boost::urls::grammar::dec_octet_rule

Match a decimal octet

Synopsis

Declared in <boost/url/grammar/dec_octet_rule.hpp>

constexpr /* implementation-defined */ dec_octet_rule = {};

Description

A decimal octet is precise way of saying a number from 0 to 255. These are commonly used in IPv4 addresses.

Value Type


using value_type = unsigned char;

Example

Rules are used with the function parse.


system::result< unsigned char > rv = parse( "255", dec_octet_rule );

BNF


dec-octet   = DIGIT                 ; 0-9
            / %x31-39 DIGIT         ; 10-99
            / "1" 2DIGIT            ; 100-199
            / "2" %x30-34 DIGIT     ; 200-249
            / "25" %x30-35          ; 250-255

Specification

3.2.2. Host (rfc3986)