From 89eb36095d63e6046e902cb97968c45d9939675f Mon Sep 17 00:00:00 2001
From: Wu Tao <wutao163.com@163.com>
Date: Tue, 28 May 2019 14:04:27 +0800
Subject: [PATCH] use c++14 mode for compilation (#257)

---
 .travis.yml                   |  9 +++++----
 bin/dsn.cmake                 | 18 ++++++++++--------
 src/core/core/fail_point.cpp  | 10 +++++-----
 src/core/tests/CMakeLists.txt |  2 +-
 4 files changed, 21 insertions(+), 18 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index f829556457..2489de0577 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,8 +14,12 @@ cache:
 
 addons:
     apt:
+        update: true
+        sources:
+            - ubuntu-toolchain-r-test
         packages:
             - clang-format-3.9
+            - g++-5
 
 before_install:
     - wget https://raw.githubusercontent.com/xiaomi/pegasus-common/master/build-depends.tar.gz
@@ -25,9 +29,6 @@ before_install:
     - ls | xargs sudo dpkg -i --force-depends
     - cd ..
 
-install:
-    # - ./run.sh format
-
 before_script:
     - cd thirdparty
     - wget https://raw.githubusercontent.com/xiaomi/pegasus-common/master/pegasus-thirdparty-prebuild.tar.gz
@@ -37,7 +38,7 @@ before_script:
     - ulimit -c unlimited -S
 
 script:
-    - ./run.sh test --skip_thirdparty --check --disable_gperf
+    - ./run.sh test --compiler "gcc-5,g++-5" --skip_thirdparty --check --disable_gperf
 
 after_script:
     - ./run.sh stop_zk
diff --git a/bin/dsn.cmake b/bin/dsn.cmake
index 9f4cf51c08..bd0008b1aa 100644
--- a/bin/dsn.cmake
+++ b/bin/dsn.cmake
@@ -209,10 +209,18 @@ function(dsn_setup_compiler_flags)
     # We want access to the PRI* print format macros.
     add_definitions(-D__STDC_FORMAT_MACROS)
 
+    include(CheckCXXCompilerFlag)
+    CHECK_CXX_COMPILER_FLAG("-std=c++14" COMPILER_SUPPORTS_CXX14)
+    if(COMPILER_SUPPORTS_CXX14)
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14" CACHE STRING "" FORCE)
+    else()
+        message(FATAL_ERROR "You need a compiler with C++14 support.")
+    endif()
+
     # -fno-omit-frame-pointer
     #   use frame pointers to allow simple stack frame walking for backtraces.
     #   This has a small perf hit but worth it for the ability to profile in production
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++1y -fno-omit-frame-pointer" CACHE STRING "" FORCE)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-omit-frame-pointer" CACHE STRING "" FORCE)
 
     #  -Wall: Enable all warnings.
     add_compile_options(-Wall)
@@ -336,14 +344,8 @@ function(dsn_common_setup)
 
     set(BUILD_SHARED_LIBS OFF)
 
-    include(CheckCXXCompilerFlag)
-    CHECK_CXX_COMPILER_FLAG("-std=c++1y" COMPILER_SUPPORTS_CXX1Y)
-    if(NOT ${COMPILER_SUPPORTS_CXX1Y})
-        message(FATAL_ERROR "You need a compiler with C++1y support.")
-    endif()
-
     dsn_setup_system_libs()
     dsn_setup_compiler_flags()
     dsn_setup_include_path()
     dsn_setup_link_path()
-endfunction(dsn_common_setup)
\ No newline at end of file
+endfunction(dsn_common_setup)
diff --git a/src/core/core/fail_point.cpp b/src/core/core/fail_point.cpp
index b7698b63df..d80976df1b 100644
--- a/src/core/core/fail_point.cpp
+++ b/src/core/core/fail_point.cpp
@@ -18,7 +18,7 @@
 #include "fail_point_impl.h"
 
 #include <dsn/c/api_layer1.h>
-#include <boost/regex.hpp>
+#include <regex>
 #include <dsn/utility/rand.h>
 
 namespace dsn {
@@ -57,13 +57,13 @@ bool fail_point::parse_from_string(string_view action)
     _max_cnt = -1;
     _freq = 100;
 
-    boost::regex regex(R"((\d+\%)?(\d+\*)?(\w+)(\((.*)\))?)");
-    boost::smatch match;
+    std::regex regex(R"((\d+\%)?(\d+\*)?(\w+)(\((.*)\))?)");
+    std::smatch match;
 
     std::string tmp(action.data(), action.length());
-    if (boost::regex_match(tmp, match, regex)) {
+    if (std::regex_match(tmp, match, regex)) {
         if (match.size() == 6) {
-            boost::ssub_match sub_match = match[1];
+            std::ssub_match sub_match = match[1];
             if (!sub_match.str().empty()) {
                 sscanf(sub_match.str().data(), "%d%%", &_freq);
             }
diff --git a/src/core/tests/CMakeLists.txt b/src/core/tests/CMakeLists.txt
index 33b784e3d8..2635e1c947 100644
--- a/src/core/tests/CMakeLists.txt
+++ b/src/core/tests/CMakeLists.txt
@@ -10,7 +10,7 @@ set(MY_PROJ_INC_PATH
     ../core ../tools/common ../tools/simulator ../tools/hpc ../tools/nfs 
     )
     
-set(MY_BOOST_PACKAGES system filesystem regex)
+set(MY_BOOST_PACKAGES system filesystem)
 
 set(MY_PROJ_LIBS gtest
                  dsn_runtime