C++ StatementNode类代码示例

UnlinkedFunctionExecutable* CodeCache::getFunctionExecutableFromGlobalCode(JSGlobalData& globalData, const Identifier& name, const SourceCode& source, ParserError& error)
{
    SourceCodeKey key = SourceCodeKey(source, name.string(), SourceCodeKey::FunctionType, JSParseNormal);
    CodeCacheMap::AddResult addResult = m_sourceCode.add(key, SourceCodeValue());
    if (!addResult.isNewEntry)
        return jsCast<UnlinkedFunctionExecutable*>(addResult.iterator->value.cell.get());

    RefPtr<ProgramNode> program = parse<ProgramNode>(&globalData, source, 0, Identifier(), JSParseNormal, JSParseProgramCode, error);
    if (!program) {
        ASSERT(error.m_type != ParserError::ErrorNone);
        m_sourceCode.remove(addResult.iterator);
        return 0;
    }

    // This function assumes an input string that would result in a single anonymous function expression.
    StatementNode* exprStatement = program->singleStatement();
    ASSERT(exprStatement);
    ASSERT(exprStatement->isExprStatement());
    ExpressionNode* funcExpr = static_cast<ExprStatementNode*>(exprStatement)->expr();
    ASSERT(funcExpr);
    RELEASE_ASSERT(funcExpr->isFuncExprNode());
    FunctionBodyNode* body = static_cast<FuncExprNode*>(funcExpr)->body();
    ASSERT(body);
    ASSERT(body->ident().isNull());

    UnlinkedFunctionExecutable* functionExecutable = UnlinkedFunctionExecutable::create(&globalData, source, body);
    functionExecutable->m_nameValue.set(globalData, functionExecutable, jsString(&globalData, name.string()));

    addResult.iterator->value = SourceCodeValue(globalData, functionExecutable, m_sourceCode.age());
    return functionExecutable;
}

 // (If <expression> <statement> (Else <statement>)?
 void visit( IfStatementNode aNode ) {
   std::cout << " (If ";
   aNode.getCond()->accept( (*this) );
   aNode.getTrueBranch()->accept( (*this) );
   StatementNode* falseBranch = aNode.getFalseBranch();
   if ( falseBranch != NULL ) {
     std::cout << " Else ";
     falseBranch->accept( (*this) );
   }
   std::cout << " )";
 }

void StatementMientrasNode::ValidateSemantic()
{
    if(Expression->ValidateSemantic()->Name!="Booleano")
    {
        throw SemanticException("Se esperaba Booleano ,Fila:"+to_string(Expression->Row)+",Columna:"+to_string(Expression->Column));
    }
    list<StatementNode*>::const_iterator iterator;
    StatementNode* temp;
    for (iterator = Statements->begin(); iterator != Statements->end(); ++iterator) {
        temp=*iterator;
        temp->ValidateSemantic();
    }
}

FunctionExecutable* FunctionExecutable::fromGlobalCode(const Identifier& functionName, ExecState* exec, Debugger* debugger, const SourceCode& source, JSObject** exception)
{
    JSGlobalObject* lexicalGlobalObject = exec->lexicalGlobalObject();
    RefPtr<ProgramNode> program = exec->globalData().parser->parse<ProgramNode>(lexicalGlobalObject, debugger, exec, source, 0, JSParseNormal, exception);
    if (!program) {
        ASSERT(*exception);
        return 0;
    }

    // Uses of this function that would not result in a single function expression are invalid.
    StatementNode* exprStatement = program->singleStatement();
    ASSERT(exprStatement);
    ASSERT(exprStatement->isExprStatement());
    ExpressionNode* funcExpr = static_cast<ExprStatementNode*>(exprStatement)->expr();
    ASSERT(funcExpr);
    ASSERT(funcExpr->isFuncExprNode());
    FunctionBodyNode* body = static_cast<FuncExprNode*>(funcExpr)->body();
    ASSERT(body);

    return FunctionExecutable::create(exec->globalData(), functionName, body->source(), body->usesArguments(), body->parameters(), body->isStrictMode(), body->lineNo(), body->lastLine());
}

void StatementParaNode::ValidateSemantic()
{
    if(Variable->ValidateSemantic()->Name!="Entero")
    {
        throw SemanticException("Se esperaba Entero ,Fila:"+to_string(Variable->Row)+",Columna:"+to_string(Variable->Column));
    }
    if(FirstExpression->ValidateSemantic()->Name!="Entero")
    {
        throw SemanticException("Se esperaba Entero ,Fila:"+to_string(FirstExpression->Row)+",Columna:"+to_string(FirstExpression->Column));
    }
    if(SecondExpression->ValidateSemantic()->Name!="Entero")
    {
        throw SemanticException("Se esperaba Entero ,Fila:"+to_string(SecondExpression->Row)+",Columna:"+to_string(SecondExpression->Column));
    }

    list<StatementNode*>::const_iterator iterator;
    StatementNode* temp;
    for (iterator = Statements->begin(); iterator != Statements->end(); ++iterator) {
        temp=*iterator;
        temp->ValidateSemantic();
    }
}

// FIXME: There's no need to add the function's name to the key here. It's already in the source code.
UnlinkedFunctionExecutable* CodeCache::getFunctionExecutableFromGlobalCode(VM& vm, const Identifier& name, const SourceCode& source, ParserError& error)
{
    bool isArrowFunctionContext = false;
    SourceCodeKey key(
        source, name.string(), SourceCodeType::FunctionType,
        JSParserBuiltinMode::NotBuiltin,
        JSParserStrictMode::NotStrict,
        JSParserCommentMode::Classic,
        DerivedContextType::None,
        EvalContextType::None,
        isArrowFunctionContext);
    SourceCodeValue* cache = m_sourceCode.findCacheAndUpdateAge(key);
    if (cache) {
        UnlinkedFunctionExecutable* executable = jsCast<UnlinkedFunctionExecutable*>(cache->cell.get());
        source.provider()->setSourceURLDirective(executable->sourceURLDirective());
        source.provider()->setSourceMappingURLDirective(executable->sourceMappingURLDirective());
        return executable;
    }

    JSTextPosition positionBeforeLastNewline;
    std::unique_ptr<ProgramNode> program = parse<ProgramNode>(
        &vm, source, Identifier(), JSParserBuiltinMode::NotBuiltin,
        JSParserStrictMode::NotStrict, JSParserCommentMode::Classic, SourceParseMode::ProgramMode, SuperBinding::NotNeeded,
        error, &positionBeforeLastNewline);
    if (!program) {
        RELEASE_ASSERT(error.isValid());
        return nullptr;
    }

    // This function assumes an input string that would result in a single function declaration.
    StatementNode* statement = program->singleStatement();
    ASSERT(statement);
    ASSERT(statement->isBlock());
    if (!statement || !statement->isBlock())
        return nullptr;

    StatementNode* funcDecl = static_cast<BlockNode*>(statement)->singleStatement();
    ASSERT(funcDecl);
    ASSERT(funcDecl->isFuncDeclNode());
    if (!funcDecl || !funcDecl->isFuncDeclNode())
        return nullptr;

    FunctionMetadataNode* metadata = static_cast<FuncDeclNode*>(funcDecl)->metadata();
    ASSERT(metadata);
    if (!metadata)
        return nullptr;
    
    metadata->overrideName(name);
    metadata->setEndPosition(positionBeforeLastNewline);
    // The Function constructor only has access to global variables, so no variables will be under TDZ.
    VariableEnvironment emptyTDZVariables;
    UnlinkedFunctionExecutable* functionExecutable = UnlinkedFunctionExecutable::create(&vm, source, metadata, UnlinkedNormalFunction, ConstructAbility::CanConstruct, JSParserCommentMode::Classic, emptyTDZVariables, DerivedContextType::None);

    functionExecutable->setSourceURLDirective(source.provider()->sourceURL());
    functionExecutable->setSourceMappingURLDirective(source.provider()->sourceMappingURL());

    m_sourceCode.addCache(key, SourceCodeValue(vm, functionExecutable, m_sourceCode.age()));
    return functionExecutable;
}

PassRefPtr<FunctionExecutable> FunctionExecutable::fromGlobalCode(const Identifier& functionName, ExecState* exec, Debugger* debugger, const SourceCode& source, int* errLine, UString* errMsg)
{
    RefPtr<ProgramNode> program = exec->globalData().parser->parse<ProgramNode>(&exec->globalData(), debugger, exec, source, errLine, errMsg);
    if (!program)
        return 0;

    StatementNode* exprStatement = program->singleStatement();
    ASSERT(exprStatement);
    ASSERT(exprStatement->isExprStatement());
    if (!exprStatement || !exprStatement->isExprStatement())
        return 0;

    ExpressionNode* funcExpr = static_cast<ExprStatementNode*>(exprStatement)->expr();
    ASSERT(funcExpr);
    ASSERT(funcExpr->isFuncExprNode());
    if (!funcExpr || !funcExpr->isFuncExprNode())
        return 0;

    FunctionBodyNode* body = static_cast<FuncExprNode*>(funcExpr)->body();
    ASSERT(body);
    return FunctionExecutable::create(&exec->globalData(), functionName, body->source(), body->usesArguments(), body->parameters(), body->lineNo(), body->lastLine());
}

// FIXME: There's no need to add the function's name to the key here. It's already in the source code.
UnlinkedFunctionExecutable* CodeCache::getFunctionExecutableFromGlobalCode(VM& vm, const Identifier& name, const SourceCode& source, ParserError& error)
{
    SourceCodeKey key = SourceCodeKey(
        source, name.string(), SourceCodeKey::FunctionType, 
        JSParserBuiltinMode::NotBuiltin, 
        JSParserStrictMode::NotStrict);
    SourceCodeValue* cache = m_sourceCode.findCacheAndUpdateAge(key);
    if (cache)
        return jsCast<UnlinkedFunctionExecutable*>(cache->cell.get());

    JSTextPosition positionBeforeLastNewline;
    std::unique_ptr<ProgramNode> program = parse<ProgramNode>(
        &vm, source, Identifier(), JSParserBuiltinMode::NotBuiltin, 
        JSParserStrictMode::NotStrict, JSParserCodeType::Program, 
        error, &positionBeforeLastNewline);
    if (!program) {
        RELEASE_ASSERT(error.isValid());
        return nullptr;
    }

    // This function assumes an input string that would result in a single function declaration.
    StatementNode* statement = program->singleStatement();
    ASSERT(statement);
    ASSERT(statement->isBlock());
    if (!statement || !statement->isBlock())
        return nullptr;

    StatementNode* funcDecl = static_cast<BlockNode*>(statement)->singleStatement();
    ASSERT(funcDecl);
    ASSERT(funcDecl->isFuncDeclNode());
    if (!funcDecl || !funcDecl->isFuncDeclNode())
        return nullptr;

    FunctionBodyNode* body = static_cast<FuncDeclNode*>(funcDecl)->body();
    ASSERT(body);
    if (!body)
        return nullptr;
    
    body->setEndPosition(positionBeforeLastNewline);
    // The Function constructor only has access to global variables, so no variables will be under TDZ.
    VariableEnvironment emptyTDZVariables;
    UnlinkedFunctionExecutable* functionExecutable = UnlinkedFunctionExecutable::create(&vm, source, body, UnlinkedNormalFunction, ConstructAbility::CanConstruct, emptyTDZVariables);
    functionExecutable->m_nameValue.set(vm, functionExecutable, jsString(&vm, name.string()));

    m_sourceCode.addCache(key, SourceCodeValue(vm, functionExecutable, m_sourceCode.age()));
    return functionExecutable;
}

BuiltinExecutables::BuiltinExecutables(VM& vm)
    : m_vm(vm)
#define INITIALIZE_BUILTIN_SOURCE_MEMBERS(name, functionName, length) , m_##name##Source(makeSource(StringImpl::createFromLiteral(s_##name, length)))
    JSC_FOREACH_BUILTIN_CODE(INITIALIZE_BUILTIN_SOURCE_MEMBERS)
#undef EXPOSE_BUILTIN_STRINGS
{
}

UnlinkedFunctionExecutable* BuiltinExecutables::createDefaultConstructor(ConstructorKind constructorKind, const Identifier& name)
{
    static NeverDestroyed<const String> baseConstructorCode(ASCIILiteral("(function () { })"));
    static NeverDestroyed<const String> derivedConstructorCode(ASCIILiteral("(function () { super(...arguments); })"));

    switch (constructorKind) {
    case ConstructorKind::None:
        break;
    case ConstructorKind::Base:
        return createExecutable(m_vm, makeSource(baseConstructorCode), name, constructorKind, ConstructAbility::CanConstruct);
    case ConstructorKind::Extends:
        return createExecutable(m_vm, makeSource(derivedConstructorCode), name, constructorKind, ConstructAbility::CanConstruct);
    }
    ASSERT_NOT_REACHED();
    return nullptr;
}

UnlinkedFunctionExecutable* BuiltinExecutables::createBuiltinExecutable(const SourceCode& code, const Identifier& name, ConstructAbility constructAbility)
{
    return createExecutable(m_vm, code, name, ConstructorKind::None, constructAbility);
}

UnlinkedFunctionExecutable* createBuiltinExecutable(VM& vm, const SourceCode& code, const Identifier& name, ConstructAbility constructAbility)
{
    return BuiltinExecutables::createExecutable(vm, code, name, ConstructorKind::None, constructAbility);
}

UnlinkedFunctionExecutable* BuiltinExecutables::createExecutable(VM& vm, const SourceCode& source, const Identifier& name, ConstructorKind constructorKind, ConstructAbility constructAbility)
{
    JSTextPosition positionBeforeLastNewline;
    ParserError error;
    bool isParsingDefaultConstructor = constructorKind != ConstructorKind::None;
    JSParserBuiltinMode builtinMode = isParsingDefaultConstructor ? JSParserBuiltinMode::NotBuiltin : JSParserBuiltinMode::Builtin;
    UnlinkedFunctionKind kind = isParsingDefaultConstructor ? UnlinkedNormalFunction : UnlinkedBuiltinFunction;
    RefPtr<SourceProvider> sourceOverride = isParsingDefaultConstructor ? source.provider() : nullptr;
    std::unique_ptr<ProgramNode> program = parse<ProgramNode>(
        &vm, source, Identifier(), builtinMode,
        JSParserStrictMode::NotStrict, SourceParseMode::ProgramMode, SuperBinding::NotNeeded, error,
        &positionBeforeLastNewline, constructorKind);

    if (!program) {
        dataLog("Fatal error compiling builtin function '", name.string(), "': ", error.message());
        CRASH();
    }

    StatementNode* exprStatement = program->singleStatement();
    RELEASE_ASSERT(exprStatement);
    RELEASE_ASSERT(exprStatement->isExprStatement());
    ExpressionNode* funcExpr = static_cast<ExprStatementNode*>(exprStatement)->expr();
    RELEASE_ASSERT(funcExpr);
    RELEASE_ASSERT(funcExpr->isFuncExprNode());
    FunctionMetadataNode* metadata = static_cast<FuncExprNode*>(funcExpr)->metadata();
    RELEASE_ASSERT(!program->hasCapturedVariables());
    
    metadata->setEndPosition(positionBeforeLastNewline);
    RELEASE_ASSERT(metadata);
    RELEASE_ASSERT(metadata->ident().isNull());
    
    // This function assumes an input string that would result in a single anonymous function expression.
    metadata->setEndPosition(positionBeforeLastNewline);
    RELEASE_ASSERT(metadata);
    metadata->overrideName(name);
    VariableEnvironment dummyTDZVariables;
    UnlinkedFunctionExecutable* functionExecutable = UnlinkedFunctionExecutable::create(&vm, source, metadata, kind, constructAbility, dummyTDZVariables, DerivedContextType::None, WTFMove(sourceOverride));
    return functionExecutable;
}