http::token_list

A list of tokens in a comma separated HTTP field value.

Synopsis

Defined in header <boost/beast/http/rfc7230.hpp>

class token_list

Types

Name	Description
const_iterator	A constant iterator to the list.
value_type	The type of each element in the token list.

Member Functions

Name	Description
begin	Return a const iterator to the beginning of the list.
cbegin	Return a const iterator to the beginning of the list.
cend	Return a const iterator to the end of the list.
end	Return a const iterator to the end of the list.
exists	Return `true` if a token is present in the list.
token_list [constructor]	Construct a list.

Description

This container allows iteration of a list of items in a header field value. The input is a comma separated list of tokens.

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.

BNF

token-list  = *( "," OWS ) token *( OWS "," [ OWS token ] )

To use this class, construct with the string to be parsed and then use begin and end, or range-for to iterate each item:

Example

for ( auto const & token : token_list{ "apple, pear, banana" })
    std::cout << token << "\n" ;