Class: RubyNext::Language::Rewriters::Abstract

Inherits:
Parser::TreeRewriter
  • Object
show all
Defined in:
lib/ruby-next/language/rewriters/abstract.rb

Direct Known Subclasses

Base, Text

Constant Summary collapse

NAME = 
"custom-rewriter"
SYNTAX_PROBE = 
"1 = [}"
MIN_SUPPORTED_VERSION = 
Gem::Version.new(RubyNext::NEXT_VERSION)

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(context) ⇒ Abstract

Returns a new instance of Abstract.



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# File 'lib/ruby-next/language/rewriters/abstract.rb', line 46

def initialize(context)
  @context = context
  super()
end

Class Method Details

.ast? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ruby-next/language/rewriters/abstract.rb', line 35

def ast?
  false
end

.text? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ruby-next/language/rewriters/abstract.rb', line 31

def text?
  false
end

.unsupported_syntax? ⇒ Boolean

Returns true if the syntax is not supported by the current Ruby (performs syntax check, not version check)

Returns:

  • (Boolean) 


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# File 'lib/ruby-next/language/rewriters/abstract.rb', line 14

def unsupported_syntax?
  save_verbose, $VERBOSE = $VERBOSE, nil
  eval_mid = Kernel.respond_to?(:eval_without_ruby_next) ? :eval_without_ruby_next : :eval
  Kernel.send eval_mid, self::SYNTAX_PROBE, nil, __FILE__, __LINE__
  false
rescue SyntaxError, StandardError
  true
ensure
  $VERBOSE = save_verbose
end

.unsupported_version?(version) ⇒ Boolean

Returns true if the syntax is supported by the specified version

Returns:

  • (Boolean) 


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# File 'lib/ruby-next/language/rewriters/abstract.rb', line 27

def unsupported_version?(version)
  version < self::MIN_SUPPORTED_VERSION
end