81 lines
2.3 KiB
Rust
81 lines
2.3 KiB
Rust
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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#[cfg(feature = "with-syntex")]
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pub mod inner {
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use syntex;
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use codegen;
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use syntax::{ast, fold};
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use std::env;
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use std::path::Path;
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fn strip_attributes(krate: ast::Crate) -> ast::Crate {
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/// Helper folder that strips the serde attributes after the extensions have been expanded.
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struct StripAttributeFolder;
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impl fold::Folder for StripAttributeFolder {
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fn fold_attribute(&mut self, attr: ast::Attribute) -> Option<ast::Attribute> {
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if &*attr.value.name.as_str() == "webapp" {
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return None;
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}
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Some(attr)
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}
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fn fold_mac(&mut self, mac: ast::Mac) -> ast::Mac {
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fold::noop_fold_mac(mac, self)
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}
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}
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fold::Folder::fold_crate(&mut StripAttributeFolder, krate)
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}
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pub fn register(reg: &mut syntex::Registry) {
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reg.add_attr("feature(custom_derive)");
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reg.add_attr("feature(custom_attribute)");
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reg.add_decorator("derive_WebAppFiles", codegen::expand_webapp_implementation);
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reg.add_post_expansion_pass(strip_attributes);
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}
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pub fn generate() {
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let out_dir = env::var_os("OUT_DIR").unwrap();
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let mut registry = syntex::Registry::new();
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register(&mut registry);
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let src = Path::new("src/lib.rs.in");
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let dst = Path::new(&out_dir).join("lib.rs");
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registry.expand("", &src, &dst).unwrap();
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}
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}
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#[cfg(not(feature = "with-syntex"))]
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pub mod inner {
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use codegen;
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pub fn register(reg: &mut rustc_plugin::Registry) {
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reg.register_syntax_extension(
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syntax::parse::token::intern("derive_WebAppFiles"),
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syntax::ext::base::MultiDecorator(
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Box::new(codegen::expand_webapp_implementation)));
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reg.register_attribute("webapp".to_owned(), AttributeType::Normal);
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}
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pub fn generate() {}
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}
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