class FormatEngine::FormatRgx

A format engine set specification.

Attributes

long_name[R]

The full name of the set.

regex[R]

The regular expression part of this set specification.

short_name[R]

The short form name of the set.

Public Class Methods

new(format) click to toggle source

Setup a variable format specification.

# File lib/format_engine/format_spec/rgx.rb, line 21
def initialize(format)
  @long_name = format
  pre, _, post = format.partition('/')
  @short_name = pre + '/'

  exp, _, options = post.partition(/(?<=[^\\])\// )
  opt = (options.include?('x') ? Regexp::EXTENDED   : 0) |
        (options.include?('i') ? Regexp::IGNORECASE : 0) |
        (options.include?('m') ? Regexp::MULTILINE  : 0)

  @regex = Regexp.new(exp.gsub(/\\\//, '/'), opt)
end

Public Instance Methods

do_format(spec_info) click to toggle source

Format onto the output string

# File lib/format_engine/format_spec/rgx.rb, line 42
def do_format(spec_info)
  fail "The tag %{@raw} may not be used in formatting."
end
do_parse(spec_info) click to toggle source

Parse from the input string

# File lib/format_engine/format_spec/rgx.rb, line 47
def do_parse(spec_info)
  spec_info.instance_exec(&@block)
end
inspect() click to toggle source

Inspect for debugging.

# File lib/format_engine/format_spec/rgx.rb, line 52
def inspect
  "Regex(#{@long_name.inspect}, #{@short_name.inspect}, #{regex.inspect})"
end
validate(engine) click to toggle source

Is this format item supported by the engine's library?

# File lib/format_engine/format_spec/rgx.rb, line 35
def validate(engine)
  @block = engine[@long_name] || engine[@short_name]
  fail "Unsupported tag = #{@raw.inspect}" unless @block
  true
end
width() click to toggle source

The width parameter. Handled internally so this is always zero.

# File lib/format_engine/format_spec/rgx.rb, line 16
def width
  0
end