Merge pull request #8 from ImaMapleTree/feature/release-0.2.3-default…

…-all

Added default(all) and split crate into multiple features

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "derive-ctor"
-version = "0.2.2"
-description = "Adds `#[derive(ctor)]` which allows for the auto-generation of a constructor."
+version = "0.2.3"
+description = "Adds `#[derive(ctor)]` which allows for the auto-generation of struct and enum constructors."
 keywords = ["derive", "macro", "trait", "procedural", "no_std"]
 authors = ["Evan Cowin"]
 license = "MIT"
@@ -10,11 +10,16 @@ edition = "2021"
 exclude = [".github/*", ".gitignore"]
 categories = ["no-std", "rust-patterns"]
 
+[features]
+default = ["structs", "enums"]
+enums = ["dep:heck"]
+structs = []
+
 [lib]
 proc-macro = true
 
 [dependencies]
 syn = { version = "2.0.*" }
 quote = { version = "1.*" }
 proc-macro2 = { version = "1.0.*" }
-heck = { version = "0.5.*" }
+heck = { version = "0.5.*", optional = true }

README.md

@@ -25,7 +25,7 @@ Add `derive-ctor` to your `Cargo.toml`:
 
 ```toml
 [dependencies]
-derive-ctor = "0.2.2"
+derive-ctor = "0.2.3"
 ```
 
 Annotate your struct with `#[derive(ctor)]` to automatically generate a `new` constructor:
@@ -68,13 +68,14 @@ let my_struct3 = MyStruct::internal(300, "C".to_string());
 ```
 
 ### Auto-implement "Default" Trait
-The `Default` trait can be auto implemented by specifying a ctor with the name "Default" in the ctor attribute. Note: all fields must have a generated value in order for the implementation to be valid.
+The `Default` trait can be auto implemented by specifying a ctor with the name `default` in the ctor attribute. Note: all fields must have a generated value in order for the implementation to be valid.
+Additionally, declaring `default(all)` will automatically mark all non-annotated fields with `#[ctor(default)]`
 
 ```rust
 use derive_ctor::ctor;
 
 #[derive(ctor)]
-#[ctor(Default)]
+#[ctor(default)]
 struct MyStruct {
     #[ctor(default)]
     field1: i32,
@@ -83,6 +84,17 @@ struct MyStruct {
 }
 
 let default: MyStruct = Default::default();
+
+
+#[derive(ctor)]
+#[ctor(default(all))]
+struct OtherStruct {
+    field1: i32,
+    #[ctor(expr(true))]
+    field2: bool
+}
+
+let default2: OtherStruct = Default::default();
 ```
 
 ## Enum Configurations

src/constants.rs

@@ -0,0 +1,31 @@
+// while redundant this file exists as a possible user-reference to discover all possible properties
+// available to them for a certain element
+
+
+// error messages
+pub(crate) const CONFIG_PROP_ERR_MSG: &str =
+    "Unexpected property: \"{prop}\" (must be one of the following: \"{values}\")";
+pub(crate) const DEFAULT_CTOR_ERR_MSG: &str =
+    "Default constructor requires field to generate its own value.";
+
+pub(crate) const CTOR_WORD: &str = "ctor";
+
+// valid field properties
+pub(crate) const FIELD_PROP_CLONED: &str = "cloned";
+pub(crate) const FIELD_PROP_DEFAULT: &str = "default";
+pub(crate) const FIELD_PROP_EXPR: &str = "expr";
+pub(crate) const FIELD_PROP_INTO: &str = "into";
+pub(crate) const FIELD_PROP_ITER: &str = "iter";
+
+// valid enum-config properties
+pub(crate) const ENUM_PROP_PREFIX: &str = "prefix";
+pub(crate) const ENUM_PROP_VISIBILITY: &str = "visibility";
+pub(crate) const ENUM_PROP_VIS: &str = "vis";
+
+// variation property
+pub(crate) const ENUM_VARIATION_PROP_NONE: &str = "none";
+
+// struct config properties
+pub(crate) const STRUCT_PROP_DEFAULT: &str = "default";
+// property used within the default() prop
+pub(crate) const NESTED_PROP_ALL: &str = "all";