Class: Twofold::Parser

Inherits:
Temple::Parser
  • Object
show all
Defined in:
lib/twofold/parser.rb

Instance Method Summary collapse

Instance Method Details

#call(input) ⇒ Object 



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# File 'lib/twofold/parser.rb', line 4

def call(input)
  result = [:multi]

  @lines = input.split(/\r?\n/)
  @line_no = 0
  @stack = [result]

  parse_line while next_line

  result
end

#indented(str) {|str.lstrip| ... } ⇒ Object

Yields:

  • (str.lstrip) 


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# File 'lib/twofold/parser.rb', line 50

def indented(str)
  indent = str[/\A\s*/]
  @stack.push([:multi])
  yield str.lstrip
  inner = @stack.pop
  @stack.last << [:twofold, :indented, indent, inner]
end

#next_line ⇒ Object 



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# File 'lib/twofold/parser.rb', line 16

def next_line
  if @lines.empty?
    @line = nil
  else
    @line = @lines.shift
    @line_no += 1
  end
end

#parse_line ⇒ Object 



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# File 'lib/twofold/parser.rb', line 25

def parse_line
  line = @line.lstrip

  case line[0]
  when '\\'
    indented line[1..] do |text|
      @stack.last << [:twofold, :interpolate, text]
    end
  when '|'
    indented line[1..] do |text|
      @stack.last << [:twofold, :interpolate, text]
    end
    @stack.last << [:twofold, :newline]
  when '='
    indented line[1..] do |code|
      @stack.last << [:code, code]
    end
  when nil
    # empty line
  else
    @stack.last << [:code, line]
  end
  @stack.last << [:newline]
end