From 2054845649b0342f8ad31d76b561ebf77678a13f Mon Sep 17 00:00:00 2001
From: Sam Johnson <sam@durosoft.com>
Date: Wed, 5 Jul 2023 09:56:56 -0400
Subject: [PATCH] working

---
 .gitignore     |  2 ++
 Cargo.toml     | 13 +++++++++++++
 src/lib.rs     | 17 +++++++++++++++++
 tests/tests.rs | 15 +++++++++++++++
 4 files changed, 47 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.toml
 create mode 100644 src/lib.rs
 create mode 100644 tests/tests.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4fffb2f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target
+/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..65d905c
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "pub-fields"
+version = "0.1.0"
+edition = "2021"
+authors = ["sam0x17"]
+description = "Provides a proc macro attribute that defaults all struct fields to public unless private is prepended."
+
+[lib]
+proc-macro = true
+
+[dependencies]
+syn = { version = "2", features = ["full"]}
+quote = "1"
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..59cdb14
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,17 @@
+use proc_macro::TokenStream;
+use quote::ToTokens;
+use syn::{parse::Nothing, parse_macro_input, parse_quote, ItemStruct};
+
+#[proc_macro_attribute]
+pub fn pub_fields(attr: TokenStream, tokens: TokenStream) -> TokenStream {
+    parse_macro_input!(attr as Nothing);
+    let mut item_struct = parse_macro_input!(tokens as ItemStruct);
+    for field in &mut item_struct.fields {
+        field.vis = match &field.vis {
+            syn::Visibility::Public(p) => syn::Visibility::Public(*p),
+            syn::Visibility::Restricted(res) => syn::Visibility::Restricted(res.clone()),
+            syn::Visibility::Inherited => parse_quote!(pub),
+        };
+    }
+    item_struct.to_token_stream().into()
+}
diff --git a/tests/tests.rs b/tests/tests.rs
new file mode 100644
index 0000000..21d837d
--- /dev/null
+++ b/tests/tests.rs
@@ -0,0 +1,15 @@
+mod submod {
+    use pub_fields::pub_fields;
+
+    #[pub_fields]
+    pub struct MyStruct {
+        a: usize,
+        b: usize,
+        c: usize,
+    }
+}
+
+#[test]
+fn test_it() {
+    let x = submod::MyStruct { a: 3, b: 4, c: 5 };
+}