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MathGroup Archive 2006

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Re: Context

  • To: mathgroup at smc.vnet.net
  • Subject: [mg70975] Re: Context
  • From: "Philipp" <Philipp.M.O at gmail.com>
  • Date: Fri, 3 Nov 2006 01:39:25 -0500 (EST)
  • References: <eicnon$g4g$1@smc.vnet.net>

I'm sorry to be a bearer of bad tidings, but that's exactly what the
manual states in Built-in Functions -> Begin,

"Begin thus affects the PARSING of input expressions."

Sorry
Philipp

P.S. You need a back quote at the end of the context string in
Begin["x`"].

Cheers.

dh wrote:

> Hello,
>
> consider:
>
> fun[x_]:=( Begin[x];
>
>        Print[t];
>
>        End[];
>
>        );
>
> according to the manual one would think that the variable t in context x
>
> is printed. However, this is wrong! What is printed is Global`t.
>
> Therefore, the context to which a symbol belongs is determined during
>
> parsing and NOT execution.
>
> Can anybode give more insight and strict rules for this quirck?
> 
> Daniel


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