private LambdaParser()
{
_pool = new NormStr.Pool();
_kwt = new KeyWordTable(_pool);
InitKeyWordTable();
_lex = new Lexer(_pool, _kwt);
}
/// <summary>
/// The constructor. Caller must provide the name pool and key word table.
/// </summary>
public Lexer(NormStr.Pool pool, KeyWordTable kwt)
{
Contracts.AssertValue(pool);
Contracts.AssertValue(kwt);
_pool = pool;
_kwt = kwt;
}