Add soultions to second half of exercises in chapter 14.

Author: Jaege

README.md

@@ -132,11 +132,11 @@ This repo is the solutions to exercises in book [_C++ Primer_ (5th Edition)](htt
 
  1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10
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-[1](ch14/14.1.cpp)|[2](ch14/14.2.cpp)|[3](ch14/14.3.cpp)|[4](ch14/14.4.cpp)|[5](ch14/14.5.cpp)|[6](ch14/14.6.cpp)|[7](ch14/14.7.cpp)|[8](ch14/14.8.cpp)|[9](ch14/14.9.cpp)|[10](ch14/14.10.cpp)|
-[11](ch14/14.11.cpp)|[12](ch14/14.12.cpp)|[13](ch14/14.13.cpp)|[14](ch14/14.14.cpp)|[15](ch14/14.15.cpp)|[16](ch14/14.16.cpp)|[17](ch14/14.17.cpp)|[18](ch14/14.18.cpp)|[19](ch14/14.19.cpp)|[20](ch14/14.20.cpp)|
-[21](ch14/14.21.cpp)|[22](ch14/14.22.cpp)|[23](ch14/14.23.cpp)|[24](ch14/14.24.cpp)|[25](ch14/14.25.cpp)|[26](ch14/14.26.cpp)|[27](ch14/14.27.cpp)|[28](ch14/14.28.cpp)|[29](ch14/14.29.cpp)|[30](ch14/14.30.cpp)|
-[31](ch14/14.31.cpp)|[32](ch14/14.32.cpp)|[33](ch14/14.33.cpp)|[34](ch14/14.34.cpp)|[35](ch14/14.35.cpp)|[36](ch14/14.36.cpp)|[37](ch14/14.37.cpp)|[38](ch14/14.38.cpp)|[39](ch14/14.39.cpp)|[40](ch14/14.40.cpp)|
-[41](ch14/14.41.cpp)|[42](ch14/14.42.cpp)|[43](ch14/14.43.cpp)|[44](ch14/14.44.cpp)|[45](ch14/14.45.cpp)|[46](ch14/14.46.cpp)|[47](ch14/14.47.cpp)|[48](ch14/14.48.cpp)|[49](ch14/14.49.cpp)|[50](ch14/14.50.cpp)|
+[1](ch14/14.1.md)|[2](ch14/14.2.cpp)|[3](ch14/14.3.md)|[4](ch14/14.4.md)|[5](ch14/14.5.md)|[6](ch14/14.6.cpp)|[7](ch14/14.7)|[8](ch14/14.8.md)|[9](ch14/14.9.cpp)|[10](ch14/14.10.md)|
+[11](ch14/14.11.md)|[12](ch14/14.12.md)|[13](ch14/14.13.cpp)|[14](ch14/14.14.md)|[15](ch14/14.15.md)|[16](ch14/14.16)|[17](ch14/14.17.md)|[18](ch14/14.18)|[19](ch14/14.19.md)|[20](ch14/14.20.md)|
+[21](ch14/14.21.cpp)|[22](ch14/14.22.cpp)|[23](ch14/14.23)|[24](ch14/14.24.md)|[25](ch14/14.25.md)|[26](ch14/14.26)|[27](ch14/14.27)|[28](ch14/14.28)|[29](ch14/14.29.md)|[30](ch14/14.30)|
+[31](ch14/14.31.md)|[32](ch14/14.32)|[33](ch14/14.33.md)|[34](ch14/14.34.cpp)|[35](ch14/14.35.cpp)|[36](ch14/14.36.md)|[37](ch14/14.37.cpp)|[38](ch14/14.38.cpp)|[39](ch14/14.39.cpp)|[40](ch14/14.40.cpp)|
+[41](ch14/14.41.md)|[42](ch14/14.42.cpp)|[43](ch14/14.43.cpp)|[44](ch14/14.44.cpp)|[45](ch14/14.45.cpp)|[46](ch14/14.46.md)|[47](ch14/14.47.md)|[48](ch14/14.48.md)|[49](ch14/14.49.md)|[50](ch14/14.50.cpp)|
 [51](ch14/14.51.cpp)|[52](ch14/14.52.cpp)|[53](ch14/14.53.cpp)
 
 <!---

ch14/14.27/ConstStrBlobPtr.cpp

@@ -0,0 +1,76 @@
+#include "ConstStrBlobPtr.h"
+#include "StrBlob.h"
+
+ConstStrBlobPtr::ConstStrBlobPtr() : wptr(), curr(0) {}
+ConstStrBlobPtr::ConstStrBlobPtr(const StrBlob &sb, size_type pos)
+    : wptr(sb.data), curr(pos) {}
+
+std::shared_ptr<std::vector<std::string>>
+ConstStrBlobPtr::check(size_type pos, const std::string &msg) const {
+  auto ret = wptr.lock();
+  if (!ret)
+    throw std::runtime_error("unbound ConstStrBlobPtr");
+  if (pos >= ret->size())
+    throw std::out_of_range(msg);
+  return ret;
+}
+
+const std::string &ConstStrBlobPtr::deref() const {
+  auto sp = check(curr, "deference past end of ConstStrBlobPtr");
+  return (*sp)[curr];
+}
+
+//ConstStrBlobPtr &ConstStrBlobPtr::inc() {
+//  check(curr, "increment past end of ConstStrBlobPtr");
+//  ++curr;
+//  return *this;
+//}
+
+ConstStrBlobPtr &ConstStrBlobPtr::operator++() {
+  check(curr, "increment past end of ConstStrBlobPtr");
+  ++curr;
+  return *this;
+}
+
+ConstStrBlobPtr ConstStrBlobPtr::operator++(int) {
+  auto ret = *this;
+  ++*this;
+  return ret;
+}
+
+ConstStrBlobPtr &ConstStrBlobPtr::operator--() {
+  --curr;
+  check(curr, "decrement past begin of ConstStrBlobPtr");
+  return *this;
+}
+
+ConstStrBlobPtr ConstStrBlobPtr::operator--(int) {
+  auto ret = *this;
+  --*this;
+  return ret;
+}
+
+bool operator==(const ConstStrBlobPtr &lhs, const ConstStrBlobPtr &rhs) {
+  // compare identity
+  return lhs.wptr.lock() == rhs.wptr.lock() && lhs.curr == rhs.curr;
+}
+
+bool operator!=(const ConstStrBlobPtr &lhs, const ConstStrBlobPtr &rhs) {
+  return !(lhs == rhs);
+}
+
+bool operator<(const ConstStrBlobPtr &lhs, const ConstStrBlobPtr &rhs) {
+  return lhs.wptr.lock() == rhs.wptr.lock() && lhs.curr < rhs.curr;
+}
+
+bool operator>(const ConstStrBlobPtr &lhs, const ConstStrBlobPtr &rhs) {
+  return rhs < lhs;
+}
+
+bool operator<=(const ConstStrBlobPtr &lhs, const ConstStrBlobPtr &rhs) {
+  return !(lhs > rhs);
+}
+
+bool operator>=(const ConstStrBlobPtr &lhs, const ConstStrBlobPtr &rhs) {
+  return !(lhs < rhs);
+}