Hello m4 wizards,
My problem is passing a single parenthesis as a macro argument. I do
not understand m4 behavior; this tells me that I miss some fundamentals.
example 1: notice the litteral `('
index(`abcdef', `(')
this works perfectly with the expected results -1.
example 2: use of a macro
define(`c', `(')
index(`abcdef', c)
Here we have "ERROR: end of file in argument list". This is because the
macro c is expanded before index so the parenthesis are unbalanced.
Other approaches such as
builtin(`index', `abcdef', `c')
are either expanding to a wrong result or generate a run-time error. I
simply do not see how to pass a macro defined with a parenthesis as
argument.
Thanks in advance for help.
--
Denis Valois/
PGP KeyID 0xB5418E1A
