public object visitClassStmt(Stmt.Class stmt) { ClassType enclosingClass = currentClass; currentClass = ClassType.CLASS; declare(stmt.name); define(stmt.name); if (stmt.superclass != null && stmt.name.lexeme.Equals(stmt.superclass.name.lexeme)) { Jingle.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[scopes.Count - 1].Add("super", true); } beginScope(); scopes[scopes.Count - 1].Add("this", true); foreach (Stmt.Function method in stmt.methods) { FunctionType 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 object visitClassStmt(Stmt.Class stmt) { object superclass = null; if (stmt.superclass != null) { superclass = evaluate(stmt.superclass); if (!(superclass is JingleClass)) { throw new RuntimeError(stmt.superclass.name, "Superclass must be a class."); } } environment.define(stmt.name.lexeme, null); if (stmt.superclass != null) { environment = new Environment(environment); environment.define("super", superclass); } Dictionary <string, JingleFunc> methods = new Dictionary <string, JingleFunc>(); foreach (Stmt.Function method in stmt.methods) { JingleFunc function = new JingleFunc(method, environment, method.name.lexeme.Equals("init")); methods.Add(method.name.lexeme, function); } JingleClass jnclass = new JingleClass(stmt.name.lexeme, (JingleClass)superclass, methods); if (superclass != null) { environment = environment.enclosing; } environment.assign(stmt.name, jnclass); return(null); }