public object Call(Interpreter interpreter, List <object> arguments) { LoxEnvironment environment = new LoxEnvironment(closure); for (int i = 0; i < declaration.Params.Count; i++) { environment.Define(declaration.Params[i].Lexeme, arguments[i]); } try { interpreter.ExecuteBlock(declaration.Body, environment); } catch (ReturnException returnValue) { if (isInitializer) { return(closure.GetAt(0, "this")); } return(returnValue.Value); } if (isInitializer) { return(closure.GetAt(0, "this")); } return(null); }
public LoxFunction Bind(LoxInstance instance) { LoxEnvironment environment = new LoxEnvironment(closure); environment.Define("this", instance); return(new LoxFunction(declaration, environment, isInitializer)); }
public LoxEnvironment Ancestor(int distance) { LoxEnvironment environment = this; for (int i = 0; i < distance; i++) { environment = environment.Enclosing; } return(environment); }
public void ExecuteBlock(List <Stmt> statements, LoxEnvironment environment) { LoxEnvironment previous = this.environment; try { this.environment = environment; foreach (Stmt statement in statements) { Execute(statement); } } finally { this.environment = previous; } }
public object VisitClassStmt(Class stmt) { object superclass = null; if (stmt.Superclass != null) { superclass = Evaluate(stmt.Superclass); if (!(superclass is LoxClass)) { throw new RuntimeException(stmt.Superclass.Name, "Superclass must be a class."); } } environment.Define(stmt.Name.Lexeme, null); if (stmt.Superclass != null) { environment = new LoxEnvironment(environment); environment.Define("super", superclass); } Dictionary <string, LoxFunction> methods = new Dictionary <string, LoxFunction>(); foreach (Function method in stmt.Methods) { LoxFunction function = new LoxFunction(method, environment, method.Name.Lexeme.Equals("init")); methods.Add(method.Name.Lexeme, function); } LoxClass @class = new LoxClass(stmt.Name.Lexeme, (LoxClass)superclass, methods); if (superclass != null) { environment = environment.Enclosing; } environment.Assign(stmt.Name, @class); return(null); }
public LoxFunction(Function declaration, LoxEnvironment closure, bool isInitializer) { this.isInitializer = isInitializer; this.closure = closure; this.declaration = declaration; }
public Interpreter() { Globals.Define("clock", new Clock()); Globals.Define("power", new Power()); environment = Globals; }
public LoxEnvironment(LoxEnvironment enclosing) { this.Enclosing = enclosing; }
public LoxEnvironment() { Enclosing = null; }