...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
A list of parameters in an HTTP extension field value.
Defined in header <boost/beast/http/rfc7230.hpp>
class param_list
Name |
Description |
---|---|
A constant iterator to the list. |
|
The type of each element in the list. |
Name |
Description |
---|---|
Return a const iterator to the beginning of the list. |
|
Return a const iterator to the beginning of the list. |
|
Return a const iterator to the end of the list. |
|
Return a const iterator to the end of the list. |
|
param_list [constructor] |
Default constructor. |
This container allows iteration of the parameter list in an HTTP extension. The parameter list is a series of name/value pairs with each pair starting with a semicolon. The value is optional. If a parsing error is encountered while iterating the string, the behavior of the container will be as if a string containing only characters up to but excluding the first invalid character was used to construct the list.
param-list = *( OWS ";" OWS param ) param = token OWS [ "=" OWS ( token / quoted-string ) ]
To use this class, construct with the string to be parsed and then use begin
and end
, or range-for to iterate each
item:
for(auto const& param : param_list{";level=9;no_context_takeover;bits=15"}) { std::cout << ";" << param.first; if(! param.second.empty()) std::cout << "=" << param.second; std::cout << "\n"; }