Class: Twig::TokenParser::If

Inherits:
Base
  • Object
show all
Defined in:
lib/twig/token_parser/if.rb

Overview

Marks a section of a template as being reusable.

{% if condition %}
  Something
{% else %}
  Something else
{% endif %}

Instance Attribute Summary

Attributes inherited from Base

#parser

Instance Method Summary collapse

Instance Method Details

#parse(token) ⇒ Object 



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# File 'lib/twig/token_parser/if.rb', line 13

def parse(token)
  lineno = token.lineno
  expr = parser.expression_parser.parse_expression
  stream = parser.stream
  stream.expect(Token::BLOCK_END_TYPE)
  body = parser.subparse(decide_if_fork)
  tests = [expr, body]
  else_node = nil

  if_ended = false
  until if_ended
    case stream.next.value
    when 'else'
      stream.expect(Token::BLOCK_END_TYPE)
      else_node = parser.subparse(decide_if_end)
    when 'elsif', 'elseif'
      expr = parser.expression_parser.parse_expression
      stream.expect(Token::BLOCK_END_TYPE)
      body = parser.subparse(decide_if_fork)
      tests.push(expr, body)
    when 'endif'
      if_ended = true
    else
      raise 'Unexpected end of template, expect else, elseif, or endif'
    end
  end

  stream.expect(Token::BLOCK_END_TYPE)

  tests_hash = tests.
    each_with_index.
    to_h { |t, i| [i, t] }

  Node::If.new(Node::Nodes.new(tests_hash), else_node, lineno)
end

#tag ⇒ Object 



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# File 'lib/twig/token_parser/if.rb', line 49

def tag
  'if'
end