Move function and thread into their own modules, auto-formatting
This commit is contained in:
parent
51838f3509
commit
a44b6b5170
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@ -4,10 +4,12 @@ use std::string::String as StdString;
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use error::*;
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use types::{Integer, LightUserData, Number};
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use lua::*;
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use string::String;
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use table::Table;
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use userdata::{AnyUserData, UserData};
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use function::Function;
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use thread::Thread;
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use lua::{FromLua, Lua, Nil, ToLua, Value};
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impl<'lua> ToLua<'lua> for Value<'lua> {
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fn to_lua(self, _: &'lua Lua) -> Result<Value<'lua>> {
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@ -107,7 +107,9 @@ impl fmt::Display for Error {
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match *self {
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Error::SyntaxError { ref message, .. } => write!(fmt, "syntax error: {}", message),
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Error::RuntimeError(ref msg) => write!(fmt, "runtime error: {}", msg),
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Error::GarbageCollectorError(ref msg) => write!(fmt, "garbage collector error: {}", msg),
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Error::GarbageCollectorError(ref msg) => {
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write!(fmt, "garbage collector error: {}", msg)
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}
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Error::ToLuaConversionError {
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from,
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to,
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@ -0,0 +1,239 @@
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use std::os::raw::c_int;
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use ffi;
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use error::*;
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use util::*;
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use types::LuaRef;
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use lua::{FromLuaMulti, MultiValue, ToLuaMulti};
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/// Handle to an internal Lua function.
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#[derive(Clone, Debug)]
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pub struct Function<'lua>(pub(crate) LuaRef<'lua>);
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impl<'lua> Function<'lua> {
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/// Calls the function, passing `args` as function arguments.
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///
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/// The function's return values are converted to the generic type `R`.
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///
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/// # Examples
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///
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/// Call Lua's built-in `tostring` function:
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///
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/// ```
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/// # extern crate rlua;
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/// # use rlua::{Lua, Function, Result};
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/// # fn try_main() -> Result<()> {
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/// let lua = Lua::new();
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/// let globals = lua.globals();
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///
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/// let tostring: Function = globals.get("tostring")?;
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///
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/// assert_eq!(tostring.call::<_, String>(123)?, "123");
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///
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/// # Ok(())
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/// # }
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/// # fn main() {
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/// # try_main().unwrap();
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/// # }
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/// ```
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///
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/// Call a function with multiple arguments:
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///
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/// ```
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/// # extern crate rlua;
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/// # use rlua::{Lua, Function, Result};
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/// # fn try_main() -> Result<()> {
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/// let lua = Lua::new();
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///
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/// let sum: Function = lua.eval(r#"
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/// function(a, b)
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/// return a + b
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/// end
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/// "#, None)?;
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///
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/// assert_eq!(sum.call::<_, u32>((3, 4))?, 3 + 4);
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///
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/// # Ok(())
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/// # }
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/// # fn main() {
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/// # try_main().unwrap();
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/// # }
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/// ```
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pub fn call<A: ToLuaMulti<'lua>, R: FromLuaMulti<'lua>>(&self, args: A) -> Result<R> {
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let lua = self.0.lua;
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unsafe {
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stack_err_guard(lua.state, 0, || {
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let args = args.to_lua_multi(lua)?;
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let nargs = args.len() as c_int;
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check_stack(lua.state, nargs + 3);
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ffi::lua_pushcfunction(lua.state, error_traceback);
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let stack_start = ffi::lua_gettop(lua.state);
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lua.push_ref(lua.state, &self.0);
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for arg in args {
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lua.push_value(lua.state, arg);
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}
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let ret = ffi::lua_pcall(lua.state, nargs, ffi::LUA_MULTRET, stack_start);
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if ret != ffi::LUA_OK {
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return Err(pop_error(lua.state, ret));
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}
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let nresults = ffi::lua_gettop(lua.state) - stack_start;
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let mut results = MultiValue::new();
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check_stack(lua.state, 1);
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for _ in 0..nresults {
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results.push_front(lua.pop_value(lua.state));
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}
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ffi::lua_pop(lua.state, 1);
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R::from_lua_multi(results, lua)
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})
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}
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}
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/// Returns a function that, when called, calls `self`, passing `args` as the first set of
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/// arguments.
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///
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/// If any arguments are passed to the returned function, they will be passed after `args`.
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///
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/// # Examples
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///
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/// ```
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/// # extern crate rlua;
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/// # use rlua::{Lua, Function, Result};
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/// # fn try_main() -> Result<()> {
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/// let lua = Lua::new();
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///
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/// let sum: Function = lua.eval(r#"
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/// function(a, b)
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/// return a + b
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/// end
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/// "#, None)?;
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///
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/// let bound_a = sum.bind(1)?;
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/// assert_eq!(bound_a.call::<_, u32>(2)?, 1 + 2);
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///
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/// let bound_a_and_b = sum.bind(13)?.bind(57)?;
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/// assert_eq!(bound_a_and_b.call::<_, u32>(())?, 13 + 57);
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///
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/// # Ok(())
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/// # }
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/// # fn main() {
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/// # try_main().unwrap();
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/// # }
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/// ```
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pub fn bind<A: ToLuaMulti<'lua>>(&self, args: A) -> Result<Function<'lua>> {
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unsafe extern "C" fn bind_call_impl(state: *mut ffi::lua_State) -> c_int {
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let nargs = ffi::lua_gettop(state);
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let nbinds = ffi::lua_tointeger(state, ffi::lua_upvalueindex(2)) as c_int;
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check_stack(state, nbinds + 2);
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ffi::lua_settop(state, nargs + nbinds + 1);
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ffi::lua_rotate(state, -(nargs + nbinds + 1), nbinds + 1);
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ffi::lua_pushvalue(state, ffi::lua_upvalueindex(1));
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ffi::lua_replace(state, 1);
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for i in 0..nbinds {
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ffi::lua_pushvalue(state, ffi::lua_upvalueindex(i + 3));
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ffi::lua_replace(state, i + 2);
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}
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ffi::lua_call(state, nargs + nbinds, ffi::LUA_MULTRET);
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ffi::lua_gettop(state)
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}
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let lua = self.0.lua;
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unsafe {
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stack_err_guard(lua.state, 0, || {
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let args = args.to_lua_multi(lua)?;
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let nargs = args.len() as c_int;
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check_stack(lua.state, nargs + 3);
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lua.push_ref(lua.state, &self.0);
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ffi::lua_pushinteger(lua.state, nargs as ffi::lua_Integer);
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for arg in args {
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lua.push_value(lua.state, arg);
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}
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protect_lua_call(lua.state, nargs + 2, 1, |state| {
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ffi::lua_pushcclosure(state, bind_call_impl, nargs + 2);
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})?;
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Ok(Function(lua.pop_ref(lua.state)))
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})
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::Function;
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use string::String;
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use lua::Lua;
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#[test]
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fn test_function() {
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let lua = Lua::new();
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let globals = lua.globals();
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lua.exec::<()>(
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r#"
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function concat(arg1, arg2)
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return arg1 .. arg2
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end
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"#,
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None,
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).unwrap();
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let concat = globals.get::<_, Function>("concat").unwrap();
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assert_eq!(concat.call::<_, String>(("foo", "bar")).unwrap(), "foobar");
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}
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#[test]
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fn test_bind() {
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let lua = Lua::new();
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let globals = lua.globals();
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lua.exec::<()>(
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r#"
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function concat(...)
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local res = ""
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for _, s in pairs({...}) do
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res = res..s
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end
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return res
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end
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"#,
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None,
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).unwrap();
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let mut concat = globals.get::<_, Function>("concat").unwrap();
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concat = concat.bind("foo").unwrap();
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concat = concat.bind("bar").unwrap();
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concat = concat.bind(("baz", "baf")).unwrap();
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assert_eq!(
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concat.call::<_, String>(("hi", "wut")).unwrap(),
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"foobarbazbafhiwut"
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);
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}
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#[test]
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fn test_rust_function() {
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let lua = Lua::new();
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let globals = lua.globals();
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lua.exec::<()>(
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r#"
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function lua_function()
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return rust_function()
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end
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-- Test to make sure chunk return is ignored
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return 1
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"#,
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None,
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).unwrap();
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let lua_function = globals.get::<_, Function>("lua_function").unwrap();
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let rust_function = lua.create_function(|_, ()| Ok("hello")).unwrap();
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globals.set("rust_function", rust_function).unwrap();
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assert_eq!(lua_function.call::<_, String>(()).unwrap(), "hello");
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}
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}
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@ -53,6 +53,8 @@ mod conversion;
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mod multi;
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mod string;
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mod table;
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mod function;
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mod thread;
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mod userdata;
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#[cfg(test)]
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@ -63,8 +65,9 @@ pub use types::{Integer, LightUserData, Number};
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pub use multi::Variadic;
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pub use string::String;
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pub use table::{Table, TablePairs, TableSequence};
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pub use function::Function;
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pub use thread::{Thread, ThreadStatus};
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pub use userdata::{AnyUserData, MetaMethod, UserData, UserDataMethods};
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pub use lua::{FromLua, FromLuaMulti, Function, Lua, MultiValue, Nil, Thread, ThreadStatus, ToLua,
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ToLuaMulti, Value};
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pub use lua::{FromLua, FromLuaMulti, Lua, MultiValue, Nil, ToLua, ToLuaMulti, Value};
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pub mod prelude;
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304
src/lua.rs
304
src/lua.rs
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@ -17,6 +17,8 @@ use util::*;
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use types::{Callback, Integer, LightUserData, LuaRef, Number};
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use string::String;
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use table::Table;
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use function::Function;
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use thread::Thread;
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use userdata::{AnyUserData, MetaMethod, UserData, UserDataMethods};
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/// A dynamically typed Lua value.
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@ -144,298 +146,6 @@ pub trait FromLuaMulti<'lua>: Sized {
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fn from_lua_multi(values: MultiValue<'lua>, lua: &'lua Lua) -> Result<Self>;
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}
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/// Handle to an internal Lua function.
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#[derive(Clone, Debug)]
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pub struct Function<'lua>(LuaRef<'lua>);
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impl<'lua> Function<'lua> {
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/// Calls the function, passing `args` as function arguments.
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///
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/// The function's return values are converted to the generic type `R`.
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///
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/// # Examples
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///
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/// Call Lua's built-in `tostring` function:
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///
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/// ```
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/// # extern crate rlua;
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/// # use rlua::{Lua, Function, Result};
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/// # fn try_main() -> Result<()> {
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/// let lua = Lua::new();
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/// let globals = lua.globals();
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///
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/// let tostring: Function = globals.get("tostring")?;
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///
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/// assert_eq!(tostring.call::<_, String>(123)?, "123");
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///
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/// # Ok(())
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/// # }
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/// # fn main() {
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/// # try_main().unwrap();
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/// # }
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/// ```
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///
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/// Call a function with multiple arguments:
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///
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/// ```
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/// # extern crate rlua;
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/// # use rlua::{Lua, Function, Result};
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/// # fn try_main() -> Result<()> {
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/// let lua = Lua::new();
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///
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/// let sum: Function = lua.eval(r#"
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/// function(a, b)
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/// return a + b
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/// end
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/// "#, None)?;
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///
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/// assert_eq!(sum.call::<_, u32>((3, 4))?, 3 + 4);
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///
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/// # Ok(())
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/// # }
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/// # fn main() {
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/// # try_main().unwrap();
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/// # }
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/// ```
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pub fn call<A: ToLuaMulti<'lua>, R: FromLuaMulti<'lua>>(&self, args: A) -> Result<R> {
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let lua = self.0.lua;
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unsafe {
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stack_err_guard(lua.state, 0, || {
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let args = args.to_lua_multi(lua)?;
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let nargs = args.len() as c_int;
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check_stack(lua.state, nargs + 3);
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ffi::lua_pushcfunction(lua.state, error_traceback);
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let stack_start = ffi::lua_gettop(lua.state);
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lua.push_ref(lua.state, &self.0);
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for arg in args {
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lua.push_value(lua.state, arg);
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}
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let ret = ffi::lua_pcall(lua.state, nargs, ffi::LUA_MULTRET, stack_start);
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if ret != ffi::LUA_OK {
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return Err(pop_error(lua.state, ret));
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}
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let nresults = ffi::lua_gettop(lua.state) - stack_start;
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let mut results = MultiValue::new();
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check_stack(lua.state, 1);
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for _ in 0..nresults {
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results.push_front(lua.pop_value(lua.state));
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}
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ffi::lua_pop(lua.state, 1);
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R::from_lua_multi(results, lua)
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})
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}
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}
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/// Returns a function that, when called, calls `self`, passing `args` as the first set of
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/// arguments.
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///
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/// If any arguments are passed to the returned function, they will be passed after `args`.
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///
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/// # Examples
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///
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/// ```
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/// # extern crate rlua;
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/// # use rlua::{Lua, Function, Result};
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/// # fn try_main() -> Result<()> {
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/// let lua = Lua::new();
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///
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/// let sum: Function = lua.eval(r#"
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/// function(a, b)
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/// return a + b
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/// end
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/// "#, None)?;
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///
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/// let bound_a = sum.bind(1)?;
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/// assert_eq!(bound_a.call::<_, u32>(2)?, 1 + 2);
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///
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/// let bound_a_and_b = sum.bind(13)?.bind(57)?;
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/// assert_eq!(bound_a_and_b.call::<_, u32>(())?, 13 + 57);
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///
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/// # Ok(())
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/// # }
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/// # fn main() {
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/// # try_main().unwrap();
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/// # }
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/// ```
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pub fn bind<A: ToLuaMulti<'lua>>(&self, args: A) -> Result<Function<'lua>> {
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unsafe extern "C" fn bind_call_impl(state: *mut ffi::lua_State) -> c_int {
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let nargs = ffi::lua_gettop(state);
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let nbinds = ffi::lua_tointeger(state, ffi::lua_upvalueindex(2)) as c_int;
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check_stack(state, nbinds + 2);
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ffi::lua_settop(state, nargs + nbinds + 1);
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ffi::lua_rotate(state, -(nargs + nbinds + 1), nbinds + 1);
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ffi::lua_pushvalue(state, ffi::lua_upvalueindex(1));
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ffi::lua_replace(state, 1);
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for i in 0..nbinds {
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ffi::lua_pushvalue(state, ffi::lua_upvalueindex(i + 3));
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ffi::lua_replace(state, i + 2);
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}
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ffi::lua_call(state, nargs + nbinds, ffi::LUA_MULTRET);
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ffi::lua_gettop(state)
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}
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let lua = self.0.lua;
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unsafe {
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stack_err_guard(lua.state, 0, || {
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let args = args.to_lua_multi(lua)?;
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let nargs = args.len() as c_int;
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check_stack(lua.state, nargs + 3);
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lua.push_ref(lua.state, &self.0);
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ffi::lua_pushinteger(lua.state, nargs as ffi::lua_Integer);
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for arg in args {
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lua.push_value(lua.state, arg);
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}
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protect_lua_call(lua.state, nargs + 2, 1, |state| {
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ffi::lua_pushcclosure(state, bind_call_impl, nargs + 2);
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})?;
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Ok(Function(lua.pop_ref(lua.state)))
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})
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}
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}
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}
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/// Status of a Lua thread (or coroutine).
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#[derive(Debug, Copy, Clone, Eq, PartialEq)]
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pub enum ThreadStatus {
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/// The thread was just created, or is suspended because it has called `coroutine.yield`.
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///
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/// If a thread is in this state, it can be resumed by calling [`Thread::resume`].
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///
|
||||
/// [`Thread::resume`]: struct.Thread.html#method.resume
|
||||
Resumable,
|
||||
/// Either the thread has finished executing, or the thread is currently running.
|
||||
Unresumable,
|
||||
/// The thread has raised a Lua error during execution.
|
||||
Error,
|
||||
}
|
||||
|
||||
/// Handle to an internal Lua thread (or coroutine).
|
||||
#[derive(Clone, Debug)]
|
||||
pub struct Thread<'lua>(LuaRef<'lua>);
|
||||
|
||||
impl<'lua> Thread<'lua> {
|
||||
/// Resumes execution of this thread.
|
||||
///
|
||||
/// Equivalent to `coroutine.resume`.
|
||||
///
|
||||
/// Passes `args` as arguments to the thread. If the coroutine has called `coroutine.yield`, it
|
||||
/// will return these arguments. Otherwise, the coroutine wasn't yet started, so the arguments
|
||||
/// are passed to its main function.
|
||||
///
|
||||
/// If the thread is no longer in `Active` state (meaning it has finished execution or
|
||||
/// encountered an error), this will return `Err(CoroutineInactive)`, otherwise will return `Ok`
|
||||
/// as follows:
|
||||
///
|
||||
/// If the thread calls `coroutine.yield`, returns the values passed to `yield`. If the thread
|
||||
/// `return`s values from its main function, returns those.
|
||||
///
|
||||
/// # Examples
|
||||
///
|
||||
/// ```
|
||||
/// # extern crate rlua;
|
||||
/// # use rlua::{Lua, Thread, Error, Result};
|
||||
/// # fn try_main() -> Result<()> {
|
||||
/// let lua = Lua::new();
|
||||
/// let thread: Thread = lua.eval(r#"
|
||||
/// coroutine.create(function(arg)
|
||||
/// assert(arg == 42)
|
||||
/// local yieldarg = coroutine.yield(123)
|
||||
/// assert(yieldarg == 43)
|
||||
/// return 987
|
||||
/// end)
|
||||
/// "#, None).unwrap();
|
||||
///
|
||||
/// assert_eq!(thread.resume::<_, u32>(42).unwrap(), 123);
|
||||
/// assert_eq!(thread.resume::<_, u32>(43).unwrap(), 987);
|
||||
///
|
||||
/// // The coroutine has now returned, so `resume` will fail
|
||||
/// match thread.resume::<_, u32>(()) {
|
||||
/// Err(Error::CoroutineInactive) => {},
|
||||
/// unexpected => panic!("unexpected result {:?}", unexpected),
|
||||
/// }
|
||||
/// # Ok(())
|
||||
/// # }
|
||||
/// # fn main() {
|
||||
/// # try_main().unwrap();
|
||||
/// # }
|
||||
/// ```
|
||||
pub fn resume<A, R>(&self, args: A) -> Result<R>
|
||||
where
|
||||
A: ToLuaMulti<'lua>,
|
||||
R: FromLuaMulti<'lua>,
|
||||
{
|
||||
let lua = self.0.lua;
|
||||
unsafe {
|
||||
stack_err_guard(lua.state, 0, || {
|
||||
check_stack(lua.state, 1);
|
||||
|
||||
lua.push_ref(lua.state, &self.0);
|
||||
let thread_state = ffi::lua_tothread(lua.state, -1);
|
||||
|
||||
let status = ffi::lua_status(thread_state);
|
||||
if status != ffi::LUA_YIELD && ffi::lua_gettop(thread_state) == 0 {
|
||||
return Err(Error::CoroutineInactive);
|
||||
}
|
||||
|
||||
ffi::lua_pop(lua.state, 1);
|
||||
|
||||
let args = args.to_lua_multi(lua)?;
|
||||
let nargs = args.len() as c_int;
|
||||
check_stack(thread_state, nargs);
|
||||
|
||||
for arg in args {
|
||||
lua.push_value(thread_state, arg);
|
||||
}
|
||||
|
||||
let ret = ffi::lua_resume(thread_state, lua.state, nargs);
|
||||
if ret != ffi::LUA_OK && ret != ffi::LUA_YIELD {
|
||||
error_traceback(thread_state);
|
||||
return Err(pop_error(thread_state, ret));
|
||||
}
|
||||
|
||||
let nresults = ffi::lua_gettop(thread_state);
|
||||
let mut results = MultiValue::new();
|
||||
check_stack(thread_state, 1);
|
||||
for _ in 0..nresults {
|
||||
results.push_front(lua.pop_value(thread_state));
|
||||
}
|
||||
R::from_lua_multi(results, lua)
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
/// Gets the status of the thread.
|
||||
pub fn status(&self) -> ThreadStatus {
|
||||
let lua = self.0.lua;
|
||||
unsafe {
|
||||
stack_guard(lua.state, 0, || {
|
||||
check_stack(lua.state, 1);
|
||||
|
||||
lua.push_ref(lua.state, &self.0);
|
||||
let thread_state = ffi::lua_tothread(lua.state, -1);
|
||||
ffi::lua_pop(lua.state, 1);
|
||||
|
||||
let status = ffi::lua_status(thread_state);
|
||||
if status != ffi::LUA_OK && status != ffi::LUA_YIELD {
|
||||
ThreadStatus::Error
|
||||
} else if status == ffi::LUA_YIELD || ffi::lua_gettop(thread_state) > 0 {
|
||||
ThreadStatus::Resumable
|
||||
} else {
|
||||
ThreadStatus::Unresumable
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Top level Lua struct which holds the Lua state itself.
|
||||
pub struct Lua {
|
||||
pub(crate) state: *mut ffi::lua_State,
|
||||
|
@ -667,9 +377,8 @@ impl Lua {
|
|||
stack_err_guard(self.state, 0, move || {
|
||||
check_stack(self.state, 2);
|
||||
|
||||
let thread_state = protect_lua_call(self.state, 0, 1, |state| {
|
||||
ffi::lua_newthread(state)
|
||||
})?;
|
||||
let thread_state =
|
||||
protect_lua_call(self.state, 0, 1, |state| ffi::lua_newthread(state))?;
|
||||
self.push_ref(thread_state, &func.0);
|
||||
|
||||
Ok(Thread(self.pop_ref(self.state)))
|
||||
|
@ -723,9 +432,8 @@ impl Lua {
|
|||
check_stack(self.state, 2);
|
||||
let ty = v.type_name();
|
||||
self.push_value(self.state, v);
|
||||
let s = protect_lua_call(self.state, 1, 1, |state| {
|
||||
ffi::lua_tostring(state, -1)
|
||||
})?;
|
||||
let s =
|
||||
protect_lua_call(self.state, 1, 1, |state| ffi::lua_tostring(state, -1))?;
|
||||
if s.is_null() {
|
||||
ffi::lua_pop(self.state, 1);
|
||||
Err(Error::FromLuaConversionError {
|
||||
|
|
|
@ -435,7 +435,7 @@ where
|
|||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::Table;
|
||||
use error::{Result};
|
||||
use error::Result;
|
||||
use lua::{Lua, Nil, Value};
|
||||
|
||||
#[test]
|
||||
|
@ -565,7 +565,10 @@ mod tests {
|
|||
let table = lua.create_table().unwrap();
|
||||
let metatable = lua.create_table().unwrap();
|
||||
metatable
|
||||
.set("__index", lua.create_function(|_, ()| Ok("index_value")).unwrap())
|
||||
.set(
|
||||
"__index",
|
||||
lua.create_function(|_, ()| Ok("index_value")).unwrap(),
|
||||
)
|
||||
.unwrap();
|
||||
table.set_metatable(Some(metatable));
|
||||
assert_eq!(table.get::<_, String>("any_key").unwrap(), "index_value");
|
||||
|
|
186
src/tests.rs
186
src/tests.rs
|
@ -2,7 +2,7 @@ use std::fmt;
|
|||
use std::error;
|
||||
use std::panic::catch_unwind;
|
||||
|
||||
use {Error, ExternalError, Function, Lua, Result, Table, Thread, ThreadStatus, Value, Variadic};
|
||||
use {Error, ExternalError, Function, Lua, Result, Table, Value, Variadic};
|
||||
|
||||
#[test]
|
||||
fn test_load() {
|
||||
|
@ -81,73 +81,6 @@ fn test_eval() {
|
|||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_function() {
|
||||
let lua = Lua::new();
|
||||
let globals = lua.globals();
|
||||
lua.exec::<()>(
|
||||
r#"
|
||||
function concat(arg1, arg2)
|
||||
return arg1 .. arg2
|
||||
end
|
||||
"#,
|
||||
None,
|
||||
).unwrap();
|
||||
|
||||
let concat = globals.get::<_, Function>("concat").unwrap();
|
||||
assert_eq!(concat.call::<_, String>(("foo", "bar")).unwrap(), "foobar");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_bind() {
|
||||
let lua = Lua::new();
|
||||
let globals = lua.globals();
|
||||
lua.exec::<()>(
|
||||
r#"
|
||||
function concat(...)
|
||||
local res = ""
|
||||
for _, s in pairs({...}) do
|
||||
res = res..s
|
||||
end
|
||||
return res
|
||||
end
|
||||
"#,
|
||||
None,
|
||||
).unwrap();
|
||||
|
||||
let mut concat = globals.get::<_, Function>("concat").unwrap();
|
||||
concat = concat.bind("foo").unwrap();
|
||||
concat = concat.bind("bar").unwrap();
|
||||
concat = concat.bind(("baz", "baf")).unwrap();
|
||||
assert_eq!(
|
||||
concat.call::<_, String>(("hi", "wut")).unwrap(),
|
||||
"foobarbazbafhiwut"
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_rust_function() {
|
||||
let lua = Lua::new();
|
||||
let globals = lua.globals();
|
||||
lua.exec::<()>(
|
||||
r#"
|
||||
function lua_function()
|
||||
return rust_function()
|
||||
end
|
||||
|
||||
-- Test to make sure chunk return is ignored
|
||||
return 1
|
||||
"#,
|
||||
None,
|
||||
).unwrap();
|
||||
|
||||
let lua_function = globals.get::<_, Function>("lua_function").unwrap();
|
||||
let rust_function = lua.create_function(|_, ()| Ok("hello")).unwrap();
|
||||
|
||||
globals.set("rust_function", rust_function).unwrap();
|
||||
assert_eq!(lua_function.call::<_, String>(()).unwrap(), "hello");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_lua_multi() {
|
||||
let lua = Lua::new();
|
||||
|
@ -270,8 +203,9 @@ fn test_error() {
|
|||
None,
|
||||
).unwrap();
|
||||
|
||||
let rust_error_function =
|
||||
lua.create_function(|_, ()| -> Result<()> { Err(TestError.to_lua_err()) }).unwrap();
|
||||
let rust_error_function = lua.create_function(|_, ()| -> Result<()> {
|
||||
Err(TestError.to_lua_err())
|
||||
}).unwrap();
|
||||
globals
|
||||
.set("rust_error_function", rust_error_function)
|
||||
.unwrap();
|
||||
|
@ -377,92 +311,6 @@ fn test_error() {
|
|||
};
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_thread() {
|
||||
let lua = Lua::new();
|
||||
let thread = lua.create_thread(
|
||||
lua.eval::<Function>(
|
||||
r#"
|
||||
function (s)
|
||||
local sum = s
|
||||
for i = 1,4 do
|
||||
sum = sum + coroutine.yield(sum)
|
||||
end
|
||||
return sum
|
||||
end
|
||||
"#,
|
||||
None,
|
||||
).unwrap(),
|
||||
).unwrap();
|
||||
|
||||
assert_eq!(thread.status(), ThreadStatus::Resumable);
|
||||
assert_eq!(thread.resume::<_, i64>(0).unwrap(), 0);
|
||||
assert_eq!(thread.status(), ThreadStatus::Resumable);
|
||||
assert_eq!(thread.resume::<_, i64>(1).unwrap(), 1);
|
||||
assert_eq!(thread.status(), ThreadStatus::Resumable);
|
||||
assert_eq!(thread.resume::<_, i64>(2).unwrap(), 3);
|
||||
assert_eq!(thread.status(), ThreadStatus::Resumable);
|
||||
assert_eq!(thread.resume::<_, i64>(3).unwrap(), 6);
|
||||
assert_eq!(thread.status(), ThreadStatus::Resumable);
|
||||
assert_eq!(thread.resume::<_, i64>(4).unwrap(), 10);
|
||||
assert_eq!(thread.status(), ThreadStatus::Unresumable);
|
||||
|
||||
let accumulate = lua.create_thread(
|
||||
lua.eval::<Function>(
|
||||
r#"
|
||||
function (sum)
|
||||
while true do
|
||||
sum = sum + coroutine.yield(sum)
|
||||
end
|
||||
end
|
||||
"#,
|
||||
None,
|
||||
).unwrap(),
|
||||
).unwrap();
|
||||
|
||||
for i in 0..4 {
|
||||
accumulate.resume::<_, ()>(i).unwrap();
|
||||
}
|
||||
assert_eq!(accumulate.resume::<_, i64>(4).unwrap(), 10);
|
||||
assert_eq!(accumulate.status(), ThreadStatus::Resumable);
|
||||
assert!(accumulate.resume::<_, ()>("error").is_err());
|
||||
assert_eq!(accumulate.status(), ThreadStatus::Error);
|
||||
|
||||
let thread = lua.eval::<Thread>(
|
||||
r#"
|
||||
coroutine.create(function ()
|
||||
while true do
|
||||
coroutine.yield(42)
|
||||
end
|
||||
end)
|
||||
"#,
|
||||
None,
|
||||
).unwrap();
|
||||
assert_eq!(thread.status(), ThreadStatus::Resumable);
|
||||
assert_eq!(thread.resume::<_, i64>(()).unwrap(), 42);
|
||||
|
||||
let thread: Thread = lua.eval(
|
||||
r#"
|
||||
coroutine.create(function(arg)
|
||||
assert(arg == 42)
|
||||
local yieldarg = coroutine.yield(123)
|
||||
assert(yieldarg == 43)
|
||||
return 987
|
||||
end)
|
||||
"#,
|
||||
None,
|
||||
).unwrap();
|
||||
|
||||
assert_eq!(thread.resume::<_, u32>(42).unwrap(), 123);
|
||||
assert_eq!(thread.resume::<_, u32>(43).unwrap(), 987);
|
||||
|
||||
match thread.resume::<_, u32>(()) {
|
||||
Err(Error::CoroutineInactive) => {}
|
||||
Err(_) => panic!("resuming dead coroutine error is not CoroutineInactive kind"),
|
||||
_ => panic!("resuming dead coroutine did not return error"),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_result_conversions() {
|
||||
let lua = Lua::new();
|
||||
|
@ -473,7 +321,8 @@ fn test_result_conversions() {
|
|||
"only through failure can we succeed".to_lua_err(),
|
||||
))
|
||||
}).unwrap();
|
||||
let ok = lua.create_function(|_, ()| Ok(Ok::<_, Error>("!".to_owned()))).unwrap();
|
||||
let ok = lua.create_function(|_, ()| Ok(Ok::<_, Error>("!".to_owned())))
|
||||
.unwrap();
|
||||
|
||||
globals.set("err", err).unwrap();
|
||||
globals.set("ok", ok).unwrap();
|
||||
|
@ -516,29 +365,6 @@ fn test_num_conversion() {
|
|||
assert!(globals.get::<_, i64>("n").is_err());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn coroutine_from_closure() {
|
||||
let lua = Lua::new();
|
||||
let thrd_main = lua.create_function(|_, ()| Ok(())).unwrap();
|
||||
lua.globals().set("main", thrd_main).unwrap();
|
||||
let thrd: Thread = lua.eval("coroutine.create(main)", None).unwrap();
|
||||
thrd.resume::<_, ()>(()).unwrap();
|
||||
}
|
||||
|
||||
#[test]
|
||||
#[should_panic]
|
||||
fn coroutine_panic() {
|
||||
let lua = Lua::new();
|
||||
let thrd_main = lua.create_function(|lua, ()| {
|
||||
// whoops, 'main' has a wrong type
|
||||
let _coro: u32 = lua.globals().get("main").unwrap();
|
||||
Ok(())
|
||||
}).unwrap();
|
||||
lua.globals().set("main", thrd_main.clone()).unwrap();
|
||||
let thrd: Thread = lua.create_thread(thrd_main).unwrap();
|
||||
thrd.resume::<_, ()>(()).unwrap();
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_pcall_xpcall() {
|
||||
let lua = Lua::new();
|
||||
|
|
|
@ -0,0 +1,258 @@
|
|||
use std::os::raw::c_int;
|
||||
|
||||
use ffi;
|
||||
use error::*;
|
||||
use util::*;
|
||||
use types::LuaRef;
|
||||
use lua::{FromLuaMulti, MultiValue, ToLuaMulti};
|
||||
|
||||
/// Status of a Lua thread (or coroutine).
|
||||
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
|
||||
pub enum ThreadStatus {
|
||||
/// The thread was just created, or is suspended because it has called `coroutine.yield`.
|
||||
///
|
||||
/// If a thread is in this state, it can be resumed by calling [`Thread::resume`].
|
||||
///
|
||||
/// [`Thread::resume`]: struct.Thread.html#method.resume
|
||||
Resumable,
|
||||
/// Either the thread has finished executing, or the thread is currently running.
|
||||
Unresumable,
|
||||
/// The thread has raised a Lua error during execution.
|
||||
Error,
|
||||
}
|
||||
|
||||
/// Handle to an internal Lua thread (or coroutine).
|
||||
#[derive(Clone, Debug)]
|
||||
pub struct Thread<'lua>(pub(crate) LuaRef<'lua>);
|
||||
|
||||
impl<'lua> Thread<'lua> {
|
||||
/// Resumes execution of this thread.
|
||||
///
|
||||
/// Equivalent to `coroutine.resume`.
|
||||
///
|
||||
/// Passes `args` as arguments to the thread. If the coroutine has called `coroutine.yield`, it
|
||||
/// will return these arguments. Otherwise, the coroutine wasn't yet started, so the arguments
|
||||
/// are passed to its main function.
|
||||
///
|
||||
/// If the thread is no longer in `Active` state (meaning it has finished execution or
|
||||
/// encountered an error), this will return `Err(CoroutineInactive)`, otherwise will return `Ok`
|
||||
/// as follows:
|
||||
///
|
||||
/// If the thread calls `coroutine.yield`, returns the values passed to `yield`. If the thread
|
||||
/// `return`s values from its main function, returns those.
|
||||
///
|
||||
/// # Examples
|
||||
///
|
||||
/// ```
|
||||
/// # extern crate rlua;
|
||||
/// # use rlua::{Lua, Thread, Error, Result};
|
||||
/// # fn try_main() -> Result<()> {
|
||||
/// let lua = Lua::new();
|
||||
/// let thread: Thread = lua.eval(r#"
|
||||
/// coroutine.create(function(arg)
|
||||
/// assert(arg == 42)
|
||||
/// local yieldarg = coroutine.yield(123)
|
||||
/// assert(yieldarg == 43)
|
||||
/// return 987
|
||||
/// end)
|
||||
/// "#, None).unwrap();
|
||||
///
|
||||
/// assert_eq!(thread.resume::<_, u32>(42).unwrap(), 123);
|
||||
/// assert_eq!(thread.resume::<_, u32>(43).unwrap(), 987);
|
||||
///
|
||||
/// // The coroutine has now returned, so `resume` will fail
|
||||
/// match thread.resume::<_, u32>(()) {
|
||||
/// Err(Error::CoroutineInactive) => {},
|
||||
/// unexpected => panic!("unexpected result {:?}", unexpected),
|
||||
/// }
|
||||
/// # Ok(())
|
||||
/// # }
|
||||
/// # fn main() {
|
||||
/// # try_main().unwrap();
|
||||
/// # }
|
||||
/// ```
|
||||
pub fn resume<A, R>(&self, args: A) -> Result<R>
|
||||
where
|
||||
A: ToLuaMulti<'lua>,
|
||||
R: FromLuaMulti<'lua>,
|
||||
{
|
||||
let lua = self.0.lua;
|
||||
unsafe {
|
||||
stack_err_guard(lua.state, 0, || {
|
||||
check_stack(lua.state, 1);
|
||||
|
||||
lua.push_ref(lua.state, &self.0);
|
||||
let thread_state = ffi::lua_tothread(lua.state, -1);
|
||||
|
||||
let status = ffi::lua_status(thread_state);
|
||||
if status != ffi::LUA_YIELD && ffi::lua_gettop(thread_state) == 0 {
|
||||
return Err(Error::CoroutineInactive);
|
||||
}
|
||||
|
||||
ffi::lua_pop(lua.state, 1);
|
||||
|
||||
let args = args.to_lua_multi(lua)?;
|
||||
let nargs = args.len() as c_int;
|
||||
check_stack(thread_state, nargs);
|
||||
|
||||
for arg in args {
|
||||
lua.push_value(thread_state, arg);
|
||||
}
|
||||
|
||||
let ret = ffi::lua_resume(thread_state, lua.state, nargs);
|
||||
if ret != ffi::LUA_OK && ret != ffi::LUA_YIELD {
|
||||
error_traceback(thread_state);
|
||||
return Err(pop_error(thread_state, ret));
|
||||
}
|
||||
|
||||
let nresults = ffi::lua_gettop(thread_state);
|
||||
let mut results = MultiValue::new();
|
||||
check_stack(thread_state, 1);
|
||||
for _ in 0..nresults {
|
||||
results.push_front(lua.pop_value(thread_state));
|
||||
}
|
||||
R::from_lua_multi(results, lua)
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
/// Gets the status of the thread.
|
||||
pub fn status(&self) -> ThreadStatus {
|
||||
let lua = self.0.lua;
|
||||
unsafe {
|
||||
stack_guard(lua.state, 0, || {
|
||||
check_stack(lua.state, 1);
|
||||
|
||||
lua.push_ref(lua.state, &self.0);
|
||||
let thread_state = ffi::lua_tothread(lua.state, -1);
|
||||
ffi::lua_pop(lua.state, 1);
|
||||
|
||||
let status = ffi::lua_status(thread_state);
|
||||
if status != ffi::LUA_OK && status != ffi::LUA_YIELD {
|
||||
ThreadStatus::Error
|
||||
} else if status == ffi::LUA_YIELD || ffi::lua_gettop(thread_state) > 0 {
|
||||
ThreadStatus::Resumable
|
||||
} else {
|
||||
ThreadStatus::Unresumable
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::{Thread, ThreadStatus};
|
||||
use error::Error;
|
||||
use function::Function;
|
||||
use lua::Lua;
|
||||
|
||||
#[test]
|
||||
fn test_thread() {
|
||||
let lua = Lua::new();
|
||||
let thread = lua.create_thread(
|
||||
lua.eval::<Function>(
|
||||
r#"
|
||||
function (s)
|
||||
local sum = s
|
||||
for i = 1,4 do
|
||||
sum = sum + coroutine.yield(sum)
|
||||
end
|
||||
return sum
|
||||
end
|
||||
"#,
|
||||
None,
|
||||
).unwrap(),
|
||||
).unwrap();
|
||||
|
||||
assert_eq!(thread.status(), ThreadStatus::Resumable);
|
||||
assert_eq!(thread.resume::<_, i64>(0).unwrap(), 0);
|
||||
assert_eq!(thread.status(), ThreadStatus::Resumable);
|
||||
assert_eq!(thread.resume::<_, i64>(1).unwrap(), 1);
|
||||
assert_eq!(thread.status(), ThreadStatus::Resumable);
|
||||
assert_eq!(thread.resume::<_, i64>(2).unwrap(), 3);
|
||||
assert_eq!(thread.status(), ThreadStatus::Resumable);
|
||||
assert_eq!(thread.resume::<_, i64>(3).unwrap(), 6);
|
||||
assert_eq!(thread.status(), ThreadStatus::Resumable);
|
||||
assert_eq!(thread.resume::<_, i64>(4).unwrap(), 10);
|
||||
assert_eq!(thread.status(), ThreadStatus::Unresumable);
|
||||
|
||||
let accumulate = lua.create_thread(
|
||||
lua.eval::<Function>(
|
||||
r#"
|
||||
function (sum)
|
||||
while true do
|
||||
sum = sum + coroutine.yield(sum)
|
||||
end
|
||||
end
|
||||
"#,
|
||||
None,
|
||||
).unwrap(),
|
||||
).unwrap();
|
||||
|
||||
for i in 0..4 {
|
||||
accumulate.resume::<_, ()>(i).unwrap();
|
||||
}
|
||||
assert_eq!(accumulate.resume::<_, i64>(4).unwrap(), 10);
|
||||
assert_eq!(accumulate.status(), ThreadStatus::Resumable);
|
||||
assert!(accumulate.resume::<_, ()>("error").is_err());
|
||||
assert_eq!(accumulate.status(), ThreadStatus::Error);
|
||||
|
||||
let thread = lua.eval::<Thread>(
|
||||
r#"
|
||||
coroutine.create(function ()
|
||||
while true do
|
||||
coroutine.yield(42)
|
||||
end
|
||||
end)
|
||||
"#,
|
||||
None,
|
||||
).unwrap();
|
||||
assert_eq!(thread.status(), ThreadStatus::Resumable);
|
||||
assert_eq!(thread.resume::<_, i64>(()).unwrap(), 42);
|
||||
|
||||
let thread: Thread = lua.eval(
|
||||
r#"
|
||||
coroutine.create(function(arg)
|
||||
assert(arg == 42)
|
||||
local yieldarg = coroutine.yield(123)
|
||||
assert(yieldarg == 43)
|
||||
return 987
|
||||
end)
|
||||
"#,
|
||||
None,
|
||||
).unwrap();
|
||||
|
||||
assert_eq!(thread.resume::<_, u32>(42).unwrap(), 123);
|
||||
assert_eq!(thread.resume::<_, u32>(43).unwrap(), 987);
|
||||
|
||||
match thread.resume::<_, u32>(()) {
|
||||
Err(Error::CoroutineInactive) => {}
|
||||
Err(_) => panic!("resuming dead coroutine error is not CoroutineInactive kind"),
|
||||
_ => panic!("resuming dead coroutine did not return error"),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn coroutine_from_closure() {
|
||||
let lua = Lua::new();
|
||||
let thrd_main = lua.create_function(|_, ()| Ok(())).unwrap();
|
||||
lua.globals().set("main", thrd_main).unwrap();
|
||||
let thrd: Thread = lua.eval("coroutine.create(main)", None).unwrap();
|
||||
thrd.resume::<_, ()>(()).unwrap();
|
||||
}
|
||||
|
||||
#[test]
|
||||
#[should_panic]
|
||||
fn coroutine_panic() {
|
||||
let lua = Lua::new();
|
||||
let thrd_main = lua.create_function(|lua, ()| {
|
||||
// whoops, 'main' has a wrong type
|
||||
let _coro: u32 = lua.globals().get("main").unwrap();
|
||||
Ok(())
|
||||
}).unwrap();
|
||||
lua.globals().set("main", thrd_main.clone()).unwrap();
|
||||
let thrd: Thread = lua.create_thread(thrd_main).unwrap();
|
||||
thrd.resume::<_, ()>(()).unwrap();
|
||||
}
|
||||
}
|
|
@ -49,7 +49,8 @@ impl<'lua> Drop for LuaRef<'lua> {
|
|||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::LightUserData;
|
||||
use lua::{Function, Lua};
|
||||
use function::Function;
|
||||
use lua::Lua;
|
||||
|
||||
use std::os::raw::c_void;
|
||||
|
||||
|
|
|
@ -392,7 +392,8 @@ mod tests {
|
|||
use super::{MetaMethod, UserData, UserDataMethods};
|
||||
use error::ExternalError;
|
||||
use string::String;
|
||||
use lua::{Function, Lua};
|
||||
use function::Function;
|
||||
use lua::Lua;
|
||||
|
||||
#[test]
|
||||
fn test_user_data() {
|
||||
|
|
|
@ -204,9 +204,7 @@ pub unsafe fn pop_error(state: *mut ffi::lua_State, err_code: c_int) -> Error {
|
|||
eprintln!("impossible Lua allocation error, aborting!");
|
||||
process::abort()
|
||||
}
|
||||
ffi::LUA_ERRGCMM => {
|
||||
Error::GarbageCollectorError(err_string)
|
||||
}
|
||||
ffi::LUA_ERRGCMM => Error::GarbageCollectorError(err_string),
|
||||
_ => lua_panic!(state, "internal error: unrecognized lua error code"),
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue