lines 29-37 of file: example/cplusplus/a_double_unary_op_xam.cpp {xrst_begin a_double_unary_op_xam.cpp} C++: a_double Unary Plus and Minus: Example and Test #################################################### {xrst_literal // BEGIN SOURCE // END SOURCE } {xrst_end a_double_unary_op_xam.cpp}