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// Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#include "Bind.h"
#include "AST.h"
#include "TranslationUnit.h"
#include "Control.h"
#include "Names.h"
#include "Symbols.h"
#include "CoreTypes.h"
#include "Literals.h"
#include "Scope.h"
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#include "cppassert.h"

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#include <vector>
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#include <string>
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#include <memory>
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#include <sstream>
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using namespace CPlusPlus;

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const int Bind::kMaxDepth(100);

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Bind::Bind(TranslationUnit *unit)
    : ASTVisitor(unit),
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      _scope(0),
      _expression(0),
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      _name(0),
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      _declaratorId(0),
      _visibility(Symbol::Public),
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      _objcVisibility(Symbol::Public),
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      _methodKey(Function::NormalMethod),
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      _skipFunctionBodies(false),
      _depth(0)
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{
}

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bool Bind::skipFunctionBodies() const
{
    return _skipFunctionBodies;
}

void Bind::setSkipFunctionBodies(bool skipFunctionBodies)
{
    _skipFunctionBodies = skipFunctionBodies;
}

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unsigned Bind::location(DeclaratorAST *ast, unsigned defaultLocation) const
{
    if (! ast)
        return defaultLocation;

    else if (ast->core_declarator)
        return location(ast->core_declarator, defaultLocation);

    return ast->firstToken();
}

unsigned Bind::location(CoreDeclaratorAST *ast, unsigned defaultLocation) const
{
    if (! ast)
        return defaultLocation;

    else if (NestedDeclaratorAST *nested = ast->asNestedDeclarator())
        return location(nested->declarator, defaultLocation);

    else if (DeclaratorIdAST *id = ast->asDeclaratorId())
        return location(id->name, defaultLocation);

    return ast->firstToken();
}

unsigned Bind::location(NameAST *name, unsigned defaultLocation) const
{
    if (! name)
        return defaultLocation;

    else if (DestructorNameAST *dtor = name->asDestructorName())
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        return location(dtor->unqualified_name, defaultLocation);
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    else if (TemplateIdAST *templId = name->asTemplateId())
        return templId->identifier_token;

    else if (QualifiedNameAST *q = name->asQualifiedName()) {
        if (q->unqualified_name)
            return location(q->unqualified_name, defaultLocation);
    }

    return name->firstToken();
}

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void Bind::setDeclSpecifiers(Symbol *symbol, const FullySpecifiedType &declSpecifiers)
{
    if (! symbol)
        return;

    int storage = Symbol::NoStorage;

    if (declSpecifiers.isFriend())
        storage = Symbol::Friend;
    else if (declSpecifiers.isAuto())
        storage = Symbol::Auto;
    else if (declSpecifiers.isRegister())
        storage = Symbol::Register;
    else if (declSpecifiers.isStatic())
        storage = Symbol::Static;
    else if (declSpecifiers.isExtern())
        storage = Symbol::Extern;
    else if (declSpecifiers.isMutable())
        storage = Symbol::Mutable;
    else if (declSpecifiers.isTypedef())
        storage = Symbol::Typedef;

    symbol->setStorage(storage);

    if (Function *funTy = symbol->asFunction()) {
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        if (declSpecifiers.isVirtual())
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            funTy->setVirtual(true);
    }

    if (declSpecifiers.isDeprecated())
        symbol->setDeprecated(true);

    if (declSpecifiers.isUnavailable())
        symbol->setUnavailable(true);
}

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Scope *Bind::switchScope(Scope *scope)
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{
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    if (! scope)
        return _scope;

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    std::swap(_scope, scope);
    return scope;
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}

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int Bind::switchVisibility(int visibility)
{
    std::swap(_visibility, visibility);
    return visibility;
}

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int Bind::switchObjCVisibility(int visibility)
{
    std::swap(_objcVisibility, visibility);
    return visibility;
}

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int Bind::switchMethodKey(int methodKey)
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{
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    std::swap(_methodKey, methodKey);
    return methodKey;
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}

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void Bind::operator()(TranslationUnitAST *ast, Namespace *globalNamespace)
{
    Scope *previousScope = switchScope(globalNamespace);
    translationUnit(ast);
    (void) switchScope(previousScope);
}

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void Bind::operator()(DeclarationAST *ast, Scope *scope)
{
    Scope *previousScope = switchScope(scope);
    declaration(ast);
    (void) switchScope(previousScope);
}

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void Bind::operator()(StatementAST *ast, Scope *scope)
{
    Scope *previousScope = switchScope(scope);
    statement(ast);
    (void) switchScope(previousScope);
}

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FullySpecifiedType Bind::operator()(ExpressionAST *ast, Scope *scope)
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{
    Scope *previousScope = switchScope(scope);
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    FullySpecifiedType ty = expression(ast);
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    (void) switchScope(previousScope);
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    return ty;
}

FullySpecifiedType Bind::operator()(NewTypeIdAST *ast, Scope *scope)
{
    Scope *previousScope = switchScope(scope);
    FullySpecifiedType ty = newTypeId(ast);
    (void) switchScope(previousScope);
    return ty;
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}

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void Bind::statement(StatementAST *ast)
{
    accept(ast);
}

Bind::ExpressionTy Bind::expression(ExpressionAST *ast)
{
    ExpressionTy value = ExpressionTy();
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    std::swap(_expression, value);
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    accept(ast);
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    std::swap(_expression, value);
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    return value;
}

void Bind::declaration(DeclarationAST *ast)
{
    accept(ast);
}

const Name *Bind::name(NameAST *ast)
{
    const Name *value = 0;
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    std::swap(_name, value);
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    accept(ast);
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    std::swap(_name, value);
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    return value;
}

FullySpecifiedType Bind::specifier(SpecifierAST *ast, const FullySpecifiedType &init)
{
    FullySpecifiedType value = init;
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    std::swap(_type, value);
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    accept(ast);
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    std::swap(_type, value);
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    return value;
}

FullySpecifiedType Bind::ptrOperator(PtrOperatorAST *ast, const FullySpecifiedType &init)
{
    FullySpecifiedType value = init;
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    std::swap(_type, value);
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    accept(ast);
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    std::swap(_type, value);
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    return value;
}

FullySpecifiedType Bind::coreDeclarator(CoreDeclaratorAST *ast, const FullySpecifiedType &init)
{
    FullySpecifiedType value = init;
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    std::swap(_type, value);
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    accept(ast);
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    std::swap(_type, value);
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    return value;
}

FullySpecifiedType Bind::postfixDeclarator(PostfixDeclaratorAST *ast, const FullySpecifiedType &init)
{
    FullySpecifiedType value = init;
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    std::swap(_type, value);
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    accept(ast);
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    std::swap(_type, value);
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    return value;
}

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bool Bind::preVisit(AST *)
{
    ++_depth;
    if (_depth > kMaxDepth)
        return false;
    return true;
}

void Bind::postVisit(AST *)
{
    --_depth;
}

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// AST
bool Bind::visit(ObjCSelectorArgumentAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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const Name *Bind::objCSelectorArgument(ObjCSelectorArgumentAST *ast, bool *hasArg)
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{
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    if (! (ast && ast->name_token))
        return 0;
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    if (ast->colon_token)
        *hasArg = true;

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    return identifier(ast->name_token);
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}

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bool Bind::visit(GnuAttributeAST *ast)
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{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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void Bind::attribute(GnuAttributeAST *ast)
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{
    if (! ast)
        return;

    // unsigned identifier_token = ast->identifier_token;
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    if (const Identifier *id = identifier(ast->identifier_token)) {
        if (id == control()->deprecatedId())
            _type.setDeprecated(true);
        else if (id == control()->unavailableId())
            _type.setUnavailable(true);
    }

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    // unsigned lparen_token = ast->lparen_token;
    // unsigned tag_token = ast->tag_token;
    for (ExpressionListAST *it = ast->expression_list; it; it = it->next) {
        ExpressionTy value = this->expression(it->value);
    }
    // unsigned rparen_token = ast->rparen_token;
}

bool Bind::visit(DeclaratorAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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FullySpecifiedType Bind::declarator(DeclaratorAST *ast, const FullySpecifiedType &init, DeclaratorIdAST **declaratorId)
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{
    FullySpecifiedType type = init;

    if (! ast)
        return type;

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    std::swap(_declaratorId, declaratorId);
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    bool isAuto = false;
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    const bool cxx11Enabled = translationUnit()->languageFeatures().cxx11Enabled;
    if (cxx11Enabled)
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        isAuto = type.isAuto();

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    for (SpecifierListAST *it = ast->attribute_list; it; it = it->next) {
        type = this->specifier(it->value, type);
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        if (type.isAuto())
            isAuto = true;
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    }
    for (PtrOperatorListAST *it = ast->ptr_operator_list; it; it = it->next) {
        type = this->ptrOperator(it->value, type);
    }
    for (PostfixDeclaratorListAST *it = ast->postfix_declarator_list; it; it = it->next) {
        type = this->postfixDeclarator(it->value, type);
    }
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    type = this->coreDeclarator(ast->core_declarator, type);
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    for (SpecifierListAST *it = ast->post_attribute_list; it; it = it->next) {
        type = this->specifier(it->value, type);
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        if (type.isAuto())
            isAuto = true;
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    }
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    if (!type->isFunctionType()) {
        ExpressionTy initializer = this->expression(ast->initializer);
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        if (cxx11Enabled && isAuto) {
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            type = initializer;
            type.setAuto(true);
        }
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    }

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    std::swap(_declaratorId, declaratorId);
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    return type;
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}

bool Bind::visit(QtPropertyDeclarationItemAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

bool Bind::visit(QtInterfaceNameAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

void Bind::qtInterfaceName(QtInterfaceNameAST *ast)
{
    if (! ast)
        return;

    /*const Name *interface_name =*/ this->name(ast->interface_name);
    for (NameListAST *it = ast->constraint_list; it; it = it->next) {
        /*const Name *value =*/ this->name(it->value);
    }
}

bool Bind::visit(BaseSpecifierAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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void Bind::baseSpecifier(BaseSpecifierAST *ast, unsigned colon_token, Class *klass)
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{
    if (! ast)
        return;

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    unsigned sourceLocation = location(ast->name, ast->firstToken());
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    if (! sourceLocation)
        sourceLocation = std::max(colon_token, klass->sourceLocation());

    const Name *baseClassName = this->name(ast->name);
    BaseClass *baseClass = control()->newBaseClass(sourceLocation, baseClassName);
    if (ast->virtual_token)
        baseClass->setVirtual(true);
    if (ast->access_specifier_token) {
        const int visibility = visibilityForAccessSpecifier(tokenKind(ast->access_specifier_token));
        baseClass->setVisibility(visibility); // ### well, not exactly.
    }
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    klass->addBaseClass(baseClass);
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    ast->symbol = baseClass;
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}

bool Bind::visit(CtorInitializerAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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void Bind::ctorInitializer(CtorInitializerAST *ast, Function *fun)
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{
    if (! ast)
        return;

    // unsigned colon_token = ast->colon_token;
    for (MemInitializerListAST *it = ast->member_initializer_list; it; it = it->next) {
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        this->memInitializer(it->value, fun);
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    }
    // unsigned dot_dot_dot_token = ast->dot_dot_dot_token;
}

bool Bind::visit(EnumeratorAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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namespace {

bool isInteger(const StringLiteral *stringLiteral)
{
    const int size = stringLiteral->size();
    const char *chars = stringLiteral->chars();
    for (int i = 0; i < size; ++i) {
        if (!isdigit(chars[i]))
            return false;
    }
    return true;
}

bool stringLiteralToInt(const StringLiteral *stringLiteral, int *output)
{
    if (!output)
        return false;

    if (!isInteger(stringLiteral)) {
        *output = 0;
        return false;
    }

    std::stringstream ss(std::string(stringLiteral->chars(), stringLiteral->size()));
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    const bool ok = !(ss >> *output).fail();
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    if (!ok)
        *output = 0;

    return ok;
}

void calculateConstantValue(const Symbol *symbol, EnumeratorDeclaration *e, Control *control)
{
    if (symbol) {
        if (const Declaration *decl = symbol->asDeclaration()) {
            if (const EnumeratorDeclaration *previousEnumDecl = decl->asEnumeratorDeclarator()) {
                if (const StringLiteral *constantValue = previousEnumDecl->constantValue()) {
                    int constantValueAsInt = 0;
                    if (stringLiteralToInt(constantValue, &constantValueAsInt)) {
                        ++constantValueAsInt;
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                        const std::string buffer
                                = std::to_string(static_cast<long long>(constantValueAsInt));
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                        e->setConstantValue(control->stringLiteral(buffer.c_str(),
                                                                   unsigned(buffer.size())));
                    }
                }
            }
        }
    }
}

} // anonymous namespace

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void Bind::enumerator(EnumeratorAST *ast, Enum *symbol)
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{
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    (void) symbol;

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    if (! ast)
        return;

    // unsigned identifier_token = ast->identifier_token;
    // unsigned equal_token = ast->equal_token;
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    /*ExpressionTy expression =*/ this->expression(ast->expression);
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    if (ast->identifier_token) {
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        const Name *name = identifier(ast->identifier_token);
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        EnumeratorDeclaration *e = control()->newEnumeratorDeclaration(ast->identifier_token, name);
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        e->setType(control()->integerType(IntegerType::Int)); // ### introduce IntegerType::Enumerator
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        if (ExpressionAST *expr = ast->expression)
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            e->setConstantValue(asStringLiteral(expr->firstToken(), expr->lastToken()));
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        else if (!symbol->isEmpty())
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            calculateConstantValue(*(symbol->memberEnd()-1), e, control());
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        else
            e->setConstantValue(control()->stringLiteral("0", 1));
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        symbol->addMember(e);
    }
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}

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bool Bind::visit(DynamicExceptionSpecificationAST *ast)
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{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

FullySpecifiedType Bind::exceptionSpecification(ExceptionSpecificationAST *ast, const FullySpecifiedType &init)
{
    FullySpecifiedType type = init;

    if (! ast)
        return type;

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    if (DynamicExceptionSpecificationAST *dyn = ast->asDynamicExceptionSpecification()) {
        // unsigned throw_token = ast->throw_token;
        // unsigned lparen_token = ast->lparen_token;
        // unsigned dot_dot_dot_token = ast->dot_dot_dot_token;
        for (ExpressionListAST *it = dyn->type_id_list; it; it = it->next) {
            /*ExpressionTy value =*/ this->expression(it->value);
        }
    } else if (NoExceptSpecificationAST *no = ast->asNoExceptSpecification()) {
        /*ExpressionTy value =*/ this->expression(no->expression);
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    }
    // unsigned rparen_token = ast->rparen_token;
    return type;
}

bool Bind::visit(MemInitializerAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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void Bind::memInitializer(MemInitializerAST *ast, Function *fun)
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{
    if (! ast)
        return;

    /*const Name *name =*/ this->name(ast->name);
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    Scope *previousScope = switchScope(fun);
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    this->expression(ast->expression);
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    (void) switchScope(previousScope);
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}

bool Bind::visit(NestedNameSpecifierAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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const Name *Bind::nestedNameSpecifier(NestedNameSpecifierAST *ast)
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{
    if (! ast)
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        return 0;
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    const Name *class_or_namespace_name = this->name(ast->class_or_namespace_name);
    return class_or_namespace_name;
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}

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bool Bind::visit(ExpressionListParenAST *ast)
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{
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    // unsigned lparen_token = ast->lparen_token;
    for (ExpressionListAST *it = ast->expression_list; it; it = it->next) {
        /*ExpressionTy value =*/ this->expression(it->value);
    }
    // unsigned rparen_token = ast->rparen_token;

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    return false;
}

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void Bind::newPlacement(ExpressionListParenAST *ast)
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{
    if (! ast)
        return;

    // unsigned lparen_token = ast->lparen_token;
    for (ExpressionListAST *it = ast->expression_list; it; it = it->next) {
        ExpressionTy value = this->expression(it->value);
    }
    // unsigned rparen_token = ast->rparen_token;
}

bool Bind::visit(NewArrayDeclaratorAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

FullySpecifiedType Bind::newArrayDeclarator(NewArrayDeclaratorAST *ast, const FullySpecifiedType &init)
{
    FullySpecifiedType type = init;

    if (! ast)
        return type;

    // unsigned lbracket_token = ast->lbracket_token;
    ExpressionTy expression = this->expression(ast->expression);
    // unsigned rbracket_token = ast->rbracket_token;
    return type;
}

bool Bind::visit(NewTypeIdAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

FullySpecifiedType Bind::newTypeId(NewTypeIdAST *ast)
{
    FullySpecifiedType type;

    if (! ast)
        return type;


    for (SpecifierListAST *it = ast->type_specifier_list; it; it = it->next) {
        type = this->specifier(it->value, type);
    }
    for (PtrOperatorListAST *it = ast->ptr_operator_list; it; it = it->next) {
        type = this->ptrOperator(it->value, type);
    }
    for (NewArrayDeclaratorListAST *it = ast->new_array_declarator_list; it; it = it->next) {
        type = this->newArrayDeclarator(it->value, type);
    }
    return type;
}

bool Bind::visit(OperatorAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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OperatorNameId::Kind Bind::cppOperator(OperatorAST *ast)
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{
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    OperatorNameId::Kind kind = OperatorNameId::InvalidOp;

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    if (! ast)
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        return kind;
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    // unsigned op_token = ast->op_token;
    // unsigned open_token = ast->open_token;
    // unsigned close_token = ast->close_token;
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    switch (tokenKind(ast->op_token)) {
    case T_NEW:
        if (ast->open_token)
            kind = OperatorNameId::NewArrayOp;
        else
            kind = OperatorNameId::NewOp;
        break;

    case T_DELETE:
        if (ast->open_token)
            kind = OperatorNameId::DeleteArrayOp;
        else
            kind = OperatorNameId::DeleteOp;
        break;

    case T_PLUS:
        kind = OperatorNameId::PlusOp;
        break;

    case T_MINUS:
        kind = OperatorNameId::MinusOp;
        break;

    case T_STAR:
        kind = OperatorNameId::StarOp;
        break;

    case T_SLASH:
        kind = OperatorNameId::SlashOp;
        break;

    case T_PERCENT:
        kind = OperatorNameId::PercentOp;
        break;

    case T_CARET:
        kind = OperatorNameId::CaretOp;
        break;

    case T_AMPER:
        kind = OperatorNameId::AmpOp;
        break;

    case T_PIPE:
        kind = OperatorNameId::PipeOp;
        break;

    case T_TILDE:
        kind = OperatorNameId::TildeOp;
        break;

    case T_EXCLAIM:
        kind = OperatorNameId::ExclaimOp;
        break;

    case T_EQUAL:
        kind = OperatorNameId::EqualOp;
        break;

    case T_LESS:
        kind = OperatorNameId::LessOp;
        break;

    case T_GREATER:
        kind = OperatorNameId::GreaterOp;
        break;

    case T_PLUS_EQUAL:
        kind = OperatorNameId::PlusEqualOp;
        break;

    case T_MINUS_EQUAL:
        kind = OperatorNameId::MinusEqualOp;
        break;

    case T_STAR_EQUAL:
        kind = OperatorNameId::StarEqualOp;
        break;

    case T_SLASH_EQUAL:
        kind = OperatorNameId::SlashEqualOp;
        break;

    case T_PERCENT_EQUAL:
        kind = OperatorNameId::PercentEqualOp;
        break;

    case T_CARET_EQUAL:
        kind = OperatorNameId::CaretEqualOp;
        break;

    case T_AMPER_EQUAL:
        kind = OperatorNameId::AmpEqualOp;
        break;

    case T_PIPE_EQUAL:
        kind = OperatorNameId::PipeEqualOp;
        break;

    case T_LESS_LESS:
        kind = OperatorNameId::LessLessOp;
        break;

    case T_GREATER_GREATER:
        kind = OperatorNameId::GreaterGreaterOp;
        break;

    case T_LESS_LESS_EQUAL:
        kind = OperatorNameId::LessLessEqualOp;
        break;

    case T_GREATER_GREATER_EQUAL:
        kind = OperatorNameId::GreaterGreaterEqualOp;
        break;

    case T_EQUAL_EQUAL:
        kind = OperatorNameId::EqualEqualOp;
        break;

    case T_EXCLAIM_EQUAL:
        kind = OperatorNameId::ExclaimEqualOp;
        break;

    case T_LESS_EQUAL:
        kind = OperatorNameId::LessEqualOp;
        break;

    case T_GREATER_EQUAL:
        kind = OperatorNameId::GreaterEqualOp;
        break;

    case T_AMPER_AMPER:
        kind = OperatorNameId::AmpAmpOp;
        break;

    case T_PIPE_PIPE:
        kind = OperatorNameId::PipePipeOp;
        break;

    case T_PLUS_PLUS:
        kind = OperatorNameId::PlusPlusOp;
        break;

    case T_MINUS_MINUS:
        kind = OperatorNameId::MinusMinusOp;
        break;

    case T_COMMA:
        kind = OperatorNameId::CommaOp;
        break;

    case T_ARROW_STAR:
        kind = OperatorNameId::ArrowStarOp;
        break;

    case T_ARROW:
        kind = OperatorNameId::ArrowOp;
        break;

    case T_LPAREN:
        kind = OperatorNameId::FunctionCallOp;
        break;

    case T_LBRACKET:
        kind = OperatorNameId::ArrayAccessOp;
        break;

    default:
        kind = OperatorNameId::InvalidOp;
    } // switch

    return kind;
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}

bool Bind::visit(ParameterDeclarationClauseAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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void Bind::parameterDeclarationClause(ParameterDeclarationClauseAST *ast, unsigned lparen_token, Function *fun)
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{
    if (! ast)
        return;

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    if (! fun) {
        translationUnit()->warning(lparen_token, "undefined function");
        return;
    }

    Scope *previousScope = switchScope(fun);

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    for (ParameterDeclarationListAST *it = ast->parameter_declaration_list; it; it = it->next) {
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        this->declaration(it->value);
    }
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    if (ast->dot_dot_dot_token)
        fun->setVariadic(true);

    (void) switchScope(previousScope);
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}

bool Bind::visit(TranslationUnitAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

void Bind::translationUnit(TranslationUnitAST *ast)
{
    if (! ast)
        return;

    for (DeclarationListAST *it = ast->declaration_list; it; it = it->next) {
        this->declaration(it->value);
    }
}

bool Bind::visit(ObjCProtocolRefsAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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void Bind::objCProtocolRefs(ObjCProtocolRefsAST *ast, Symbol *objcClassOrProtocol)
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{
    if (! ast)
        return;

    for (NameListAST *it = ast->identifier_list; it; it = it->next) {
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        const Name *protocolName = this->name(it->value);
        ObjCBaseProtocol *baseProtocol = control()->newObjCBaseProtocol(it->value->firstToken(), protocolName);
        if (ObjCClass *klass = objcClassOrProtocol->asObjCClass())
            klass->addProtocol(baseProtocol);
        else if (ObjCProtocol *proto = objcClassOrProtocol->asObjCProtocol())
            proto->addProtocol(baseProtocol);
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    }
}

bool Bind::visit(ObjCMessageArgumentAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

void Bind::objCMessageArgument(ObjCMessageArgumentAST *ast)
{
    if (! ast)
        return;

    ExpressionTy parameter_value_expression = this->expression(ast->parameter_value_expression);
}

bool Bind::visit(ObjCTypeNameAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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FullySpecifiedType Bind::objCTypeName(ObjCTypeNameAST *ast)
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{
    if (! ast)
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        return FullySpecifiedType();
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    // unsigned type_qualifier_token = ast->type_qualifier_token;
    ExpressionTy type_id = this->expression(ast->type_id);
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    return type_id;
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}

bool Bind::visit(ObjCInstanceVariablesDeclarationAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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void Bind::objCInstanceVariablesDeclaration(ObjCInstanceVariablesDeclarationAST *ast, ObjCClass *klass)
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{
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    (void) klass;

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    if (! ast)
        return;

    // unsigned lbrace_token = ast->lbrace_token;
    for (DeclarationListAST *it = ast->instance_variable_list; it; it = it->next) {
        this->declaration(it->value);
    }
    // unsigned rbrace_token = ast->rbrace_token;
}

bool Bind::visit(ObjCPropertyAttributeAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

void Bind::objCPropertyAttribute(ObjCPropertyAttributeAST *ast)
{
    if (! ast)
        return;

    // unsigned attribute_identifier_token = ast->attribute_identifier_token;
    // unsigned equals_token = ast->equals_token;
    /*const Name *method_selector =*/ this->name(ast->method_selector);
}

bool Bind::visit(ObjCMessageArgumentDeclarationAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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void Bind::objCMessageArgumentDeclaration(ObjCMessageArgumentDeclarationAST *ast, ObjCMethod *method)
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{
    if (! ast)
        return;

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    FullySpecifiedType type = this->objCTypeName(ast->type_name);

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    for (SpecifierListAST *it = ast->attribute_list; it; it = it->next) {
        type = this->specifier(it->value, type);
    }
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    const Name *param_name = this->name(ast->param_name);
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    Argument *arg = control()->newArgument(location(ast->param_name, ast->firstToken()), param_name);
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    arg->setType(type);
    ast->argument = arg;
    method->addMember(arg);
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}

bool Bind::visit(ObjCMethodPrototypeAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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ObjCMethod *Bind::objCMethodPrototype(ObjCMethodPrototypeAST *ast)
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{
    if (! ast)
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        return 0;
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    // unsigned method_type_token = ast->method_type_token;
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    FullySpecifiedType returnType = this->objCTypeName(ast->type_name);
    const Name *selector = this->name(ast->selector);

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    const unsigned sourceLocation = location(ast->selector, ast->firstToken());
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    ObjCMethod *method = control()->newObjCMethod(sourceLocation, selector);
    // ### set the offsets
    method->setReturnType(returnType);
    if (isObjCClassMethod(tokenKind(ast->method_type_token)))
        method->setStorage(Symbol::Static);
    method->setVisibility(_objcVisibility);
    ast->symbol = method;

    Scope *previousScope = switchScope(method);
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    for (ObjCMessageArgumentDeclarationListAST *it = ast->argument_list; it; it = it->next) {
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        this->objCMessageArgumentDeclaration(it->value, method);
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    }
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    (void) switchScope(previousScope);

    if (ast->dot_dot_dot_token)
        method->setVariadic(true);

    FullySpecifiedType specifiers;
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    for (SpecifierListAST *it = ast->attribute_list; it; it = it->next) {
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        specifiers = this->specifier(it->value, specifiers);
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    }
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    //setDeclSpecifiers(method, specifiers);
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    return method;
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}

bool Bind::visit(ObjCSynthesizedPropertyAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

void Bind::objCSynthesizedProperty(ObjCSynthesizedPropertyAST *ast)
{
    if (! ast)
        return;

    // unsigned property_identifier_token = ast->property_identifier_token;
    // unsigned equals_token = ast->equals_token;
    // unsigned alias_identifier_token = ast->alias_identifier_token;
}

bool Bind::visit(LambdaIntroducerAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

void Bind::lambdaIntroducer(LambdaIntroducerAST *ast)
{
    if (! ast)
        return;

    // unsigned lbracket_token = ast->lbracket_token;
    this->lambdaCapture(ast->lambda_capture);
    // unsigned rbracket_token = ast->rbracket_token;
}

bool Bind::visit(LambdaCaptureAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

void Bind::lambdaCapture(LambdaCaptureAST *ast)
{
    if (! ast)
        return;

    // unsigned default_capture_token = ast->default_capture_token;
    for (CaptureListAST *it = ast->capture_list; it; it = it->next) {
        this->capture(it->value);
    }
}

bool Bind::visit(CaptureAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

void Bind::capture(CaptureAST *ast)
{
    if (! ast)
        return;

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    name(ast->identifier);
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}

bool Bind::visit(LambdaDeclaratorAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

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Function *Bind::lambdaDeclarator(LambdaDeclaratorAST *ast)
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{
    if (! ast)
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        return 0;
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    Function *fun = control()->newFunction(0, 0);
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    fun->setStartOffset(tokenAt(ast->firstToken()).utf16charsBegin());
    fun->setEndOffset(tokenAt(ast->lastToken() - 1).utf16charsEnd());
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    FullySpecifiedType type;
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    if (ast->trailing_return_type)
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        type = this->trailingReturnType(ast->trailing_return_type, type);
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    ast->symbol = fun;
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    // unsigned lparen_token = ast->lparen_token;
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    this->parameterDeclarationClause(ast->parameter_declaration_clause, ast->lparen_token, fun);
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    // unsigned rparen_token = ast->rparen_token;
    for (SpecifierListAST *it = ast->attributes; it; it = it->next) {
        type = this->specifier(it->value, type);
    }
    // unsigned mutable_token = ast->mutable_token;
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    type = this->exceptionSpecification(ast->exception_specification, type);

    if (!type.isValid())
        type.setType(control()->voidType());
    fun->setReturnType(type);
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    return fun;
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}

bool Bind::visit(TrailingReturnTypeAST *ast)
{
    (void) ast;
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    CPP_CHECK(!"unreachable");
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    return false;
}

FullySpecifiedType Bind::trailingReturnType(TrailingReturnTypeAST *ast, const FullySpecifiedType &init)
{
    FullySpecifiedType type = init;

    if (! ast)
        return type;

    // unsigned arrow_token = ast->arrow_token;
    for (SpecifierListAST *it = ast->attributes; it; it = it->next) {
        type = this->specifier(it->value, type);
    }
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    for (SpecifierListAST *it = ast->type_specifier_list; it; it = it->next) {
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        type = this->specifier(it->value, type);
    }
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    DeclaratorIdAST *declaratorId = 0;
    type = this->declarator(ast->declarator, type, &declaratorId);
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    return type;
}

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const StringLiteral *Bind::asStringLiteral(unsigned firstToken, unsigned lastToken)
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{
    std::string buffer;
    for (unsigned index = firstToken; index != lastToken; ++index) {
        const Token &tk = tokenAt(index);
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        if (index != firstToken && (tk.whitespace() || tk.newline()))
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            buffer += ' ';
        buffer += tk.spell();
    }
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    return control()->stringLiteral(buffer.c_str(), unsigned(buffer.size()));
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}
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// StatementAST
bool Bind::visit(QtMemberDeclarationAST *ast)
{
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    const Name *name = 0;

    if (tokenKind(ast->q_token) == T_Q_D)
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        name = control()->identifier("d");
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    else
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        name = control()->identifier("q");
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    FullySpecifiedType declTy = this->expression(ast->type_id);

    if (tokenKind(ast->q_token) == T_Q_D) {
        if (NamedType *namedTy = declTy->asNamedType()) {
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            if (const Identifier *nameId = namedTy->name()->asNameId()) {
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                std::string privateClass;
                privateClass += nameId->identifier()->chars();
                privateClass += "Private";

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                const Name *privName = control()->identifier(privateClass.c_str(), unsigned(privateClass.size()));
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                declTy.setType(control()->namedType(privName));
            }
        }
    }

    Declaration *symbol = control()->newDeclaration(/*generated*/ 0, name);
    symbol->setType(control()->pointerType(declTy));

    _scope->addMember(symbol);
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    return false;
}

bool Bind::visit(CaseStatementAST *ast)
{
    ExpressionTy expression = this->expression(ast->expression);
    this->statement(ast->statement);
    return false;
}

bool Bind::visit(CompoundStatementAST *ast)
{
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    Block *block = control()->newBlock(ast->firstToken());
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    unsigned startScopeToken = ast->lbrace_token ? ast->lbrace_token : ast->firstToken();
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    block->setStartOffset(tokenAt(startScopeToken).utf16charsEnd());
    block->setEndOffset(tokenAt(ast->lastToken() - 1).utf16charsEnd());
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    ast->symbol = block;
    _scope->addMember(block);
    Scope *previousScope = switchScope(block);
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    for (StatementListAST *it = ast->statement_list; it; it = it->next) {
        this->statement(it->value);
    }
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    (void) switchScope(previousScope);
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