feat(getset-kinds): add set_borrow and set_own

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "gset"
-version = "1.0.5"
+version = "1.1.0"
 authors = ["Andrew Sonin <sonin.cel@yandex.ru>"]
 description = "A procedural macro for generating the most basic getters and setters on fields."
 categories = ["development-tools::procedural-macro-helpers"]

README.md

@@ -67,8 +67,8 @@ struct Struct<T>(
 
 All field attributes have the following named parameters:
 - `name` — name of the method being inferred.
-Must be a valid Rust [identifier](https://docs.rs/syn/1.0.109/syn/struct.Ident.html).
-This is a required parameter for tuple structs.
+  Must be a valid Rust [identifier](https://docs.rs/syn/1.0.109/syn/struct.Ident.html).
+  This is a required parameter for tuple structs.
 - `vis` — visibility of the method being inferred.
   Must be a valid Rust [visibility modifier](https://docs.rs/syn/1.0.109/syn/enum.Visibility.html).
   Visibility is `private` by default.
@@ -477,4 +477,78 @@ impl Struct {
         self.a = value
     }
 }
+```
+
+### 11. `set_borrow`
+
+Derives a borrowing setter for a field.
+
+#### Parameters
+- `name` — name of the resulting method. If not set, it will be named as `set_field`.
+- `vis` — visibility of the resulting method. If not set, it will be private.
+
+#### Example
+
+```rust
+use gset::Getset;
+
+#[derive(Getset)]
+struct Struct {
+    /// Doc comment.
+    #[getset(set_borrow, vis = "pub")]
+    a: f64,
+}
+```
+will expand into
+```rust
+struct Struct {
+    /// Doc comment.
+    a: f64,
+}
+
+impl Struct {
+    /// Doc comment.
+    #[inline]
+    pub fn set_a(&mut self, value: f64) -> &mut Self {
+        self.a = value;
+        self
+    }
+}
+```
+
+### 12. `set_own`
+
+Derives an owning setter for a field.
+
+#### Parameters
+- `name` — name of the resulting method. If not set, it will be named as `set_field`.
+- `vis` — visibility of the resulting method. If not set, it will be private.
+
+#### Example
+
+```rust
+use gset::Getset;
+
+#[derive(Getset)]
+struct Struct {
+    /// Doc comment.
+    #[getset(set_own, vis = "pub")]
+    a: f64,
+}
+```
+will expand into
+```rust
+struct Struct {
+    /// Doc comment.
+    a: f64,
+}
+
+impl Struct {
+    /// Doc comment.
+    #[inline]
+    pub fn set_a(mut self, value: f64) -> Self {
+        self.a = value;
+        self
+    }
+}
 ```

src/field_attribute_layout.rs

@@ -229,6 +229,22 @@ impl AttributeLayout {
                     get_ty_override().unwrap_or_else(|| quote! { () }),
                 )
             }
+            AttributeKind::SetBorrowed => {
+                let fn_name = setter_fn_name();
+                (
+                    quote! { #fn_name(&mut self, value: #field_type) },
+                    quote! { self.#field_ident_or_idx = value; self },
+                    get_ty_override().unwrap_or_else(|| quote! { &mut Self }),
+                )
+            }
+            AttributeKind::SetOwned => {
+                let fn_name = setter_fn_name();
+                (
+                    quote! { #fn_name(mut self, value: #field_type) },
+                    quote! { self.#field_ident_or_idx = value; self },
+                    get_ty_override().unwrap_or_else(|| quote! { Self }),
+                )
+            }
         };
         quote! {
             #visibility fn #signature -> #ty {

src/field_attributes.rs

@@ -68,6 +68,8 @@ define_field_attributes!(
         GetAsRef      => "get_as_ref",
         GetAsDeref    => "get_as_deref",
         GetAsDerefMut => "get_as_deref_mut",
-        Set           => "set"
+        Set           => "set",
+        SetBorrowed   => "set_borrow",
+        SetOwned      => "set_own"
     }
 );

tests/getset.rs

@@ -8,7 +8,7 @@ use std::{
 };
 
 #[derive(Getset)]
-struct Struct1<T, M: Default>
+struct Struct1<'a, T, M: Default>
 where
     T: Debug,
 {
@@ -43,6 +43,12 @@ where
         ty = "Option<&mut f64>"
     )]
     field_5: Option<F64>,
+
+    /// Field 6.
+    #[getset(set, name = "set_field_6")]
+    #[getset(set_borrow, name = "set_field_6_borrow")]
+    #[getset(set_own, name = "set_field_6_own")]
+    field_6: &'a f64,
 }
 
 #[derive(Getset)]