Boo.Lang.Compiler.CompilerParameters.OnStrictMode C# (CSharp) Method

        protected virtual void OnStrictMode()
        {
            _defaultTypeVisibility = TypeMemberModifiers.Private;
            _defaultMethodVisibility = TypeMemberModifiers.Private;
            _defaultPropertyVisibility = TypeMemberModifiers.Private;
            _defaultEventVisibility = TypeMemberModifiers.Private;
            _defaultFieldVisibility = TypeMemberModifiers.Private;

            EnableWarning(CompilerWarningFactory.Codes.ImplicitReturn);
            EnableWarning(CompilerWarningFactory.Codes.VisibleMemberDoesNotDeclareTypeExplicitely);

            //by default strict mode forbids implicit downcasts
            //disable warning so we get only the regular incompatible type error
            DisableWarning(CompilerWarningFactory.Codes.ImplicitDowncast);
        }