Added rvalue reference (xvalue) constructor version for C++ QrSegment, updated code to use it.

cpp/QrSegment.cpp

@@ -23,6 +23,7 @@
 
 #include <climits>
 #include <cstring>
+#include <utility>
 #include "QrSegment.hpp"
 
 using std::uint8_t;
@@ -59,7 +60,7 @@ QrSegment QrSegment::makeBytes(const vector<uint8_t> &data) {
 	BitBuffer bb;
 	for (uint8_t b : data)
 		bb.appendBits(b, 8);
-	return QrSegment(Mode::BYTE, (int)data.size(), bb);
+	return QrSegment(Mode::BYTE, (int)data.size(), std::move(bb));
 }
 
 
@@ -82,7 +83,7 @@ QrSegment QrSegment::makeNumeric(const char *digits) {
 	}
 	if (accumCount > 0)  // 1 or 2 digits remaining
 		bb.appendBits(accumData, accumCount * 3 + 1);
-	return QrSegment(Mode::NUMERIC, charCount, bb);
+	return QrSegment(Mode::NUMERIC, charCount, std::move(bb));
 }
 
 
@@ -105,7 +106,7 @@ QrSegment QrSegment::makeAlphanumeric(const char *text) {
 	}
 	if (accumCount > 0)  // 1 character remaining
 		bb.appendBits(accumData, 6);
-	return QrSegment(Mode::ALPHANUMERIC, charCount, bb);
+	return QrSegment(Mode::ALPHANUMERIC, charCount, std::move(bb));
 }
 
 
@@ -139,7 +140,7 @@ QrSegment QrSegment::makeEci(long assignVal) {
 		bb.appendBits(assignVal, 21);
 	} else
 		throw "ECI assignment value out of range";
-	return QrSegment(Mode::ECI, 0, bb);
+	return QrSegment(Mode::ECI, 0, std::move(bb));
 }
 
 
@@ -152,6 +153,15 @@ QrSegment::QrSegment(const Mode &md, int numCh, const std::vector<bool> &dt) :
 }
 
 
+QrSegment::QrSegment(const Mode &md, int numCh, std::vector<bool> &&dt) :
+		mode(md),
+		numChars(numCh),
+		data(std::move(dt)) {
+	if (numCh < 0)
+		throw "Invalid value";
+}
+
+
 int QrSegment::getTotalBits(const vector<QrSegment> &segs, int version) {
 	if (version < 1 || version > 40)
 		throw "Version number out of range";

cpp/QrSegment.hpp

@@ -149,6 +149,12 @@ class QrSegment final {
 	public: QrSegment(const Mode &md, int numCh, const std::vector<bool> &dt);
 	
 	
+	/* 
+	 * Creates a new QR Code data segment with the given parameters and data.
+	 */
+	public: QrSegment(const Mode &md, int numCh, std::vector<bool> &&dt);
+	
+	
 	// Package-private helper function.
 	public: static int getTotalBits(const std::vector<QrSegment> &segs, int version);