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@emmaly
Last active September 14, 2023 06:23
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Jinja2 Type Testing (useful for constrained environments)
None:
- none
True:
- boolean
False:
- boolean
65535:
- number
- integer
123:
- number
- integer
123.0:
- number
- float
inf:
- number
- float
-inf:
- number
- float
hamburger:
- string
{'food': 'mochi', 'flavor': 'matcha'}:
- dict
[1, 'tacos', 3, 'ice cream']:
- list
(1, 'tacos', 3, 'ice cream'):
- tuple
{%
set test_values = [
none,
true,
false,
0xFFFF,
123,
123.0,
float("inf"),
-float("inf"),
"hamburger",
{"food": "mochi", "flavor": "matcha"},
[1, "tacos", 3, "ice cream"],
(1, "tacos", 3, "ice cream"),
]
%}
{% for t in test_values %}
{%- set v = namespace(types=[]) -%}
{%- if t is none -%}
{%- set v.types = v.types + ['none'] -%}
{%- endif -%}
{%- if t is boolean -%}
{%- set v.types = v.types + ['boolean'] -%}
{%- endif -%}
{%- if t is number and t is not boolean -%}
{%- set v.types = v.types + ['number'] -%}
{%- endif -%}
{%- if t is integer -%}
{%- set v.types = v.types + ['integer'] -%}
{%- endif -%}
{%- if t is float -%}
{%- set v.types = v.types + ['float'] -%}
{%- endif -%}
{%- if t is string -%}
{%- set v.types = v.types + ['string'] -%}
{%- endif -%}
{%- if t is mapping -%}
{%- set v.types = v.types + ['dict'] -%}
{%- endif -%}
{%- if t is sequence and t is not mapping and t is not string and t.pop is undefined -%}
{%- set v.types = v.types + ['tuple'] -%}
{%- endif -%}
{%- if t is sequence and t is not mapping and t is not string and t.pop is not undefined -%}
{%- set v.types = v.types + ['list'] -%}
{%- endif -%}
{{ t ~ ":\n - " ~ (v.types | join("\n - ")) }}
{% endfor %}
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