Update ex13_44_47.cpp

ch13/ex13_44_47.cpp

@@ -2,54 +2,53 @@
 #include <algorithm>
 #include <iostream>
 
-std::pair<char*, char*> 
+std::pair<char*, char*>
 String::alloc_n_copy(const char *b, const char *e)
 {
-	auto str = alloc.allocate(e-b);
-	return{ str, std::uninitialized_copy(b, e, str)};
+    auto str = alloc.allocate(e - b);
+    return{ str, std::uninitialized_copy(b, e, str) };
 }
 
 void String::range_initializer(const char *first, const char *last)
 {
-	auto newstr = alloc_n_copy(first, last);
-	elements = newstr.first;
-	end = newstr.second;
+    auto newstr = alloc_n_copy(first, last);
+    elements = newstr.first;
+    end = newstr.second;
 }
 
 String::String(const char *s)
 {
-	char *sl = const_cast<char*>(s);
-	while (*sl)
-		++sl;
-	range_initializer(s, ++sl);
+    char *sl = const_cast<char*>(s);
+    while (*sl)
+        ++sl;
+    range_initializer(s, ++sl);
 }
 
 String::String(const String& rhs)
 {
-	range_initializer(rhs.elements, rhs.end);
+    range_initializer(rhs.elements, rhs.end);
     std::cout << "copy constructor" << std::endl;
 }
 
 void String::free()
 {
-	if (elements) {
-		std::for_each(elements, end, [this](char &c){ alloc.destroy(&c); });
-		alloc.deallocate(elements, end - elements);
-	}	
+    if (elements) {
+        std::for_each(elements, end, [this](char &c){ alloc.destroy(&c); });
+        alloc.deallocate(elements, end - elements);
+    }
 }
 
 String::~String()
 {
-	free();
+    free();
 }
 
 String& String::operator = (const String &rhs)
 {
-	auto newstr = alloc_n_copy(rhs.elements, rhs.end);
-	free();
-	elements = newstr.first;
-	end = newstr.second;
+    auto newstr = alloc_n_copy(rhs.elements, rhs.end);
+    free();
+    elements = newstr.first;
+    end = newstr.second;
     std::cout << "copy-assignment" << std::endl;
-	return *this;
+    return *this;
 }
-