public object VisitClassStmt(Stmt.Class stmt)
{
_environment.Define(stmt.Name.Lexeme, null);
object superclass = null;
if (stmt.Superclass != null)
{
superclass = Evaluate(stmt.Superclass);
if (!(superclass is LoxClass))
{
throw new RuntimeError(stmt.Name, "Superclass must be a class.");
}
_environment = new EnvironmentScope(_environment);
_environment.Define("super", superclass);
}
var methods = new Dictionary <string, LoxFunction>();
foreach (var method in stmt.Methods)
{
var function = new LoxFunction(method, _environment, method.Name.Lexeme == "init");
methods[method.Name.Lexeme] = function;
}
var klass = new LoxClass(stmt.Name.Lexeme, (LoxClass)superclass, methods);
if (superclass != null)
{
_environment = _environment.Enclosing;
}
_environment.Assign(stmt.Name, klass);
return(null);
}
public string VisitClassStmt(Stmt.Class stmt)
{
var builder = new StringBuilder();
builder.Append("(class " + stmt.Name.Lexeme);
//> Inheritance omit
if (stmt.Superclass != null)
{
builder.Append(" < " + Print(stmt.Superclass));
}
//< Inheritance omit
foreach (var method in stmt.Methods)
{
builder.Append(" " + Print(method));
}
builder.Append(")");
return(builder.ToString());
}
public object VisitClassStmt(Stmt.Class stmt)
{
Declare(stmt.Name);
Define(stmt.Name);
var enclosingClass = _currentClass;
_currentClass = ClassType.CLASS;
if (stmt.Superclass != null)
{
_currentClass = ClassType.SUBCLASS;
Resolve(stmt.Superclass);
BeginScope();
_scopes.Peek()["super"] = true;
}
BeginScope();
_scopes.Peek()["this"] = true;
foreach (var method in stmt.Methods)
{
var declaration = FunctionType.METHOD;
if (method.Name.Lexeme == "init")
{
declaration = FunctionType.INITIALIZER;
}
ResolveFunction(method, declaration);
}
EndScope();
if (stmt.Superclass != null)
{
EndScope();
}
_currentClass = enclosingClass;
return(null);
}