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book: add line breaks for code formatting (#226)

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This commit is contained in:
Lucas Vilas-Bôas
2022-02-28 05:58:23 -03:00
committed by GitHub
parent 1db84fe462
commit afdc39431f
2 changed files with 27 additions and 17 deletions
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10
book/en-us/05-pointers.md
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@@ -58,20 +58,26 @@ auto pointer = std::make_shared<int>(10);
auto pointer2 = pointer; // reference count+1
auto pointer3 = pointer; // reference count+1
int *p = pointer.get(); // no increase of reference count
std::cout << "pointer.use_count() = " << pointer.use_count() << std::endl; // 3
std::cout << "pointer2.use_count() = " << pointer2.use_count() << std::endl; // 3
std::cout << "pointer3.use_count() = " << pointer3.use_count() << std::endl; // 3
pointer2.reset();
std::cout << "reset pointer2:" << std::endl;
std::cout << "pointer.use_count() = " << pointer.use_count() << std::endl; // 2
std::cout << "pointer2.use_count() = " << pointer2.use_count() << std::endl; // 0, pointer2 has reset
std::cout << "pointer2.use_count() = "
<< pointer2.use_count() << std::endl; // 0, pointer2 has reset
std::cout << "pointer3.use_count() = " << pointer3.use_count() << std::endl; // 2
pointer3.reset();
std::cout << "reset pointer3:" << std::endl;
std::cout << "pointer.use_count() = " << pointer.use_count() << std::endl; // 1
std::cout << "pointer2.use_count() = " << pointer2.use_count() << std::endl; // 0
std::cout << "pointer3.use_count() = " << pointer3.use_count() << std::endl; // 0, pointer3 has reset
std::cout << "pointer3.use_count() = "
<< pointer3.use_count() << std::endl; // 0, pointer3 has reset
```
## 5.3 `std::unique_ptr`

34
book/en-us/06-regex.md
View File

@@ -84,7 +84,8 @@ We use a simple example to briefly introduce the use of this library. Consider t
int main() {
std::string fnames[] = {"foo.txt", "bar.txt", "test", "a0.txt", "AAA.txt"};
// In C++, `\` will be used as an escape character in the string. In order for `\.` to be passed as a regular expression, it is necessary to perform second escaping of `\`, thus we have `\\.`
// In C++, `\` will be used as an escape character in the string. In order for `\.`
// to be passed as a regular expression, it is necessary to perform second escaping of `\`, thus we have `\\.`
std::regex txt_regex("[a-z]+\\.txt");
for (const auto &fname: fnames)
std::cout << fname << ": " << std::regex_match(fname, txt_regex) << std::endl;
@@ -186,29 +187,32 @@ Please implement the member functions `start()` and `parse_request`. Enable serv
template<typename SERVER_TYPE>
void start_server(SERVER_TYPE &server) {
// process GET request for /match/[digit+numbers], e.g. GET request is /match/abc123, will return abc123
// process GET request for /match/[digit+numbers], e.g.
// GET request is /match/abc123, will return abc123
server.resource["fill_your_reg_ex"]["GET"] = [](ostream& response, Request& request) {
string number=request.path_match[1];
response << "HTTP/1.1 200 OK\r\nContent-Length: " << number.length() << "\r\n\r\n" << number;
response << "HTTP/1.1 200 OK\r\nContent-Length: " << number.length()
<< "\r\n\r\n" << number;
};
// peocess default GET request; anonymous function will be called if no other matches
// response files in folder web/
// default: index.html
server.default_resource["fill_your_reg_ex"]["GET"] = [](ostream& response, Request& request) {
string filename = "www/";
server.default_resource["fill_your_reg_ex"]["GET"] =
[](ostream& response, Request& request) {
string filename = "www/";
string path = request.path_match[1];
string path = request.path_match[1];
// forbidden use `..` access content outside folder web/
size_t last_pos = path.rfind(".");
size_t current_pos = 0;
size_t pos;
while((pos=path.find('.', current_pos)) != string::npos && pos != last_pos) {
current_pos = pos;
path.erase(pos, 1);
last_pos--;
}
// forbidden use `..` access content outside folder web/
size_t last_pos = path.rfind(".");
size_t current_pos = 0;
size_t pos;
while((pos=path.find('.', current_pos)) != string::npos && pos != last_pos) {
current_pos = pos;
path.erase(pos, 1);
last_pos--;
}
// (...)
};