7 +449,7 @@ void TextEditorActionHandlerPrivate::createActions()
             G_EDIT_BLOCKS, advancedEditMenu);
     m_selectBlockDownAction = registerAction(SELECT_BLOCK_DOWN,
             [this] (TextEditorWidget *w) { w->selectBlockDown(); }, true, tr("Select Block Down"),
-            QKeySequence(),
+            QKeySequence(tr("Ctrl+Shift+Alt+U")),
             G_EDIT_BLOCKS, advancedEditMenu);
 
     // register GOTO Actions

tests/auto/cplusplus/cplusplus.pro

@@ -11,6 +11,7 @@ SUBDIRS = \
     typeprettyprinter \
     misc \
     c99 \
+    cppselectionchanger\
     cxx11 \
     checksymbols \
     lexer \

tests/auto/cplusplus/cplusplus.qbs

@@ -7,6 +7,7 @@ Project {
         "c99/c99.qbs",
         "checksymbols/checksymbols.qbs",
         "codeformatter/codeformatter.qbs",
+        "cppselectionchanger/cppselectionchanger.qbs",
         "cxx11/cxx11.qbs",
         "fileiterationorder/fileiterationorder.qbs",
         "findusages/findusages.qbs",

tests/auto/cplusplus/cppselectionchanger/cppselectionchanger.pro

+include(../shared/shared.pri)
+
+# Inject the source dir for referencing test data from shadow builds.
+DEFINES += SRCDIR=\\\"$$PWD\\\"
+
+SOURCES += tst_cppselectionchangertest.cpp
+
+DISTFILES += testCppFile.cpp \
+    cppselectionchanger.qbs

tests/auto/cplusplus/cppselectionchanger/cppselectionchanger.qbs

+import qbs
+import "../cplusplusautotest.qbs" as CPlusPlusAutotest
+
+CPlusPlusAutotest {
+    name: "CPlusPlus selection changer autotest"
+
+    Group {
+        name: "Source Files"
+        files: "tst_cppselectionchangertest.cpp"
+    }
+
+    Group {
+        name: "Data Files"
+        fileTags: ["data"]
+        files: [
+            "testCppFile.cpp",
+        ]
+    }
+
+    cpp.defines: base.concat(['SRCDIR="' + path + '"'])
+}

tests/auto/cplusplus/cppselectionchanger/testCppFile.cpp

+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include <string>
+#include <iostream>
+#include <map>
+#include <vector>
+
+struct TestClass {
+    int a;
+    char b;
+    char x;
+    char y;
+    char z;
+    std::string c;
+    double d;
+    std::map<int, int> e;
+};
+
+int add(int a, int b) {
+    return a + b;
+}
+
+template <class T>
+int subtract(T a, T b) {
+    return a - b;
+}
+
+namespace CustomNamespace {
+    extern int insideNamespace;
+    int foo() {
+        insideNamespace = 2;
+        return insideNamespace;
+    }
+}
+
+class CustomClass {
+    bool customClassMethod(const int &parameter) const volatile;
+};
+
+class SecondCustomClass {
+public:
+    SecondCustomClass(int argc, char *argv[]);
+    void secondCustomClassFunction();
+};
+
+bool CustomClass::customClassMethod(const int &parameter) const volatile {
+    int secondParameter = parameter;
+    ++secondParameter;
+    return secondParameter;
+}
+
+int main(int argc, char *argv[])
+{
+    std::map<int,TestClass> a;
+
+    SecondCustomClass secondCustomClass(argc, argv);
+    secondCustomClass.secondCustomClassFunction();
+
+    TestClass bla;
+    bla.a = 1;
+    bla.b = 65;
+    bla.c = "Hello";
+    bla.d = 3.14f;
+    bla.e[3] = 3;
+
+    a[3] = bla;
+
+    std::vector<int> v;
+    v.push_back(1);
+    v.push_back(2);
+
+    if (5 == 5) {
+        std::cout << "Hello" << 'c' << 54545 << u8"utf8string" << U"unicodeString";
+        for (int i = 0; i < 3; ++i) {
+            std::cout << i;
+        }
+
+        for (auto val :v) {
+            std::cout << val;
+        }
+    }
+
+    std::cout << "\n After exec";
+    std::cout << argc << argv;
+
+    std::cout << add(1, add(2, add(10, 20)));
+
+    auto res = std::find(v.begin(), v.end(), 1);
+    if (res != v.end())
+        std::cout << *res;
+    std::cout << static_cast<int>(3);
+
+    auto aLambda = [=, &a](int lambdaArgument) -> int {
+        return lambdaArgument + 1;
+    };
+    aLambda(1);
+
+    std::cout << R"(
+                 Raw literal
+                 )";
+}