Module: Regexp::Syntax

Included in:
Parser
Defined in:
lib/regexp_parser/syntax/tokens.rb,
lib/regexp_parser/syntax.rb,
lib/regexp_parser/syntax/tokens.rb,
lib/regexp_parser/syntax/ruby/1.8.rb,
lib/regexp_parser/syntax/ruby/1.9.rb,
lib/regexp_parser/syntax/ruby/2.0.rb,
lib/regexp_parser/syntax/ruby/2.1.rb,
lib/regexp_parser/syntax/ruby/2.2.rb,
lib/regexp_parser/syntax/ruby/2.3.rb,
lib/regexp_parser/syntax/ruby/1.8.6.rb,
lib/regexp_parser/syntax/ruby/1.8.7.rb,
lib/regexp_parser/syntax/ruby/1.9.1.rb,
lib/regexp_parser/syntax/ruby/1.9.2.rb,
lib/regexp_parser/syntax/ruby/1.9.3.rb,
lib/regexp_parser/syntax/ruby/2.0.0.rb,
lib/regexp_parser/syntax/ruby/2.1.0.rb,
lib/regexp_parser/syntax/ruby/2.1.2.rb,
lib/regexp_parser/syntax/ruby/2.1.3.rb,
lib/regexp_parser/syntax/ruby/2.1.4.rb,
lib/regexp_parser/syntax/ruby/2.1.5.rb,
lib/regexp_parser/syntax/ruby/2.1.6.rb,
lib/regexp_parser/syntax/ruby/2.1.7.rb,
lib/regexp_parser/syntax/ruby/2.1.8.rb,
lib/regexp_parser/syntax/ruby/2.2.0.rb,
lib/regexp_parser/syntax/ruby/2.2.1.rb,
lib/regexp_parser/syntax/ruby/2.2.2.rb,
lib/regexp_parser/syntax/ruby/2.2.3.rb,
lib/regexp_parser/syntax/ruby/2.2.4.rb,
lib/regexp_parser/syntax/ruby/2.3.0.rb,
lib/regexp_parser/syntax/tokens/keep.rb,
lib/regexp_parser/syntax/tokens/meta.rb,
lib/regexp_parser/syntax/tokens/group.rb,
lib/regexp_parser/syntax/tokens/anchor.rb,
lib/regexp_parser/syntax/tokens/escape.rb,
lib/regexp_parser/syntax/tokens/backref.rb,
lib/regexp_parser/syntax/tokens/assertion.rb,
lib/regexp_parser/syntax/tokens/quantifier.rb,
lib/regexp_parser/syntax/tokens/conditional.rb,
lib/regexp_parser/syntax/tokens/character_set.rb,
lib/regexp_parser/syntax/tokens/character_type.rb,
lib/regexp_parser/syntax/tokens/unicode_property.rb

Overview

After loading all the tokens the map is full. Extract all tokens and types into the All and Types constants.

Defined Under Namespace

Modules: Ruby, Token Classes: Any, Base, MissingSyntaxSpecError, NotImplementedError, SyntaxError, UnknownSyntaxNameError

Constant Summary collapse

SYNTAX_SPEC_ROOT = 
File.expand_path('../syntax', __FILE__)

Class Method Summary collapse

Class Method Details

.instantiate(name) ⇒ Object 



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# File 'lib/regexp_parser/syntax.rb', line 42

def self.instantiate(name)
  case name
    # Ruby 1.8.x (NOTE: 1.8.6 is no longer a supported runtime,
    # but its regex features are still recognized.)
    when 'ruby/1.8.6';  syntax = Regexp::Syntax::Ruby::V186.new
    when 'ruby/1.8.7';  syntax = Regexp::Syntax::Ruby::V187.new

    # alias for the latest 1.8 implementation
    when 'ruby/1.8';    syntax = Regexp::Syntax::Ruby::V18.new

    # Ruby 1.9.x
    when 'ruby/1.9.1';  syntax = Regexp::Syntax::Ruby::V191.new
    when 'ruby/1.9.2';  syntax = Regexp::Syntax::Ruby::V192.new
    when 'ruby/1.9.3';  syntax = Regexp::Syntax::Ruby::V193.new

    # alias for the latest 1.9 implementation
    when 'ruby/1.9';    syntax = Regexp::Syntax::Ruby::V19.new

    # Ruby 2.0.x
    when 'ruby/2.0.0';  syntax = Regexp::Syntax::Ruby::V200.new

    # aliases for the latest 2.0 implementations
    when 'ruby/2.0';    syntax = Regexp::Syntax::Ruby::V20.new

    # Ruby 2.1.x
    when 'ruby/2.1.0';  syntax = Regexp::Syntax::Ruby::V210.new
    when 'ruby/2.1.2';  syntax = Regexp::Syntax::Ruby::V212.new
    when 'ruby/2.1.3';  syntax = Regexp::Syntax::Ruby::V213.new
    when 'ruby/2.1.4';  syntax = Regexp::Syntax::Ruby::V214.new
    when 'ruby/2.1.5';  syntax = Regexp::Syntax::Ruby::V215.new
    when 'ruby/2.1.6';  syntax = Regexp::Syntax::Ruby::V216.new
    when 'ruby/2.1.7';  syntax = Regexp::Syntax::Ruby::V217.new
    when 'ruby/2.1.8';  syntax = Regexp::Syntax::Ruby::V218.new

    # aliases for the latest 2.1 implementations
    when 'ruby/2.1';    syntax = Regexp::Syntax::Ruby::V21.new

    # Ruby 2.2.x
    when 'ruby/2.2.0';  syntax = Regexp::Syntax::Ruby::V220.new
    when 'ruby/2.2.1';  syntax = Regexp::Syntax::Ruby::V221.new
    when 'ruby/2.2.2';  syntax = Regexp::Syntax::Ruby::V222.new
    when 'ruby/2.2.3';  syntax = Regexp::Syntax::Ruby::V223.new
    when 'ruby/2.2.4';  syntax = Regexp::Syntax::Ruby::V224.new

    # aliases for the latest 2.2 implementations
    when 'ruby/2.2';    syntax = Regexp::Syntax::Ruby::V22.new

    # Ruby 2.3.x
    when 'ruby/2.3.0';  syntax = Regexp::Syntax::Ruby::V230.new

    # alias for the latest 2.3 implementation
    when 'ruby/2.3';    syntax = Regexp::Syntax::Ruby::V23.new

    else
      raise UnknownSyntaxNameError.new(name)
  end
end

.load(name) ⇒ Object

Checks if the named syntax has a specification class file, and requires it if it does. Downcases names, and adds the .rb extension if omitted.

Raises:



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# File 'lib/regexp_parser/syntax.rb', line 102

def self.load(name)
  full = "#{SYNTAX_SPEC_ROOT}/#{name.downcase}"
  full = (full[-1, 3] == '.rb') ? full : "#{full}.rb"

  raise MissingSyntaxSpecError.new(name) unless File.exist?(full)
  require full
end

.new(name) ⇒ Object

Loads, and instantiates an instance of the syntax specification class for the given syntax flavor name. The special names ‘any’ and ‘*’ returns a instance of Syntax::Any. See below for more details.



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# File 'lib/regexp_parser/syntax.rb', line 34

def self.new(name)
  return Regexp::Syntax::Any.new if
    ['*', 'any'].include?( name.to_s )

  self.load(name)
  self.instantiate(name)
end