Function resolve_special_function 

pub fn resolve_special_function(name: &str) -> Option<&'static str>

Resolve special function name for indexed functions

Examples

use mathhook_core::parser::constants::resolve_special_function;

assert_eq!(resolve_special_function("J"), Some("bessel_j"));
assert_eq!(resolve_special_function("P"), Some("legendre_p"));
assert_eq!(resolve_special_function("Unknown"), None);