pipa-lang 1.0.0-alpha.1

A tiny template language
Documentation 
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// SPDX-FileCopyrightText: Copyright 2026 olav@occy.org
// SPDX-License-Identifier: MPL-2.0

use crate::lang::adapter::Adapter;
use crate::lang::args::eval_args;
use crate::lang::args::eval_numeric_args;
use crate::lang::arity::Arity;
use crate::lang::arity::assert_func_arity;
use crate::lang::error::Error;
use crate::lang::machine::Machine;
use crate::lang::node::Node;
use crate::value::Value;
use crate::value::number::Number;

pub(crate) fn cmp_facade(
    adapter: &impl Adapter,
    machine: &mut Machine<'_>,
    stdin: Option<&Value>,
    node: Node,
    f: impl Fn(&[Option<Value>]) -> bool,
) -> Result<Value, Error> {
    assert_func_arity(adapter, machine, stdin, &node, &Arity::min(1))?;

    let nodes = eval_args(adapter, machine, stdin, node)?;

    Ok(nodes
        .windows(2)
        .all(f)
        .then(|| true.into())
        .unwrap_or_default())
}

pub(crate) fn cmp_numeric_facade(
    adapter: &impl Adapter,
    machine: &mut Machine<'_>,
    stdin: Option<&Value>,
    node: Node,
    f: impl Fn(&[Number]) -> bool,
) -> Result<Value, Error> {
    assert_func_arity(adapter, machine, stdin, &node, &Arity::min(1))?;

    let Some(nodes) = eval_numeric_args(adapter, machine, stdin, node)? else {
        return Ok(Value::default());
    };

    Ok(nodes
        .windows(2)
        .all(f)
        .then(|| true.into())
        .unwrap_or_default())
}