public object VisitVariableExpr(Expr.Variable expr)
{
if (scopes.Any() && scopes.Peek().TryGetValue(expr.Name.Lexeme, out var variable) && variable == false)
{
Lox.Error(expr.Name, "Can't read local variable in its own initializer.");
}
ResolveLocal(expr, expr.Name);
return(null);
}
private Stmt ClassDeclaration()
{
var 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.");
var methods = new List <Stmt.Function>();
while (!Check(RIGHT_BRACE) && !IsAtEnd())
{
methods.Add(FunctionDeclaration("method"));
}
Consume(RIGHT_BRACE, "Expect '}' after class body.");
return(new Stmt.Class(name, superclass, methods.ToArray()));
}