private void AssertValid(Token token, string errorMessage, Func<Token, bool> isValid)
{
if (token == null)
{
throw new ApplicationException(errorMessage);
}
if (!isValid(token))
{
LogError(token, errorMessage);
}
}
private void LogError(Token token, string errorMessage)
{
throw new ApplicationException(string.Format("{0}\n\tToken: {1}\n\tLine Number: {2}\n\tCharacter: {3}", errorMessage, token.RawValue, token.LineNumber, token.CharacterNumber));
}
public List<Token> GetTokens()
{
var index = 0;
var currentLine = 1;
var currentCharacter = 1;
var currentWord = "";
while (index < _input.Length)
{
var character = _input.Substring(index, 1);
if (Regex.Match(character, IdentifierTokenMatch).Captures.Count > 0)
{
currentWord += character;
}
else
{
if (!String.IsNullOrWhiteSpace(currentWord))
{
var wordToken = new Token
{
RawValue = currentWord,
Type = TokenType.Keyword,
LineNumber = currentLine,
CharacterNumber = currentCharacter - currentWord.Length
};
_tokens.Add(wordToken);
currentWord = "";
}
if (!String.IsNullOrWhiteSpace(character))
{
var charToken = new Token
{
RawValue = character,
LineNumber = currentLine,
CharacterNumber = currentCharacter
};
switch (character)
{
case "{":
charToken.Type = TokenType.ScopeUp;
break;
case "}":
charToken.Type = TokenType.ScopeDown;
break;
case "@":
charToken.Type = TokenType.StartLabel;
break;
case "(":
charToken.Type = TokenType.StartFunction;
break;
case ":":
charToken.Type = TokenType.EndParameterName;
break;
case ")":
charToken.Type = TokenType.EndFunction;
break;
case ",":
charToken.Type = TokenType.EndParameterValue;
break;
case "[":
charToken.Type = TokenType.StartArray;
break;
case "]":
charToken.Type = TokenType.EndArray;
break;
case "#":
charToken.Type = TokenType.StartColor;
break;
case ";":
charToken.Type = TokenType.TerminateStatement;
break;
default:
throw new ApplicationException("Invalid character (Line " + currentLine + "): " + character);
}
_tokens.Add(charToken);
}
else if (character == "\n")
{
++currentLine;
currentCharacter = 0;
}
}
++currentCharacter;
++index;
}
return _tokens;
}