private string CreateUnexpectedMessage(AphidToken token)
{
return string.Format(
"Unexpected {0} ({1}) at offset {2}",
token.TokenType,
token.Lexeme,
token.Index);
}
public AphidParserException(AphidToken unexpectedToken, AphidTokenType expectedToken)
{
UnexpectedToken = unexpectedToken;
ExpectedToken = expectedToken;
_message = string.Format(
"{0}; expected {1}.",
CreateUnexpectedMessage(unexpectedToken),
expectedToken);
}
public bool NextToken()
{
_tokenIndex++;
if (_tokenIndex < _tokens.Count)
{
_currentToken = _tokens[_tokenIndex];
return true;
}
else
{
_currentToken = default(AphidToken);
return false;
}
}
protected void AssertTokens(string script, AphidToken[] tokens)
{
var tokens2 = GetTokens(script);
Assert.AreEqual(tokens.Length, tokens2.Count);
for (int i = 0; i < tokens.Length; i++)
{
Assert.AreEqual(tokens[i].TokenType, tokens2[i].TokenType);
if (tokens[i].Lexeme != null)
{
Assert.AreEqual(tokens[i].Lexeme, tokens2[i].Lexeme);
}
}
}
static string GetCodeExcerpt(string code, AphidToken token)
{
var matches = Regex.Matches(code, @"(\r\n)|\r|\n").OfType<Match>().ToArray();
var firstAfter = matches.FirstOrDefault(x => x.Index > token.Index);
int line;
if (firstAfter != null)
{
line = Array.IndexOf(matches, firstAfter);
}
else
{
line = matches.Count();
}
var lines = code.Replace("\r\n", "\n").Replace('\r', '\n').Replace("\n", "\r\n").Split(new[] { "\r\n" }, StringSplitOptions.None);
var loc = lines[line];
return string.Format("({0}) {1}", line, loc);
}
private TextCellType GetTokenColor(AphidToken t)
{
switch (t.TokenType)
{
case AphidTokenType.String:
case AphidTokenType.Number:
case AphidTokenType.HexNumber:
return TextCellType.Literal;
case AphidTokenType.Identifier:
return TextCellType.Identifier;
case AphidTokenType.breakKeyword:
case AphidTokenType.catchKeyword:
case AphidTokenType.defaultKeyword:
case AphidTokenType.definedKeyword:
case AphidTokenType.deleteKeyword:
case AphidTokenType.elseKeyword:
case AphidTokenType.extendKeyword:
case AphidTokenType.falseKeyword:
case AphidTokenType.finallyKeyword:
case AphidTokenType.forKeyword:
case AphidTokenType.ifKeyword:
case AphidTokenType.inKeyword:
case AphidTokenType.nullKeyword:
case AphidTokenType.retKeyword:
case AphidTokenType.switchKeyword:
case AphidTokenType.thisKeyword:
case AphidTokenType.trueKeyword:
case AphidTokenType.tryKeyword:
case AphidTokenType.whileKeyword:
case AphidTokenType.functionOperator:
case AphidTokenType.LoadLibraryOperator:
case AphidTokenType.LoadScriptOperator:
case AphidTokenType.PatternMatchingOperator:
return TextCellType.Keyword;
case AphidTokenType.AdditionOperator:
case AphidTokenType.AndOperator:
case AphidTokenType.AssignmentOperator:
case AphidTokenType.BinaryAndOperator:
case AphidTokenType.BinaryOrOperator:
case AphidTokenType.ColonOperator:
case AphidTokenType.ComplementOperator:
case AphidTokenType.DecrementOperator:
case AphidTokenType.DivisionEqualOperator:
case AphidTokenType.DivisionOperator:
case AphidTokenType.EqualityOperator:
case AphidTokenType.GreaterThanOperator:
case AphidTokenType.GreaterThanOrEqualOperator:
case AphidTokenType.IncrementOperator:
case AphidTokenType.LessThanOperator:
case AphidTokenType.LessThanOrEqualOperator:
case AphidTokenType.MinusEqualOperator:
case AphidTokenType.MinusOperator:
case AphidTokenType.ModulusEqualOperator:
case AphidTokenType.ModulusOperator:
case AphidTokenType.MultiplicationEqualOperator:
case AphidTokenType.MultiplicationOperator:
case AphidTokenType.NotEqualOperator:
case AphidTokenType.NotOperator:
case AphidTokenType.OrEqualOperator:
case AphidTokenType.OrOperator:
case AphidTokenType.PipelineOperator:
case AphidTokenType.PlusEqualOperator:
case AphidTokenType.XorEqualOperator:
case AphidTokenType.XorOperator:
case AphidTokenType.MemberOperator:
return TextCellType.Operator;
case AphidTokenType.LeftBrace:
case AphidTokenType.RightBrace:
case AphidTokenType.LeftBracket:
case AphidTokenType.RightBracket:
case AphidTokenType.LeftParenthesis:
case AphidTokenType.RightParenthesis:
return TextCellType.Delimiter;
case AphidTokenType.Comment:
return TextCellType.Comment;
default:
return TextCellType.Text;
}
}
public AphidParserException(AphidToken token)
{
Token = token;
}
public AphidParserException(AphidToken unexpectedToken)
{
UnexpectedToken = unexpectedToken;
_message = CreateUnexpectedMessage(unexpectedToken) + ".";
}
public InterpreterException(string message, AphidToken token)
{
Message = message;
Token = token;
}
public static string GetCodeExcerpt(string code, AphidToken token, int surroundingLines = 4)
{
var matches = Regex.Matches(code, @"(\r\n)|\r|\n").OfType<Match>().ToArray();
var firstAfter = matches.FirstOrDefault(x => x.Index > token.Index);
int line;
if (firstAfter != null)
{
line = Array.IndexOf(matches, firstAfter);
}
else
{
line = matches.Count();
}
var lines = code.Replace("\r\n", "\n").Replace('\r', '\n').Replace("\n", "\r\n").Split(new[] { "\r\n" }, StringSplitOptions.None);
var sb = new StringBuilder();
for (int i = line - surroundingLines; i < line + surroundingLines + 1; i++)
{
if (i > 0 && i < lines.Length)
{
sb.AppendLine(string.Format("({0}) {1}", i, lines[i]));
}
}
return sb.ToString();
}
