# File merb-core/lib/merb-core/gem_ext/erubis.rb, line 8
 8:     def convert_input(src, input)
 9:       pat = @pattern
10:       regexp = pat.nil? || pat == '<% %>' ? DEFAULT_REGEXP : pattern_regexp(pat)
11:       pos = 0
12:       is_bol = true     # is beginning of line
13:       input.scan(regexp) do |indicator, code, tailch, rspace|
14:         match = Regexp.last_match()
15:         len  = match.begin(0) - pos
16:         text = input[pos, len]
17:         pos  = match.end(0)
18:         ch   = indicator ? indicator[0] : nil
19:         lspace = ch == ?= ? nil : detect_spaces_at_bol(text, is_bol)
20:         is_bol = rspace ? true : false
21:         add_text(src, text) if text && !text.empty?
22:         ## * when '<%= %>', do nothing
23:         ## * when '<% %>' or '<%# %>', delete spaces iff only spaces are around '<% %>'
24:         if ch == ?=              # <%= %>
25:           rspace = nil if tailch && !tailch.empty?
26:           add_text(src, lspace) if lspace
27:           add_expr(src, code, indicator)
28:           add_text(src, rspace) if rspace
29:         elsif ch == ?\#          # <%# %>
30:           n = code.count("\n") + (rspace ? 1 : 0)
31:           if @trim && lspace && rspace
32:             add_stmt(src, "\n" * n)
33:           else
34:             add_text(src, lspace) if lspace
35:             add_stmt(src, "\n" * n)
36:             add_text(src, rspace) if rspace
37:           end
38:         elsif ch == ?%           # <%% %>
39:           s = "#{lspace}#{@prefix||='<%'}#{code}#{tailch}#{@postfix||='%>'}#{rspace}"
40:           add_text(src, s)
41:         else                     # <% %>
42:           if @trim && lspace && rspace
43:             if respond_to?(:add_stmt2)
44:               add_stmt2(src, "#{lspace}#{code}#{rspace}", tailch)
45:             else
46:               add_stmt(src, "#{lspace}#{code}#{rspace}")
47:             end
48:           else
49:             add_text(src, lspace) if lspace
50:             if respond_to?(:add_stmt2)
51:               add_stmt2(src, code, tailch)
52:             else
53:               add_stmt(src, code)
54:             end
55:             add_text(src, rspace) if rspace
56:           end
57:         end
58:       end
59:       #rest = $' || input                        # ruby1.8
60:       rest = pos == 0 ? input : input[pos..-1]   # ruby1.9
61:       add_text(src, rest)
62:     end