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use std::collections::{BTreeMap, HashMap}; use std::hash::{BuildHasher, Hash}; use std::string::String as StdString; use error::*; use types::{Integer, LightUserData, Number}; use string::String; use table::Table; use userdata::{AnyUserData, UserData}; use function::Function; use thread::Thread; use value::{FromLua, Nil, ToLua, Value}; use lua::Lua; impl<'lua> ToLua<'lua> for Value<'lua> { fn to_lua(self, _: &'lua Lua) -> Result<Value<'lua>> { Ok(self) } } impl<'lua> FromLua<'lua> for Value<'lua> { fn from_lua(lua_value: Value<'lua>, _: &'lua Lua) -> Result<Self> { Ok(lua_value) } } impl<'lua> ToLua<'lua> for String<'lua> { fn to_lua(self, _: &'lua Lua) -> Result<Value<'lua>> { Ok(Value::String(self)) } } impl<'lua> FromLua<'lua> for String<'lua> { fn from_lua(value: Value<'lua>, lua: &'lua Lua) -> Result<String<'lua>> { lua.coerce_string(value) } } impl<'lua> ToLua<'lua> for Table<'lua> { fn to_lua(self, _: &'lua Lua) -> Result<Value> { Ok(Value::Table(self)) } } impl<'lua> FromLua<'lua> for Table<'lua> { fn from_lua(value: Value<'lua>, _: &'lua Lua) -> Result<Table<'lua>> { match value { Value::Table(table) => Ok(table), _ => Err(Error::FromLuaConversionError { from: value.type_name(), to: "table", message: None, }), } } } impl<'lua> ToLua<'lua> for Function<'lua> { fn to_lua(self, _: &'lua Lua) -> Result<Value<'lua>> { Ok(Value::Function(self)) } } impl<'lua> FromLua<'lua> for Function<'lua> { fn from_lua(value: Value<'lua>, _: &'lua Lua) -> Result<Function<'lua>> { match value { Value::Function(table) => Ok(table), _ => Err(Error::FromLuaConversionError { from: value.type_name(), to: "function", message: None, }), } } } impl<'lua> ToLua<'lua> for Thread<'lua> { fn to_lua(self, _: &'lua Lua) -> Result<Value<'lua>> { Ok(Value::Thread(self)) } } impl<'lua> FromLua<'lua> for Thread<'lua> { fn from_lua(value: Value<'lua>, _: &'lua Lua) -> Result<Thread<'lua>> { match value { Value::Thread(t) => Ok(t), _ => Err(Error::FromLuaConversionError { from: value.type_name(), to: "thread", message: None, }), } } } impl<'lua> ToLua<'lua> for AnyUserData<'lua> { fn to_lua(self, _: &'lua Lua) -> Result<Value<'lua>> { Ok(Value::UserData(self)) } } impl<'lua> FromLua<'lua> for AnyUserData<'lua> { fn from_lua(value: Value<'lua>, _: &'lua Lua) -> Result<AnyUserData<'lua>> { match value { Value::UserData(ud) => Ok(ud), _ => Err(Error::FromLuaConversionError { from: value.type_name(), to: "userdata", message: None, }), } } } impl<'lua, T: Send + UserData> ToLua<'lua> for T { fn to_lua(self, lua: &'lua Lua) -> Result<Value<'lua>> { Ok(Value::UserData(lua.create_userdata(self)?)) } } impl<'lua, T: UserData + Clone> FromLua<'lua> for T { fn from_lua(value: Value<'lua>, _: &'lua Lua) -> Result<T> { match value { Value::UserData(ud) => Ok(ud.borrow::<T>()?.clone()), _ => Err(Error::FromLuaConversionError { from: value.type_name(), to: "userdata", message: None, }), } } } impl<'lua> ToLua<'lua> for Error { fn to_lua(self, _: &'lua Lua) -> Result<Value<'lua>> { Ok(Value::Error(self)) } } impl<'lua> FromLua<'lua> for Error { fn from_lua(value: Value<'lua>, lua: &'lua Lua) -> Result<Error> { match value { Value::Error(err) => Ok(err), val => Ok(Error::RuntimeError( lua.coerce_string(val) .and_then(|s| Ok(s.to_str()?.to_owned())) .unwrap_or_else(|_| "<unprintable error>".to_owned()), )), } } } impl<'lua> ToLua<'lua> for bool { fn to_lua(self, _: &'lua Lua) -> Result<Value<'lua>> { Ok(Value::Boolean(self)) } } impl<'lua> FromLua<'lua> for bool { fn from_lua(v: Value, _: &'lua Lua) -> Result<Self> { match v { Value::Nil => Ok(false), Value::Boolean(b) => Ok(b), _ => Ok(true), } } } impl<'lua> ToLua<'lua> for LightUserData { fn to_lua(self, _: &'lua Lua) -> Result<Value<'lua>> { Ok(Value::LightUserData(self)) } } impl<'lua> FromLua<'lua> for LightUserData { fn from_lua(value: Value, _: &'lua Lua) -> Result<Self> { match value { Value::LightUserData(ud) => Ok(ud), _ => Err(Error::FromLuaConversionError { from: value.type_name(), to: "light userdata", message: None, }), } } } impl<'lua> ToLua<'lua> for StdString { fn to_lua(self, lua: &'lua Lua) -> Result<Value<'lua>> { Ok(Value::String(lua.create_string(&self)?)) } } impl<'lua> FromLua<'lua> for StdString { fn from_lua(value: Value<'lua>, lua: &'lua Lua) -> Result<Self> { Ok(lua.coerce_string(value)?.to_str()?.to_owned()) } } impl<'lua, 'a> ToLua<'lua> for &'a str { fn to_lua(self, lua: &'lua Lua) -> Result<Value<'lua>> { Ok(Value::String(lua.create_string(self)?)) } } macro_rules! lua_convert_int { ($x: ty) => { impl<'lua> ToLua<'lua> for $x { fn to_lua(self, _: &'lua Lua) -> Result<Value<'lua>> { Ok(Value::Integer(self as Integer)) } } impl<'lua> FromLua<'lua> for $x { fn from_lua(value: Value<'lua>, lua: &'lua Lua) -> Result<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) -> Result<Value<'lua>> { Ok(Value::Number(self as Number)) } } impl<'lua> FromLua<'lua> for $x { fn from_lua(value: Value<'lua>, lua: &'lua Lua) -> Result<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) -> Result<Value<'lua>> { Ok(Value::Table(lua.create_sequence_from(self)?)) } } impl<'lua, T: FromLua<'lua>> FromLua<'lua> for Vec<T> { fn from_lua(value: Value<'lua>, _: &'lua Lua) -> Result<Self> { if let Value::Table(table) = value { table.sequence_values().collect() } else { Err(Error::FromLuaConversionError { from: value.type_name(), to: "Vec", message: Some("expected table".to_string()), }) } } } impl<'lua, K: Eq + Hash + ToLua<'lua>, V: ToLua<'lua>, S: BuildHasher> ToLua<'lua> for HashMap<K, V, S> { fn to_lua(self, lua: &'lua Lua) -> Result<Value<'lua>> { Ok(Value::Table(lua.create_table_from(self)?)) } } impl<'lua, K: Eq + Hash + FromLua<'lua>, V: FromLua<'lua>, S: BuildHasher + Default> FromLua<'lua> for HashMap<K, V, S> { fn from_lua(value: Value<'lua>, _: &'lua Lua) -> Result<Self> { if let Value::Table(table) = value { table.pairs().collect() } else { Err(Error::FromLuaConversionError { from: value.type_name(), to: "HashMap", message: Some("expected table".to_string()), }) } } } impl<'lua, K: Ord + ToLua<'lua>, V: ToLua<'lua>> ToLua<'lua> for BTreeMap<K, V> { fn to_lua(self, lua: &'lua Lua) -> Result<Value<'lua>> { Ok(Value::Table(lua.create_table_from(self)?)) } } impl<'lua, K: Ord + FromLua<'lua>, V: FromLua<'lua>> FromLua<'lua> for BTreeMap<K, V> { fn from_lua(value: Value<'lua>, _: &'lua Lua) -> Result<Self> { if let Value::Table(table) = value { table.pairs().collect() } else { Err(Error::FromLuaConversionError { from: value.type_name(), to: "BTreeMap", message: Some("expected table".to_string()), }) } } } impl<'lua, T: ToLua<'lua>> ToLua<'lua> for Option<T> { fn to_lua(self, lua: &'lua Lua) -> Result<Value<'lua>> { match self { Some(val) => val.to_lua(lua), None => Ok(Nil), } } } impl<'lua, T: FromLua<'lua>> FromLua<'lua> for Option<T> { fn from_lua(value: Value<'lua>, lua: &'lua Lua) -> Result<Self> { match value { Nil => Ok(None), value => Ok(Some(T::from_lua(value, lua)?)), } } }