|
public static Check ( |
||
| s | ||
| p | ||
| d | int | |
| Результат | int | |
public static int Check(Precedence p, Precedence.PrecType t, int d)
{
if (p == null)
{
return(0);
}
if (p.m_type == t)
{
return(p.m_prec);
}
return(Precedence.Check(p.m_next, t, d + 1));
}
private static int CheckType(Precedence p, Precedence.PrecType t, int d)
{
if (p == null)
{
return(0);
}
if (p.m_type == t || p.m_type <= Precedence.PrecType.nonassoc && t <= Precedence.PrecType.nonassoc)
{
return(p.m_prec);
}
return(Precedence.Check(p.m_next, t, d + 1));
}
public static void Check(Production p)
{
int count = p.m_rhs.Count;
while (count > 1 && ((SYMBOL)p.m_rhs[count - 1]).IsAction())
{
--count;
}
switch (count)
{
case 2:
if ((CSymbol)p.m_rhs[0] == p.m_lhs)
{
int num = Precedence.Check(((CSymbol)p.m_rhs[1]).m_prec, Precedence.PrecType.after, 0);
if (num == 0)
{
break;
}
p.m_prec = num;
break;
}
if ((CSymbol)p.m_rhs[1] != p.m_lhs)
{
break;
}
int num1 = Precedence.Check(((CSymbol)p.m_rhs[0]).m_prec, Precedence.PrecType.before, 0);
if (num1 == 0)
{
break;
}
p.m_prec = num1;
break;
case 3:
int num2 = Precedence.CheckType(((CSymbol)p.m_rhs[1]).m_prec, Precedence.PrecType.left, 0);
if (num2 == 0 || (CSymbol)p.m_rhs[2] != p.m_lhs)
{
break;
}
p.m_prec = num2;
break;
}
}
public Precedence.PrecType ShiftPrecedence(Production prod, ParseState ps)
{
if (prod == null || !prod.m_lhs.m_follow.Contains(this))
{
return(Precedence.PrecType.left);
}
if (this.m_prec == null)
{
Console.WriteLine("Shift/Reduce conflict {0} on reduction {1} in state {2}", (object)this.yytext, (object)prod.m_pno, (object)ps.m_state);
return(Precedence.PrecType.left);
}
if (this.m_prec.m_type == Precedence.PrecType.nonassoc)
{
return(Precedence.PrecType.nonassoc);
}
int num = Precedence.Check(this, prod, 0);
if (num == 0)
{
return(Precedence.Check(this.m_prec, Precedence.PrecType.right, 0) != 0 ? Precedence.PrecType.left : Precedence.PrecType.right);
}
return(num > 0 ? Precedence.PrecType.left : Precedence.PrecType.right);
}
