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use std::fmt::{Display, Formatter, Result};
use rlua::Value;
#[derive(Clone, Copy, PartialEq, Eq, Debug)]
pub enum ValueType {
/// The Lua value `nil`.
Nil,
/// The Lua value `true` or `false`.
Boolean,
/// A "light userdata" object, equivalent to a raw pointer.
LightUserData,
/// An integer number.
///
/// Any Lua number convertible to a `Integer` will be represented as this variant.
Integer,
/// A floating point number.
Number,
/// An interned string, managed by Lua.
///
/// Unlike Rust strings, Lua strings may not be valid UTF-8.
String,
/// Reference to a Lua table.
Table,
/// Reference to a Lua function (or closure).
Function,
/// Reference to a Lua thread (or coroutine).
Thread,
/// Reference to a userdata object that holds a custom type which implements `UserData`.
/// Special builtin userdata types will be represented as other `Value` variants.
UserData,
/// `Error` is a special builtin userdata type. When received from Lua it is implicitly cloned.
Error,
}
impl Display for ValueType {
fn fmt(&self, f: &mut Formatter) -> Result {
use ValueType::*;
match self {
Nil => write!(f, "Nil"),
Boolean => write!(f, "Boolean"),
LightUserData => write!(f, "LightUserData"),
Integer => write!(f, "Integer"),
Number => write!(f, "Number"),
String => write!(f, "String"),
Table => write!(f, "Table"),
Function => write!(f, "Function"),
Thread => write!(f, "Thread"),
UserData => write!(f, "UserData"),
Error => write!(f, "Error"),
}
}
}
pub fn value_type(value: &Value) -> ValueType {
match value {
Value::Nil => ValueType::Nil,
Value::Boolean(_) => ValueType::Boolean,
Value::LightUserData(_) => ValueType::LightUserData,
Value::Integer(_) => ValueType::Integer,
Value::Number(_) => ValueType::Number,
Value::String(_) => ValueType::String,
Value::Table(_) => ValueType::Table,
Value::Function(_) => ValueType::Function,
Value::Thread(_) => ValueType::Thread,
Value::UserData(_) => ValueType::UserData,
Value::Error(_) => ValueType::Error,
}
}
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