From ab91276fca437bf76d87b8d08a1672971d1c53cd Mon Sep 17 00:00:00 2001
From: Bert Peters <bert@bertptrs.nl>
Date: Thu, 12 Sep 2019 14:59:24 +0200
Subject: [PATCH] Replace std::filesystem with boost::filesystem.

Somehow, travis still doesn't support the right one.
---
 .travis.yml                   | 3 ++-
 2019/CMakeLists.txt           | 4 ++--
 2019/tests/test_solutions.cpp | 5 ++---
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 99b9dda..cd0dd7a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,10 +10,11 @@ before_script:
     - cd 2019
 
 # CMake build
-script: cmake . && make && ./test_solutions
+script: cmake . && make && make test
 
 addons:
     apt:
         packages:
+            - libboost-filesystem-dev
             - libboost-program-options-dev
             - libboost-test-dev
diff --git a/2019/CMakeLists.txt b/2019/CMakeLists.txt
index 2c30c6f..d8c7ad6 100644
--- a/2019/CMakeLists.txt
+++ b/2019/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.12)
 
 project(aoc2019)
 
-find_package(Boost REQUIRED COMPONENTS program_options unit_test_framework)
+find_package(Boost REQUIRED COMPONENTS program_options unit_test_framework filesystem)
 
 add_library(AoCSolutions src/solutions.hpp src/solutions.cpp src/day01.cpp)
 target_compile_features(AoCSolutions PUBLIC cxx_std_17)
@@ -13,7 +13,7 @@ target_link_libraries(runner AoCSolutions Boost::program_options)
 
 add_executable(test_solutions tests/test_solutions.cpp)
 target_compile_features(test_solutions PUBLIC cxx_std_17)
-target_link_libraries(test_solutions AoCSolutions Boost::unit_test_framework)
+target_link_libraries(test_solutions AoCSolutions Boost::unit_test_framework Boost::filesystem)
 target_include_directories(test_solutions PRIVATE "${CMAKE_SOURCE_DIR}/src")
 
 enable_testing()
diff --git a/2019/tests/test_solutions.cpp b/2019/tests/test_solutions.cpp
index 464e10b..81e24fa 100644
--- a/2019/tests/test_solutions.cpp
+++ b/2019/tests/test_solutions.cpp
@@ -1,16 +1,15 @@
 #define BOOST_TEST_MODULE solutions_tests
 
-#include <filesystem>
 #include <regex>
 #include <string>
-#include <tuple>
+#include <boost/filesystem.hpp>
 #include <boost/test/included/unit_test.hpp>
 #include <boost/test/data/test_case.hpp>
 #include "solutions.hpp"
 
 std::vector<std::string> get_samples() {
     std::vector<std::string> samples;
-    for (auto entry : std::filesystem::directory_iterator("./samples")) {
+    for (const auto &entry : boost::filesystem::directory_iterator("./samples")) {
         if (entry.path().filename().extension() == ".in") {
             samples.push_back(entry.path().string());
         }