public TypeVisitor(DemiTasse.symbol.SymbolTable symtab, ClassRec c, MethodRec m)
{
symTable = symtab;
currClass = c;
currMethod = m;
hasReturn = false;
}
public ClassRec(AstId cid)
{
_id = cid;
_parent = null;
_vars = new List<VarRec>();
_methods = new Dictionary<String, MethodRec>();
}
// ***********************************************************
// * constructor -- a symbol table is passed in as a parameter
// ***********************************************************
public TypeVisitor(SymbolTable symtab)
{
symTable = symtab;
currClass = null;
currMethod = null;
hasReturn = false;
}
public IrgenVisitor(SymbolTable symTable_, TypeVisitor tv_)
{
cOne = new IrConst(1);
cZero = new IrConst(0);
cWordSize = new IrName("wSZ");
symTable = symTable_;
tv = tv_;
currClass = null;
currMethod = null;
}
private int GetNumObjVars(ClassRec c)
{
int numVars = 0;
while (null != c)
{
numVars += c.VarCnt();
c = c.Parent();
}
return numVars;
}
private int GetInitStmts(ClassRec c, IrStmtList stmts, IrTemp tmp)
{
ClassRec saveCurrClass;
VarRec v;
int varCnt = 0;
// Get init STMTs from inherited class
if (null != c.Parent())
{
varCnt = GetInitStmts(c.Parent(), stmts, tmp);
}
// Add init STMTs from this class
for (int i = 0; i < c.VarCnt(); i++)
{
v = c.GetClassVarAt(i);
if (null == v.Init())
{
stmts.add(ObjVarInitStmt(tmp, varCnt + i, v.Idx - 1, cZero));
}
else
{
saveCurrClass = currClass;
currClass = c;
IrExp e = v.Init().accept(this);
currClass = saveCurrClass;
stmts.add(ObjVarInitStmt(tmp, varCnt + i, v.Idx - 1, e));
}
}
return varCnt + c.VarCnt();
}
// ClassDecl ---
// Id cid, pid;
// VarDeclList vl;
// MethodDeclList ml;
public IrFuncList visit(AstClassDecl n)
{
currClass = symTable.GetClass(n.cid);
IrFuncList funcs = n.ml.accept(this);
currClass = null;
return funcs;
}
public void LinkParent(ClassRec p)
{
_parent = p;
int start_idx = AncestorVarCnt() + 1;
for (int i = 0; i < _vars.Count; i++)
_vars[i].Idx = (start_idx + i);
}
public MethodRec GetMethod(ClassRec c, AstId mid)
{
MethodRec m;
while (c != null)
{
if ((m = c.GetMethod(mid)) != null)
return m;
c = c.Parent();
}
throw new SymbolException("Method " + mid.s + " not defined");
}
public string UniqueMethodName(ClassRec c, AstId mid)
{
MethodRec m;
while (c != null)
{
if ((m = c.GetMethod(mid)) != null)
return c.Id().s + "_" + mid.s;
c = c.Parent();
}
throw new SymbolException("Method " + mid.s + " not defined");
}
public VarRec GetVar(ClassRec c, AstId vid)
{
VarRec v;
while (c != null)
{
if ((v = c.GetClassVar(vid)) != null)
return v;
c = c.Parent();
}
throw new SymbolException("Var " + vid.s + " not defined");
}
public VarRec GetVar(ClassRec c, MethodRec m, AstId vid)
{
VarRec v;
if (m != null)
{
if ((v = m.GetLocal(vid)) != null)
return v;
if ((v = m.GetParam(vid)) != null)
return v;
}
return GetVar(c, vid);
}
public void visit(AstClassDecl n) {
currClass = symTable.getClass(n.cid);
//n.vl.accept(this);
n.ml.accept(this);
currClass = null;
}
private MethodRec currMethod; // the current method scope
#endregion Fields
#region Constructors
public SymbolVisitor()
{
symTable = new symbol.SymbolTable();
currClass = null;
currMethod = null;
}
public void setClass(ClassRec c)
{
currClass = c;
}
