Module: EZML::TempleLineCounter

Defined in:
lib/ezml/temple_line_counter.rb

Defined Under Namespace

Classes: UnexpectedExpression

Class Method Summary collapse

Class Method Details

.count_lines(exp) ⇒ Object 



5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
# File 'lib/ezml/temple_line_counter.rb', line 5

def self.count_lines(exp)
  type, *args = exp
  case type
  when :multi
    args.map { |a| count_lines(a) }.reduce(:+) || 0
  when :dynamic, :code
    args.first.count("\n")
  when :static
    0 # It has not real newline "\n" but escaped "\\n".
  when :case
    arg, *cases = args
    arg.count("\n") + cases.map do |cond, e|
      (cond == :else ? 0 : cond.count("\n")) + count_lines(e)
    end.reduce(:+)
  when :escape
    count_lines(args[1])
  else
    raise UnexpectedExpression.new("[EZML BUG] Unexpected Temple expression '#{type}' is given!")
  end
end