Sometimes it isn't possible to decide at the time the external C class is written whether a routine will be implemented in the C code with a macro. This presents a portability problem, because the writer of the external class can't know ahead of time whether the routine will be obtained by linking or by a header file. Such petulant cases can be dealt with by the call 'SYS::inlined_C'. The argument must be a string literal, and is placed directly into the generated code, except that identifiers following '#' that correspond to locals and arguments are translated into the appropriate C names.