From e1bf7314f060816aa158e9a55b235c4defbae6c0 Mon Sep 17 00:00:00 2001
From: Jeff Long <willcode4@gmail.com>
Date: Mon, 11 Sep 2023 09:52:26 -0400
Subject: [PATCH] qtgui: Matrix Sink - use QVector initializer supported by Qt
 5.12

Signed-off-by: Jeff Long <willcode4@gmail.com>
---
 gr-qtgui/lib/matrix_sink_impl.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gr-qtgui/lib/matrix_sink_impl.cc b/gr-qtgui/lib/matrix_sink_impl.cc
index 7ef474e2303..f1050ba9732 100644
--- a/gr-qtgui/lib/matrix_sink_impl.cc
+++ b/gr-qtgui/lib/matrix_sink_impl.cc
@@ -116,8 +116,8 @@ int matrix_sink_impl::work(int noutput_items,
     auto in = static_cast<const input_type*>(input_items[0]);
 
     for (int k = 0; k < noutput_items; k++) {
-        std::vector<input_type> a(in + k * d_vlen, in + (k + 1) * d_vlen);
-        QVector<double> qvec(a.begin(), a.end());
+        QVector<double> qvec(d_vlen);
+        std::copy(in + k * d_vlen, in + (k + 1) * d_vlen, qvec.begin());
         emit d_signal->data_ready(qvec);
     }