public object visitVariableExpr(Expr.Variable expr)
{
bool initialized;
if (scopes.Count > 0 && scopes.Peek().TryGetValue(expr.Name.Lexeme, out initialized) && initialized == false)
{
Lox.error(expr.Name, "Cannot read local variable in it's own initializer");
}
resolveLocal(expr, expr.Name);
return(null);
}
private Stmt classDelaration()
{
Token name = consume(TokenType.IDENTIFIER, "Expect class name");
Expr.Variable superClass = null;
if (match(TokenType.LESS))
{
consume(TokenType.IDENTIFIER, "Expect superclass name.");
superClass = new Expr.Variable(previous());
}
consume(TokenType.LEFT_BRACE, "Expect '{' before class body");
var methods = new List <Stmt.Function>();
while (!check(TokenType.RIGHT_BRACE) && !isAtEnd())
{
methods.Add(function("method"));
}
consume(TokenType.RIGHT_BRACE, "Expect '}' after class body");
return(new Stmt.Class(name, superClass, methods));
}
public string visitVariableExpr(Expr.Variable expr)
{
return(parenthesize("var", expr));
}
public Class(Token name, Expr.Variable superClass, List <Stmt.Function> methods)
{
Name = name;
SuperClass = superClass;
Methods = methods;
}
public object visitVariableExpr(Expr.Variable expr)
{
return(lookUpVariable(expr.Name, expr));
}