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#![feature(plugin, rustc_private)]
#![crate_type = "dylib"]
extern crate rustc_ast_pretty;
extern crate rustc_driver;
extern crate rustc_hir;
extern crate rustc_lint;
#[macro_use]
extern crate rustc_session;
extern crate rustc_ast;
extern crate rustc_span;
use rustc_ast_pretty::pprust;
use rustc_driver::plugin::Registry;
use rustc_hir as hir;
use rustc_hir::intravisit;
use rustc_hir::Node;
use rustc_lint::{LateContext, LateLintPass, LintContext};
use rustc_span::source_map;
#[no_mangle]
fn __rustc_plugin_registrar(reg: &mut Registry) {
reg.lint_store.register_lints(&[&MISSING_ALLOWED_ATTR]);
reg.lint_store.register_late_pass(|| Box::new(MissingAllowedAttrPass));
}
declare_lint! {
MISSING_ALLOWED_ATTR,
Deny,
"Checks for missing `allowed_attr` attribute"
}
declare_lint_pass!(MissingAllowedAttrPass => [MISSING_ALLOWED_ATTR]);
impl<'tcx> LateLintPass<'tcx> for MissingAllowedAttrPass {
fn check_fn(
&mut self,
cx: &LateContext<'tcx>,
_: intravisit::FnKind<'tcx>,
_: &'tcx hir::FnDecl,
_: &'tcx hir::Body,
span: source_map::Span,
id: hir::HirId,
) {
let item = match cx.tcx.hir().get(id) {
Node::Item(item) => item,
_ => cx.tcx.hir().expect_item(cx.tcx.hir().get_parent_item(id)),
};
let allowed = |attr| pprust::attribute_to_string(attr).contains("allowed_attr");
if !cx.tcx.hir().attrs(item.hir_id()).iter().any(allowed) {
cx.lint(MISSING_ALLOWED_ATTR, |lint| {
lint.build("Missing 'allowed_attr' attribute").set_span(span).emit();
});
}
}
}
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