public object VisitVariableExpr(Expr.Variable expr)
{
_scopes.TryPeek(out IDictionary <string, bool> peekedDictionary);
bool getValue = false;
peekedDictionary?.TryGetValue(expr.Name.Lexeme, out getValue);
if (_scopes.Count != 0 && getValue == false)
{
Lox.Error(expr.Name, "Cannot read local variable in its own initializer.");
}
ResolveLocal(expr, expr.Name);
return(null);
}
private Stmt ClassDeclaration()
{
Token name = Consume(IDENTIFIER, "Expect class name.");
Expr.Variable superclass = null;
if (Match(LESS))
{
Consume(IDENTIFIER, "Expect superclass name");
superclass = new Expr.Variable(Previous());
}
Consume(LEFT_BRACE, "Expect '{' before class body.");
List <Stmt.Function> methods = new List <Stmt.Function>();
while (!Check(RIGHT_BRACE) && !IsAtEnd())
{
methods.Add(Function("method"));
}
Consume(RIGHT_BRACE, "Expect '}' after class body");
return(new Stmt.Class(name, superclass, methods));
}
public object VisitVariableExpr(Expr.Variable expr)
{
return(LookUpVariable(expr.Name, expr));
}
public Class(Token name, Expr.Variable superclass, IEnumerable <Stmt.Function> methods)
{
this.Name = name;
this.Superclass = superclass;
this.Methods = methods;
}
public string Visit(Expr.Variable expr)
{
throw new NotImplementedException();
}