public object VisitVariableExpr(Expr.VariableExpr expr)
{
if (Scopes.Any())
{
var scope = Scopes.Peek();
if (scope.ContainsKey(expr.Name.Lexeme) && !scope[expr.Name.Lexeme])
{
Lox.Error(expr.Name, "Cannot read local variable in its own initializer.");
}
}
ResolveLocal(expr, expr.Name);
return(null);
}
private Stmt ClassDeclaration()
{
var name = Consume(IDENTIFIER, "Expect class name.");
Expr.VariableExpr superclass = null;
if (Match(LESS))
{
Consume(IDENTIFIER, "Expect superclass name.");
superclass = new Expr.VariableExpr(Previous());
}
Consume(LEFT_BRACE, "Expect '{' before class body.");
var methods = new List <Stmt.FunctionStmt>();
while (!Check(RIGHT_BRACE) && !IsAtEnd())
{
methods.Add(Function("method"));
}
Consume(RIGHT_BRACE, "Expect '}' after class body.");
return(new Stmt.ClassStmt(name, superclass, methods));
}
public ClassStmt(Token name, Expr.VariableExpr superclass, List <FunctionStmt> methods)
{
Name = name;
Superclass = superclass;
Methods = methods;
}
public string VisitVariableExpr(Expr.VariableExpr expr)
{
return(expr.Name.Lexeme);
}
