/// <summary>
/// Reads the next token from the stream. If it's not a literal,
/// throws an exception.
/// </summary>
private LiteralToken ReadNextAsLiteral()
{
Token nextToken = ReadNextToken();
bool isNegative = false;
if ((nextToken is OperatorToken) &&
(nextToken.Name == "-"))
{
isNegative = true;
nextToken = ReadNextToken();
}
if (!(nextToken is LiteralToken))
{
throw new CompilerMessage(ErrorCode.UnexpectedToken, "Literal expected at '" + nextToken.Name + "'");
}
Token tokenToReturn = nextToken;
if (isNegative)
{
if (_source == null)
{
throw new CompilerMessage(ErrorCode.InternalError, "Internal error: attempted to use tokenized script with no source");
}
tokenToReturn = _source.FindTokenWithName("-" + nextToken.Name);
if (tokenToReturn == null)
{
tokenToReturn = new LiteralToken("-" + nextToken.Name);
_source.AddToken(tokenToReturn);
}
}
return((LiteralToken)tokenToReturn);
}
private void ParseAndAddMemberToStruct(Token variableType, Token structName, ScriptStruct structDefinition, Token parentStruct)
{
_source.IgnoreAsteriskIfPresent();
Token memberName = _source.ReadNextToken();
if ((memberName is KeywordToken) || (memberName is OperatorToken) ||
(memberName is ModifierToken))
{
throw new CompilerMessage(ErrorCode.TokenAlreadyDefined, "Cannot use '" + memberName.Name + "' as variable name since it has another meaning");
}
string mangledName;
memberName = GetTokenForStructMember(structName, memberName, out mangledName);
if (memberName != null)
{
throw new CompilerMessage(ErrorCode.TokenAlreadyDefined, "Member '" + mangledName + "' already exists");
}
memberName = new Token(mangledName, true);
// TODO: Set necessary fields on new token for this struct member
_tokenizedScript.AddToken(memberName);
CompilerUtils.SetArrayPropertiesOnTokenFromStream(_source, memberName);
if (_source.NextIsKeyword(PredefinedSymbol.OpenParenthesis))
{
VerifyModifiersAgainstType(ModifierTargets.MemberFunction);
VerifyReturnTypeValidForFunction(variableType);
ScriptFunction func = new ScriptFunction(variableType, memberName);
ParseFunctionParameterList(func);
func.IsPrototypeOnly = true;
}
else
{
VerifyModifiersAgainstType(ModifierTargets.MemberVariable);
ProcessVariableDeclaration(variableType, structDefinition, parentStruct, _state.NextTokenModifiers);
}
}