Mamoru Tasaka
mtasa****@ioa*****
2008年 2月 22日 (金) 15:07:25 JST
田坂です
Hiroyuki Ikezoe wrote, at 02/22/2008 02:23 PM +9:00:
>>> nsIHelperAppLauncherDialog::Show()が
>>>
>>> Show(nsIHelperAppLauncher *aLauncher, nsISupports *aContext, PRUint32
>>> aReason)
>>>
>>> こうなってるのに、
>>>
>>> | nsIHelperAppLauncherDialog *p;
>>> | p->Show (nsnull, nsnull, -1);
>>>
>>> このコードが正常にコンパイル通っちゃってます。
>
> こっちが32ビットの話でした。
これは分かりました。g++の場合-Wconversionではなく-Wsign-conversionで
ないといけないようです。
------------------------------------------------------------------------------------------
-Wconversion
Warn for implicit conversions that may alter a value. This includes conversions between real and integer, like "abs (x)" when
"x" is "double"; conversions between signed and unsigned, like "unsigned ui = -1"; and conversions to smaller types, like
"sqrtf (M_PI)". Do not warn for explicit casts like "abs ((int) x)" and "ui = (unsigned) -1", or if the value is not changed
by the conversion like in "abs (2.0)". Warnings about conversions between signed and unsigned integers can be disabled by
using -Wno-sign-conversion.
For C++, also warn for conversions between "NULL" and non-pointer types; confusing overload resolution for user-defined con-
versions; and conversions that will never use a type conversion operator: conversions to "void", the same type, a base class
or a reference to them. Warnings about conversions between signed and unsigned integers are disabled by default in C++ unless
-Wsign-conversion is explicitly enabled.
----------------------------------------------------------------------------------------
gcc43から変わったのかもしれません。