SymbolTable.cs

namespace JackCompiler;

class SymbolTable
{
    public Dictionary<string, Symbol> Table = [];

    // Indexers!
    public Symbol this[string i] => Table[i];

    public bool TryGetEntry(string name, out Symbol entry)
    {
        if (Table.TryGetValue(name, out _))
        {
            entry = Table[name];
            return true;
        }
        entry = new();
        return false;
    }

    public readonly List<int> _indexes = [0,0,0,0,0,0];

    public void Reset() { 
        Table.Clear();
        for (int i = 0; i < _indexes.Count; i++)
        {
            _indexes[i] = 0;
        }
    }

    public void Define(string name, string type, Kind kind)
    {
        int indexKind = (int)kind;
        Symbol symbol = new Symbol(type, kind, _indexes[indexKind]);
        _indexes[indexKind]++;
        Table.Add(name, symbol);
    }
    public int VarCount(Kind kind) => _indexes[(int)kind];
    public int IndexOf(string name) => Table[name].Index;
    public Kind KindOf(string name) => Table[name].Kind;
    public string TypeOf(string name) => Table[name].Type;
}