public Grammar() : this(true) { } //case sensitive by default
public Grammar(bool caseSensitive)
{
_currentGrammar = this;
this.CaseSensitive = caseSensitive;
bool ignoreCase = !this.CaseSensitive;
LanguageStringComparer = StringComparer.Create(System.Globalization.CultureInfo.InvariantCulture, ignoreCase);
StringComparisonMode = CaseSensitive ? StringComparison.InvariantCulture : StringComparison.InvariantCultureIgnoreCase;
KeyTerms = new KeyTermTable(LanguageStringComparer);
//Initialize console attributes
ConsoleTitle = Resources.MsgDefaultConsoleTitle;
ConsoleGreeting = string.Format(Resources.MsgDefaultConsoleGreeting, this.GetType().Name);
ConsolePrompt = ">";
ConsolePromptMoreInput = ".";
OperatorMappings = OperatorUtility.GetDefaultOperatorMappings(caseSensitive);
}
public static OperatorInfoDictionary GetDefaultOperatorMappings(bool caseSensitive)
{
var dict = new OperatorInfoDictionary(caseSensitive);
int p = 0; //precedence
p += 10;
dict.Add("=", ExpressionType.Assign, p);
dict.Add("+=", ExpressionType.AddAssignChecked, p);
dict.Add("-=", ExpressionType.SubtractAssignChecked, p);
dict.Add("*=", ExpressionType.MultiplyAssignChecked, p);
dict.Add("/=", ExpressionType.DivideAssign, p);
dict.Add("%=", ExpressionType.ModuloAssign, p);
dict.Add("|=", ExpressionType.OrAssign, p);
dict.Add("&=", ExpressionType.AndAssign, p);
dict.Add("^=", ExpressionType.ExclusiveOrAssign, p);
p += 10;
dict.Add("==", ExpressionType.Equal, p);
dict.Add("!=", ExpressionType.NotEqual, p);
dict.Add("<>", ExpressionType.NotEqual, p);
p += 10;
dict.Add("<", ExpressionType.LessThan, p);
dict.Add("<=", ExpressionType.LessThanOrEqual, p);
dict.Add(">", ExpressionType.GreaterThan, p);
dict.Add(">=", ExpressionType.GreaterThanOrEqual, p);
p += 10;
dict.Add("|", ExpressionType.Or, p);
dict.Add("or", ExpressionType.Or, p);
dict.Add("||", ExpressionType.OrElse, p);
dict.Add("orelse", ExpressionType.OrElse, p);
dict.Add("^", ExpressionType.ExclusiveOr, p);
dict.Add("xor", ExpressionType.ExclusiveOr, p);
p += 10;
dict.Add("&", ExpressionType.And, p);
dict.Add("and", ExpressionType.And, p);
dict.Add("&&", ExpressionType.AndAlso, p);
dict.Add("andalso", ExpressionType.AndAlso, p);
p += 10;
dict.Add("!", ExpressionType.Not, p);
dict.Add("not", ExpressionType.Not, p);
p += 10;
dict.Add("<<", ExpressionType.LeftShift, p);
dict.Add(">>", ExpressionType.RightShift, p);
p += 10;
dict.Add("+", ExpressionType.AddChecked, p);
dict.Add("-", ExpressionType.SubtractChecked, p);
p += 10;
dict.Add("*", ExpressionType.MultiplyChecked, p);
dict.Add("/", ExpressionType.Divide, p);
dict.Add("%", ExpressionType.Modulo, p);
dict.Add("**", ExpressionType.Power, p);
p += 10;
dict.Add("??", ExpressionType.Coalesce, p);
dict.Add("?", ExpressionType.Conditional, p);
return(dict);
}//method