Using the 'samples/cpp_tokens' example preprocessor with the following code:
    #define true   1
    #define false  0
gives the following error:

test.C(1): error: ill formed preprocessor directive: #define

Preprocessing the same file with 'cpp' give no error. If any of the two lines in the
file is removed the other line will cause an error. I guess the error occurs because
'true' is not an T_IDENTIFIER, but a T_TRUE. Could you imagine a clean fix
to this issue?

Regards.
Andreas