Re: undefined compound chaining behavior

[Richard Crozier]

On 12/06/2014 16:48, Hossein Sajjadi wrote:
> >

> I talk about Standard and do not target any compiler.
> In c++11 the expression i=++i+1 is well defined but gcc 4.9 throws
> warning and a+=a+=4 is undefined but gcc throws no warning

Jordi's point is that just because you type a+=a+=4 at the Octave 
prompt, does not mean this expression is what is ever evaluated in C++ 
code. Octave does not write a little C++ file containing the a+=a+=4 
expression and then compile and run it after all.

The expression is broken down by the interpreter code and evaluated in 
whatever way the interpreter was written to do it.

Richard


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