[Issue 17406] New: int var = 10; write(--var,' ',var^^2); //output: 9 100 //NOT: 9 81

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17406

          Issue ID: 17406
           Summary: int var = 10; write(--var,' ',var^^2); //output: 9 100
                    //NOT: 9 81
           Product: D
           Version: D2
          Hardware: x86_64
               URL: http://dlang.org/
                OS: Mac OS X
            Status: NEW
          Severity: trivial
          Priority: P3
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: fordlangcomments at gmail.com

import std.stdio;

void main() {

    int num = 10, whatisit; 
    /*
    in the following code, ^^ does not work as intended, 
    num^^2 is displayed as num not decremented or incremented:
    */
    write(--num,' ',num*num,' ',num^^2,'\n'); //ouput: 9 81 100 //NOT: 9 81 81
    write(++num,' ',num*num,' ',num^^2); //ouput: 10 100 81 //NOT: 10 100 100

    /*
    as long as num is not incremented or decremented in write() or writeln() 
    ^^ works as intended:
    */                                            
    write('\n',num*num,' ',num^^2); //output: 100 100    

    /*                                
    when num is incremented or decremented and num^^2 is assigned,
    ^^ works as intended:    
    */
    write('\n',--num,' ',num*num,' ',whatisit = num^^2); //ouput: 9 81 81
    write("\n",++num,' ',num*num,' ',num^^=2,'\n');    //output: 10 100 100
}//DMD64 D Compiler v2.074.0

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