From e619345766e98578929061e566178010c171df48 Mon Sep 17 00:00:00 2001
From: Dirkjan Ochtman <dirkjan@ochtman.nl>
Date: Thu, 22 Dec 2016 13:49:53 +0100
Subject: [PATCH] Initial stab at macros 1.1

---
 .gitignore                  |  2 ++
 Cargo.toml                  |  2 ++
 askama/Cargo.toml           |  8 ++++++++
 askama/src/lib.rs           | 26 ++++++++++++++++++++++++++
 askama_codegen/Cargo.toml   | 11 +++++++++++
 askama_codegen/src/lib.rs   | 31 +++++++++++++++++++++++++++++++
 askama_test/Cargo.toml      |  9 +++++++++
 askama_test/tests/simple.rs | 18 ++++++++++++++++++
 8 files changed, 107 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.toml
 create mode 100644 askama/Cargo.toml
 create mode 100644 askama/src/lib.rs
 create mode 100644 askama_codegen/Cargo.toml
 create mode 100644 askama_codegen/src/lib.rs
 create mode 100644 askama_test/Cargo.toml
 create mode 100644 askama_test/tests/simple.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..a9d37c560
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+target
+Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 000000000..3f15138ad
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,2 @@
+[workspace]
+members = ["askama", "askama_codegen", "askama_test"]
diff --git a/askama/Cargo.toml b/askama/Cargo.toml
new file mode 100644
index 000000000..4cbfbe117
--- /dev/null
+++ b/askama/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "askama"
+version = "0.1.0"
+authors = ["Dirkjan Ochtman <dirkjan@ochtman.nl>"]
+workspace = ".."
+
+[dependencies]
+askama_codegen = { path = "../askama_codegen" }
diff --git a/askama/src/lib.rs b/askama/src/lib.rs
new file mode 100644
index 000000000..93b785476
--- /dev/null
+++ b/askama/src/lib.rs
@@ -0,0 +1,26 @@
+#![feature(proc_macro)]
+
+#[macro_use]
+extern crate askama_codegen;
+
+pub trait Template {
+    fn render(&self) -> String;
+}
+
+#[cfg(test)]
+mod tests {
+
+    extern crate askama;
+
+    #[derive(Template)]
+    struct TestTemplate {
+        var: String,
+    }
+
+    #[test]
+    fn it_works() {
+        let s = TestTemplate { var: "foo".to_string() }.render();
+        assert_eq!(s, "hello world, foo");
+    }
+
+}
diff --git a/askama_codegen/Cargo.toml b/askama_codegen/Cargo.toml
new file mode 100644
index 000000000..29043aa99
--- /dev/null
+++ b/askama_codegen/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "askama_codegen"
+version = "0.1.0"
+authors = ["Dirkjan Ochtman <dirkjan@ochtman.nl>"]
+
+[dependencies]
+syn = "0.10"
+quote = "0.3"
+
+[lib]
+proc-macro = true
diff --git a/askama_codegen/src/lib.rs b/askama_codegen/src/lib.rs
new file mode 100644
index 000000000..6d7170ebe
--- /dev/null
+++ b/askama_codegen/src/lib.rs
@@ -0,0 +1,31 @@
+#![feature(proc_macro, proc_macro_lib)]
+
+extern crate proc_macro;
+#[macro_use]
+extern crate quote;
+extern crate syn;
+
+use proc_macro::TokenStream;
+
+#[proc_macro_derive(Template, attributes(template))]
+pub fn derive_template(input: TokenStream) -> TokenStream {
+    let source = input.to_string();
+
+    let ast = syn::parse_macro_input(&source).unwrap();
+    let _ctx = match ast.body {
+        syn::Body::Struct(ref data) => data,
+        _ => panic!("#[derive(Template)] can only be used with structs"),
+    };
+
+    let name = &ast.ident;
+    let (impl_generics, ty_generics, where_clause) = ast.generics.split_for_impl();
+    let expanded = quote! {
+        impl #impl_generics askama::Template for #name #ty_generics #where_clause {
+             fn render(&self) -> String {
+                 "hello world, bar".to_string()
+             }
+        }
+    };
+
+    expanded.parse().unwrap()
+}
diff --git a/askama_test/Cargo.toml b/askama_test/Cargo.toml
new file mode 100644
index 000000000..8d01793f5
--- /dev/null
+++ b/askama_test/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "askama_test"
+version = "0.1.0"
+authors = ["Dirkjan Ochtman <dirkjan@ochtman.nl>"]
+workspace = ".."
+
+[dependencies]
+askama_codegen = { path = "../askama_codegen" }
+askama = { path = "../askama" }
diff --git a/askama_test/tests/simple.rs b/askama_test/tests/simple.rs
new file mode 100644
index 000000000..f7beb806a
--- /dev/null
+++ b/askama_test/tests/simple.rs
@@ -0,0 +1,18 @@
+#![feature(proc_macro)]
+
+#[macro_use]
+extern crate askama_codegen;
+extern crate askama;
+
+use askama::Template;
+
+#[derive(Template)]
+struct TestTemplate {
+    var: String,
+}
+
+#[test]
+fn it_works() {
+    let s = TestTemplate { var: "foo".to_string() }.render();
+    assert_eq!(s, "hello world, foo");
+}