lay groundwork for models

2 files changed, 40 insertions, 0 deletions

diff --git a/tosin-macros/Cargo.toml b/tosin-macros/Cargo.toml
new file mode 100644
index 0000000..4a58a20
--- /dev/null
+++ b/tosin-macros/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "tosin-macros"
+version = "0.1.0"
+authors = ["Melody Horn / boringcactus <melody@boringcactus.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+proc-macro = true
+
+[dependencies]
+syn = "1.0"
+quote = "1.0"
diff --git a/tosin-macros/src/lib.rs b/tosin-macros/src/lib.rs
new file mode 100644
index 0000000..c0651fa
--- /dev/null
+++ b/tosin-macros/src/lib.rs
@@ -0,0 +1,26 @@
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+use quote::quote;
+
+#[proc_macro_derive(Model, attributes(model))]
+pub fn model_derive(input: TokenStream) -> TokenStream {
+    // Construct a representation of Rust code as a syntax tree
+    // that we can manipulate
+    let ast = syn::parse(input).unwrap();
+
+    // Build the trait implementation
+    impl_model(&ast)
+}
+
+fn impl_model(ast: &syn::DeriveInput) -> TokenStream {
+    let name = &ast.ident;
+    let gen = quote! {
+        impl #name {
+            fn hello_macro() {
+                println!("Hello, Macro! My name is {}!", stringify!(#name));
+            }
+        }
+    };
+    gen.into()
+}