LUpdate not adding entry to .ts file

[Perdrix]

This fails:

strText = QCoreApplication::translate("LiveEngine", "Image %1 registered: %n star(s) detected - FWHM = %2 - Score = %3\n",
	"IDS_LOG_REGISTERRESULTS", 
        static_cast<int>(lfi.m_vStars.size()))
	.arg(QString::fromWCharArray(strName)
        .arg(lfi.m_fFWHM, 0, 'f', 2).arg(lfi.m_fOverallQuality, 0, 'f', 2));

This works:

strText = QCoreApplication::translate("LiveEngine", "Image %1 registered: %2 star(s) detected - FWHM = %3 - Score = %4\n",
	"IDS_LOG_REGISTERRESULTS")
	.arg(QString::fromWCharArray(strName)
	.arg(lfi.m_vStars.size())
	.arg(lfi.m_fFWHM, 0, 'f', 2).arg(lfi.m_fOverallQuality, 0, 'f', 2));

Puzzled

[Paul Colby]

Hi @Perdrix

.arg(QString::fromWCharArray(strName)
.arg(lfi.m_fFWHM, 0, 'f', 2).arg(lfi.m_fOverallQuality, 0, 'f', 2));

I think that very last ) should be on the previous line.

You have:

strText = QCoreApplication::translate(
    "LiveEngine",
    "Image %1 registered: %n star(s) detected - FWHM = %2 - Score = %3\n",
    "IDS_LOG_REGISTERRESULTS", 
    static_cast<int>(lfi.m_vStars.size())
)
.arg(
     QString::fromWCharArray(strName)
        .arg(lfi.m_fFWHM, 0, 'f', 2)
        .arg(lfi.m_fOverallQuality, 0, 'f', 2)
);

I suspect you meant:

strText = QCoreApplication::translate(
    "LiveEngine",
    "Image %1 registered: %n star(s) detected - FWHM = %2 - Score = %3\n",
    "IDS_LOG_REGISTERRESULTS", 
    static_cast<int>(lfi.m_vStars.size())
)
.arg(QString::fromWCharArray(strName)) ///< Extra `)` here.
.arg(lfi.m_fFWHM, 0, 'f', 2)
.arg(lfi.m_fOverallQuality, 0, 'f', 2); ///< One less `)` here.

Cheers.

[JonB]

@Paul-Colby
That's the trouble with any offering like Qt's with %num substitutions not supported/checked by the language (C++) :(

With Qt QString::arg() you get a run-time warning if you supplied too many arguments for the %ns and nothing at all if you supplied too few. gcc at least gives you compile-time warnings for both too many and too few if you use printf("%...", ...)-type functions, and my old favourite C# had built-in support in the language for {n} substitutions so could do the same.

[Perdrix]

@Paul-Colby Well darn it! How did I miss that!

BUT after I changed it to

			strText = QCoreApplication::translate(
				"LiveEngine",
				"Image %1 registered: %n star(s) detected - FWHM = %2 - Score = %3\n",
				"IDS_LOG_REGISTERRESULTS",
				static_cast<int>(lfi.m_vStars.size())
			)
				.arg(QString::fromWCharArray(strName))
				.arg(lfi.m_fFWHM, 0, 'f', 2)
				.arg(lfi.m_fOverallQuality, 0, 'f', 2); 

and running lupdate the .ts file still has no entry for that translation :(

[Perdrix]

Can anyone cast some light on this problem - its really quite an issue for me.

[Paul Colby]

@Perdrix said in LUpdate not adding entry to .ts file:

and running lupdate the .ts file still has no entry for that translation :(

Interesting. This looks like a pretty clear lupdate bug to me, where lupdate is failing on the cast of the n argument. For example, this doesn't work for me:

    auto strText = QCoreApplication::translate(
                  "LiveEngine",
                  "Image %1 registered: %n star(s) detected - FWHM = %2 - Score = %3\n",
                  "IDS_LOG_REGISTERRESULTS",
                  static_cast<int>(123) ///< This breaks lupdate?
                  )
                  .arg(QString::fromWCharArray(nullptr))
                  .arg(0.01, 0, 'f', 2)
                  .arg(0.02, 0, 'f', 2);

And this does't work either:

    auto strText = QCoreApplication::translate(
                  "LiveEngine",
                  "Image %1 registered: %n star(s) detected - FWHM = %2 - Score = %3\n",
                  "IDS_LOG_REGISTERRESULTS",
                  (int)123 ///< This breaks lupdate also?
                  )
                  .arg(QString::fromWCharArray(nullptr))
                  .arg(0.01, 0, 'f', 2)
                  .arg(0.02, 0, 'f', 2);

But this works fine (for lupdate ... I wouldn't execute the code itself ;)

    auto strText = QCoreApplication::translate(
                  "LiveEngine",
                  "Image %1 registered: %n star(s) detected - FWHM = %2 - Score = %3\n",
                  "IDS_LOG_REGISTERRESULTS",
                  123
                  )
                  .arg(QString::fromWCharArray(nullptr))
                  .arg(0.01, 0, 'f', 2)
                  .arg(0.02, 0, 'f', 2);

And this works also:

    const int size = 123;
    auto strText = QCoreApplication::translate(
                  "LiveEngine",
                  "Image %1 registered: %n star(s) detected - FWHM = %2 - Score = %3\n",
                  "IDS_LOG_REGISTERRESULTS",
                  size
                  )
                  .arg(QString::fromWCharArray(nullptr))
                  .arg(0.01, 0, 'f', 2)
                  .arg(0.02, 0, 'f', 2);

So I would suggest you convert your lfi.m_vStars.size() to int as a separate statement, and then report this as a bug over at https://bugreports.qt.io/ (or I can report it, if you don't get around to it)

Cheers.