gitql-std 0.20.0

GitQL Standard and Aggregation functions
Documentation 
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use crate::array::*;
use crate::datetime::*;
use crate::general::*;
use crate::number::*;
use crate::range::*;
use crate::regex::*;
use crate::text::*;

use gitql_core::signature::Signature;
use gitql_core::signature::StandardFunction;
use std::collections::HashMap;
use std::sync::OnceLock;

pub fn standard_functions() -> &'static HashMap<&'static str, StandardFunction> {
    static HASHMAP: OnceLock<HashMap<&'static str, StandardFunction>> = OnceLock::new();
    HASHMAP.get_or_init(|| {
        let mut map: HashMap<&'static str, StandardFunction> = HashMap::new();
        register_std_text_functions(&mut map);
        register_std_datetime_functions(&mut map);
        register_std_number_functions(&mut map);
        register_std_general_functions(&mut map);
        register_std_regex_functions(&mut map);
        register_std_array_functions(&mut map);
        register_std_range_functions(&mut map);
        map
    })
}

pub fn standard_function_signatures() -> HashMap<&'static str, Signature> {
    let mut map: HashMap<&'static str, Signature> = HashMap::new();
    register_std_text_function_signatures(&mut map);
    register_std_datetime_function_signatures(&mut map);
    register_std_number_function_signatures(&mut map);
    register_std_general_function_signatures(&mut map);
    register_std_regex_function_signatures(&mut map);
    register_std_array_function_signatures(&mut map);
    register_std_range_function_signatures(&mut map);
    map
}