Module: Regexgen::Ast

Defined in:
lib/regexgen/ast.rb

Overview

Classes in the abstract syntax tree representation

Defined Under Namespace

Classes: Alternation, CharClass, Concatenation, Literal, Repetition

Class Method Summary collapse

Class Method Details

.parens(exp, parent) ⇒ Object 



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# File 'lib/regexgen/ast.rb', line 190

def parens(exp, parent)
  if exp.precedence < parent.precedence &&
     !(exp.respond_to?(:single_character?) && exp.single_character?) &&
     !(exp.respond_to?(:single_codepoint?) && exp.single_codepoint?)
    "(?:#{exp})"
  else
    exp.to_s
  end
end