public int CompareTo(SymbolString other)
{
if (other == null)
{
return(1);
}
if (other.Count < Count)
{
return(1);
}
if (other.Count > Count)
{
return(-1);
}
for (int i = 0; i < this.Count; i++)
{
var cp = this[i].CompareTo(other[i]);
if (cp != 0)
{
return(cp);
}
}
return(0);
}
public static SymbolString Concat(SymbolString symbolString, TerminalSymbol symbol)
{
List <Symbol> symbols = new List <Symbol>(symbolString);
if (symbol != null)
{
symbols.Add(symbol);
}
return(new SymbolString(symbols));
}
public HashSet <TerminalSymbol> GetNextLookaheads(GrammarProductionDatabase db)
{
if (ParsingPoint == (Production.Body.Count - 1))
{
return new HashSet <TerminalSymbol> {
Lookahead
}
}
;
return(SymbolString.Concat(Production.Body.Range(ParsingPoint + 1), Lookahead).FirstSet(db));
}
}
public bool Equals(SymbolString other)
{
if (other == null)
{
return(false);
}
if (this.Count != other.Count)
{
return(false);
}
for (int i = 0; i < other.Count; i++)
{
if (this[i] != other[i])
{
return(false);
}
}
return(true);
}
public GrammarProduction(NonterminalSymbol head, SymbolString body)
{
this.Head = head;
this.Body = body;
}
