Re: 'eval' macro expansion

[Gary V. Vaughan]

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Anupama Lath wrote:
| I have an expression like this in my input.
| The m4 macroprocessor throws an error if there are spaces before the
| opening/closing parantheses.
| eval ( 12| ( 72-1 ) , 16 )
|      ^                        ^
| Is this a bug in gnu m4 1.4.

~From the manual:

Macro invocation
================

Macro invocations has one of the forms

~     name

which is a macro invocation without any arguments, or

~     name(arg1, arg2, ..., argN)

which is a macro invocation with N arguments.  Macros can have any
number of arguments.  All arguments are strings, but different macros
might interpret the arguments in different ways.

~   The opening parenthesis *must* follow the NAME directly, with no
spaces in between.  If it does not, the macro is called with no
arguments at all.


futhermore:

Quoting macro arguments
=======================

~   Each argument has leading unquoted whitespace removed.  Within each
argument, all unquoted parentheses must match.


Thus you are passing a radix of `16 ' (only leading unquoted whitespace is
removed), which is not a number!

HTH,
        Gary.
- --
Gary V. Vaughan      ())_.  address@hidden,gnu.org}
Research Scientist   ( '/   http://www.oranda.demon.co.uk
GNU Hacker           / )=   http://www.gnu.org/software/libtool
Technical Author   `(_~)_   http://sources.redhat.com/autobook
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