{param foo: 42}
{param foo: 3.14159}
{param foo: 0.0}
{param foo: 7e+8}
{param foo: 2.5E-14}
{param foo: 0x42BADFACE}

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

[
	["soy", [
		["delimiter", "{"],
		["keyword", "param"],
		["parameter", "foo"],
		["punctuation", ":"],
		["number", "42"],
		["delimiter", "}"]
	]],
	["soy", [
		["delimiter", "{"],
		["keyword", "param"],
		["parameter", "foo"],
		["punctuation", ":"],
		["number", "3.14159"],
		["delimiter", "}"]
	]],
	["soy", [
		["delimiter", "{"],
		["keyword", "param"],
		["parameter", "foo"],
		["punctuation", ":"],
		["number", "0.0"],
		["delimiter", "}"]
	]],
	["soy", [
		["delimiter", "{"],
		["keyword", "param"],
		["parameter", "foo"],
		["punctuation", ":"],
		["number", "7e+8"],
		["delimiter", "}"]
	]],
	["soy", [
		["delimiter", "{"],
		["keyword", "param"],
		["parameter", "foo"],
		["punctuation", ":"],
		["number", "2.5E-14"],
		["delimiter", "}"]
	]],
	["soy", [
		["delimiter", "{"],
		["keyword", "param"],
		["parameter", "foo"],
		["punctuation", ":"],
		["number", "0x42BADFACE"],
		["delimiter", "}"]
	]]
]

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

Checks for decimal and hexadecimal numbers.