Why are there two nested curly braces without any statement in-between?

StackOverflow https://stackoverflow.com/questions/4819619

  •  26-10-2019
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Question

The code given below is the code generated by MOC in Qt.

const QMetaObject MainWindow::staticMetaObject = { { &QMainWindow::staticMetaObject, qt_meta_stringdata_MainWindow, qt_meta_data_MainWindow, 0 } };

Why is there two continuous curly braces without anything statement in-between? Also, what does the statement mean? Just comma separated variable means anything?

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Solution

I think it is initializing a list (external braces) of structure (internal braces.)

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