src/test/ui-fulldeps/auxiliary/lint-for-crate-rpass.rs

   1 // force-host
   2
   3 #![feature(plugin_registrar, rustc_private)]
   4 #![feature(box_syntax)]
   5
   6 extern crate rustc_driver;
   7 extern crate rustc_hir;
   8 extern crate rustc_lint;
   9 extern crate rustc_span;
  10 #[macro_use]
  11 extern crate rustc_session;
  12 extern crate rustc_ast;
  13
  14 use rustc_ast::attr;
  15 use rustc_driver::plugin::Registry;
  16 use rustc_lint::{LateContext, LateLintPass, LintContext, LintPass};
  17 use rustc_span::symbol::Symbol;
  18
  19 macro_rules! fake_lint_pass {
  20     ($struct:ident, $($attr:expr),*) => {
  21         struct $struct;
  22
  23         impl LintPass for $struct {
  24             fn name(&self) -> &'static str {
  25                 stringify!($struct)
  26             }
  27         }
  28
  29         impl LateLintPass<'_> for $struct {
  30             fn check_crate(&mut self, cx: &LateContext, krate: &rustc_hir::Crate) {
  31                 let attrs = cx.tcx.hir().attrs(rustc_hir::CRATE_HIR_ID);
  32                 $(
  33                     if !cx.sess().contains_name(attrs, $attr) {
  34                         cx.lint(CRATE_NOT_OKAY, |lint| {
  35                              let msg = format!("crate is not marked with #![{}]", $attr);
  36                              lint.build(&msg).set_span(krate.item.span).emit()
  37                         });
  38                     }
  39                 )*
  40             }
  41         }
  42
  43     }
  44 }
  45
  46 declare_lint!(CRATE_NOT_OKAY, Warn, "crate not marked with #![crate_okay]");
  47 declare_lint!(CRATE_NOT_RED, Warn, "crate not marked with #![crate_red]");
  48 declare_lint!(CRATE_NOT_BLUE, Warn, "crate not marked with #![crate_blue]");
  49 declare_lint!(CRATE_NOT_GREY, Warn, "crate not marked with #![crate_grey]");
  50 declare_lint!(CRATE_NOT_GREEN, Warn, "crate not marked with #![crate_green]");
  51
  52 fake_lint_pass! {
  53     PassOkay,
  54     Symbol::intern("crate_okay")
  55 }
  56
  57 fake_lint_pass! {
  58     PassRedBlue,
  59     Symbol::intern("crate_red"), Symbol::intern("crate_blue")
  60 }
  61
  62 fake_lint_pass! {
  63     PassGreyGreen,
  64     Symbol::intern("crate_grey"), Symbol::intern("crate_green")
  65 }
  66
  67 #[plugin_registrar]
  68 pub fn plugin_registrar(reg: &mut Registry) {
  69     reg.lint_store.register_lints(&[
  70         &CRATE_NOT_OKAY,
  71         &CRATE_NOT_RED,
  72         &CRATE_NOT_BLUE,
  73         &CRATE_NOT_GREY,
  74         &CRATE_NOT_GREEN,
  75     ]);
  76     reg.lint_store.register_late_pass(|| box PassOkay);
  77     reg.lint_store.register_late_pass(|| box PassRedBlue);
  78     reg.lint_store.register_late_pass(|| box PassGreyGreen);
  79 }