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From: | Denis Valois |
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 `(' 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 |
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