[yul-phaser] AlgorithmRunner: Population autosave

tools/yulPhaser/AlgorithmRunner.cpp

@@ -17,16 +17,50 @@
 
 #include <tools/yulPhaser/AlgorithmRunner.h>
 
+#include <tools/yulPhaser/Exceptions.h>
+
+#include <libsolutil/Assertions.h>
+
+#include <cerrno>
+#include <cstring>
+#include <fstream>
+
 using namespace std;
 using namespace solidity::phaser;
 
 void AlgorithmRunner::run(GeneticAlgorithm& _algorithm)
 {
+	populationAutosave();
+
 	for (size_t round = 0; !m_options.maxRounds.has_value() || round < m_options.maxRounds.value(); ++round)
 	{
 		m_population = _algorithm.runNextRound(m_population);
 
 		m_outputStream << "---------- ROUND " << round + 1 << " ----------" << endl;
 		m_outputStream << m_population;
+
+		populationAutosave();
 	}
 }
+
+void AlgorithmRunner::populationAutosave() const
+{
+	if (!m_options.populationAutosaveFile.has_value())
+		return;
+
+	ofstream outputStream(m_options.populationAutosaveFile.value(), ios::out | ios::trunc);
+	assertThrow(
+		outputStream.is_open(),
+		FileOpenError,
+		"Could not open file '" + m_options.populationAutosaveFile.value() + "': " + strerror(errno)
+	);
+
+	for (auto& individual: m_population.individuals())
+		outputStream << individual.chromosome << endl;
+
+	assertThrow(
+		!outputStream.bad(),
+		FileWriteError,
+		"Error while writing to file '" + m_options.populationAutosaveFile.value() + "': " + strerror(errno)
+	);
+}