Version 1.3 (#4)

* feat: add custom builder name support

- Add `#[builder(builder_name = "...")]` attribute to customize builder name

- Keep default naming convention `{StructName}Builder`

- Add test cases

* update version

* update readme

* rename into name

Author: tomoikey

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "typesafe_builder"
-version = "1.2.0"
+version = "1.3.0"
 edition = "2024"
 authors = ["tomoikey"]
 readme = "README.md"
@@ -10,4 +10,4 @@ license = "MIT"
 description = "A procedural macro to generate type-safe builder patterns for Rust structs"
 
 [dependencies]
-typesafe_builder_derive = "1.2.0"
+typesafe_builder_derive = "1.3.0"

README.md

@@ -217,6 +217,24 @@ let db = DatabaseBuilder::new()
     .build();
 ```
 
+### 5️⃣ **Custom Builder Name**
+
+```rust
+use typesafe_builder::*;
+
+#[derive(Builder)]
+#[builder(name = "MyCustomBuilder")]  // Customize the builder name
+struct User {
+    #[builder(required)]
+    name: String,
+}
+
+// Use the customized builder name
+let user = MyCustomBuilder::new()
+    .with_name("Alice".to_string())
+    .build();
+```
+
 ## 🔧 Error Handling
 
 ### Compile-Time Error Examples

typesafe_builder_derive/Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "typesafe_builder_derive"
-version = "1.2.0"
+version = "1.3.0"
 edition = "2024"
 authors = ["tomoikey"]
 readme = "README.md"
@@ -13,10 +13,10 @@ description = "A procedural macro to generate type-safe builder patterns for Rus
 proc-macro = true
 
 [dependencies]
-syn = { version = "2", features = ["derive", "parsing", "proc-macro"] }
-quote = "1"
-darling = "0.20"
-proc-macro2 = "1"
+darling = "0.20.11"
+proc-macro2 = "1.0.95"
+syn = { version = "2.0.101", features = ["derive", "parsing", "proc-macro"] }
+quote = "1.0.40"
 
 [dev-dependencies]
 trybuild = "1.0.105"

typesafe_builder_derive/Cargo.toml

@@ -217,6 +217,24 @@ let db = DatabaseBuilder::new()
     .build();
 ```
 
+### 5️⃣ **Custom Builder Name**
+
+```rust
+use typesafe_builder::*;
+
+#[derive(Builder)]
+#[builder(name = "MyCustomBuilder")]  // Customize the builder name
+struct User {
+    #[builder(required)]
+    name: String,
+}
+
+// Use the customized builder name
+let user = MyCustomBuilder::new()
+    .with_name("Alice".to_string())
+    .build();
+```
+
 ## 🔧 Error Handling
 
 ### Compile-Time Error Examples

typesafe_builder_derive/README.md

@@ -14,7 +14,7 @@ use validate_condition::validate_condition_fields;
 
 pub fn derive_builder_impl(input: Input) -> Result<TokenStream2, darling::Error> {
     let name = input.ident();
-    let builder_name = Ident::new(&format!("{}Builder", name), name.span());
+    let builder_name = Ident::new(&input.builder_name(), name.span());
     let generics = input.generics();
 
     let field_infos = extract_field_infos(&input)?;

typesafe_builder_derive/src/derive_builder.rs

@@ -7,6 +7,8 @@ pub struct Input {
     ident: Ident,
     generics: Generics,
     data: darling::ast::Data<(), InputField>,
+    #[darling(rename = "name")]
+    builder_name: Option<String>,
 }
 
 impl Input {
@@ -21,6 +23,12 @@ impl Input {
     pub fn data(&self) -> darling::ast::Data<&(), &InputField> {
         self.data.as_ref()
     }
+
+    pub fn builder_name(&self) -> String {
+        self.builder_name
+            .clone()
+            .unwrap_or_else(|| format!("{}Builder", self.ident))
+    }
 }
 
 #[derive(Debug, FromField)]

typesafe_builder_derive/src/input.rs

@@ -191,3 +191,17 @@ fn generic_struct_where_clause_success() {
         .build();
     assert_eq!(container.value, "hello");
 }
+
+#[test]
+fn custom_builder_name_success() {
+    #[derive(Builder, PartialEq)]
+    #[builder(name = "MyCustomBuilder")]
+    struct User {
+        #[builder(required)]
+        name: String,
+    }
+    let user = MyCustomBuilder::new()
+        .with_name("Alice".to_string())
+        .build();
+    assert_eq!(user.name, "Alice");
+}