/// <summary>
/// Creates a new token list by cloning outerTokens with a specified range (range is exclusive, not inclusive)
/// </summary>
public TokenList(TokenList outerTokens, int fromToken, int toToken)
{
// do copy
for (var i = fromToken; fromToken < toToken; fromToken++)
{
tokens.Add(outerTokens.tokens[fromToken]);
}
}
public static void Expect(TokenList tl, TokenType type, string value)
{
Token t = tl.Next();
if ((t.Type == type) && (t.Value == value))
{
tl.Consume();
}
else
{
string expectedType = TokenTypeToString(type);
string expectedValue = value;
string foundType = TokenTypeToString(t.Type);
string foundValue = t.Value;
ExceptionType exceptionType = (type == TokenType.KEYWORD)
? ExceptionType.UnknownSymbol
: ExceptionType.Syntax;
throw new EngineException(exceptionType,
string.Format("Expected '{0}' with Value '{1}' found '{2}' with Value '{3}'", expectedType,
expectedValue, foundType, foundValue), t);
}
}
public static string Expect(TokenList tl, TokenType type)
{
return Expect(tl, type, true);
}
public static string Expect(TokenList tl, TokenType type, bool consume)
{
Token t = tl.Next();
if (t.Type == type)
{
if (consume)
tl.Consume();
return t.Value;
}
string expectedType = TokenTypeToString(type);
string foundType = TokenTypeToString(t.Type);
throw new EngineException(ExceptionType.Syntax, string.Format("Expected '{0}' found '{1}' with Value '{2}'", expectedType, foundType, tl.Next().Value), t);
}