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use indexmap::IndexMap;
use serde::Serialize;
use std::borrow::Cow;
use std::collections::HashMap;
use std::fmt::{Display, Formatter};

pub use crate::de::{from_slice, from_str};
pub use crate::parser::{parse, Rule};

pub mod error;
mod parser;

mod de;
#[cfg(any(
    feature = "lua",
    feature = "lua51",
    feature = "lua52",
    feature = "lua53",
    feature = "lua54",
    feature = "luajit",
    feature = "luajit52"
))]
mod lua;
#[cfg(feature = "wasm")]
mod wasm;

/// A map of input names and values.
/// The names include their `$` prefix.
pub type Inputs<'a> = HashMap<&'a str, Value<'a>>;

#[derive(Serialize, Debug, Clone)]
#[serde(untagged)]
pub enum Value<'a> {
    /// Key/value map. Values can be mixed types.
    Object(IndexMap<&'a str, Value<'a>>),
    /// Array of values, can be mixed types.
    Array(Vec<Value<'a>>),
    /// UTF-8 string
    String(Cow<'a, str>),
    /// 64-bit signed integer.
    Integer(i64),
    /// 64-bit (double precision) floating point number.
    Float(f64),
    /// true or false
    Boolean(bool),
    /// `null` literal.
    Null(Option<()>),
}

impl<'a> Display for Value<'a> {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        write!(
            f,
            "{}",
            match self {
                Value::Object(_) => "object",
                Value::Array(_) => "array",
                Value::String(_) => "string",
                Value::Integer(_) => "integer",
                Value::Float(_) => "float",
                Value::Boolean(_) => "boolean",
                Value::Null(_) => "null",
            }
        )
    }
}