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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: Labels
Date: Sat, 15 Aug 2015 19:13:31 -0700
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Bartc <bc@freeuk.com> writes:
[...]
> But even knowing a starter symbol is a typedef name, then with 'T(' you 
> might still be a long way from knowing if this is a simple variable 
> declaration, or the start of a 1000-line function definition.

At block scope, function definitions are not permitted.  At file scope,
a function definition cannot start with 'T('; it requires at least a
type name and an identifier.  At least that's the case since C99 -- and
on the other hand, some (most?) compilers use a C90-compatible grammar
that permits implicit-int definitions and diagnoses them separately.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"