zshrs 0.11.18

The first compiled Unix shell — bytecode VM, worker pool, AOP intercept, Rkyv caching
Documentation 
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//! Port of `_equal` from `Completion/Zsh/Context/_equal`.
//!
//! Full upstream body (11 lines verbatim):
//! ```text
//! sh: 1  #compdef -equal-
//! sh: 2
//! sh: 3  local -a match mbegin mend
//! sh: 4
//! sh: 5  if _have_glob_qual $PREFIX; then
//! sh: 6    compset -p ${#match[1]}
//! sh: 7    compset -S '[^\)\|\~]#(|\))'
//! sh: 8    _globquals
//! sh: 9  else
//! sh:10    _path_commands
//! sh:11  fi
//! ```
//!
//! `_have_glob_qual`, `_globquals`, `_path_commands` are sibling
//! shell fns — dispatch via `exec_hooks`. `compset` calls go to the
//! real builtin.

use crate::ported::exec_hooks::dispatch_function_call;
use crate::ported::params::{getaparam, getsparam};
use crate::ported::zle::complete::bin_compset;
use crate::ported::zsh_h::{options, MAX_OPS};

fn make_ops() -> options {
    options {
        ind: [0u8; MAX_OPS],
        args: Vec::new(),
        argscount: 0,
        argsalloc: 0,
    }
}

/// `_equal` — `=cmd` / `=(...)` context completion: glob-qualifier
/// expansion if `_have_glob_qual` matches, otherwise path-command
/// completion.
pub fn _equal() -> i32 {
    let prefix = getsparam("PREFIX").unwrap_or_default();

    // sh:5  if _have_glob_qual $PREFIX
    if dispatch_function_call("_have_glob_qual", &[prefix]).unwrap_or(1) == 0 {
        // sh:6  compset -p ${#match[1]}
        let match_arr = getaparam("match").unwrap_or_default();
        let match1_len = match_arr.first().map(|s| s.len()).unwrap_or(0);
        let _ = bin_compset(
            "compset",
            &["-p".to_string(), match1_len.to_string()],
            &make_ops(),
            0,
        );
        // sh:7  compset -S '[^\)\|\~]#(|\))'
        let _ = bin_compset(
            "compset",
            &["-S".to_string(), "[^\\)\\|\\~]#(|\\))".to_string()],
            &make_ops(),
            0,
        );
        // sh:8
        dispatch_function_call("_globquals", &[]).unwrap_or(1)
    } else {
        // sh:10
        dispatch_function_call("_path_commands", &[]).unwrap_or(1)
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn returns_one_without_executor() {
        let _g = crate::test_util::global_state_lock();
        assert_eq!(_equal(), 1);
    }
}