service_builder_macro/
lib.rs

1//! Procedural macros for the service-builder crate.
2//!
3//! This crate provides the implementation of the `builder` attribute macro,
4//! which generates builder pattern code along with optional getters and setters.
5
6use proc_macro::TokenStream;
7use syn::{parse_macro_input, DeriveInput};
8
9mod builder;
10mod field_attributes;
11
12/// Implements the builder pattern for a struct, with optional getter and setter methods.
13///
14/// # Field Attributes
15///
16/// - `#[builder(getter)]`: Generates a getter method for the field
17/// - `#[builder(setter)]`: Generates a setter method for the field
18/// - `#[builder(getter, setter)]`: Generates both getter and setter methods
19///
20/// # Example
21///
22/// ```rust
23/// use service_builder::builder;
24///
25/// #[builder]
26/// struct Service {
27///     #[builder(getter)]
28///     name: String,
29///     #[builder(setter)]
30///     count: i32,
31///     #[builder(getter, setter)]
32///     enabled: bool,
33/// }
34///
35/// let mut service = Service::builder()
36///     .name("test".to_string())
37///     .count(42)
38///     .enabled(true)
39///     .build()
40///     .unwrap();
41///
42/// // Use generated getter
43/// assert_eq!(service.get_name(), &"test".to_string());
44///
45/// // Use generated setter
46/// service.set_count(100);
47/// service.set_enabled(false);
48/// ```
49#[proc_macro_attribute]
50pub fn builder(_attr: TokenStream, item: TokenStream) -> TokenStream {
51    let input = parse_macro_input!(item as DeriveInput);
52    match builder::expand_builder(input) {
53        Ok(expanded) => expanded.into(),
54        Err(err) => err.to_compile_error().into(),
55    }
56}
service_builder_macro/lib.rs

service_builder_macro/
lib.rs
