/// <summary>
/// Initializes a new instance of the TypeofExpression class.
/// </summary>
/// <param name="proxy">Proxy object for the expression.</param>
/// <param name="type">The type literal to get the type of.</param>
internal TypeofExpression(CodeUnitProxy proxy, LiteralExpression type)
: base(proxy, ExpressionType.Typeof)
{
Param.AssertNotNull(proxy, "proxy");
Param.AssertNotNull(type, "type");
this.type.Value = CodeParser.ExtractTypeTokenFromLiteralExpression(type);
}
/// <summary>
/// Initializes a new instance of the LabelStatement class.
/// </summary>
/// <param name="proxy">Proxy object for the statement.</param>
/// <param name="identifier">The label identifier.</param>
internal LabelStatement(CodeUnitProxy proxy, LiteralExpression identifier)
: base(proxy, StatementType.Label)
{
Param.AssertNotNull(proxy, "proxy");
Param.AssertNotNull(identifier, "identifier");
this.identifier.Value = identifier;
}
/// <summary>
/// Initializes a new instance of the CastExpression class.
/// </summary>
/// <param name="proxy">Proxy object for the expression.</param>
/// <param name="type">The cast type.</param>
/// <param name="castedExpression">The expression being casted.</param>
internal CastExpression(CodeUnitProxy proxy, LiteralExpression type, Expression castedExpression)
: base(proxy, ExpressionType.Cast)
{
Param.AssertNotNull(proxy, "proxy");
Param.AssertNotNull(type, "type");
Param.AssertNotNull(castedExpression, "castedExpression");
this.type.Value = CodeParser.ExtractTypeTokenFromLiteralExpression(type);
this.castedExpression.Value = castedExpression;
}
/// <summary>
/// Initializes a new instance of the VariableDeclaratorExpression class.
/// </summary>
/// <param name="proxy">Proxy object for the expression.</param>
/// <param name="identifier">The identifier name of the variable.</param>
/// <param name="initializer">The initialization expression for the variable.</param>
internal VariableDeclaratorExpression(CodeUnitProxy proxy, LiteralExpression identifier, Expression initializer)
: base(proxy, ExpressionType.VariableDeclarator)
{
Param.AssertNotNull(proxy, "proxy");
Param.AssertNotNull(identifier, "identifier");
Param.Ignore(initializer);
this.identifier.Value = identifier;
this.initializer.Value = initializer;
}
/// <summary>
/// Initializes a new instance of the AttributeExpression class.
/// </summary>
/// <param name="proxy">Proxy object for the expression.</param>
/// <param name="target">The attribute target, if any.</param>
/// <param name="initialization">The attribute initialization call.</param>
internal AttributeExpression(CodeUnitProxy proxy, LiteralExpression target, Expression initialization)
: base(proxy, ExpressionType.Attribute)
{
Param.AssertNotNull(proxy, "proxy");
Param.Ignore(target);
Param.AssertNotNull(initialization, "initialization");
this.target.Value = target;
this.initialization.Value = initialization;
}
/// <summary>
/// Initializes a new instance of the AsExpression class.
/// </summary>
/// <param name="proxy">Proxy object for the expression.</param>
/// <param name="value">The value to convert.</param>
/// <param name="type">The type of the conversion.</param>
internal AsExpression(CodeUnitProxy proxy, Expression value, LiteralExpression type)
: base(proxy, ExpressionType.As)
{
Param.AssertNotNull(proxy, "proxy");
Param.AssertNotNull(value, "value");
Param.AssertNotNull(type, "type");
this.value.Value = value;
this.type.Value = CodeParser.ExtractTypeTokenFromLiteralExpression(type);
}
/// <summary>
/// Initializes a new instance of the VariableDeclarationExpression class.
/// </summary>
/// <param name="proxy">Proxy object for the expression.</param>
/// <param name="type">The type of the variable or variables being declared.</param>
/// <param name="declarators">The collection of declarators on the expression.</param>
internal VariableDeclarationExpression(CodeUnitProxy proxy, LiteralExpression type, ICollection<VariableDeclaratorExpression> declarators = null)
: base(proxy, ExpressionType.VariableDeclaration)
{
Param.AssertNotNull(proxy, "proxy");
Param.AssertNotNull(type, "type");
Param.Ignore(declarators);
this.type.Value = CodeParser.ExtractTypeTokenFromLiteralExpression(type);
if (declarators != null && declarators.Count > 0)
{
this.declarators.Value = new List<VariableDeclaratorExpression>(declarators);
}
}
/// <summary>
/// Initializes a new instance of the ChildAccessExpression class.
/// </summary>
/// <param name="proxy">Proxy object for the expression.</param>
/// <param name="type">The type of operation being performed.</param>
/// <param name="leftHandSide">The left side of the operation.</param>
/// <param name="rightHandSide">The member being accessed.</param>
internal ChildAccessExpression(
CodeUnitProxy proxy,
ExpressionType type,
Expression leftHandSide,
LiteralExpression rightHandSide)
: base(proxy, (int)type)
{
Param.AssertNotNull(proxy, "proxy");
Param.Ignore(type);
Param.AssertNotNull(leftHandSide, "leftHandSide");
Param.AssertNotNull(rightHandSide, "rightHandSide");
this.leftHandSide.Value = leftHandSide;
this.rightHandSide.Value = rightHandSide;
}
/// <summary>
/// Reads an expression starting with an unknown word.
/// </summary>
/// <param name="parentProxy">Represents the parent item.</param>
/// <param name="unsafeCode">Indicates whether the code is marked as unsafe.</param>
/// <returns>Returns the expression.</returns>
private LiteralExpression GetLiteralExpression(CodeUnitProxy parentProxy, bool unsafeCode)
{
Param.AssertNotNull(parentProxy, "parentProxy");
Param.Ignore(unsafeCode);
// Get the first symbol.
this.AdvanceToNextCodeSymbol(parentProxy);
Symbol symbol = this.PeekNextSymbol();
var expressionProxy = new CodeUnitProxy(this.document);
// First, check if this is a generic.
Token literalToken = null;
int temp;
bool generic = false;
if (symbol.SymbolType == SymbolType.Other && this.HasTypeSignature(1, false, out temp, out generic) && generic)
{
literalToken = this.GetGenericToken(expressionProxy, unsafeCode);
}
if (literalToken == null)
{
// This is not a generic. Just convert the symbol to a token.
literalToken = this.GetToken(expressionProxy, TokenType.Literal, SymbolType.Other);
}
// Create a literal expression from this token.
var literal = new LiteralExpression(expressionProxy, literalToken);
parentProxy.Children.Add(literal);
return literal;
}
/// <summary>
/// Gets a token representing a type identifier.
/// </summary>
/// <param name="parentProxy">Represents the parent item.</param>
/// <param name="unsafeCode">Indicates whether the code being parsed resides in an unsafe code block.</param>
/// <param name="includeArrayBrackets">Indicates whether to include array brackets in the type token.</param>
/// <param name="isExpression">Indicates whether this type token comes at the end of an 'is' expression.</param>
/// <returns>Returns the token.</returns>
private LiteralExpression GetTypeTokenExpression(CodeUnitProxy parentProxy, bool unsafeCode, bool includeArrayBrackets, bool isExpression)
{
Param.AssertNotNull(parentProxy, "parentProxy");
Param.Ignore(unsafeCode);
Param.Ignore(includeArrayBrackets);
Param.Ignore(isExpression);
this.AdvanceToNextCodeSymbol(parentProxy);
var expressionProxy = new CodeUnitProxy(this.document);
TypeToken token = this.GetTypeToken(expressionProxy, unsafeCode, includeArrayBrackets, isExpression);
// Create and return the literal expression.
var expression = new LiteralExpression(expressionProxy, token);
parentProxy.Children.Add(expression);
return expression;
}
/// <summary>
/// Parses and returns a constructor.
/// </summary>
/// <param name="elementProxy">Proxy for the element being created.</param>
/// <param name="parent">The parent of the element.</param>
/// <param name="unsafeCode">Indicates whether the code is marked as unsafe.</param>
/// <param name="generated">Indicates whether the code is marked as generated code.</param>
/// <param name="attributes">The attributes on the element.</param>
/// <returns>Returns the element.</returns>
private Constructor GetConstructor(CodeUnitProxy elementProxy, Element parent, bool unsafeCode, bool generated, ICollection<Attribute> attributes)
{
Param.AssertNotNull(elementProxy, "elementProxy");
Param.AssertNotNull(parent, "parent");
Param.Ignore(unsafeCode);
Param.Ignore(generated);
Param.Ignore(attributes);
// Get the modifiers and access.
AccessModifierType accessModifier = AccessModifierType.Private;
Dictionary<TokenType, Token> modifiers = this.GetElementModifiers(elementProxy, ref accessModifier, ConstructorModifiers);
unsafeCode |= modifiers.ContainsKey(TokenType.Unsafe);
// Get the name of the constructor.
Token name = this.GetElementNameToken(elementProxy, unsafeCode);
// Get the parameter list.
this.GetParameterList(elementProxy, unsafeCode, SymbolType.OpenParenthesis);
// Get the constructor initializer if there is one.
ConstructorInitializerStatement constructorInitializerStatement = null;
Symbol symbol = this.PeekNextSymbol();
if (symbol.SymbolType == SymbolType.Colon)
{
this.GetToken(elementProxy, TokenType.BaseColon, SymbolType.Colon);
var constructorInitializerStatementProxy = new CodeUnitProxy(this.document);
var constructorInitializerExpressionProxy = new CodeUnitProxy(this.document);
// The next symbol must be the keyword base or this.
symbol = this.PeekNextSymbol();
if (symbol.SymbolType != SymbolType.This && symbol.SymbolType != SymbolType.Base)
{
throw this.CreateSyntaxException();
}
var initializerNameExpressionProxy = new CodeUnitProxy(this.document);
Token initializerNameToken = this.GetToken(initializerNameExpressionProxy, TokenType.Literal, symbol.SymbolType);
// Get the name expression.
var initializerNameExpression = new LiteralExpression(initializerNameExpressionProxy, initializerNameToken);
constructorInitializerExpressionProxy.Children.Add(initializerNameExpression);
// Get the initializer expression.
var constructorInitializerExpression = this.GetMethodInvocationExpression(constructorInitializerExpressionProxy, initializerNameExpression, ExpressionPrecedence.None, unsafeCode);
constructorInitializerStatementProxy.Children.Add(constructorInitializerExpression);
// Create the constructor initializer statement
constructorInitializerStatement = new ConstructorInitializerStatement(constructorInitializerStatementProxy, constructorInitializerExpression);
elementProxy.Children.Add(constructorInitializerStatement);
}
var constructor = new Constructor(elementProxy, name.Text, attributes, unsafeCode);
// If the constructor is extern, it will not have a body.
if (modifiers.ContainsKey(TokenType.Extern))
{
// Get the closing semicolon.
this.GetToken(elementProxy, TokenType.Semicolon, SymbolType.Semicolon);
}
else
{
// Get the body.
this.ParseStatementContainer(elementProxy, constructor, true, unsafeCode);
}
return constructor;
}
/// <summary>
/// Parses and returns a field.
/// </summary>
/// <param name="elementProxy">Proxy for the element being created.</param>
/// <param name="parent">The parent of the element.</param>
/// <param name="unsafeCode">Indicates whether the code is marked as unsafe.</param>
/// <param name="generated">Indicates whether the code is marked as generated code.</param>
/// <param name="attributes">The attributes on the element.</param>
/// <returns>Returns the element.</returns>
private Field GetField(CodeUnitProxy elementProxy, Element parent, bool unsafeCode, bool generated, ICollection<Attribute> attributes)
{
Param.AssertNotNull(elementProxy, "elementProxy");
Param.AssertNotNull(parent, "parent");
Param.Ignore(unsafeCode);
Param.Ignore(generated);
Param.Ignore(attributes);
// Get the modifiers and access.
AccessModifierType accessModifier = AccessModifierType.Private;
Dictionary<TokenType, Token> modifiers = this.GetElementModifiers(elementProxy, ref accessModifier, FieldModifiers);
unsafeCode |= modifiers.ContainsKey(TokenType.Unsafe);
var declarationExpressionProxy = new CodeUnitProxy(this.document);
// Get the field type.
var fieldTypeExpressionProxy = new CodeUnitProxy(this.document);
TypeToken fieldType = this.GetTypeToken(fieldTypeExpressionProxy, unsafeCode, true);
var fieldTypeExpression = new LiteralExpression(fieldTypeExpressionProxy, fieldType);
declarationExpressionProxy.Children.Add(fieldTypeExpression);
// Get all of the variable declarators.
string firstFieldName = this.GetFieldDeclarators(declarationExpressionProxy, unsafeCode, fieldType);
if (string.IsNullOrWhiteSpace(firstFieldName))
{
throw this.CreateSyntaxException();
}
var variableDeclarationStatementProxy = new CodeUnitProxy(this.document);
var declarationExpression = new VariableDeclarationExpression(declarationExpressionProxy, fieldTypeExpression);
variableDeclarationStatementProxy.Children.Add(declarationExpression);
var variableDeclarationStatement = new VariableDeclarationStatement(variableDeclarationStatementProxy, declarationExpression);
elementProxy.Children.Add(variableDeclarationStatement);
var field = new Field(elementProxy, firstFieldName, attributes, fieldType, unsafeCode);
// Get the trailing semicolon.
this.GetToken(elementProxy, TokenType.Semicolon, SymbolType.Semicolon);
return field;
}
/// <summary>
/// Creates a new token and adds it to a new literal expression.
/// </summary>
/// <param name="parentProxy">Represents the parent item.</param>
/// <param name="symbolType">The type of the symbol.</param>
/// <param name="tokenType">The type of the token.</param>
/// <returns>Returns the literal expression.</returns>
private LiteralExpression CreateLiteralExpression(CodeUnitProxy parentProxy, SymbolType symbolType, TokenType tokenType)
{
Param.AssertNotNull(parentProxy, "parentProxy");
Param.Ignore(symbolType, tokenType);
this.AdvanceToNextCodeSymbol(parentProxy);
var expressionProxy = new CodeUnitProxy(this.document);
Token token = this.GetToken(expressionProxy, tokenType, symbolType);
var expression = new LiteralExpression(expressionProxy, token);
parentProxy.Children.Add(expression);
return expression;
}
/// <summary>
/// Reads the next goto-statement from the file and returns it.
/// </summary>
/// <param name="parentProxy">Represents the parent item.</param>
/// <param name="unsafeCode">Indicates whether the code being parsed resides in an unsafe code block.</param>
/// <returns>Returns the statement.</returns>
private GotoStatement GetGotoStatement(CodeUnitProxy parentProxy, bool unsafeCode)
{
Param.Ignore(unsafeCode);
Param.AssertNotNull(parentProxy, "parentProxy");
var statementProxy = new CodeUnitProxy(this.document);
// Move past the goto keyword.
this.GetToken(statementProxy, TokenType.Goto, SymbolType.Goto);
// Get the next symbol.
Symbol symbol = this.PeekNextSymbol();
Expression identifier = null;
if (symbol.SymbolType == SymbolType.Default)
{
CodeUnitProxy identifierProxy = new CodeUnitProxy(this.document);
Token token = this.GetToken(identifierProxy, TokenType.Literal, SymbolType.Default);
identifier = new LiteralExpression(identifierProxy, token);
statementProxy.Children.Add(identifier);
}
else if (symbol.SymbolType == SymbolType.Case)
{
this.GetToken(statementProxy, TokenType.Literal, SymbolType.Case);
identifier = this.GetNextExpression(statementProxy, ExpressionPrecedence.None, unsafeCode);
}
else
{
identifier = this.GetNextExpression(statementProxy, ExpressionPrecedence.None, unsafeCode);
}
// Get the closing semicolon.
this.GetToken(statementProxy, TokenType.Semicolon, SymbolType.Semicolon);
// Create and return the goto-statement.
var statement = new GotoStatement(statementProxy, identifier);
parentProxy.Children.Add(statement);
return statement;
}
/// <summary>
/// Parses and returns the declarators for an event.
/// </summary>
/// <param name="parentProxy">Represents the parent item.</param>
/// <param name="unsafeCode">Indicates whether the code is marked as unsafe.</param>
/// <param name="eventHandlerType">The event type.</param>
/// <returns>Returns the name of the first event.</returns>
private string GetEventDeclarators(CodeUnitProxy parentProxy, bool unsafeCode, TypeToken eventHandlerType)
{
Param.AssertNotNull(parentProxy, "parentProxy");
Param.Ignore(unsafeCode);
Param.AssertNotNull(eventHandlerType, "eventHandlerType");
string firstEventName = null;
Symbol symbol = this.PeekNextSymbol();
while (symbol.SymbolType != SymbolType.Semicolon && symbol.SymbolType != SymbolType.OpenCurlyBracket)
{
this.AdvanceToNextCodeSymbol(parentProxy);
var declaratorProxy = new CodeUnitProxy(this.document);
// Get the identifier.
var identifierExpressionProxy = new CodeUnitProxy(this.document);
Token identifier = this.GetElementNameToken(identifierExpressionProxy, unsafeCode, true);
if (firstEventName == null)
{
firstEventName = identifier.Text;
}
var identifierExpression = new LiteralExpression(identifierExpressionProxy, identifier);
declaratorProxy.Children.Add(identifierExpression);
Expression initialization = null;
// Check whether there is an equals sign.
symbol = this.PeekNextSymbol();
if (symbol.SymbolType == SymbolType.Equals)
{
this.GetOperatorSymbolToken(declaratorProxy, OperatorType.Equals);
initialization = this.GetNextExpression(declaratorProxy, ExpressionPrecedence.None, unsafeCode);
if (initialization == null)
{
throw this.CreateSyntaxException();
}
}
var declaratorExpression = new EventDeclaratorExpression(declaratorProxy, identifierExpression, initialization);
parentProxy.Children.Add(declaratorExpression);
// If the next symbol is a comma, continue.
symbol = this.PeekNextSymbol();
if (symbol.SymbolType == SymbolType.Comma)
{
this.GetToken(parentProxy, TokenType.Comma, SymbolType.Comma);
symbol = this.PeekNextSymbol();
}
}
return firstEventName;
}
/// <summary>
/// Parses and returns a event.
/// </summary>
/// <param name="elementProxy">Proxy for the element being created.</param>
/// <param name="parent">The parent of the element.</param>
/// <param name="unsafeCode">Indicates whether the code is marked as unsafe.</param>
/// <param name="generated">Indicates whether the code is marked as generated code.</param>
/// <param name="attributes">The attributes on the element.</param>
/// <returns>Returns the element.</returns>
private Event GetEvent(CodeUnitProxy elementProxy, Element parent, bool unsafeCode, bool generated, ICollection<Attribute> attributes)
{
Param.AssertNotNull(elementProxy, "elementProxy");
Param.AssertNotNull(parent, "parent");
Param.Ignore(unsafeCode);
Param.Ignore(generated);
Param.Ignore(attributes);
// Get the modifiers and access.
AccessModifierType accessModifier = AccessModifierType.Private;
// Events within interfaces always have the access of the parent interface.
Interface parentInterface = parent as Interface;
if (parentInterface != null)
{
accessModifier = parentInterface.AccessModifierType;
}
// Get declared modifiers.
Dictionary<TokenType, Token> modifiers = this.GetElementModifiers(elementProxy, ref accessModifier, EventModifiers);
unsafeCode |= modifiers.ContainsKey(TokenType.Unsafe);
// Get the event keyword.
this.GetToken(elementProxy, TokenType.Event, SymbolType.Event);
// Get the event type.
var eventHandlerTypeExpressionProxy = new CodeUnitProxy(this.document);
TypeToken eventHandlerType = this.GetTypeToken(eventHandlerTypeExpressionProxy, unsafeCode, true);
var eventHandlerTypeExpression = new LiteralExpression(eventHandlerTypeExpressionProxy, eventHandlerType);
elementProxy.Children.Add(eventHandlerTypeExpression);
// Get all of the event declarators.
string firstEventName = this.GetEventDeclarators(elementProxy, unsafeCode, eventHandlerType);
if (string.IsNullOrWhiteSpace(firstEventName))
{
throw this.CreateSyntaxException();
}
Event @event = new Event(elementProxy, firstEventName, attributes, eventHandlerType, unsafeCode);
Symbol symbol = this.PeekNextSymbol();
if (symbol.SymbolType == SymbolType.Semicolon)
{
this.GetToken(elementProxy, TokenType.Semicolon, SymbolType.Semicolon);
}
else
{
// Parse the body of the event.
this.ParseElementContainer(elementProxy, @event, unsafeCode);
}
return @event;
}
/// <summary>
/// Extracts a TypeToken from the literal expression, assuming that one exists.
/// </summary>
/// <param name="literal">The literal expression.</param>
/// <returns>Returns the type token.</returns>
internal static TypeToken ExtractTypeTokenFromLiteralExpression(LiteralExpression literal)
{
Param.AssertNotNull(literal, "literal");
TypeToken type = literal.Token as TypeToken;
if (type == null)
{
throw new SyntaxException(literal.Document, literal.LineNumber, Strings.LiteralExpressionDoesNotContainTypeToken);
}
return type;
}
/// <summary>
/// Reads an expression starting with an unknown word.
/// </summary>
/// <param name="parentProxy">Proxy object for the parent item.</param>
/// <returns>Returns the expression.</returns>
private LiteralExpression GetConditionalPreprocessorConstantExpression(CodeUnitProxy parentProxy)
{
Param.AssertNotNull(parentProxy, "parentProxy");
this.AdvanceToNextConditionalDirectiveCodeSymbol(parentProxy);
var expressionProxy = new CodeUnitProxy(this.document);
// Get the first symbol.
Symbol symbol = this.symbols.Peek(1);
CsLanguageService.Debug.Assert(symbol != null && symbol.SymbolType == SymbolType.Other, "Expected a text symbol");
// Convert the symbol to a token.
this.symbols.Advance();
var literalToken = new LiteralToken(this.document, symbol.Text, symbol.Location, this.symbols.Generated);
expressionProxy.Children.Add(literalToken);
// Create a literal expression from this token.
var literalExpression = new LiteralExpression(expressionProxy, literalToken);
parentProxy.Children.Add(literalExpression);
return literalExpression;
}
/// <summary>
/// Parses and returns the declarators for a field.
/// </summary>
/// <param name="parentProxy">Represents the parent item.</param>
/// <param name="unsafeCode">Indicates whether the code is marked as unsafe.</param>
/// <param name="fieldType">The field type.</param>
/// <returns>Returns the name of the first field.</returns>
private string GetFieldDeclarators(CodeUnitProxy parentProxy, bool unsafeCode, TypeToken fieldType)
{
Param.AssertNotNull(parentProxy, "parentProxy");
Param.Ignore(unsafeCode);
Param.AssertNotNull(fieldType, "fieldType");
string firstFieldName = null;
Symbol symbol = this.PeekNextSymbol();
while (symbol.SymbolType != SymbolType.Semicolon)
{
this.AdvanceToNextCodeSymbol(parentProxy);
var declaratorProxy = new CodeUnitProxy(this.document);
// Get the identifier.
var identifierExpressionProxy = new CodeUnitProxy(this.document);
Token identifier = this.GetElementNameToken(identifierExpressionProxy, unsafeCode, true);
var identifierExpression = new LiteralExpression(identifierExpressionProxy, identifier);
declaratorProxy.Children.Add(identifierExpression);
if (firstFieldName == null)
{
firstFieldName = identifier.Text;
}
Expression initialization = null;
// Check whether there is an equals sign.
symbol = this.PeekNextSymbol();
if (symbol.SymbolType == SymbolType.Equals)
{
this.GetOperatorSymbolToken(declaratorProxy, OperatorType.Equals);
// Get the expression after the equals sign. If the expression starts with an
// opening curly bracket, then this is an initialization expression or an
// anonymous type initialization expression.
symbol = this.PeekNextSymbol();
if (symbol.SymbolType == SymbolType.OpenCurlyBracket)
{
// Determine whether this is an array or an anonymous type.
if (fieldType.Text == "var" || (
fieldType.Text != "Array" && fieldType.Text != "System.Array" && !fieldType.Text.Contains("[")))
{
initialization = this.GetAnonymousTypeInitializerExpression(declaratorProxy, unsafeCode);
}
else
{
initialization = this.GetArrayInitializerExpression(declaratorProxy, unsafeCode);
}
}
else
{
initialization = this.GetNextExpression(declaratorProxy, ExpressionPrecedence.None, unsafeCode);
}
if (initialization == null)
{
throw this.CreateSyntaxException();
}
}
var declaratorExpression = new VariableDeclaratorExpression(declaratorProxy, identifierExpression, initialization);
parentProxy.Children.Add(declaratorExpression);
// If the next symbol is a comma, continue.
symbol = this.PeekNextSymbol();
if (symbol.SymbolType == SymbolType.Comma)
{
this.GetToken(parentProxy, TokenType.Comma, SymbolType.Comma);
symbol = this.PeekNextSymbol();
}
}
// Return the declarators as a read-only collection.
return firstFieldName;
}