Remove remaining usages of arg_check!

Close RustPython#1714

Author: limeburst

vm/src/builtins.rs

@@ -716,11 +716,13 @@ fn builtin_setattr(
 // builtin_slice
 
 fn builtin_sorted(vm: &VirtualMachine, mut args: PyFuncArgs) -> PyResult {
-    arg_check!(vm, args, required = [(iterable, None)]);
-    let items = vm.extract_elements(iterable)?;
+    let iterable = args.take_positional();
+    if iterable.is_none() {
+        return Err(vm.new_type_error("sorted expected 1 arguments, got 0".to_string()));
+    }
+    let items = vm.extract_elements(&iterable.unwrap())?;
     let lst = vm.ctx.new_list(items);
 
-    args.shift();
     vm.call_method(&lst, "sort", args)?;
     Ok(lst)
 }

vm/src/macros.rs

@@ -1,106 +1,3 @@
-// count number of tokens given as arguments.
-// see: https://danielkeep.github.io/tlborm/book/blk-counting.html
-#[macro_export]
-macro_rules! replace_expr {
-    ($_t:tt $sub:expr) => {
-        $sub
-    };
-}
-
-#[macro_export]
-macro_rules! count_tts {
-    ($($tts:tt)*) => {0usize $(+ $crate::replace_expr!($tts 1usize))*};
-}
-
-#[macro_export]
-macro_rules! type_check {
-    ($vm:ident, $args:ident, $arg_count:ident, $arg_name:ident, $arg_type:expr) => {
-        // None indicates that we have no type requirement (i.e. we accept any type)
-        if let Some(expected_type) = $arg_type {
-            let arg = &$args.args[$arg_count];
-
-            if !$crate::obj::objtype::isinstance(arg, &expected_type) {
-                use $crate::pyobject::TypeProtocol;
-
-                let arg_typ = arg.class();
-                let expected_type_name = $vm.to_pystr(&expected_type)?;
-                let actual_type = $vm.to_pystr(&arg_typ)?;
-                return Err($vm.new_type_error(format!(
-                    "argument of type {} is required for parameter {} ({}) (got: {})",
-                    expected_type_name,
-                    $arg_count + 1,
-                    stringify!($arg_name),
-                    actual_type
-                )));
-            }
-        }
-    };
-}
-
-#[macro_export]
-macro_rules! arg_check {
-    ( $vm: ident, $args:ident ) => {
-        // Zero-arg case
-        if $args.args.len() != 0 {
-            return Err($vm.new_type_error(format!(
-                "Expected no arguments (got: {})", $args.args.len())));
-        }
-    };
-    ( $vm: ident, $args:ident, required=[$( ($arg_name:ident, $arg_type:expr) ),*] ) => {
-        $crate::arg_check!($vm, $args, required=[$( ($arg_name, $arg_type) ),*], optional=[]);
-    };
-    ( $vm: ident, $args:ident, required=[$( ($arg_name:ident, $arg_type:expr) ),*], optional=[$( ($optional_arg_name:ident, $optional_arg_type:expr) ),*] ) => {
-        let mut arg_count = 0;
-
-        // use macro magic to compile-time count number of required and optional arguments
-        let minimum_arg_count = $crate::count_tts!($($arg_name)*);
-        let maximum_arg_count = minimum_arg_count + $crate::count_tts!($($optional_arg_name)*);
-
-        // verify that the number of given arguments is right
-        if $args.args.len() < minimum_arg_count || $args.args.len() > maximum_arg_count {
-            let expected_str = if minimum_arg_count == maximum_arg_count {
-                format!("{}", minimum_arg_count)
-            } else {
-                format!("{}-{}", minimum_arg_count, maximum_arg_count)
-            };
-            return Err($vm.new_type_error(format!(
-                "Expected {} arguments (got: {})",
-                expected_str,
-                $args.args.len()
-            )));
-        };
-
-        // for each required parameter:
-        //  check if the type matches. If not, return with error
-        //  assign the arg to a variable
-        $(
-            $crate::type_check!($vm, $args, arg_count, $arg_name, $arg_type);
-            let $arg_name = &$args.args[arg_count];
-            #[allow(unused_assignments)]
-            {
-                arg_count += 1;
-            }
-        )*
-
-        // for each optional parameter, if there are enough positional arguments:
-        //  check if the type matches. If not, return with error
-        //  assign the arg to a variable
-        $(
-            let $optional_arg_name = if arg_count < $args.args.len() {
-                $crate::type_check!($vm, $args, arg_count, $optional_arg_name, $optional_arg_type);
-                let ret = Some(&$args.args[arg_count]);
-                #[allow(unused_assignments)]
-                {
-                    arg_count += 1;
-                }
-                ret
-            } else {
-                None
-            };
-        )*
-    };
-}
-
 #[macro_export]
 macro_rules! no_kwargs {
     ( $vm: ident, $args:ident ) => {

vm/src/obj/objbool.rs

@@ -150,18 +150,28 @@ impl PyBool {
     }
 
     #[pyslot]
-    fn tp_new(vm: &VirtualMachine, args: PyFuncArgs) -> PyResult {
-        arg_check!(
-            vm,
-            args,
-            required = [(_zelf, Some(vm.ctx.type_type()))],
-            optional = [(val, None)]
-        );
-        let value = match val {
-            Some(val) => boolval(vm, val.clone())?,
-            None => false,
-        };
-        Ok(vm.new_bool(value))
+    fn tp_new(vm: &VirtualMachine, mut args: PyFuncArgs) -> PyResult {
+        let zelf = &args.shift();
+        if !objtype::isinstance(&zelf, &vm.ctx.type_type()) {
+            let zelf_typ = zelf.class();
+            let actual_type = vm.to_pystr(&zelf_typ)?;
+            return Err(vm.new_type_error(format!(
+                "requires a 'type' object but received a '{}'",
+                actual_type
+            )));
+        }
+        if args.args.len() > 1 {
+            Err(vm.new_type_error(format!(
+                "bool expected at most 1 arguments, got {}",
+                args.args.len()
+            )))
+        } else {
+            let value = match args.take_positional() {
+                Some(val) => boolval(vm, val.clone())?,
+                None => false,
+            };
+            Ok(vm.new_bool(value))
+        }
     }
 }