[Solved]How to change the sub expression of QRegularExpression to lowercase or uppercase?

stereomatching

I want to change the following string from lower case to upper case

string : 5am_006_01_05
regex : (5am)(\d+)
replace : \2\U\1
expected output : 006_5AM_01_05
true output : 006_\U5am_01_05

@QString name("5am_006_01_05");
name.replace(QRegularExpression{"(5am)(\d+)"}, "\2\U\1");@

Do I miss anything?

Rondog

I don't know if '\U' is supported in the output string.

The replacement string is created using captured data '\1' '\2' ... in a way similar to how '%1' '%2' ... would be used with .arg(...). The second argument is not a regular expression but a string.

Maybe some method like this might work (didn't try it)

@
name.replace(QRegular[removed]"reg-exp",QString("%1").arg(QString("\1").toUpper()));
@

stereomatching

[quote author="Rondog" date="1422812141"]I don't know if '\U' is supported in the output string.

The replacement string is created using captured data '\1' '\2' ... in a way similar to how '%1' '%2' ... would be used with .arg(...). The second argument is not a regular expression but a string.

Maybe some method like this might work (didn't try it)
[/quote]

Thanks, but looks like it cannot work

@QString name("5am_006_01_05");
name.replace(QRegularExpression{"(5am)_(\d+)"},
QString("%1").arg(QString("\1").toUpper()));
qDebug()<<name;@

actual result : "5am_01_05"

SGaist

Hi,

@name = name.replace(QRegular[removed]"(\d+am)(\d+)"), QString("\2\1")).toUpper();@

should do what you need

stereomatching

[quote author="SGaist" date="1423169881"]Hi,

@name = name.replace(QRegular[removed]"(\d+am)(\d+)"), QString("\2\1")).toUpper();@

should do what you need[/quote]

Thanks, but this solution would change the whole words into uppercase

Example :

@QString name{"5am_006_01_05_hhi"};
name = name.replace(QRegularExpression{"(\d+am)(\d+)"},
QString("\2\1")).toUpper();
qDebug()<<name;@

The output will become "006_5AM_01_05_HHI"
but the desired result is "006_5AM_01_05_hhi" if \Ucan works

SGaist

That's the kind of detail that's good to know.
\U is not implemented

@
QString name("5am_006_01_05_hi_hi");
QRegularExpression rx("(\d+am_)(\d+_)(.*)");
QRegularExpressionMatch match = rx.match(name);
name = match.captured(2) + match.captured(1).toUpper() + match.captured(3);
@

stereomatching

[quote author="SGaist" date="1423349356"]That's the kind of detail that's good to know.
\U is not implemented

@
QString name("5am_006_01_05_hi_hi");
QRegularExpression rx("(\d+am_)(\d+_)(.*)");
QRegularExpressionMatch match = rx.match(name);
name = match.captured(2) + match.captured(1).toUpper() + match.captured(3);
@[/quote]

Thanks, this solution works. Since \U is not implemented yet, I could use it as a temporary solution.

PS : check out boost regex, looks like they haven't implemented \U either