void Back_Assign(out NBase res) {
res = null; NBase left; NBase expr;
Back_AssignLeft(out left);
Expect(65);
Expr(out expr);
res = new NAssign((NIdentBase)left, expr);
}
void Assign_Expr(out NBase res)
{
res = null; NBase left = null; NBase expr = null;
if (TokenExists(0, "="))
{
Expr(out left);
Expect(6);
Expr(out expr);
res = new NAssign(left, expr);
}
else if (StartOf(1))
{
Expr(out res);
}
else
{
SynErr(75);
}
}