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re PR other/9813 (misplaced paragraph in Constructing Calls node) 

PR doc-bug/9813
	* doc/extend.texi: Move misplaced paragraph about underscores in
	variables in macros.

From-SVN: r64664
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Volker Reichelt 2003-03-21 15:02:35 +00:00 committed by Volker Reichelt
parent 4db3896a69
commit 28eea88733
2 changed files with 19 additions and 13 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2003-03-21 Volker Reichelt <reichelt@igpm.rwth-aachen.de>
PR doc-bug/9813
* doc/extend.texi: Move misplaced paragraph about underscores in
variables in macros.
2003-03-21 Eric Botcazou <ebotcazou@libertysurf.fr>
Richard Henderson <rth@redhat.com>

26
gcc/doc/extend.texi
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@ -843,19 +843,6 @@ the containing function. You should specify, for @var{result}, a value
returned by @code{__builtin_apply}.
@end deftypefn
@cindex underscores in variables in macros
@cindex @samp{_} in variables in macros
@cindex local variables in macros
@cindex variables, local, in macros
@cindex macros, local variables in
The reason for using names that start with underscores for the local
variables is to avoid conflicts with variable names that occur within the
expressions that are substituted for @code{a} and @code{b}. Eventually we
hope to design a new form of declaration syntax that allows you to declare
variables whose scopes start only after their initializers; this will be a
more reliable way to prevent such conflicts.
@node Typeof
@section Referring to a Type with @code{typeof}
@findex typeof
@ -906,6 +893,19 @@ arithmetic type and evaluates each of its arguments exactly once:
_a > _b ? _a : _b; @})
@end example
@cindex underscores in variables in macros
@cindex @samp{_} in variables in macros
@cindex local variables in macros
@cindex variables, local, in macros
@cindex macros, local variables in
The reason for using names that start with underscores for the local
variables is to avoid conflicts with variable names that occur within the
expressions that are substituted for @code{a} and @code{b}. Eventually we
hope to design a new form of declaration syntax that allows you to declare
variables whose scopes start only after their initializers; this will be a
more reliable way to prevent such conflicts.
@noindent
Some more examples of the use of @code{typeof}: