Class: BRB::Parser

Inherits:
ActionView::Template::Handlers::ERB::Erubi
  • Object
show all
Defined in:
lib/brb.rb

Instance Method Summary collapse

Constructor Details

#initialize(input) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/brb.rb', line 62

def initialize(input, ...)
  frontmatter = $1 if input.sub! /\A(.*?)~~~\n/m, ""
  backmatter  = $1 if input.sub! /~~~\n(.*?)\z/m, ""

  @scanner = StringScanner.new(input)
  input    = +""
  @mode    = :start

  if @mode == :start
    if scan = @scanner.scan_until(/(?=\\)/)
      input << scan
      @scanner.skip(/\\/)
      @mode = :open
    else
      input << @scanner.rest
      @scanner.terminate
    end
  else
    case token = @scanner.scan(/#|=|#{Sigil.names.join("\\b|")}\b/)
    when "#"          then @scanner.scan_until(/\n/)
    when *Sigil.names then input << Sigil.replace(@scanner, token)
    when "="          then input << "<%=" << @scanner.scan_until(/(?=<\/|\r?\n)/) << " %>"
    else
      @scanner.scan_until(/(?=\r?\n)/)&.then { input << "<% " << _1 << " %>" }
    end

    @mode = :start
  end until @scanner.eos?

  super
end