Inline project methods

See taiki-e/pin-project-lite@59f83eb for the context.

Author: taiki-e

CHANGELOG.md

@@ -10,6 +10,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+- Inline project methods.
+
 ## [1.1.1] - 2023-06-29
 
 - Fix build error from dependency when built with `-Z minimal-versions`.

pin-project-internal/src/pin_project/derive.rs

@@ -944,6 +944,7 @@ fn make_proj_impl(
 
     let mut project = Some(quote! {
         #allow_dead_code
+        #[inline]
         #vis fn project<#lifetime>(
             self: _pin_project::__private::Pin<&#lifetime mut Self>,
         ) -> #proj_ident #proj_ty_generics {
@@ -955,6 +956,7 @@ fn make_proj_impl(
     let mut project_ref = Some(quote! {
         #allow_dead_code
         #[allow(clippy::missing_const_for_fn)]
+        #[inline]
         #vis fn project_ref<#lifetime>(
             self: _pin_project::__private::Pin<&#lifetime Self>,
         ) -> #proj_ref_ident #proj_ty_generics {
@@ -967,6 +969,7 @@ fn make_proj_impl(
         // It is enough to only set the span of the signature.
         let sig = quote_spanned! { span =>
             #allow_dead_code
+            #[inline]
             #vis fn project_replace(
                 self: _pin_project::__private::Pin<&mut Self>,
                 __replacement: Self,

tests/expand/default/enum.expanded.rs

@@ -67,6 +67,7 @@ const _: () = {
     extern crate pin_project as _pin_project;
     impl<T, U> Enum<T, U> {
         #[allow(dead_code)]
+        #[inline]
         fn project<'pin>(
             self: _pin_project::__private::Pin<&'pin mut Self>,
         ) -> EnumProj<'pin, T, U> {
@@ -90,6 +91,7 @@ const _: () = {
         }
         #[allow(dead_code)]
         #[allow(clippy::missing_const_for_fn)]
+        #[inline]
         fn project_ref<'pin>(
             self: _pin_project::__private::Pin<&'pin Self>,
         ) -> EnumProjRef<'pin, T, U> {

tests/expand/default/struct.expanded.rs

@@ -42,6 +42,7 @@ const _: () = {
     }
     impl<T, U> Struct<T, U> {
         #[allow(dead_code)]
+        #[inline]
         fn project<'pin>(
             self: _pin_project::__private::Pin<&'pin mut Self>,
         ) -> __StructProjection<'pin, T, U> {
@@ -55,6 +56,7 @@ const _: () = {
         }
         #[allow(dead_code)]
         #[allow(clippy::missing_const_for_fn)]
+        #[inline]
         fn project_ref<'pin>(
             self: _pin_project::__private::Pin<&'pin Self>,
         ) -> __StructProjectionRef<'pin, T, U> {

tests/expand/default/tuple_struct.expanded.rs

@@ -36,6 +36,7 @@ const _: () = {
         TupleStruct<T, U>: 'pin;
     impl<T, U> TupleStruct<T, U> {
         #[allow(dead_code)]
+        #[inline]
         fn project<'pin>(
             self: _pin_project::__private::Pin<&'pin mut Self>,
         ) -> __TupleStructProjection<'pin, T, U> {
@@ -49,6 +50,7 @@ const _: () = {
         }
         #[allow(dead_code)]
         #[allow(clippy::missing_const_for_fn)]
+        #[inline]
         fn project_ref<'pin>(
             self: _pin_project::__private::Pin<&'pin Self>,
         ) -> __TupleStructProjectionRef<'pin, T, U> {

tests/expand/multifields/enum.expanded.rs

@@ -118,6 +118,7 @@ const _: () = {
     extern crate pin_project as _pin_project;
     impl<T, U> Enum<T, U> {
         #[allow(dead_code)]
+        #[inline]
         fn project<'pin>(
             self: _pin_project::__private::Pin<&'pin mut Self>,
         ) -> EnumProj<'pin, T, U> {
@@ -149,6 +150,7 @@ const _: () = {
         }
         #[allow(dead_code)]
         #[allow(clippy::missing_const_for_fn)]
+        #[inline]
         fn project_ref<'pin>(
             self: _pin_project::__private::Pin<&'pin Self>,
         ) -> EnumProjRef<'pin, T, U> {
@@ -179,6 +181,7 @@ const _: () = {
             }
         }
         #[allow(dead_code)]
+        #[inline]
         fn project_replace(
             self: _pin_project::__private::Pin<&mut Self>,
             __replacement: Self,

tests/expand/multifields/struct.expanded.rs

@@ -56,6 +56,7 @@ const _: () = {
     }
     impl<T, U> Struct<T, U> {
         #[allow(dead_code)]
+        #[inline]
         fn project<'pin>(
             self: _pin_project::__private::Pin<&'pin mut Self>,
         ) -> __StructProjection<'pin, T, U> {
@@ -72,6 +73,7 @@ const _: () = {
         }
         #[allow(dead_code)]
         #[allow(clippy::missing_const_for_fn)]
+        #[inline]
         fn project_ref<'pin>(
             self: _pin_project::__private::Pin<&'pin Self>,
         ) -> __StructProjectionRef<'pin, T, U> {
@@ -86,6 +88,7 @@ const _: () = {
             }
         }
         #[allow(dead_code)]
+        #[inline]
         fn project_replace(
             self: _pin_project::__private::Pin<&mut Self>,
             __replacement: Self,

tests/expand/multifields/tuple_struct.expanded.rs

@@ -47,6 +47,7 @@ const _: () = {
     );
     impl<T, U> TupleStruct<T, U> {
         #[allow(dead_code)]
+        #[inline]
         fn project<'pin>(
             self: _pin_project::__private::Pin<&'pin mut Self>,
         ) -> __TupleStructProjection<'pin, T, U> {
@@ -62,6 +63,7 @@ const _: () = {
         }
         #[allow(dead_code)]
         #[allow(clippy::missing_const_for_fn)]
+        #[inline]
         fn project_ref<'pin>(
             self: _pin_project::__private::Pin<&'pin Self>,
         ) -> __TupleStructProjectionRef<'pin, T, U> {
@@ -76,6 +78,7 @@ const _: () = {
             }
         }
         #[allow(dead_code)]
+        #[inline]
         fn project_replace(
             self: _pin_project::__private::Pin<&mut Self>,
             __replacement: Self,

tests/expand/naming/enum-all.expanded.rs

@@ -85,6 +85,7 @@ const _: () = {
     extern crate pin_project as _pin_project;
     impl<T, U> Enum<T, U> {
         #[allow(dead_code)]
+        #[inline]
         fn project<'pin>(
             self: _pin_project::__private::Pin<&'pin mut Self>,
         ) -> Proj<'pin, T, U> {
@@ -105,6 +106,7 @@ const _: () = {
         }
         #[allow(dead_code)]
         #[allow(clippy::missing_const_for_fn)]
+        #[inline]
         fn project_ref<'pin>(
             self: _pin_project::__private::Pin<&'pin Self>,
         ) -> ProjRef<'pin, T, U> {
@@ -127,6 +129,7 @@ const _: () = {
             }
         }
         #[allow(dead_code)]
+        #[inline]
         fn project_replace(
             self: _pin_project::__private::Pin<&mut Self>,
             __replacement: Self,

tests/expand/naming/enum-mut.expanded.rs

@@ -47,6 +47,7 @@ const _: () = {
     extern crate pin_project as _pin_project;
     impl<T, U> Enum<T, U> {
         #[allow(dead_code)]
+        #[inline]
         fn project<'pin>(
             self: _pin_project::__private::Pin<&'pin mut Self>,
         ) -> Proj<'pin, T, U> {