From 54ad9358758df536710bb54e4f2d606eb7795436 Mon Sep 17 00:00:00 2001
From: Changkun Ou <hi@changkun.us>
Date: Tue, 16 Jul 2019 09:26:31 +0200
Subject: [PATCH] see #2: code updates

---
 code/1/1.1.c.and.cpp                    | 1 +
 code/1/Makefile                         | 1 +
 code/1/foo.c                            | 1 +
 code/1/foo.h                            | 1 +
 code/10/Makefile                        | 9 ++++++++-
 code/2/2.01.nullptr.cpp                 | 1 +
 code/2/2.02.constexpr.cpp               | 1 +
 code/2/2.03.if.switch.cpp               | 4 ++--
 code/2/2.04.initializer.list.cpp        | 1 +
 code/2/2.05.structured.binding.cpp      | 1 +
 code/2/2.06.auto.cpp                    | 1 +
 code/2/2.07.decltype.cpp                | 1 +
 code/2/2.08.tail.return.type.cpp        | 1 +
 code/2/2.09.decltype.auto.cpp           | 1 +
 code/2/2.10.if.constexpr.cpp            | 1 +
 code/2/2.11.for.loop.cpp                | 1 +
 code/2/2.12.external.template.cpp       | 1 +
 code/2/2.13.alias.template.cpp          | 1 +
 code/2/2.14.default.template.param.cpp  | 1 +
 code/2/2.15.variadic.template.param.cpp | 1 +
 code/2/2.16.fold.expression.cpp         | 1 +
 code/2/2.18.non.type.template.auto.cpp  | 1 +
 code/2/Makefile                         | 7 +++++++
 code/2/todo/2.7.cpp                     | 1 +
 code/2/todo/2.8.cpp                     | 1 +
 code/3/3.1.cpp                          | 1 +
 code/3/3.2.cpp                          | 1 +
 code/3/3.3.cpp                          | 1 +
 code/3/3.4.cpp                          | 1 +
 code/3/3.5.cpp                          | 1 +
 code/3/3.6.cpp                          | 1 +
 code/4/4.1.cpp                          | 1 +
 code/4/4.2.cpp                          | 1 +
 code/4/4.3.cpp                          | 1 +
 code/7/7.1.cpp                          | 1 +
 code/7/7.2.cpp                          | 1 +
 code/9/9.1.noexcept.cpp                 | 1 +
 code/9/9.2.literals.cpp                 | 1 +
 code/9/Makefile                         | 7 +++++++
 exercises/2/fold.expresion.cpp          | 1 +
 exercises/2/structured.binding.cpp      | 1 +
 41 files changed, 61 insertions(+), 3 deletions(-)

diff --git a/code/1/1.1.c.and.cpp b/code/1/1.1.c.and.cpp
index 837626e..825c2e8 100644
--- a/code/1/1.1.c.and.cpp
+++ b/code/1/1.1.c.and.cpp
@@ -5,6 +5,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include "foo.h"
diff --git a/code/1/Makefile b/code/1/Makefile
index ed50295..09cde53 100644
--- a/code/1/Makefile
+++ b/code/1/Makefile
@@ -5,6 +5,7 @@
 # modern cpp tutorial
 #
 # created by changkun at changkun.de
+# https://github.com/changkun/modern-cpp-tutorial
 #
 
 C = gcc
diff --git a/code/1/foo.c b/code/1/foo.c
index 273bdd1..14b5050 100644
--- a/code/1/foo.c
+++ b/code/1/foo.c
@@ -5,6 +5,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include "foo.h"
diff --git a/code/1/foo.h b/code/1/foo.h
index f10bf6e..9ce74b8 100644
--- a/code/1/foo.h
+++ b/code/1/foo.h
@@ -5,6 +5,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #ifdef __cplusplus
diff --git a/code/10/Makefile b/code/10/Makefile
index 4477d7c..642b9bc 100644
--- a/code/10/Makefile
+++ b/code/10/Makefile
@@ -1,7 +1,14 @@
+#
+# modern cpp tutorial
+#
+# created by changkun at changkun.de
+# https://github.com/changkun/modern-cpp-tutorial
+#
+
 all: $(patsubst %.cpp, %.out, $(wildcard *.cpp))
 
 %.out: %.cpp Makefile
-	clang++ $< -o $@ -std=c++2a -Xclang -fconcepts-ts -pedantic
+	clang++ $< -o $@ -std=c++2a -pedantic
 
 clean:
 	rm *.out
\ No newline at end of file
diff --git a/code/2/2.01.nullptr.cpp b/code/2/2.01.nullptr.cpp
index c0959f5..0b59157 100644
--- a/code/2/2.01.nullptr.cpp
+++ b/code/2/2.01.nullptr.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/2.02.constexpr.cpp b/code/2/2.02.constexpr.cpp
index 91fb0c0..7934ca6 100644
--- a/code/2/2.02.constexpr.cpp
+++ b/code/2/2.02.constexpr.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/2.03.if.switch.cpp b/code/2/2.03.if.switch.cpp
index 5651781..e596de1 100644
--- a/code/2/2.03.if.switch.cpp
+++ b/code/2/2.03.if.switch.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
@@ -13,13 +14,12 @@
 int main() {
     std::vector<int> vec = {1, 2, 3, 4};
 
-    // before c++17, can be simplefied by using `auto`
+    // after c++17, can be simplefied by using `auto`
     const std::vector<int>::iterator itr = std::find(vec.begin(), vec.end(), 2);
     if (itr != vec.end()) {
         *itr = 3;
     }
 
-    // after c++17, can be simplefied by using `auto`
     if (const std::vector<int>::iterator itr = std::find(vec.begin(), vec.end(), 3);
         itr != vec.end()) {
         *itr = 4;
diff --git a/code/2/2.04.initializer.list.cpp b/code/2/2.04.initializer.list.cpp
index 9f2dbe0..8caeeb9 100644
--- a/code/2/2.04.initializer.list.cpp
+++ b/code/2/2.04.initializer.list.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/2.05.structured.binding.cpp b/code/2/2.05.structured.binding.cpp
index e7f5ab1..48963f3 100644
--- a/code/2/2.05.structured.binding.cpp
+++ b/code/2/2.05.structured.binding.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/2.06.auto.cpp b/code/2/2.06.auto.cpp
index bf01d67..c9eaeb5 100644
--- a/code/2/2.06.auto.cpp
+++ b/code/2/2.06.auto.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <initializer_list>
diff --git a/code/2/2.07.decltype.cpp b/code/2/2.07.decltype.cpp
index 6bac87a..7d48616 100644
--- a/code/2/2.07.decltype.cpp
+++ b/code/2/2.07.decltype.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/2.08.tail.return.type.cpp b/code/2/2.08.tail.return.type.cpp
index 414d4cd..c05796a 100644
--- a/code/2/2.08.tail.return.type.cpp
+++ b/code/2/2.08.tail.return.type.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/2.09.decltype.auto.cpp b/code/2/2.09.decltype.auto.cpp
index 5445fca..d48586a 100644
--- a/code/2/2.09.decltype.auto.cpp
+++ b/code/2/2.09.decltype.auto.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 template<int i>
diff --git a/code/2/2.10.if.constexpr.cpp b/code/2/2.10.if.constexpr.cpp
index 97f6dc7..9042f2e 100644
--- a/code/2/2.10.if.constexpr.cpp
+++ b/code/2/2.10.if.constexpr.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/2.11.for.loop.cpp b/code/2/2.11.for.loop.cpp
index fd0d7bf..a843c40 100644
--- a/code/2/2.11.for.loop.cpp
+++ b/code/2/2.11.for.loop.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/2.12.external.template.cpp b/code/2/2.12.external.template.cpp
index 12262a7..ad31ff9 100644
--- a/code/2/2.12.external.template.cpp
+++ b/code/2/2.12.external.template.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/2.13.alias.template.cpp b/code/2/2.13.alias.template.cpp
index 2932b6f..a5355d4 100644
--- a/code/2/2.13.alias.template.cpp
+++ b/code/2/2.13.alias.template.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/2.14.default.template.param.cpp b/code/2/2.14.default.template.param.cpp
index 9809742..9351649 100644
--- a/code/2/2.14.default.template.param.cpp
+++ b/code/2/2.14.default.template.param.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/2.15.variadic.template.param.cpp b/code/2/2.15.variadic.template.param.cpp
index 849bacb..e43619f 100644
--- a/code/2/2.15.variadic.template.param.cpp
+++ b/code/2/2.15.variadic.template.param.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/2.16.fold.expression.cpp b/code/2/2.16.fold.expression.cpp
index 9926d8e..cdfbde5 100644
--- a/code/2/2.16.fold.expression.cpp
+++ b/code/2/2.16.fold.expression.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/2.18.non.type.template.auto.cpp b/code/2/2.18.non.type.template.auto.cpp
index e6d47fa..b2a1d43 100644
--- a/code/2/2.18.non.type.template.auto.cpp
+++ b/code/2/2.18.non.type.template.auto.cpp
@@ -4,6 +4,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/code/2/Makefile b/code/2/Makefile
index fe333ed..642b9bc 100644
--- a/code/2/Makefile
+++ b/code/2/Makefile
@@ -1,3 +1,10 @@
+#
+# modern cpp tutorial
+#
+# created by changkun at changkun.de
+# https://github.com/changkun/modern-cpp-tutorial
+#
+
 all: $(patsubst %.cpp, %.out, $(wildcard *.cpp))
 
 %.out: %.cpp Makefile
diff --git a/code/2/todo/2.7.cpp b/code/2/todo/2.7.cpp
index 1d01166..9a636d6 100644
--- a/code/2/todo/2.7.cpp
+++ b/code/2/todo/2.7.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // 面向对象增强
 
diff --git a/code/2/todo/2.8.cpp b/code/2/todo/2.8.cpp
index fe9b736..2e87f57 100644
--- a/code/2/todo/2.8.cpp
+++ b/code/2/todo/2.8.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // 强类型枚举
 
diff --git a/code/3/3.1.cpp b/code/3/3.1.cpp
index 4110ee1..7ddf0bf 100644
--- a/code/3/3.1.cpp
+++ b/code/3/3.1.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // lambda expression
 
diff --git a/code/3/3.2.cpp b/code/3/3.2.cpp
index d213bd4..dd48ab1 100644
--- a/code/3/3.2.cpp
+++ b/code/3/3.2.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // std::function std::bind
 
diff --git a/code/3/3.3.cpp b/code/3/3.3.cpp
index f34a30a..27727f7 100644
--- a/code/3/3.3.cpp
+++ b/code/3/3.3.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // 右值引用 rvalue reference
 
diff --git a/code/3/3.4.cpp b/code/3/3.4.cpp
index ca0e97a..6abeeee 100644
--- a/code/3/3.4.cpp
+++ b/code/3/3.4.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // 移动语义
 
diff --git a/code/3/3.5.cpp b/code/3/3.5.cpp
index 2e38e23..76564c7 100644
--- a/code/3/3.5.cpp
+++ b/code/3/3.5.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // 移动语义
 
diff --git a/code/3/3.6.cpp b/code/3/3.6.cpp
index 3249e17..1f2d789 100644
--- a/code/3/3.6.cpp
+++ b/code/3/3.6.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // 完美转发
 
diff --git a/code/4/4.1.cpp b/code/4/4.1.cpp
index f879639..93304c8 100644
--- a/code/4/4.1.cpp
+++ b/code/4/4.1.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // std::array
 
diff --git a/code/4/4.2.cpp b/code/4/4.2.cpp
index bfed726..c1694c7 100644
--- a/code/4/4.2.cpp
+++ b/code/4/4.2.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // 无序容器
 
diff --git a/code/4/4.3.cpp b/code/4/4.3.cpp
index 5a88271..828aeae 100644
--- a/code/4/4.3.cpp
+++ b/code/4/4.3.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // std::tuple 及其操作
 
diff --git a/code/7/7.1.cpp b/code/7/7.1.cpp
index b673d8c..1e69a98 100644
--- a/code/7/7.1.cpp
+++ b/code/7/7.1.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // 线程支持库
 
diff --git a/code/7/7.2.cpp b/code/7/7.2.cpp
index 99b6cdb..33e3bf4 100644
--- a/code/7/7.2.cpp
+++ b/code/7/7.2.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // 生产者消费者模型
 
diff --git a/code/9/9.1.noexcept.cpp b/code/9/9.1.noexcept.cpp
index c5b799a..c77f885 100644
--- a/code/9/9.1.noexcept.cpp
+++ b/code/9/9.1.noexcept.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // noexcept
 
diff --git a/code/9/9.2.literals.cpp b/code/9/9.2.literals.cpp
index 3dee477..3109dfb 100644
--- a/code/9/9.2.literals.cpp
+++ b/code/9/9.2.literals.cpp
@@ -3,6 +3,7 @@
 // modern c++ tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 // literals
 
diff --git a/code/9/Makefile b/code/9/Makefile
index fe333ed..642b9bc 100644
--- a/code/9/Makefile
+++ b/code/9/Makefile
@@ -1,3 +1,10 @@
+#
+# modern cpp tutorial
+#
+# created by changkun at changkun.de
+# https://github.com/changkun/modern-cpp-tutorial
+#
+
 all: $(patsubst %.cpp, %.out, $(wildcard *.cpp))
 
 %.out: %.cpp Makefile
diff --git a/exercises/2/fold.expresion.cpp b/exercises/2/fold.expresion.cpp
index d42e336..cf98ecc 100644
--- a/exercises/2/fold.expresion.cpp
+++ b/exercises/2/fold.expresion.cpp
@@ -5,6 +5,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>
diff --git a/exercises/2/structured.binding.cpp b/exercises/2/structured.binding.cpp
index 465577f..8afebbc 100644
--- a/exercises/2/structured.binding.cpp
+++ b/exercises/2/structured.binding.cpp
@@ -5,6 +5,7 @@
 // modern cpp tutorial
 //
 // created by changkun at changkun.de
+// https://github.com/changkun/modern-cpp-tutorial
 //
 
 #include <iostream>