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post expansion pass

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This commit is contained in:
NikVolf 2016-06-30 14:34:49 +03:00
parent ff29c82c9e
commit 86c85bdd9e
1 changed files with 28 additions and 0 deletions
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28
ipc/codegen/src/lib.rs
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@ -50,11 +50,37 @@ include!("lib.rs.in");
#[cfg(feature = "with-syntex")]
pub fn register(reg: &mut syntex::Registry) {
/// 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 == &"ipc" => { return None; }
_ => {}
}
Some(attr)
}
fn fold_mac(&mut self, mac: ast::Mac) -> ast::Mac {
fold::noop_fold_mac(mac, self)
}
}
fold::Folder::fold_crate(&mut StripAttributeFolder, krate)
}
reg.add_attr("feature(custom_derive)");
reg.add_attr("feature(custom_attribute)");
reg.add_decorator("derive_Ipc", codegen::expand_ipc_implementation);
reg.add_decorator("derive_Binary", serialization::expand_serialization_implementation);
reg.add_post_expansion_pass(strip_attributes);
}
#[cfg(not(feature = "with-syntex"))]
@ -67,4 +93,6 @@ pub fn register(reg: &mut rustc_plugin::Registry) {
syntax::parse::token::intern("derive_Binary"),
syntax::ext::base::MultiDecorator(
Box::new(serialization::expand_serialization_implementation)));
reg.register_attribute("ipc".to_owned(), AttributeType::Normal);
}