Merge pull request #530 from serde-rs/derive

Macros 1.1

serde_codegen/src/lib.rs

@@ -36,51 +36,67 @@ include!(concat!(env!("OUT_DIR"), "/lib.rs"));
 include!("lib.rs.in");
 
 #[cfg(feature = "with-syntex")]
-pub fn expand<S, D>(src: S, dst: D) -> Result<(), syntex::Error>
-    where S: AsRef<Path>,
-          D: AsRef<Path>,
-{
-    let src = src.as_ref().to_owned();
-    let dst = dst.as_ref().to_owned();
-
-    let expand_thread = move || {
-        use syntax::{ast, fold};
-
-        /// Strip the serde attributes from the crate.
-        #[cfg(feature = "with-syntex")]
-        fn strip_attributes(krate: ast::Crate) -> ast::Crate {
-            /// Helper folder that strips the serde attributes after the extensions have been expanded.
-            struct StripAttributeFolder;
-
-            impl fold::Folder for StripAttributeFolder {
-                fn fold_attribute(&mut self, attr: ast::Attribute) -> Option<ast::Attribute> {
-                    match attr.node.value.node {
-                        ast::MetaItemKind::List(ref n, _) if n == &"serde" => { return None; }
-                        _ => {}
-                    }
-
-                    Some(attr)
+fn syntex_registry() -> syntex::Registry {
+    use syntax::{ast, fold};
+
+    /// Strip the serde attributes from the crate.
+    #[cfg(feature = "with-syntex")]
+    fn strip_attributes(krate: ast::Crate) -> ast::Crate {
+        /// Helper folder that strips the serde attributes after the extensions have been expanded.
+        struct StripAttributeFolder;
+
+        impl fold::Folder for StripAttributeFolder {
+            fn fold_attribute(&mut self, attr: ast::Attribute) -> Option<ast::Attribute> {
+                match attr.node.value.node {
+                    ast::MetaItemKind::List(ref n, _) if n == &"serde" => { return None; }
+                    _ => {}
                 }
 
-                fn fold_mac(&mut self, mac: ast::Mac) -> ast::Mac {
-                    fold::noop_fold_mac(mac, self)
-                }
+                Some(attr)
             }
 
-            fold::Folder::fold_crate(&mut StripAttributeFolder, krate)
+            fn fold_mac(&mut self, mac: ast::Mac) -> ast::Mac {
+                fold::noop_fold_mac(mac, self)
+            }
         }
 
-        let mut reg = syntex::Registry::new();
+        fold::Folder::fold_crate(&mut StripAttributeFolder, krate)
+    }
+
+    let mut reg = syntex::Registry::new();
+
+    reg.add_attr("feature(custom_derive)");
+    reg.add_attr("feature(custom_attribute)");
+
+    reg.add_decorator("derive_Serialize", ser::expand_derive_serialize);
+    reg.add_decorator("derive_Deserialize", de::expand_derive_deserialize);
+
+    reg.add_post_expansion_pass(strip_attributes);
+
+    reg
+}
 
-        reg.add_attr("feature(custom_derive)");
-        reg.add_attr("feature(custom_attribute)");
+#[cfg(feature = "with-syntex")]
+pub fn expand_str(src: &str) -> Result<String, syntex::Error> {
+    let src = src.to_owned();
 
-        reg.add_decorator("derive_Serialize", ser::expand_derive_serialize);
-        reg.add_decorator("derive_Deserialize", de::expand_derive_deserialize);
+    let expand_thread = move || {
+        syntex_registry().expand_str("", "", &src)
+    };
 
-        reg.add_post_expansion_pass(strip_attributes);
+    syntex::with_extra_stack(expand_thread)
+}
 
-        reg.expand("", src, dst)
+#[cfg(feature = "with-syntex")]
+pub fn expand<S, D>(src: S, dst: D) -> Result<(), syntex::Error>
+    where S: AsRef<Path>,
+          D: AsRef<Path>,
+{
+    let src = src.as_ref().to_owned();
+    let dst = dst.as_ref().to_owned();
+
+    let expand_thread = move || {
+        syntex_registry().expand("", src, dst)
     };
 
     syntex::with_extra_stack(expand_thread)

serde_derive/Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "serde_derive"
+version = "0.8.5"
+authors = ["Erick Tryzelaar <erick.tryzelaar@gmail.com>"]
+license = "MIT/Apache-2.0"
+description = "Macros 1.1 implementation of #[derive(Serialize, Deserialize)]"
+homepage = "https://serde.rs"
+repository = "https://github.com/serde-rs/serde"
+documentation = "https://serde.rs/codegen.html"
+keywords = ["serde", "serialization"]
+include = ["Cargo.toml", "src/**/*.rs"]
+
+[lib]
+name = "serde_derive"
+rustc-macro = true
+
+[dependencies]
+serde_codegen = { version = "=0.8.5", path = "../serde_codegen" }
+
+[dev-dependencies]
+fnv = "1.0"
+serde = { version = "0.8.5", path = "../serde" }
+serde_test = { version = "0.8.5", path = "../serde_test" }

serde_derive/src/lib.rs

@@ -0,0 +1,21 @@
+#![feature(rustc_macro, rustc_macro_lib)]
+#![cfg(not(test))]
+
+extern crate rustc_macro;
+extern crate serde_codegen;
+
+use rustc_macro::TokenStream;
+
+#[rustc_macro_derive(Serialize)]
+pub fn derive_serialize(input: TokenStream) -> TokenStream {
+    let item = format!("#[derive(Serialize)]\n{}", input);
+    let expanded = serde_codegen::expand_str(&item).unwrap();
+    expanded.parse().unwrap()
+}
+
+#[rustc_macro_derive(Deserialize)]
+pub fn derive_deserialize(input: TokenStream) -> TokenStream {
+    let item = format!("#[derive(Deserialize)]\n{}", input);
+    let expanded = serde_codegen::expand_str(&item).unwrap();
+    expanded.parse().unwrap()
+}

serde_derive/tests/test.rs

@@ -0,0 +1,8 @@
+#![feature(test, rustc_macro, rustc_attrs)]
+
+#[macro_use]
+extern crate serde_derive;
+
+extern crate test;
+
+include!("../../testing/tests/test.rs.in");