Class: Regexp

Inherits:
Object show all
Defined in:
lib/rbot/irc.rb,
lib/rbot/messagemapper.rb,
lib/rbot/core/utils/extends.rb

Overview

Extensions to the Regexp class, with some common and/or complex regular expressions.

Defined Under Namespace

Modules: Irc

Constant Summary collapse

DIGITS =

We start with some general-purpose ones which will be used in the Irc module too, but are useful regardless

/\d+/
HEX_DIGIT = 
/[0-9A-Fa-f]/
HEX_DIGITS = 
/#{HEX_DIGIT}+/
HEX_OCTET = 
/#{HEX_DIGIT}#{HEX_DIGIT}?/
DEC_OCTET = 
/[01]?\d?\d|2[0-4]\d|25[0-5]/
DEC_IP_ADDR = 
/#{DEC_OCTET}\.#{DEC_OCTET}\.#{DEC_OCTET}\.#{DEC_OCTET}/
HEX_IP_ADDR = 
/#{HEX_OCTET}\.#{HEX_OCTET}\.#{HEX_OCTET}\.#{HEX_OCTET}/
IP_ADDR = 
/#{DEC_IP_ADDR}|#{HEX_IP_ADDR}/
HEX_16BIT =

IPv6, from Resolv::IPv6, without the A..z anchors

/#{HEX_DIGIT}{1,4}/
IP6_8Hex = 
/(?:#{HEX_16BIT}:){7}#{HEX_16BIT}/
IP6_CompressedHex = 
/((?:#{HEX_16BIT}(?::#{HEX_16BIT})*)?)::((?:#{HEX_16BIT}(?::#{HEX_16BIT})*)?)/
IP6_6Hex4Dec = 
/((?:#{HEX_16BIT}:){6,6})#{DEC_IP_ADDR}/
IP6_CompressedHex4Dec = 
/((?:#{HEX_16BIT}(?::#{HEX_16BIT})*)?)::((?:#{HEX_16BIT}:)*)#{DEC_IP_ADDR}/
IP6_ADDR = 
/(?:#{IP6_8Hex})|(?:#{IP6_CompressedHex})|(?:#{IP6_6Hex4Dec})|(?:#{IP6_CompressedHex4Dec})/
IN_ON = 
/in|on/

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.new_list(reg, pfx = "") ⇒ Object

A method to build a regexp that matches a list of something separated by optional commas and/or the word “and”, an optionally repeated prefix, and whitespace.



373
374
375
376
377
378
379
 
# File 'lib/rbot/core/utils/extends.rb', line 373

def Regexp.new_list(reg, pfx = "")
  if pfx.kind_of?(String) and pfx.empty?
    return %r(#{reg}(?:,?(?:\s+and)?\s+#{reg})*)
  else
    return %r(#{reg}(?:,?(?:\s+and)?(?:\s+#{pfx})?\s+#{reg})*)
  end
end

Instance Method Details

#has_captures? ⇒ Boolean

a Regexp has captures when its source has open parenthesis which are preceded by an even number of slashes and not followed by a question mark

Returns:

  • (Boolean) 


7
8
9
 
# File 'lib/rbot/messagemapper.rb', line 7

def has_captures?
  self.source.match(/(?:^|[^\\])(?:\\\\)*\([^?]/)
end

#mm_cleanup ⇒ Object

The MessageMapper cleanup method: does both remove_capture and remove_head_tail



27
28
29
30
31
32
 
# File 'lib/rbot/messagemapper.rb', line 27

def mm_cleanup
  new = self.source.gsub(/(^|[^\\])((?:\\\\)*)\(([^?])/) {
    "%s%s(?:%s" % [$1, $2, $3]
  }.sub(/^\^/,'').sub(/\$$/,'')
  Regexp.new(new, self.options)
end

#remove_captures ⇒ Object

We may want to remove captures



12
13
14
15
16
17
 
# File 'lib/rbot/messagemapper.rb', line 12

def remove_captures
  new = self.source.gsub(/(^|[^\\])((?:\\\\)*)\(([^?])/) {
    "%s%s(?:%s" % [$1, $2, $3]
  }
  Regexp.new(new, self.options)
end

#remove_head_tail ⇒ Object

We may want to remove head and tail anchors



20
21
22
23
 
# File 'lib/rbot/messagemapper.rb', line 20

def remove_head_tail
  new = self.source.sub(/^\^/,'').sub(/\$$/,'')
  Regexp.new(new, self.options)
end