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_unary_arg;
use crate::lang::arity::Arity;
use crate::lang::arity::assert_func_arity;
use crate::lang::error::Error;
use crate::lang::escape;
use crate::lang::machine::Machine;
use crate::lang::node::Node;
use crate::value::Value;
use crate::value::list::List;
use crate::value::map::Map;

pub(crate) fn escape(
    adapter: &impl Adapter,
    machine: &mut Machine<'_>,
    stdin: Option<&Value>,
    node: Node,
) -> Result<Value, Error> {
    assert_func_arity(adapter, machine, stdin, &node, &Arity::new(1))?;

    let value = eval_unary_arg(adapter, machine, stdin, node)?;
    let value = value.unwrap_or_default();

    Ok(escape_value(value))
}

pub(crate) fn escape_value(value: Value) -> Value {
    match value {
        Value::List(v) => v.into_iter().map(escape_value).collect::<List>().into(),
        Value::Map(v) => v
            .into_iter()
            .map(|(k, v)| (escape::template(&k), escape_value(v)))
            .collect::<Map>()
            .into(),
        Value::Bytes(mut v) => {
            v.data = escape::template(v.as_bytes());
            v.into()
        }
    }
}