Re: Non-declared Variables

Peter Flass <Peter_Flass@Yahoo.com>
26 Oct 2006 00:28:58 -0400

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From: Peter Flass <Peter_Flass@Yahoo.com>
Newsgroups: comp.compilers
Date: 26 Oct 2006 00:28:58 -0400
Organization: Road Runner
References: 06-10-064 06-10-098
Keywords: design
Posted-Date: 26 Oct 2006 00:28:58 EDT

gnorik@gmail.com wrote:
> I don't think that it is a good idea when language definition allows
> you to use variables without declaration.
> First of all, it leads to bugs which is rather hard to find.


I would expect the compiler to issue a message for this, unless
undeclared variables are the norm for this language, as in Rexx. PL/I,
for example, has language-specified defaults and default rules, but all
compilers I know of also warn.


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