From c48271aef7e6b0819c497f302127c161845a83d7 Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Sat, 18 Mar 2023 17:14:42 +0100
Subject: refactor: rewrite the mock macro as a procedural macro

---
 src/lib.rs | 229 +------------------------------------------------------------
 1 file changed, 3 insertions(+), 226 deletions(-)

(limited to 'src')

diff --git a/src/lib.rs b/src/lib.rs
index c4868a2..45aea03 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,196 +1,10 @@
-#[macro_export]
-macro_rules! mock {
-    (
-        $mock: ident;
+#![deny(clippy::all, clippy::pedantic)]
 
-        impl $mocked_trait: ident for $mocked_trait_target: ident {
-            $(
-                fn $func: ident$(<
-                    $($type_param: tt$(: ($($type_param_bound: tt +)+))?),*
-                >)?(
-                    self: ($($self_type: tt)+),
-                    $($func_param: ident: $func_param_type: ty),*
-                )$( -> $return_type: ty)?
-                $(where $(
-                    $where_param: ident: $first_where_param_bound: tt $(+ $where_param_bound: tt)*
-                ),*)?;
-            )*
-        }
-    ) => {
-        $crate::__private::paste! {
-        mod [<__ $mock>] {
-        use super::*;
-
-        pub struct $mock {
-            $(
-                [<$func _expectations>]: std::collections::HashMap<
-                    Vec<$crate::__private::type_id::TypeID>,
-                    [<$mock Expectation _ $func>]$(<$($crate::__to_unit!($type_param)),*>)?
-                >,
-            )*
-        }
-
-        impl $mock
-        {
-            pub fn new() -> Self
-            {
-                Self {
-                    $(
-                        [<$func _expectations>]: std::collections::HashMap::new()
-                    ),*
-                }
-            }
-
-            $(
-                #[allow(unused)]
-                pub(crate) fn [<expect_ $func>]$(<
-                    $($type_param$(: $($type_param_bound +)*)?),*
-                >)?(&mut self)
-                    -> &mut [<$mock Expectation _ $func>]$(<$($type_param),*>)?
-                $(where $(
-                    $where_param: $first_where_param_bound $(+ $where_param_bound)*
-                ),*)?
-                {
-                    let ids = vec![
-                        $($($crate::__private::type_id::TypeID::of::<$type_param>()),*)?
-                    ];
-
-                    let expectation =
-                        [<$mock Expectation _ $func>]$(::<$($type_param),*>)?::new()
-                            .strip_type_params();
-
-                    self.[<$func _expectations>].insert(ids.clone(), expectation);
-
-                    self.[<$func _expectations>]
-                        .get_mut(&ids)
-                        .unwrap()
-                        .with_type_params_mut()
-                }
-            )*
-        }
-
-        impl $mocked_trait for $mock {
-            $(
-                fn $func$(<$($type_param$(: $($type_param_bound +)+)?),*>)?(
-                    self: $($self_type)+,
-                    $($func_param: $func_param_type),*
-                )$( -> $return_type)?
-                $(where $(
-                    $where_param: $first_where_param_bound $(+ $where_param_bound)*
-                ),*)?
-                {
-                    let ids = vec![
-                        $($($crate::__private::type_id::TypeID::of::<$type_param>()),*)?
-                    ];
-
-                    let expectation = self
-                        .[<$func _expectations>]
-                        .get(&ids)
-                        .expect(concat!(
-                            "No expectation found for function ",
-                            stringify!($func)
-                        ))
-                        .with_type_params$(::<$($type_param),*>)?();
-
-                    let Some(returning) = &expectation.returning else {
-                        panic!(concat!(
-                            "Expectation for function",
-                            stringify!($func),
-                            " is missing a function to call")
-                        );
-                    };
-
-                    returning(self, $($func_param),*)
-                }
-            )*
-        }
-
-        $(
-            #[allow(non_camel_case_types, non_snake_case)]
-            pub struct [<$mock Expectation _ $func>]$(<$($type_param),*>)? {
-                returning: Option<
-                    fn(
-                        $crate::__replace_ref_type!($($self_type)*, $mock),
-                        $($func_param_type),*
-                    )$( -> $return_type)?>,
-
-                $(
-                    $([<$type_param _phantom>]: std::marker::PhantomData<$type_param>,)*
-                )?
-            }
-
-            impl$(<$($type_param),*>)? [<$mock Expectation _ $func>]$(<
-                $($type_param),*
-            >)? {
-                #[allow(unused)]
-                fn new() -> Self {
-                    Self {
-                        returning: None,
-                        $(
-                            $([<$type_param _phantom>]: std::marker::PhantomData,)*
-                        )?
-                    }
-                }
-
-                #[allow(unused)]
-                pub fn returning(
-                    &mut self,
-                    func: fn(
-                        $crate::__replace_ref_type!($($self_type)*, $mock),
-                        $($func_param_type),*
-                    )$( -> $return_type)?
-                ) -> &mut Self
-                {
-                    self.returning = Some(func);
-
-                    self
-                }
-
-                #[allow(unused)]
-                fn strip_type_params(
-                    self,
-                ) -> [<$mock Expectation _ $func>]$(<$($crate::__to_unit!($type_param)),*>)?
-                {
-                    $crate::__if_empty_else!(($($($type_param)*)?); {
-                        // No type parameters are present
-                        self
-                    }, {
-                        // Type parameters are present
-                        unsafe { std::mem::transmute(self) }
-                    })
-
-                }
-            }
-
-            impl [<$mock Expectation _ $func>]$(<$($crate::__to_unit!($type_param)),*>)? {
-                fn with_type_params$(<$($type_param),*>)?(
-                    &self,
-                ) -> &[<$mock Expectation _ $func>]$(<$($type_param),*>)?
-                {
-                    unsafe { &*(self as *const Self).cast() }
-                }
-
-                #[allow(unused)]
-                fn with_type_params_mut$(<$($type_param),*>)?(
-                    &mut self,
-                ) -> &mut [<$mock Expectation _ $func>]$(<$($type_param),*>)?
-                {
-                    unsafe { &mut *(self as *mut Self).cast() }
-                }
-            }
-        )*
-        }
-
-        use [<__ $mock>]::$mock;
-        }
-    };
-}
+pub use ridicule_macros::mock;
 
 #[doc(hidden)]
 pub mod __private
 {
-    pub use paste::paste;
-
     pub mod type_id
     {
         #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
@@ -202,6 +16,7 @@ pub mod __private
         impl TypeID
         {
             #[inline]
+            #[must_use]
             pub fn of<T>() -> Self
             {
                 Self {
@@ -210,42 +25,4 @@ pub mod __private
             }
         }
     }
-
-    #[macro_export]
-    #[doc(hidden)]
-    macro_rules! __to_unit {
-        ($anything: tt) => {
-            ()
-        };
-    }
-
-    #[macro_export]
-    #[doc(hidden)]
-    macro_rules! __replace_ref_type {
-        (&$old_type: tt, $new_type: tt) => {
-            &$new_type
-        };
-
-        (&mut $old_type: tt, $new_type: tt) => {
-            &mut $new_type
-        };
-    }
-
-    #[macro_export]
-    #[doc(hidden)]
-    macro_rules! __if_empty_else {
-        (($($input: tt)*); $if_empty: block, $else: block) => {
-            $crate::__if_empty_else!(@($($input)*); $if_empty, $else)
-        };
-
-        // Empty
-        (@(); $if_empty: block, $else: block) => {
-            $if_empty
-        };
-
-        // Not empty
-        (@($($input: tt)+); $if_empty: block, $else: block) => {
-            $else
-        };
-    }
 }
-- 
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