/// <summary>
/// Parses an element's parameter list.
/// </summary>
/// <param name="elementReference">
/// A reference to the element being created.
/// </param>
/// <param name="unsafeCode">
/// Indicates whether the code is marked as unsafe.
/// </param>
/// <param name="openingBracketType">
/// The type of the bracket which opens the parameter list.
/// </param>
/// <param name="staticMethod">
/// Indicates whether the parameters are part of a static method.
/// </param>
/// <returns>
/// Returns the collection of parameters.
/// </returns>
private IList<Parameter> ParseParameterList(Reference<ICodePart> elementReference, bool unsafeCode, SymbolType openingBracketType, bool staticMethod)
{
Param.AssertNotNull(elementReference, "elementReference");
Param.Ignore(unsafeCode);
Param.Ignore(openingBracketType);
Param.Ignore(staticMethod);
CsTokenType openingBracketTokenType = CsTokenType.OpenParenthesis;
CsTokenType closingBracketTokenType = CsTokenType.CloseParenthesis;
SymbolType closingBracketType = SymbolType.CloseParenthesis;
if (openingBracketType == SymbolType.OpenSquareBracket)
{
openingBracketTokenType = CsTokenType.OpenSquareBracket;
closingBracketTokenType = CsTokenType.CloseSquareBracket;
closingBracketType = SymbolType.CloseSquareBracket;
}
else
{
Debug.Assert(openingBracketType == SymbolType.OpenParenthesis, "The opening bracket type can only be a parenthesis or a square bracket.");
}
// Get the opening bracket.
Bracket openingParenthesis = this.GetBracketToken(openingBracketTokenType, openingBracketType, elementReference);
Node<CsToken> openingParenthesisNode = this.tokens.InsertLast(openingParenthesis);
// Get each of the parameters.
Symbol symbol = this.GetNextSymbol(elementReference);
List<Parameter> parameters = new List<Parameter>();
while (symbol.SymbolType != closingBracketType)
{
Reference<ICodePart> parameterReference = new Reference<ICodePart>();
Node<CsToken> previousToken = this.tokens.Last;
// Collect attributes on the parameter.
while (symbol.SymbolType == SymbolType.OpenSquareBracket)
{
Attribute attribute = this.GetAttribute(parameterReference, unsafeCode);
if (attribute == null)
{
throw this.CreateSyntaxException();
}
this.tokens.Add(attribute);
symbol = this.GetNextSymbol(parameterReference);
}
ParameterModifiers modifiers = ParameterModifiers.None;
// If there is a parameter modifier, get it.
if (symbol.SymbolType == SymbolType.Ref)
{
this.tokens.Add(this.GetToken(CsTokenType.Ref, SymbolType.Ref, parameterReference));
modifiers |= ParameterModifiers.Ref;
}
else if (symbol.SymbolType == SymbolType.Out)
{
this.tokens.Add(this.GetToken(CsTokenType.Out, SymbolType.Out, parameterReference));
modifiers |= ParameterModifiers.Out;
}
else if (symbol.SymbolType == SymbolType.Params)
{
this.tokens.Add(this.GetToken(CsTokenType.Params, SymbolType.Params, parameterReference));
modifiers |= ParameterModifiers.Params;
}
else if (symbol.SymbolType == SymbolType.This)
{
// The this keyword indicates that this is an extension method. This is only allowed if
// both of the following are true:
// 1. This must be the first parameter.
// 2. The element must be a static method.
if (parameters.Count == 0 && staticMethod)
{
this.tokens.Add(this.GetToken(CsTokenType.This, SymbolType.This, parameterReference));
modifiers |= ParameterModifiers.This;
}
}
// Get the parameter type.
TypeToken parameterType = this.GetTypeToken(parameterReference, unsafeCode, true);
CsToken parameterName = null;
if (parameterType.Text.Equals("__arglist", StringComparison.Ordinal))
{
// When the parameterType is __arglist, this means that there is actually no parameter type at
// all, and the parameter name should be set to the __arglist token.
parameterName = parameterType.ChildTokens.First.Value;
parameterType = null;
parameterName.ParentRef = parameterReference;
this.tokens.Add(parameterName);
}
else
{
this.tokens.Add(parameterType);
// Get the parameter name.
parameterName = this.GetToken(CsTokenType.Other, SymbolType.Other, parameterReference);
parameterName.ParentRef = parameterReference;
this.tokens.Add(parameterName);
}
// Get the optional default value for the parameter.
Expression defaultArgument = null;
symbol = this.GetNextSymbol(parameterReference);
if (symbol.SymbolType == SymbolType.Equals)
{
this.tokens.Add(this.GetOperatorToken(OperatorType.Equals, parameterReference));
// Get the default value expression.
defaultArgument = this.GetNextExpression(ExpressionPrecedence.None, parameterReference, unsafeCode);
}
// Create the list of tokens comprising the parameter, and trim any whitespace off the beginning and end.
CsTokenList tokenList = new CsTokenList(this.tokens, previousToken.Next, this.tokens.Last);
tokenList.Trim();
Parameter parameter = new Parameter(
parameterType,
parameterName.Text,
elementReference,
modifiers,
defaultArgument,
parameterType == null ? parameterName.Location : CodeLocation.Join(parameterType.Location, parameterName.Location),
tokenList,
parameterType == null ? parameterName.Generated : parameterType.Generated || parameterName.Generated);
parameterReference.Target = parameter;
parameters.Add(parameter);
if (defaultArgument != null)
{
IWriteableCodeUnit writeableCodeUnit = (IWriteableCodeUnit)defaultArgument;
writeableCodeUnit.SetParent(parameter);
}
// If the next symbol, is a comma, get the next parameter.
symbol = this.GetNextSymbol(elementReference);
if (symbol.SymbolType == SymbolType.Comma)
{
this.tokens.Add(this.GetToken(CsTokenType.Comma, SymbolType.Comma, elementReference));
symbol = this.GetNextSymbol(elementReference);
}
}
// Get the closing bracket.
Bracket closingParenthesis = this.GetBracketToken(closingBracketTokenType, closingBracketType, elementReference);
Node<CsToken> closingParenthesisNode = this.tokens.InsertLast(closingParenthesis);
openingParenthesis.MatchingBracketNode = closingParenthesisNode;
closingParenthesis.MatchingBracketNode = openingParenthesisNode;
// Return the parameters as a read-only collection.
return parameters.ToArray();
}
/// <summary>
/// Fills in the details of the set accessor.
/// </summary>
/// <param name="parent">
/// The parent of the accessor.
/// </param>
private void FillSetAccessorDetails(CsElement parent)
{
Param.AssertNotNull(parent, "parent");
Reference<ICodePart> accessorReference = new Reference<ICodePart>(this);
Property property = parent as Property;
if (property != null)
{
// Set accessors on properties do not have a return type but have an
// implied input parameter.
this.returnType = CreateVoidTypeToken(accessorReference);
this.parameters = new[]
{
new Parameter(
property.ReturnType,
"value",
accessorReference,
ParameterModifiers.None,
null,
CodeLocation.Empty,
null,
property.ReturnType.Generated)
};
}
else
{
// Set accessors on indexers do not have a return type but, but have the input
// parameters of the parent indexer.
Indexer indexer = (Indexer)parent;
this.returnType = CreateVoidTypeToken(accessorReference);
Parameter[] tempParameters = new Parameter[indexer.Parameters.Count + 1];
int i = 0;
foreach (Parameter parameter in indexer.Parameters)
{
tempParameters[i++] = parameter;
}
// Add the implicit value parameter since this is a set accessor.
tempParameters[i] = new Parameter(
indexer.ReturnType, "value", accessorReference, ParameterModifiers.None, null, CodeLocation.Empty, null, indexer.ReturnType.Generated);
this.parameters = tempParameters;
}
}
/// <summary>
/// Parses an anonymous method or lambda expression's parameter list.
/// </summary>
/// <param name="elementReference">
/// A reference to the element being created.
/// </param>
/// <param name="unsafeCode">
/// Indicates whether the code is marked as unsafe.
/// </param>
/// <returns>
/// Returns the collection of parameters.
/// </returns>
private ICollection<Parameter> ParseAnonymousMethodParameterList(Reference<ICodePart> elementReference, bool unsafeCode)
{
Param.AssertNotNull(elementReference, "elementReference");
Param.Ignore(unsafeCode);
// Get the opening bracket.
Bracket openingParenthesis = this.GetBracketToken(CsTokenType.OpenParenthesis, SymbolType.OpenParenthesis, elementReference);
Node<CsToken> openingParenthesisNode = this.tokens.InsertLast(openingParenthesis);
List<Parameter> parameters = new List<Parameter>();
// Get each of the parameters.
Symbol symbol = this.GetNextSymbol(elementReference);
while (symbol.SymbolType != SymbolType.CloseParenthesis)
{
Reference<ICodePart> parameterReference = new Reference<ICodePart>();
Node<CsToken> previousToken = this.tokens.Last;
ParameterModifiers modifiers = ParameterModifiers.None;
// If there is a parameter modifier, get it.
if (symbol.SymbolType == SymbolType.Ref)
{
this.tokens.Add(this.GetToken(CsTokenType.Ref, SymbolType.Ref, parameterReference));
modifiers |= ParameterModifiers.Ref;
}
else if (symbol.SymbolType == SymbolType.Out)
{
this.tokens.Add(this.GetToken(CsTokenType.Out, SymbolType.Out, parameterReference));
modifiers |= ParameterModifiers.Out;
}
else if (symbol.SymbolType == SymbolType.Params)
{
this.tokens.Add(this.GetToken(CsTokenType.Params, SymbolType.Params, parameterReference));
modifiers |= ParameterModifiers.Params;
}
// The first token is either the parameter type in an explicit parameter list, or the parameter name
// in an implicit parameter list.
TypeToken firstToken = this.GetTypeToken(parameterReference, unsafeCode, true);
// Peek ahead and look at the type of the next token.
int index = this.GetNextCodeSymbolIndex(1);
if (index == -1)
{
throw this.CreateSyntaxException();
}
symbol = this.symbols.Peek(index);
if (symbol.SymbolType == SymbolType.Comma || symbol.SymbolType == SymbolType.CloseParenthesis)
{
// There is no type.
if (firstToken.ChildTokens.Count > 1)
{
throw this.CreateSyntaxException();
}
CsToken nameToken = firstToken.ChildTokens.First.Value;
nameToken.ParentRef = parameterReference;
this.tokens.Add(nameToken);
Parameter parameter = new Parameter(
null,
nameToken.Text,
elementReference,
modifiers,
null,
nameToken.Location,
new CsTokenList(this.tokens, previousToken.Next, this.tokens.Last),
nameToken.Generated);
parameterReference.Target = parameter;
parameters.Add(parameter);
}
else
{
// There is a type and a name.
this.tokens.Add(firstToken);
// Get the parameter name.
CsToken nameToken = this.GetToken(CsTokenType.Other, SymbolType.Other, parameterReference);
this.tokens.Add(nameToken);
Parameter parameter = new Parameter(
firstToken,
nameToken.Text,
elementReference,
modifiers,
null,
CodeLocation.Join(firstToken.Location, nameToken.Location),
new CsTokenList(this.tokens, previousToken.Next, this.tokens.Last),
firstToken.Generated || nameToken.Generated);
parameterReference.Target = parameter;
parameters.Add(parameter);
}
// If the next symbol is a comma, get the next parameter.
symbol = this.GetNextSymbol(elementReference);
if (symbol.SymbolType == SymbolType.Comma)
{
this.tokens.Add(this.GetToken(CsTokenType.Comma, SymbolType.Comma, elementReference));
symbol = this.GetNextSymbol(elementReference);
}
}
// Get the closing bracket.
Bracket closingParenthesis = this.GetBracketToken(CsTokenType.CloseParenthesis, SymbolType.CloseParenthesis, elementReference);
Node<CsToken> closingParenthesisNode = this.tokens.InsertLast(closingParenthesis);
openingParenthesis.MatchingBracketNode = closingParenthesisNode;
closingParenthesis.MatchingBracketNode = openingParenthesisNode;
return parameters;
}
/// <summary>
/// Adds a parameter to the expression.
/// </summary>
/// <param name="parameter">
/// The parameter to add.
/// </param>
internal void AddParameter(Parameter parameter)
{
Param.AssertNotNull(parameter, "parameter");
if (this.parameters == null)
{
this.parameters = new List<Parameter>();
}
this.parameters.Add(parameter);
}
