• d-bugmail puremagic.com (55/55) Jun 17 2020 https://issues.dlang.org/show_bug.cgi?id=20944

d-bugmail puremagic.com writes:

https://issues.dlang.org/show_bug.cgi?id=20944

          Issue ID: 20944
           Summary: proper typedef refInt = ref int
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: mingwu gmail.com

https://forum.dlang.org/thread/hiolsiqiitnfddlaxuxc forum.dlang.org

----------------
import std.stdio;

alias refInt = ref int;

void f(refInt i) {
  i = 456;
}

void main() {
  int i = 123;
  writeln(i);
  f(i);
  writeln(i);
}
----------------

$ $DMD/windows/bin64/rdmd.exe reft.d
123
123

$ $LDC/bin/rdmd  reft.d
123
123

I would consider it a bug, *even* C++ can handle this better :-)  i.e. no
surprise to the programmer.

cat reft.cpp
----------------------
#include <stdio.h>

typedef int& refInt;

void f(refInt i) {
  i = 456;
}

int main() {
  int i = 123;
  printf("%d\n", i);
  f(i);
  printf("%d\n", i);
}
----------------------

$ make reft
g++     reft.cpp   -o reft


$ ./reft
123
456

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