static void Designator(out DesType des)
{
string name;
int indexType;
Ident(out name);
Entry entry = Table.Find(name);
if (!entry.declared)
{
SemError("undeclared identifier");
}
des = new DesType(entry);
if (entry.kind == Kinds.Var)
{
CodeGen.LoadAddress(entry);
}
if (la.kind == lbrack_Sym)
{
Get();
if (IsArray(des.type))
{
des.type--;
}
else
{
SemError("unexpected subscript");
}
if (des.entry.kind != Kinds.Var)
{
SemError("unexpected subscript");
}
CodeGen.Dereference();
Expression(out indexType);
if (!IsArith(indexType))
{
SemError("invalid subscript type");
}
CodeGen.Index();
Expect(rbrack_Sym);
}
}
static void OneVar(StackFrame frame, int type)
{
int expType;
Entry var = new Entry();
Ident(out var.name);
var.kind = Kinds.Var;
var.type = type;
var.offset = frame.size;
frame.size++;
if (la.kind == equal_Sym)
{
AssignOp();
CodeGen.LoadAddress(var);
Expression(out expType);
if (!Assignable(var.type, expType))
{
SemError("incompatible types in assignment");
}
CodeGen.Assign(var.type);
}
Table.Insert(var);
}