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::error::ErrorKind;
use crate::lang::machine::Machine;
use crate::lang::node::Node;
use crate::value::Value;

pub(crate) fn internal_json(
    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();
    let value = into_internal_json(adapter, machine, value)?;

    Ok(value.into())
}

fn into_internal_json(
    adapter: &impl Adapter,
    machine: &Machine<'_>,
    value: Value,
) -> Result<Vec<u8>, Error> {
    crate::value::format::json_pretty(value).map_err(|_| Error {
        kind: ErrorKind::Func,
        source: adapter.template_source().map(String::from),
        span: machine.span,
        message: "json".into(),
    })
}