chore: make all constable fn to const fn.

Signed-off-by: Yu Li <[email protected]>

motore/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "motore"
-version = "0.4.1"
+version = "0.4.2"
 edition = "2021"
 description = """
 Motore is a library of modular and reusable components for building robust

motore/src/builder.rs

@@ -23,7 +23,7 @@ impl Default for ServiceBuilder<Identity> {
 
 impl ServiceBuilder<Identity> {
     /// Create a new [`ServiceBuilder`].
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
         ServiceBuilder {
             layer: Identity::new(),
         }

motore/src/layer/ext/map_err.rs

@@ -5,7 +5,7 @@ pub struct MapErrLayer<F> {
 }
 
 impl<F> MapErrLayer<F> {
-    pub fn new(f: F) -> Self {
+    pub const fn new(f: F) -> Self {
         MapErrLayer { f }
     }
 }

motore/src/layer/identity.rs

@@ -13,7 +13,7 @@ pub struct Identity {
 
 impl Identity {
     /// Create a new `Identity` value
-    pub fn new() -> Identity {
+    pub const fn new() -> Identity {
         Identity { _p: () }
     }
 }

motore/src/layer/layer_fn.rs

@@ -63,7 +63,7 @@ use super::Layer;
 /// let wrapped_service = log_layer.layer(uppercase_service);
 /// ```
 /// [`Service`]: crate::Service
-pub fn layer_fn<F>(f: F) -> LayerFn<F> {
+pub const fn layer_fn<F>(f: F) -> LayerFn<F> {
     LayerFn { f }
 }
 

motore/src/layer/layers.rs

@@ -11,7 +11,7 @@ impl Default for Layers<Identity> {
 }
 
 impl<L> Layers<L> {
-    pub fn new(layer: L) -> Self {
+    pub const fn new(layer: L) -> Self {
         Layers(layer)
     }
 

motore/src/layer/stack.rs

@@ -11,7 +11,7 @@ pub struct Stack<Inner, Outer> {
 
 impl<Inner, Outer> Stack<Inner, Outer> {
     /// Create a new `Stack`.
-    pub fn new(inner: Inner, outer: Outer) -> Self {
+    pub const fn new(inner: Inner, outer: Outer) -> Self {
         Stack { inner, outer }
     }
 }

motore/src/layer/tower_adapter.rs

@@ -26,7 +26,7 @@ pub struct TowerAdapterLayer<F, Cx, MotoreReq> {
 }
 
 impl<F, Cx, MotoreReq> TowerAdapterLayer<F, Cx, MotoreReq> {
-    pub fn new(f: F) -> Self {
+    pub const fn new(f: F) -> Self {
         Self {
             f,
             _phantom: PhantomData,

motore/src/service/tower_adapter.rs

@@ -53,7 +53,7 @@ pub struct Tower<S, F, Cx, MotoreReq> {
 }
 
 impl<S, F, Cx, MotoreReq> Tower<S, F, Cx, MotoreReq> {
-    pub fn new(inner: S, f: F) -> Self {
+    pub const fn new(inner: S, f: F) -> Self {
         Self {
             inner,
             f,
@@ -162,7 +162,7 @@ pub struct Motore<S, F> {
 }
 
 impl<S, F> Motore<S, F> {
-    pub fn new(inner: S, f: F) -> Self {
+    pub const fn new(inner: S, f: F) -> Self {
         Self { inner, f }
     }
 }

motore/src/timeout.rs

@@ -13,7 +13,7 @@ pub struct Timeout<S> {
 }
 
 impl<S> Timeout<S> {
-    pub fn new(inner: S, duration: Option<Duration>) -> Self {
+    pub const fn new(inner: S, duration: Option<Duration>) -> Self {
         Self { inner, duration }
     }
 }
@@ -51,7 +51,7 @@ pub struct TimeoutLayer {
 }
 
 impl TimeoutLayer {
-    pub fn new(duration: Option<Duration>) -> Self {
+    pub const fn new(duration: Option<Duration>) -> Self {
         TimeoutLayer { duration }
     }
 }