|
static private CheckType ( |
||
| p | ||
| t | PrecType | |
| d | int | |
| return | int | |
public Precedence(Precedence.PrecType t, int p, Precedence next)
{
if (Precedence.CheckType(next, t, 0) != 0)
{
Console.WriteLine("redeclaration of precedence");
}
this.m_next = next;
this.m_type = t;
this.m_prec = p;
}
public static int Check(CSymbol s, Production p, int d)
{
if (s.m_prec == null)
{
return(0);
}
int num1 = Precedence.CheckType(s.m_prec, Precedence.PrecType.after, d + 1);
int num2 = Precedence.CheckType(s.m_prec, Precedence.PrecType.left, d + 1);
if (num1 > num2)
{
return(num1 - p.m_prec);
}
return(num2 - p.m_prec);
}
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;
}
}