public void RegisterPunctuation(params string[] symbols)
{
foreach (string symbol in symbols)
{
SymbolTerminal term = SymbolTerminal.GetSymbol(symbol);
term.SetOption(TermOptions.IsPunctuation);
}
}
}//method
public void RegisterBracePair(string openBrace, string closeBrace)
{
SymbolTerminal openS = SymbolTerminal.GetSymbol(openBrace);
SymbolTerminal closeS = SymbolTerminal.GetSymbol(closeBrace);
openS.SetOption(TermOptions.IsOpenBrace);
openS.IsPairFor = closeS;
closeS.SetOption(TermOptions.IsCloseBrace);
closeS.IsPairFor = openS;
}
public void RegisterOperators(int precedence, Associativity associativity, params string[] opSymbols)
{
foreach (string op in opSymbols)
{
SymbolTerminal opSymbol = SymbolTerminal.GetSymbol(op);
opSymbol.SetOption(TermOptions.IsOperator, true);
opSymbol.Precedence = precedence;
opSymbol.Associativity = associativity;
}
}//method
public static SymbolTerminal GetSymbol(string symbol, string name)
{
SymbolTerminal term;
if (_symbols.TryGetValue(symbol, out term))
{
//rename symbol if name is provided explicitly (different from symbol itself)
if (name != symbol && term.Name != name)
{
term.Name = name;
}
return(term);
}
string.Intern(symbol);
term = new SymbolTerminal(symbol, name);
term.SetOption(TermOptions.IsGrammarSymbol, true);
_symbols[symbol] = term;
return(term);
}