lua: import from core over std where possible

crates/luajit/src/error.rs

@@ -1,4 +1,4 @@
-use std::ffi::c_int;
+use core::ffi::c_int;
 
 use thiserror::Error as ThisError;
 

crates/luajit/src/ffi.rs

@@ -1,7 +1,7 @@
 #![allow(non_snake_case)]
 
-use std::ffi::{c_char, c_double, c_int, c_void};
-use std::marker::{PhantomData, PhantomPinned};
+use core::ffi::{c_char, c_double, c_int, c_void};
+use core::marker::{PhantomData, PhantomPinned};
 
 #[repr(C)]
 pub struct State {

crates/luajit/src/function.rs

@@ -1,7 +1,7 @@
-use std::error::Error;
-use std::ffi::{c_int, CStr};
-use std::mem;
-use std::ptr;
+use core::error::Error;
+use core::ffi::{c_int, CStr};
+use core::mem;
+use core::ptr;
 
 use crate::ffi::{self, State};
 use crate::{utils, IntoResult, Poppable, Pushable};

crates/luajit/src/macros.rs

@@ -1,4 +1,4 @@
-use std::ffi::c_char;
+use core::ffi::c_char;
 
 use crate::ffi::*;
 

crates/luajit/src/poppable.rs

@@ -1,5 +1,5 @@
+use core::hash::Hash;
 use std::collections::HashMap;
-use std::hash::Hash;
 
 use crate::ffi::*;
 use crate::macros::count;

crates/luajit/src/pushable.rs

@@ -1,4 +1,4 @@
-use std::ffi::{c_char, c_int};
+use core::ffi::{c_char, c_int};
 
 use crate::ffi::{self, Integer, Number, State};
 use crate::macros::count;

crates/luajit/src/utils.rs

@@ -1,5 +1,5 @@
-use std::ffi::{c_int, CStr};
-use std::fmt::Display;
+use core::ffi::{c_int, CStr};
+use core::fmt::Display;
 
 use crate::ffi::{self, State};