Function upper_case 

pub fn upper_case<S: BuildHasher>(
    value: &Value,
    _: &HashMap<String, Value, S>,
) -> Result<Value>

Converts text into UPPERCASE.

Example

use tera::{Context, Tera};
use tera_text_filters::upper_case;

let mut ctx = Context::new();
ctx.insert("i", "soMe Text");

let mut tera = Tera::default();
tera.register_filter("upper_case", upper_case);

let i = "{{ i | upper_case }}";
let rendered = tera.render_str(i, &ctx).unwrap();
assert_eq!(rendered, "SOME TEXT");