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Re: undefined compound chaining behavior
From: |
Hossein Sajjadi |
Subject: |
Re: undefined compound chaining behavior |
Date: |
Tue, 10 Jun 2014 08:09:40 +0330 |
accoring to the manual:
expr1 op= expr2
is evaluated as
expr1 = (expr1) op (expr2)
so the expression
a=1;
a+=(a+=4);
should be equivalent to
a=1;
a=a+(a=a+4);
but the firt expression results 10 and second results 6
in expression a+=(a+=4) this procedure should be followed if order of
evaluations to be left to right:
first "a" in LHS is evaluated , so its value (1) will be stored to be
used by the rest of the expression
In RHS "a" is evaluated and its value (1) is sums with 4 reults 5
5 sums with "a" in LHS then result will be 6
but Octave's behavior is similar to c++ that takes the address of LHS
variable first and then evaluate RHS expression
- Re: undefined compound chaining behavior, Rik, 2014/06/06
- Re: undefined compound chaining behavior, Hossein Sajjadi, 2014/06/06
- Re: undefined compound chaining behavior, Daniel J Sebald, 2014/06/09
- Re: undefined compound chaining behavior, Hossein Sajjadi, 2014/06/09
- Re: undefined compound chaining behavior, Hossein Sajjadi, 2014/06/09
- Re: undefined compound chaining behavior, Mike Miller, 2014/06/09
- Re: undefined compound chaining behavior, Hossein Sajjadi, 2014/06/09
- Re: undefined compound chaining behavior, Mike Miller, 2014/06/09
- Re: undefined compound chaining behavior,
Hossein Sajjadi <=
- Re: undefined compound chaining behavior, Ben Abbott, 2014/06/10
- Re: undefined compound chaining behavior, Hossein Sajjadi, 2014/06/10
- Re: undefined compound chaining behavior, Mike Miller, 2014/06/10
- Re: undefined compound chaining behavior, Hossein Sajjadi, 2014/06/10
- Re: undefined compound chaining behavior, Mike Miller, 2014/06/10
- Re: undefined compound chaining behavior, Hossein Sajjadi, 2014/06/10
- Re: undefined compound chaining behavior, Michael Goffioul, 2014/06/10
- Re: undefined compound chaining behavior, Hossein Sajjadi, 2014/06/10
- Re: undefined compound chaining behavior, Mike Miller, 2014/06/10
- Re: undefined compound chaining behavior, Hossein Sajjadi, 2014/06/10