|Subject:||passing a parenthesis character|
|Date:||Thu, 8 Mar 2018 22:29:58 +0100|
|User-agent:||Mozilla/5.0 (X11; Linux i686; rv:52.0) Gecko/20100101 Thunderbird/52.6.0|
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 `('
this works perfectly with the expected results -1.
example 2: use of a macro
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
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