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use std::collections::{HashMap, BTreeMap, HashSet, BTreeSet}; use std::iter::FromIterator; use std::hash::Hash; use error::*; use lua::*; impl<'lua> ToLua<'lua> for LuaValue<'lua> { fn to_lua(self, _: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(self) } } impl<'lua> FromLua<'lua> for LuaValue<'lua> { fn from_lua(lua_value: LuaValue<'lua>, _: &'lua Lua) -> LuaResult<Self> { Ok(lua_value) } } impl<'lua> ToLua<'lua> for LuaString<'lua> { fn to_lua(self, _: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::String(self)) } } impl<'lua> FromLua<'lua> for LuaString<'lua> { fn from_lua(value: LuaValue<'lua>, lua: &'lua Lua) -> LuaResult<LuaString<'lua>> { lua.coerce_string(value) } } impl<'lua> ToLua<'lua> for LuaTable<'lua> { fn to_lua(self, _: &'lua Lua) -> LuaResult<LuaValue> { Ok(LuaValue::Table(self)) } } impl<'lua> FromLua<'lua> for LuaTable<'lua> { fn from_lua(value: LuaValue<'lua>, _: &'lua Lua) -> LuaResult<LuaTable<'lua>> { match value { LuaValue::Table(table) => Ok(table), _ => Err("cannot convert lua value to table".into()), } } } impl<'lua> ToLua<'lua> for LuaFunction<'lua> { fn to_lua(self, _: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::Function(self)) } } impl<'lua> FromLua<'lua> for LuaFunction<'lua> { fn from_lua(value: LuaValue<'lua>, _: &'lua Lua) -> LuaResult<LuaFunction<'lua>> { match value { LuaValue::Function(table) => Ok(table), _ => Err("cannot convert lua value to function".into()), } } } impl<'lua> ToLua<'lua> for LuaUserData<'lua> { fn to_lua(self, _: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::UserData(self)) } } impl<'lua> FromLua<'lua> for LuaUserData<'lua> { fn from_lua(value: LuaValue<'lua>, _: &'lua Lua) -> LuaResult<LuaUserData<'lua>> { match value { LuaValue::UserData(ud) => Ok(ud), _ => Err("cannot convert lua value to userdata".into()), } } } impl<'lua> ToLua<'lua> for LuaThread<'lua> { fn to_lua(self, _: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::Thread(self)) } } impl<'lua> FromLua<'lua> for LuaThread<'lua> { fn from_lua(value: LuaValue<'lua>, _: &'lua Lua) -> LuaResult<LuaThread<'lua>> { match value { LuaValue::Thread(t) => Ok(t), _ => Err("cannot convert lua value to thread".into()), } } } impl<'lua, T: LuaUserDataType> ToLua<'lua> for T { fn to_lua(self, lua: &'lua Lua) -> LuaResult<LuaValue<'lua>> { lua.create_userdata(self).map(LuaValue::UserData) } } impl<'lua, T: LuaUserDataType + Copy> FromLua<'lua> for T { fn from_lua(value: LuaValue<'lua>, _: &'lua Lua) -> LuaResult<T> { match value { LuaValue::UserData(ud) => Ok(*ud.borrow::<T>()?), _ => Err("cannot convert lua value to userdata".into()), } } } impl<'lua> ToLua<'lua> for bool { fn to_lua(self, _: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::Boolean(self)) } } impl<'lua> FromLua<'lua> for bool { fn from_lua(v: LuaValue, _: &'lua Lua) -> LuaResult<Self> { match v { LuaValue::Nil => Ok(false), LuaValue::Boolean(b) => Ok(b), _ => Ok(true), } } } impl<'lua> ToLua<'lua> for LightUserData { fn to_lua(self, _: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::LightUserData(self)) } } impl<'lua> FromLua<'lua> for LightUserData { fn from_lua(v: LuaValue, _: &'lua Lua) -> LuaResult<Self> { match v { LuaValue::LightUserData(ud) => Ok(ud), _ => Err("cannot convert lua value to lightuserdata".into()), } } } impl<'lua> ToLua<'lua> for String { fn to_lua(self, lua: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::String(lua.create_string(&self)?)) } } impl<'lua> FromLua<'lua> for String { fn from_lua(value: LuaValue<'lua>, lua: &'lua Lua) -> LuaResult<Self> { Ok(lua.coerce_string(value)?.get()?.to_owned()) } } impl<'lua, 'a> ToLua<'lua> for &'a str { fn to_lua(self, lua: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::String(lua.create_string(self)?)) } } macro_rules! lua_convert_int { ($x: ty) => { impl<'lua> ToLua<'lua> for $x { fn to_lua(self, _: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::Integer(self as LuaInteger)) } } impl<'lua> FromLua<'lua> for $x { fn from_lua(value: LuaValue<'lua>, lua: &'lua Lua) -> LuaResult<Self> { Ok(lua.coerce_integer(value)? as $x) } } } } lua_convert_int!(i8); lua_convert_int!(u8); lua_convert_int!(i16); lua_convert_int!(u16); lua_convert_int!(i32); lua_convert_int!(u32); lua_convert_int!(i64); lua_convert_int!(u64); lua_convert_int!(isize); lua_convert_int!(usize); macro_rules! lua_convert_float { ($x: ty) => { impl<'lua> ToLua<'lua> for $x { fn to_lua(self, _: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::Number(self as LuaNumber)) } } impl<'lua> FromLua<'lua> for $x { fn from_lua(value: LuaValue<'lua>, lua: &'lua Lua) -> LuaResult<Self> { Ok(lua.coerce_number(value)? as $x) } } } } lua_convert_float!(f32); lua_convert_float!(f64); impl<'lua, T: ToLua<'lua>> ToLua<'lua> for Vec<T> { fn to_lua(self, lua: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::Table(lua.create_array_table(self)?)) } } impl<'lua, T: FromLua<'lua>> FromLua<'lua> for Vec<T> { fn from_lua(value: LuaValue<'lua>, _: &'lua Lua) -> LuaResult<Self> { if let LuaValue::Table(table) = value { table.array_values() } else { Err("cannot convert lua value to table for Vec".into()) } } } impl<'lua, T: Eq + Hash + ToLua<'lua>> ToLua<'lua> for HashSet<T> { fn to_lua(self, lua: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::Table(lua.create_array_table(self)?)) } } impl<'lua, T: Eq + Hash + FromLua<'lua>> FromLua<'lua> for HashSet<T> { fn from_lua(value: LuaValue<'lua>, _: &'lua Lua) -> LuaResult<Self> { if let LuaValue::Table(table) = value { Ok(HashSet::from_iter(table.array_values()?)) } else { Err("cannot convert lua value to table for HashSet".into()) } } } impl<'lua, T: Ord + ToLua<'lua>> ToLua<'lua> for BTreeSet<T> { fn to_lua(self, lua: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::Table(lua.create_array_table(self)?)) } } impl<'lua, T: Ord + FromLua<'lua>> FromLua<'lua> for BTreeSet<T> { fn from_lua(value: LuaValue<'lua>, _: &'lua Lua) -> LuaResult<Self> { if let LuaValue::Table(table) = value { Ok(BTreeSet::from_iter(table.array_values()?)) } else { Err("cannot convert lua value to table for BTreeSet".into()) } } } impl<'lua, K: Eq + Hash + ToLua<'lua>, V: ToLua<'lua>> ToLua<'lua> for HashMap<K, V> { fn to_lua(self, lua: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::Table(lua.create_table(self)?)) } } impl<'lua, K: Eq + Hash + FromLua<'lua>, V: FromLua<'lua>> FromLua<'lua> for HashMap<K, V> { fn from_lua(value: LuaValue<'lua>, _: &'lua Lua) -> LuaResult<Self> { if let LuaValue::Table(table) = value { Ok(HashMap::from_iter(table.pairs()?)) } else { Err("cannot convert lua value to table for HashMap".into()) } } } impl<'lua, K: Ord + ToLua<'lua>, V: ToLua<'lua>> ToLua<'lua> for BTreeMap<K, V> { fn to_lua(self, lua: &'lua Lua) -> LuaResult<LuaValue<'lua>> { Ok(LuaValue::Table(lua.create_table(self)?)) } } impl<'lua, K: Ord + FromLua<'lua>, V: FromLua<'lua>> FromLua<'lua> for BTreeMap<K, V> { fn from_lua(value: LuaValue<'lua>, _: &'lua Lua) -> LuaResult<Self> { if let LuaValue::Table(table) = value { Ok(BTreeMap::from_iter(table.pairs()?)) } else { Err("cannot convert lua value to table for BTreeMap".into()) } } } impl<'lua, T: ToLua<'lua>> ToLua<'lua> for Option<T> { fn to_lua(self, lua: &'lua Lua) -> LuaResult<LuaValue<'lua>> { match self { Some(val) => val.to_lua(lua), None => Ok(LuaNil), } } } impl<'lua, T: FromLua<'lua>> FromLua<'lua> for Option<T> { fn from_lua(value: LuaValue<'lua>, lua: &'lua Lua) -> LuaResult<Self> { match value { LuaNil => Ok(None), value => Ok(Some(T::from_lua(value, lua)?)), } } }