Class: Hamlit::StaticAnalyzer

Inherits:
Object
  • Object
show all
Defined in:
lib/hamlit/static_analyzer.rb

Constant Summary collapse

STATIC_TOKENS = 
%i[
  on_tstring_beg on_tstring_end on_tstring_content
  on_embexpr_beg on_embexpr_end
  on_lbracket on_rbracket
  on_qwords_beg on_words_sep on_qwords_sep
  on_lparen on_rparen
  on_lbrace on_rbrace on_label
  on_int on_float on_imaginary
  on_comma on_sp
].freeze
DYNAMIC_TOKENS = 
%i[
  on_ident on_period
].freeze
STATIC_KEYWORDS = 
%w[
  true false nil
].freeze
STATIC_OPERATORS = 
%w[
  =>
].freeze

Class Method Summary collapse

Class Method Details

.static?(exp) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hamlit/static_analyzer.rb', line 28

def self.static?(exp)
  return false if exp.nil? || exp.strip.empty?
  return false if RubyExpression.syntax_error?(exp)

  Ripper.lex(exp).each do |(_, col), token, str|
    case token
    when *STATIC_TOKENS
      # noop
    when :on_kw
      return false unless STATIC_KEYWORDS.include?(str)
    when :on_op
      return false unless STATIC_OPERATORS.include?(str)
    when *DYNAMIC_TOKENS
      return false
    else
      return false
    end
  end
  true
end