use syntax::attr;
use syntax::feature_gate::{AttributeGate, AttributeType, Stability, deprecated_attributes};
use syntax_pos::Span;
+use syntax::symbol::keywords;
use rustc::hir::{self, PatKind};
use rustc::hir::intravisit::FnKind;
}
}
+declare_lint! {
+ pub ANONYMOUS_PARAMETERS,
+ Allow,
+ "detects anonymous parameters"
+}
+
+/// Checks for use of anonymous parameters (RFC 1685)
+#[derive(Clone)]
+pub struct AnonymousParameters;
+
+impl LintPass for AnonymousParameters {
+ fn get_lints(&self) -> LintArray {
+ lint_array!(ANONYMOUS_PARAMETERS)
+ }
+}
+
+impl EarlyLintPass for AnonymousParameters {
+ fn check_trait_item(&mut self, cx: &EarlyContext, it: &ast::TraitItem) {
+ match it.node {
+ ast::TraitItemKind::Method(ref sig, _) => {
+ for arg in sig.decl.inputs.iter() {
+ match arg.pat.node {
+ ast::PatKind::Ident(_, ident, None) => {
+ if ident.node.name == keywords::Invalid.name() {
+ cx.span_lint(ANONYMOUS_PARAMETERS,
+ arg.pat.span,
+ "use of deprecated anonymous parameter");
+ }
+ }
+ _ => (),
+ }
+ }
+ },
+ _ => (),
+ }
+ }
+}
+
declare_lint! {
DEPRECATED_ATTR,
Warn,
add_early_builtin!(sess,
UnusedParens,
UnusedImportBraces,
+ AnonymousParameters,
);
add_early_builtin_with_new!(sess,
id: LintId::of(MISSING_FRAGMENT_SPECIFIER),
reference: "issue #40107 <https://github.com/rust-lang/rust/issues/40107>",
},
+ FutureIncompatibleInfo {
+ id: LintId::of(ANONYMOUS_PARAMETERS),
+ reference: "issue #41686 <https://github.com/rust-lang/rust/issues/41686>",
+ },
]);
// Register renamed and removed lints
--- /dev/null
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![forbid(anonymous_parameters)]
+// Test for the anonymous_parameters deprecation lint (RFC 1685)
+
+trait T {
+ fn foo(i32); //~ ERROR use of deprecated anonymous parameter
+ //~| WARNING hard error
+
+ fn bar_with_default_impl(String, String) {}
+ //~^ ERROR use of deprecated anonymous parameter
+ //~| WARNING hard error
+ //~| ERROR use of deprecated anonymous parameter
+ //~| WARNING hard error
+}
+
+fn main() {}