private bool IsKeyword(string symbol, out Token terminalToken)
{
var lookAheadChar = GetLookAheadChar();
if (!IsInSymbolAsIdentifierState(lookAheadChar)
&&
!IsCanonicalFunctionCall(symbol, lookAheadChar)
&&
InternalKeywordDictionary.ContainsKey(symbol))
{
ResetSymbolAsIdentifierState(true);
var keywordID = InternalKeywordDictionary[symbol];
if (keywordID == CqlParser.AS)
{
// Treat the symbol following AS keyword as an identifier.
// Note that this state will be turned off by a punctuator, so in case of function definitions:
// FUNCTION identifier(...) AS (generalExpr)
// the generalExpr will not be affected by the state.
_symbolAsAliasIdentifierState = true;
}
else if (keywordID == CqlParser.FUNCTION)
{
// Treat the symbol following FUNCTION keyword as an identifier.
// Inline function names in definition section have stronger restrictions than normal identifiers
_symbolAsInlineFunctionNameState = true;
}
terminalToken = NewToken(keywordID, new TerminalToken(symbol, _iPos));
return(true);
}
else
{
terminalToken = null;
return(false);
}
}
// <summary>
// returns true if given term is a eSQL keyword
// </summary>
internal static bool IsReservedKeyword(string term)
{
return(InternalKeywordDictionary.ContainsKey(term));
}