(m4.info.gz) Quoting Arguments
Info Catalog
(m4.info.gz) Macro Arguments
(m4.info.gz) Macros
(m4.info.gz) Macro expansion
3.4 On Quoting Arguments to macros
==================================
Each argument has leading unquoted whitespace removed. Within each
argument, all unquoted parentheses must match. For example, if FOO is
a macro,
foo(() (`(') `(')
is a macro call, with one argument, whose value is `() (() ('. Commas
separate arguments, except when they occur inside quotes, comments, or
unquoted parentheses, Pseudo Arguments, for examples.
It is common practice to quote all arguments to macros, unless you
are sure you want the arguments expanded. Thus, in the above example
with the parentheses, the `right' way to do it is like this:
foo(`() (() (')
It is, however, in certain cases necessary or convenient to leave out
quotes for some arguments, and there is nothing wrong in doing it. It
just makes life a bit harder, if you are not careful. For consistency,
this manual follows the rule of thumb that each layer of parentheses
introduces another layer of single quoting, except when showing the
consequences of quoting rules. This is done even when the quoted string
cannot be a macro, such as with integers when you have not changed the
syntax via `changeword' ( Changeword).
Info Catalog
(m4.info.gz) Macro Arguments
(m4.info.gz) Macros
(m4.info.gz) Macro expansion
automatically generated byinfo2html