[Oberon] A C++ version of the Lola-2 compiler and an Oberon to C++ compiler

[Chris Burrows]

> -----Original Message-----
> From: Oberon [mailto:oberon-bounces at lists.inf.ethz.ch] On Behalf Of
> rochus.keller at bluewin.ch
> Sent: Thursday, 18 April 2019 9:43 PM
> To: oberon at lists.inf.ethz.ch
> Subject: Re: [Oberon] A C++ version of the Lola-2 compiler and an
> Oberon to C++ compiler
> 
> @ Chris Burrows
> 
> Thank you very much for the implementation; it's obviously much more
> elegant than my quick approach. There is also this proposal by J rg
> Straube:
>
> int _MOD(int a, b) { int m = a%b; if (a<0) m += b; return m; } 
> int _MOD(int a, b) { return a<0 ? a%b+b : a%b ; } 
> int _MOD(int a, b) { return a & (b-1); }
> 

None of those gives the same results as either your quick approach or my implementation, e.g. 

a := -21
b := 7 

The result of a MOD b should be 0. Unless I'm mistaken the first two return 7 and the last returns 2.

Regards,
Chris

Chris Burrows
CFB Software
http://www.astrobe.com