Fix clippy warnings

build/find_normal.rs

@@ -70,7 +70,7 @@ pub fn probe_lua() -> Option<PathBuf> {
                 .probe(alt_probe);
         }
 
-        lua.expect(&format!("cannot find Lua {} using `pkg-config`", ver))
+        lua.unwrap_or_else(|_| panic!("cannot find Lua {} using `pkg-config`", ver))
             .include_paths
             .get(0)
             .cloned()

src/ffi/lua51/compat.rs

@@ -110,10 +110,10 @@ unsafe fn compat53_pushglobalfuncname(L: *mut lua_State, ar: *mut lua_Debug) ->
     if compat53_findfield(L, top + 1, 2) != 0 {
         lua_copy(L, -1, top + 1); // move name to proper place
         lua_pop(L, 2); // remove pushed values
-        return 1;
+        1
     } else {
         lua_settop(L, top); // remove function and global table
-        return 0;
+        0
     }
 }
 

src/ffi/luau/compat.rs

@@ -2,7 +2,6 @@
 //!
 //! Based on github.com/keplerproject/lua-compat-5.3
 
-use std::convert::TryInto;
 use std::ffi::CStr;
 use std::mem;
 use std::os::raw::{c_char, c_int, c_void};
@@ -51,7 +50,7 @@ unsafe fn compat53_findfield(L: *mut lua_State, objidx: c_int, level: c_int) ->
         }
         lua_pop(L, 1); // remove value
     }
-    return 0; // not found
+    0 // not found
 }
 
 unsafe fn compat53_pushglobalfuncname(
@@ -66,10 +65,10 @@ unsafe fn compat53_pushglobalfuncname(
     if compat53_findfield(L, top + 1, 2) != 0 {
         lua_copy(L, -1, top + 1); // move name to proper place
         lua_pop(L, 2); // remove pushed values
-        return 1;
+        1
     } else {
         lua_settop(L, top); // remove function and global table
-        return 0;
+        0
     }
 }
 
@@ -77,13 +76,11 @@ unsafe fn compat53_pushfuncname(L: *mut lua_State, level: c_int, ar: *mut lua_De
     if !(*ar).name.is_null() {
         // is there a name?
         lua_pushfstring(L, cstr!("function '%s'"), (*ar).name);
+    } else if compat53_pushglobalfuncname(L, level, ar) != 0 {
+        lua_pushfstring(L, cstr!("function '%s'"), lua_tostring(L, -1));
+        lua_remove(L, -2); // remove name
     } else {
-        if compat53_pushglobalfuncname(L, level, ar) != 0 {
-            lua_pushfstring(L, cstr!("function '%s'"), lua_tostring(L, -1));
-            lua_remove(L, -2); // remove name
-        } else {
-            lua_pushliteral(L, "?");
-        }
+        lua_pushliteral(L, "?");
     }
 }
 
@@ -177,7 +174,6 @@ pub unsafe fn lua_geti(L: *mut lua_State, mut idx: c_int, n: lua_Integer) -> c_i
 
 #[inline(always)]
 pub unsafe fn lua_rawgeti(L: *mut lua_State, idx: c_int, n: lua_Integer) -> c_int {
-    let n = n.try_into().expect("cannot convert index to lua_Integer");
     lua_rawgeti_(L, idx, n)
 }
 
@@ -213,7 +209,6 @@ pub unsafe fn lua_seti(L: *mut lua_State, mut idx: c_int, n: lua_Integer) {
 
 #[inline(always)]
 pub unsafe fn lua_rawseti(L: *mut lua_State, idx: c_int, n: lua_Integer) {
-    let n = n.try_into().expect("cannot convert index from lua_Integer");
     lua_rawseti_(L, idx, n)
 }
 
@@ -366,10 +361,8 @@ pub unsafe fn luaL_loadbufferx(
         if !ok {
             return LUA_ERRSYNTAX;
         }
-    } else {
-        if luau_load(L, name, data, size, 0) != 0 {
-            return LUA_ERRSYNTAX;
-        }
+    } else if luau_load(L, name, data, size, 0) != 0 {
+        return LUA_ERRSYNTAX;
     }
     LUA_OK
 }

src/lua.rs

@@ -1351,7 +1351,7 @@ impl Lua {
     {
         let func = RefCell::new(func);
         self.create_function(move |lua, args| {
-            (&mut *func
+            (*func
                 .try_borrow_mut()
                 .map_err(|_| Error::RecursiveMutCallback)?)(lua, args)
         })
@@ -2613,12 +2613,12 @@ impl Lua {
             match option.to_str() {
                 Ok("collect") => {
                     ffi::lua_gc(state, ffi::LUA_GCCOLLECT, 0);
-                    return 0;
+                    0
                 }
                 Ok("count") => {
                     let n = ffi::lua_gc(state, ffi::LUA_GCCOUNT, 0);
                     ffi::lua_pushnumber(state, n as ffi::lua_Number);
-                    return 1;
+                    1
                 }
                 // TODO: More variants
                 _ => ffi::luaL_error(
@@ -2629,7 +2629,7 @@ impl Lua {
         }
 
         fn lua_require(lua: &Lua, name: Option<std::string::String>) -> Result<Value> {
-            let name = name.ok_or(Error::RuntimeError("name is nil".into()))?;
+            let name = name.ok_or_else(|| Error::RuntimeError("name is nil".into()))?;
 
             // Find module in the cache
             let loaded = unsafe {
@@ -2651,8 +2651,8 @@ impl Lua {
             }
 
             let mut source = None;
-            for path in search_path.split(";") {
-                if let Ok(buf) = std::fs::read(path.replacen("?", &name, 1)) {
+            for path in search_path.split(';') {
+                if let Ok(buf) = std::fs::read(path.replacen('?', &name, 1)) {
                     source = Some(buf);
                     break;
                 }

src/scope.rs

@@ -103,7 +103,7 @@ impl<'lua, 'scope> Scope<'lua, 'scope> {
     {
         let func = RefCell::new(func);
         self.create_function(move |lua, args| {
-            (&mut *func
+            (*func
                 .try_borrow_mut()
                 .map_err(|_| Error::RecursiveMutCallback)?)(lua, args)
         })
@@ -306,7 +306,7 @@ impl<'lua, 'scope> Scope<'lua, 'scope> {
                         let mut data = data
                             .try_borrow_mut()
                             .map_err(|_| Error::UserDataBorrowMutError)?;
-                        (&mut *method)(lua, &mut *data, args)
+                        (*method)(lua, &mut *data, args)
                     });
                     unsafe { scope.create_callback(f) }
                 }
@@ -314,7 +314,7 @@ impl<'lua, 'scope> Scope<'lua, 'scope> {
                 NonStaticMethod::FunctionMut(function) => {
                     let function = RefCell::new(function);
                     let f = Box::new(move |lua, args| {
-                        (&mut *function
+                        (*function
                             .try_borrow_mut()
                             .map_err(|_| Error::RecursiveMutCallback)?)(
                             lua, args