/// <summary>
/// Reads a cast expression.
/// </summary>
/// <param name="unsafeCode">
/// Indicates whether the code being parsed resides in an unsafe code block.
/// </param>
/// <returns>
/// Returns the expression.
/// </returns>
private CastExpression GetCastExpression(bool unsafeCode)
{
Param.Ignore(unsafeCode);
Reference<ICodePart> expressionReference = new Reference<ICodePart>();
// Get the opening parenthesis.
Bracket openParenthesis = this.GetBracketToken(CsTokenType.OpenParenthesis, SymbolType.OpenParenthesis, expressionReference);
Node<CsToken> openParenthesisNode = this.tokens.InsertLast(openParenthesis);
// Get the next token. It must be an unknown word.
this.GetNextSymbol(SymbolType.Other, expressionReference);
// Get the casted expression.
LiteralExpression type = this.GetTypeTokenExpression(expressionReference, unsafeCode, true);
if (type == null || type.Tokens.First == null)
{
throw this.CreateSyntaxException();
}
// Get the closing parenthesis.
Bracket closeParenthesis = this.GetBracketToken(CsTokenType.CloseParenthesis, SymbolType.CloseParenthesis, expressionReference);
Node<CsToken> closeParenthesisNode = this.tokens.InsertLast(closeParenthesis);
openParenthesis.MatchingBracketNode = closeParenthesisNode;
closeParenthesis.MatchingBracketNode = openParenthesisNode;
// Get the embedded expression being casted.
Expression castedExpression = this.GetNextExpression(ExpressionPrecedence.Unary, expressionReference, unsafeCode);
if (castedExpression == null || castedExpression.Tokens.First == null)
{
throw this.CreateSyntaxException();
}
// Create the token list for the expression.
CsTokenList partialTokens = new CsTokenList(this.tokens, openParenthesisNode, this.tokens.Last);
// Create and return the expression.
CastExpression expression = new CastExpression(partialTokens, type, castedExpression);
expressionReference.Target = expression;
return expression;
}
/// <summary>
/// The save.
/// </summary>
/// <param name="castExpression">
/// The cast expression.
/// </param>
private void Save(CastExpression castExpression)
{
this.cppWriter.Write("safe_cast<");
this.Save(castExpression.Type, this.cppWriter, SavingOptions.None);
this.cppWriter.Write(">(");
@switch(castExpression.CastedExpression);
this.cppWriter.Write(")");
}
