public void Visit(VarList node)
{
foreach (var n in node)
{
//Visit((dynamic) n);
var variableName = n.AnchorToken.Lexeme;
if (currentFunc == "")
{
if (visitCount > 0)
{
return;
}
if (GlobalSymbols.Contains(variableName))
{
throw new SemanticError(
"Duplicated variable: " + variableName,
n.AnchorToken);
}
else
{
GlobalSymbols[variableName] = 0;
}
}
else
{
if (Functions.getLocalFT(currentFunc).Contains(variableName))
{
throw new SemanticError(
"Duplicated variable: " + variableName,
n.AnchorToken);
}
else
{
Functions.getLocalFT(currentFunc).addVar(variableName, "L", -1);
}
}
}
return;
}
public virtual void DefineCommSymbol(string name, int size, int align)
{
if (Pass > 1)
{
return;
}
if (LocalSymTable.ContainsKey(name))
{
return;
}
if (size <= 0)
{
size = 1;
}
// round up alignment to a power of 2
int al = 1;
while (al < align)
{
al <<= 1;
}
align = al;
SyEntry newsym;
if (!GlobalSymbols.TryGetValue(name, out newsym))
{
newsym = new SyEntry(name, 0, size, align);
GlobalSymbols[name] = newsym;
}
else if (newsym.Kind == SymbolKind.CommSymbol)
{
// combine new size and alignment with old values
newsym.Size = size;
newsym.Align = align;
} // else ignore the .comm definition because it's
// already defined as a normal label
LocalSymTable[name] = newsym;
}
public SyEntry LookupSymbol(string name, out bool isNewUnknown)
{
isNewUnknown = false;
if (Char.IsDigit(name[0]))
{
return(LookupNumericLabel(name));
}
SyEntry sy = null;
if (LocalSymTable.TryGetValue(name, out sy))
{
return(sy);
}
if (GlobalSymbols.TryGetValue(name, out sy))
{
return(sy);
}
if (!UndefLocals.Contains(name))
{
UndefLocals.Add(name);
isNewUnknown = true;
}
return(null);
}
