void Expr(out Expression e)
{
Expression rhs; e = null;
if (StartOf(2))
{
LogOrExp(out e);
if (la.kind == 19)
{
Get();
Expr(out rhs);
e = new Assignment(e.MakeLvalue(), rhs);
}
}
else if (la.kind == 20)
{
Get();
Expr(out e);
e = new UnOp(Operator.WriteI, e);
}
else
{
SynErr(37);
}
}
void UnaryExp(out Expression e)
{
Expression e1; e = null;
switch (la.kind)
{
case 1:
case 2:
case 3: {
PostFixExp(out e);
break;
}
case 29: {
Get();
UnaryExp(out e);
break;
}
case 30: {
Get();
UnaryExp(out e1);
e = new UnOp(Operator.Neg, e1);
break;
}
case 32: {
Get();
UnaryExp(out e1);
e = new UnOp(Operator.Not, e1);
break;
}
case 18: {
Get();
UnaryExp(out e1);
e = new DereferenceAccess(e1);
break;
}
case 33: {
Get();
UnaryExp(out e1);
e = new AddressOf(e1.MakeLvalue());
break;
}
default: SynErr(39); break;
}
}
