Module: EcmaReValidator

Defined in:
lib/ecma-re-validator.rb,
lib/ecma-re-validator/version.rb

Constant Summary collapse

UNICODE_CHARACTERS =

JS doesn’t have Unicode matching

Regexp::Syntax::Token::UnicodeProperty::All
INVALID_REGEXP = 
[
  # JS doesn't have \A, \Z, \z
  :bos, :eos_ob_eol, :eos,
  # JS doesn't have lookbehinds
  :lookbehind, :nlookbehind,
  # JS doesn't have atomic grouping
  :atomic,
  # JS doesn't have possesive quantifiers
  :zero_or_one_possessive, :zero_or_more_possessive, :one_or_more_possessive,
  # JS doesn't have named capture groups
  :named_ab, :named_sq,
  # JS doesn't support modifying options
  :options, :options_switch,
  # JS doesn't support conditionals
  :condition_open,
  # JS doesn't support comments
  :comment
].freeze
INVALID_TOKENS = 
INVALID_REGEXP + UNICODE_CHARACTERS
VERSION = 
'0.4.0'

Class Method Summary collapse

Class Method Details

.valid?(input) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ecma-re-validator.rb', line 30

def self.valid?(input)
  if input.is_a? String
    begin
      input = Regexp.new(input)
    rescue RegexpError
      return false
    end
  elsif !input.is_a? Regexp
    return false
  end

  Regexp::Scanner.scan(input).none? do |t|
    if t[1] == :word || t[1] == :space || t[1] == :digit
      t[0] != :type
    else
      INVALID_TOKENS.include?(t[1])
    end
  end
end