{{ 1_u32 }}
{% 2_u32 %}
{{ { 3_u32 } }}
{% % 4_u32 % %}

----------------------------------------------------

[
	["expansion", [
		["delimiter", "{{"],
		["number", "1_u32"],
		["delimiter", "}}"]
	]],
	["expansion", [
		["delimiter", "{%"],
		["number", "2_u32"],
		["delimiter", "%}"]
	]],
	["expansion", [
		["delimiter", "{{"],
		["punctuation", "{"],
		["number", "3_u32"],
		["punctuation", "}"],
		["delimiter", "}}"]
	]],
	["expansion", [
		["delimiter", "{%"],
		["operator", "%"],
		["number", "4_u32"],
		["operator", "%"],
		["delimiter", "%}"]
	]]
]

----------------------------------------------------

Checks for macro expansions.