twig-perversion-tests.twig

<h1> Twig-perversion tests</h1>
<p>twig code for testing twig-perversion</p>

<h2>return</h2>
{% macro testMacro() %}
  {% return "test" %}
  ignore me...
{% endmacro %}

{% set x = _self.testMacro() %}

x = {{x}} 
{# x = test #}
<hr>
{% macro t2(v) %}
  {% if v < 0 %}
    {% return "negative" %}
    ignore me
  {% else %}
    {% return "positive" %}
  {% endif %}
  ignore me
{% endmacro %}

negative: {{ _self.t2(-4)}}
positive: {{ _self.t2(4)}}

<hr>
{% macro double(n) %}
  {% return n * 2 %}
  ignore me
{% endmacro %}
double(4): {{_self.double(4)}}

{% macro triple(n) %}
  {% return n + _self.double(n) %}
  ignore me
{% endmacro %}
triple(4): {{_self.triple(4)}}
<hr>
{% macro recur(n) %}
  {{n}}
  {% if n > 1 %}
    {{ _self.recur(n-1)}}
  {% endif %}
{% endmacro %}

{{ _self.recur(5)}}
<hr>
{% macro fact(n) %}
  {% if n == 1 %}
    {% return 1 %}
  {% endif %}
  {% return n * _self.fact(n-1) %}
{% endmacro %}

1!: {{ _self.fact(1)}}
{% set fact5 = _self.fact(5) %}
5! = {{fact5}}

<h2>while loops</h2>
while loop indexes<br>
{% set x = 0 %}
{% while x < 5 %}
  {{x}} loop: {{loop.index}} {{loop.index0}} {{loop.first ? 'first' : 'not first'}}<br>
  {% set x = x + 1 %}
{% endwhile %}
<hr>
while with loop and loop.parent indexes<br>
{% set x = 0 %}
{% while x < 5 %}
  {% set y = 0 %}
  {% while y < 3 %}
    loop: {{loop.index}} {{loop.index0}} {{loop.first ? 'first' : 'not first'}}
    parent: {{loop.parent.loop.index}} {{loop.parent.loop.index0}} {{loop.parent.loop.first ? 'first': 'not'}}<br>
    {% set y = y + 1 %}
  {% endwhile %}
  {% set x = x + 1 %}
{% endwhile %}
<hr>
while w/ continue on even: 
{% set x = 0 %}
{% while x < 5 %}
  {% set x = x + 1 %}
  {{x}}
  {% if x % 2 == 0 %} {% continue %} {% endif %}
  odd
{% endwhile %}
<hr>
while w/ break on 3: 
{% set x = 0 %}
{% while x < 5 %}
  {{x}}
  {% set x = x + 1 %}
  {% if x  == 3 %} {% break %} {% endif %}
  ..
{% endwhile %}
<hr>

<h4>numeric</h4>
12 ? {{ 12 is numeric ? 'Yes' : 'No' }}
{# Yes #}

-1.3 ? {{ '-1.3' is numeric ? 'Yes' : 'No' }}
{# Yes #}

0x539 ? {{ '0x539' is numeric ? 'Yes' : 'No'}}
{# No #}

<h4>return types</h4>
{% macro foo() %}
  {# ... calculate someValue ... #}
  {% set someValue = 'our return value' %}
  {% return someValue %}
{% endmacro %}

{% macro bar() %}
  {% set x = 0 %}
  {% while x < 5 %}
    x = {{x}}
    {% set x = x + 1 %}
  {% endwhile %}
  {% return %}
{% endmacro %}

{% macro baz() %}
  {% return 23 %}
{% endmacro %}

{{ _self.foo() }}
{{ _self.foo() is string ? 'foo is string' : 'foo is not string' }}<br>

{{ _self.bar() }}
{{ _self.bar() is string ? 'bar is string' : 'bar is not string' }}<br>

{{ _self.baz() }}
{{ _self.baz() is string ? 'baz is string' : 'baz is not string' }}<br>