public object VisitClassStmt(Stmt.ClassStmt stmt)
{
var enclosingClass = _currentClass;
_currentClass = ClassType.CLASS;
Declare(stmt.Name);
Define(stmt.Name);
if (stmt.Superclass != null && stmt.Name.Lexeme.Equals(stmt.Superclass.Name.Lexeme))
{
Lox.Error(stmt.Superclass.Name, "A class cannot inherit from itself.");
}
if (stmt.Superclass != null)
{
_currentClass = ClassType.SUBCLASS;
Resolve(stmt.Superclass);
}
if (stmt.Superclass != null)
{
BeginScope();
Scopes.Peek()["super"] = true;
}
BeginScope();
Scopes.Peek()["this"] = true;
foreach (var method in stmt.Methods)
{
var declaration = FunctionType.METHOD;
if (method.Name.Lexeme.Equals("init"))
{
declaration = FunctionType.INITIALIZER;
}
ResolveFunction(method, declaration);
}
EndScope();
if (stmt.Superclass != null)
{
EndScope();
}
_currentClass = enclosingClass;
return(null);
}
public string VisitClassStmt(Stmt.ClassStmt stmt)
{
var builder = new StringBuilder();
builder.Append($"(class {stmt.Name.Lexeme}");
if (stmt.Superclass != null)
{
builder.Append($" < {Print(stmt.Superclass)}");
}
foreach (var method in stmt.Methods)
{
builder.Append($" {Print(method)}");
}
builder.Append(")");
return(builder.ToString());
}