grass/src/builtin/string.rs

use std::collections::BTreeMap;

use super::Builtin;
use crate::value::Value;

pub(crate) fn register(f: &mut BTreeMap<String, Builtin>) {
    decl!(f "to-upper-case", |args, _| {
        let s: &Value = arg!(args, 0, "string");
        match s.eval() {
            Value::Ident(i, q) => Some(Value::Ident(i.to_ascii_uppercase(), q)),
            _ => todo!("")
        }
    });
    decl!(f "to-lower-case", |args, _| {
        let s: &Value = arg!(args, 0, "string");
        match s.eval() {
            Value::Ident(i, q) => Some(Value::Ident(i.to_ascii_lowercase(), q)),
            _ => todo!("")
        }
    });
}