"detects missing fragment specifiers in unused `macro_rules!` patterns"
}
+declare_lint! {
+ pub PARENTHESIZED_PARAMS_IN_TYPES_AND_MODULES,
+ Warn,
+ "detects parenthesized generic parameters in type and module names"
+}
+
declare_lint! {
pub DEPRECATED,
Warn,
LEGACY_IMPORTS,
LEGACY_CONSTRUCTOR_VISIBILITY,
MISSING_FRAGMENT_SPECIFIER,
+ PARENTHESIZED_PARAMS_IN_TYPES_AND_MODULES,
DEPRECATED
)
}
id: LintId::of(MISSING_FRAGMENT_SPECIFIER),
reference: "issue #40107 <https://github.com/rust-lang/rust/issues/40107>",
},
+ FutureIncompatibleInfo {
+ id: LintId::of(PARENTHESIZED_PARAMS_IN_TYPES_AND_MODULES),
+ reference: "issue #42238 <https://github.com/rust-lang/rust/issues/42238>",
+ },
FutureIncompatibleInfo {
id: LintId::of(ANONYMOUS_PARAMETERS),
reference: "issue #41686 <https://github.com/rust-lang/rust/issues/41686>",
use rustc::traits;
use rustc::ty::{self, Ty, TyCtxt, ToPredicate, TypeFoldable};
use rustc::ty::wf::object_region_bounds;
+use rustc::lint::builtin::PARENTHESIZED_PARAMS_IN_TYPES_AND_MODULES;
use rustc_back::slice;
use require_c_abi_if_variadic;
use util::common::{ErrorReported, FN_OUTPUT_NAME};
match item_segment.parameters {
hir::AngleBracketedParameters(_) => {}
hir::ParenthesizedParameters(..) => {
- self.prohibit_parenthesized_params(item_segment);
+ self.prohibit_parenthesized_params(item_segment, true);
return Substs::for_item(tcx, def_id, |_, _| {
tcx.types.re_static
pub fn prohibit_type_params(&self, segments: &[hir::PathSegment]) {
for segment in segments {
if let hir::ParenthesizedParameters(_) = segment.parameters {
- self.prohibit_parenthesized_params(segment);
+ self.prohibit_parenthesized_params(segment, false);
break;
}
for typ in segment.parameters.types() {
}
}
- pub fn prohibit_parenthesized_params(&self, segment: &hir::PathSegment) {
+ pub fn prohibit_parenthesized_params(&self, segment: &hir::PathSegment, emit_error: bool) {
if let hir::ParenthesizedParameters(ref data) = segment.parameters {
- struct_span_err!(self.tcx().sess, data.span, E0214,
- "parenthesized parameters may only be used with a trait")
- .span_label(data.span, "only traits may use parentheses")
- .emit();
+ if emit_error {
+ struct_span_err!(self.tcx().sess, data.span, E0214,
+ "parenthesized parameters may only be used with a trait")
+ .span_label(data.span, "only traits may use parentheses")
+ .emit();
+ } else {
+ let msg = "parenthesized parameters may only be used with a trait".to_string();
+ self.tcx().sess.add_lint(PARENTHESIZED_PARAMS_IN_TYPES_AND_MODULES,
+ ast::CRATE_NODE_ID, data.span, msg);
+ }
}
}
(&data.lifetimes[..], &data.types[..], data.infer_types, &data.bindings[..])
}
Some(&hir::ParenthesizedParameters(_)) => {
- AstConv::prohibit_parenthesized_params(self, &segment.as_ref().unwrap().0);
+ AstConv::prohibit_parenthesized_params(self, &segment.as_ref().unwrap().0,
+ false);
(&[][..], &[][..], true, &[][..])
}
None => (&[][..], &[][..], true, &[][..])
// option. This file may not be copied, modified, or distributed
// except according to those terms.
+#![deny(parenthesized_params_in_types_and_modules)]
+//~^ NOTE lint level defined here
+//~| NOTE lint level defined here
+//~| NOTE lint level defined here
+#![allow(dead_code, unused_variables)]
#![feature(conservative_impl_trait)]
fn main() {
{ fn f<X: ::std::marker()::Send>() {} }
//~^ ERROR parenthesized parameters may only be used with a trait
+ //~| WARN previously accepted
+ //~| NOTE issue #42238
{ fn f() -> impl ::std::marker()::Send { } }
//~^ ERROR parenthesized parameters may only be used with a trait
+ //~| WARN previously accepted
+ //~| NOTE issue #42238
}
#[derive(Clone)]
impl ::std::marker()::Copy for X {}
//~^ ERROR parenthesized parameters may only be used with a trait
+//~| WARN previously accepted
+//~| NOTE issue #42238
// option. This file may not be copied, modified, or distributed
// except according to those terms.
-fn main() {
- let s: String() = String::from("foo");
- //~^ ERROR parenthesized parameters may only be used with a trait
+#![deny(parenthesized_params_in_types_and_modules)]
+//~^ NOTE lint level defined here
+//~| NOTE lint level defined here
+//~| NOTE lint level defined here
+//~| NOTE lint level defined here
+//~| NOTE lint level defined here
+//~| NOTE lint level defined here
+//~| NOTE lint level defined here
+#![allow(dead_code, unused_variables)]
+fn main() {
let x: usize() = 1;
//~^ ERROR parenthesized parameters may only be used with a trait
+ //~| WARN previously accepted
+ //~| NOTE issue #42238
let b: ::std::boxed()::Box<_> = Box::new(1);
//~^ ERROR parenthesized parameters may only be used with a trait
+ //~| WARN previously accepted
+ //~| NOTE issue #42238
macro_rules! pathexpr {
($p:path) => { $p }
let p = pathexpr!(::std::str()::from_utf8)(b"foo").unwrap();
//~^ ERROR parenthesized parameters may only be used with a trait
+ //~| WARN previously accepted
+ //~| NOTE issue #42238
let p = pathexpr!(::std::str::from_utf8())(b"foo").unwrap();
//~^ ERROR parenthesized parameters may only be used with a trait
+ //~| WARN previously accepted
+ //~| NOTE issue #42238
let o : Box<::std::marker()::Send> = Box::new(1);
//~^ ERROR parenthesized parameters may only be used with a trait
+ //~| WARN previously accepted
+ //~| NOTE issue #42238
let o : Box<Send + ::std::marker()::Sync> = Box::new(1);
//~^ ERROR parenthesized parameters may only be used with a trait
+ //~| WARN previously accepted
+ //~| NOTE issue #42238
}
fn foo<X:Default>() {
let d : X() = Default::default();
//~^ ERROR parenthesized parameters may only be used with a trait
+ //~| WARN previously accepted
+ //~| NOTE issue #42238
}