|qmake:||QT += core|
This class is useful when you have a sequence of bytes that you want to repeatedly match against some byte arrays (perhaps in a loop), or when you want to search for the same sequence of bytes multiple times in the same byte array. Using a matcher object and indexIn() is faster than matching a plain QByteArray with QByteArray::indexOf(), in particular if repeated matching takes place.
Unlike QByteArrayMatcher, this class calculates the internal representation at compile-time, if your compiler supports C++14-level
constexpr (C++11 is not sufficient), so it can even benefit if you are doing one-off byte array matches.
Create the QStaticByteArrayMatcher by calling qMakeStaticByteArrayMatcher(), passing it the C string literal you want to search for. Store the return value of that function in a
static const auto variable, so you don't need to pass the
N template parameter explicitly:
static const auto matcher = qMakeStaticByteArrayMatcher("needle");
Since this class is designed to do all the up-front calculations at compile-time, it does not offer a setPattern() method.
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