Auto merge of #53044 - SergioBenitez:stable-attr-literals, r=petrochenkov

Stabilize 'attr_literals' feature.

RFC Issue: rust-lang/rfcs#1559
Tracking Issue: rust-lang/rust#34981

Reference PR: https://github.com/rust-lang-nursery/reference/pull/388.

src/doc/unstable-book/src/language-features/attr-literals.md

-# `attr_literals`
-
-The tracking issue for this feature is: [#34981]
-
-[#34981]: https://github.com/rust-lang/rust/issues/34981
-
-------------------------
-
-At present, literals are only accepted as the value of a key-value pair in
-attributes. What's more, only _string_ literals are accepted. This means that
-literals can only appear in forms of `#[attr(name = "value")]` or
-`#[attr = "value"]`.
-
-The `attr_literals` unstable feature allows other types of literals to be used
-in attributes. Here are some examples of attributes that can now be used with
-this feature enabled:
-
-```rust,ignore
-#[attr]
-#[attr(true)]
-#[attr(ident)]
-#[attr(ident, 100, true, "true", ident = 100, ident = "hello", ident(100))]
-#[attr(100)]
-#[attr(enabled = true)]
-#[enabled(true)]
-#[attr("hello")]
-#[repr(C, align = 4)]
-#[repr(C, align(4))]
-```
-

src/liballoc/tests/lib.rs

@@ -10,7 +10,6 @@
 
 #![feature(allocator_api)]
 #![feature(alloc_system)]
-#![feature(attr_literals)]
 #![feature(box_syntax)]
 #![feature(const_fn)]
 #![feature(drain_filter)]

src/libcore/lib.rs

@@ -77,7 +77,6 @@
 #![feature(arbitrary_self_types)]
 #![feature(asm)]
 #![feature(associated_type_defaults)]
-#![feature(attr_literals)]
 #![feature(cfg_target_has_atomic)]
 #![feature(concat_idents)]
 #![feature(const_fn)]

src/librustc_typeck/diagnostics.rs

@@ -4630,7 +4630,7 @@ struct LengthWithUnit<U> {
 Erroneous code example:
 
 ```compile_fail,E0691
-#![feature(repr_align, attr_literals)]
+#![feature(repr_align)]
 
 #[repr(align(32))]
 struct ForceAlign32;
@@ -4657,7 +4657,7 @@ struct LengthWithUnit<U> {
 if you need to keep the field for some reason:
 
 ```
-#![feature(repr_align, attr_literals)]
+#![feature(repr_align)]
 
 use std::marker::PhantomData;
 

src/libstd/lib.rs

@@ -244,7 +244,6 @@
 #![feature(arbitrary_self_types)]
 #![feature(array_error_internals)]
 #![feature(asm)]
-#![feature(attr_literals)]
 #![feature(box_syntax)]
 #![feature(cfg_target_has_atomic)]
 #![feature(cfg_target_thread_local)]

src/libsyntax/diagnostic_list.rs

@@ -213,19 +213,18 @@ struct MyStruct {
 "##,
 
 E0565: r##"
-A literal was used in an attribute that doesn't support literals.
+A literal was used in a built-in attribute that doesn't support literals.
 
 Erroneous code example:
 
 ```ignore (compile_fail not working here; see Issue #43707)
-#![feature(attr_literals)]
-
 #[inline("always")] // error: unsupported literal
 pub fn something() {}
 ```
 
-Literals in attributes are new and largely unsupported. Work to support literals
-where appropriate is ongoing. Try using an unquoted name instead:
+Literals in attributes are new and largely unsupported in built-in attributes.
+Work to support literals where appropriate is ongoing. Try using an unquoted
+name instead:
 
 ```
 #[inline(always)]

src/libsyntax/feature_gate.rs

@@ -289,9 +289,6 @@ pub fn walk_feature_fields<F>(&self, mut f: F)
     // Allows exhaustive pattern matching on types that contain uninhabited types
     (active, exhaustive_patterns, "1.13.0", Some(51085), None),
 
-    // Allows all literals in attribute lists and values of key-value pairs
-    (active, attr_literals, "1.13.0", Some(34981), None),
-
     // Allows untagged unions `union U { ... }`
     (active, untagged_unions, "1.13.0", Some(32836), None),
 
@@ -654,6 +651,8 @@ pub fn walk_feature_fields<F>(&self, mut f: F)
     (accepted, tool_attributes, "1.30.0", Some(44690), None),
     // Allows multi-segment paths in attributes and derives
     (accepted, proc_macro_path_invoc, "1.30.0", Some(38356), None),
+    // Allows all literals in attribute lists and values of key-value pairs.
+    (accepted, attr_literals, "1.30.0", Some(34981), None),
 );
 
 // If you change this, please modify src/doc/unstable-book as well. You must
@@ -1451,22 +1450,6 @@ fn check_abi(&self, abi: Abi, span: Span) {
     }
 }
 
-fn contains_novel_literal(item: &ast::MetaItem) -> bool {
-    use ast::MetaItemKind::*;
-    use ast::NestedMetaItemKind::*;
-
-    match item.node {
-        Word => false,
-        NameValue(ref lit) => !lit.node.is_str(),
-        List(ref list) => list.iter().any(|li| {
-            match li.node {
-                MetaItem(ref mi) => contains_novel_literal(mi),
-                Literal(_) => true,
-            }
-        }),
-    }
-}
-
 impl<'a> PostExpansionVisitor<'a> {
     fn whole_crate_feature_gates(&mut self, _krate: &ast::Crate) {
         for &(ident, span) in &*self.context.parse_sess.non_modrs_mods.borrow() {
@@ -1526,28 +1509,11 @@ fn visit_attribute(&mut self, attr: &ast::Attribute) {
         }
 
         if !self.context.features.unrestricted_attribute_tokens {
-            // Unfortunately, `parse_meta` cannot be called speculatively because it can report
-            // errors by itself, so we have to call it only if the feature is disabled.
-            match attr.parse_meta(self.context.parse_sess) {
-                Ok(meta) => {
-                    // allow attr_literals in #[repr(align(x))] and #[repr(packed(n))]
-                    let mut allow_attr_literal = false;
-                    if attr.path == "repr" {
-                        if let Some(content) = meta.meta_item_list() {
-                            allow_attr_literal = content.iter().any(
-                                |c| c.check_name("align") || c.check_name("packed"));
-                        }
-                    }
-
-                    if !allow_attr_literal && contains_novel_literal(&meta) {
-                        gate_feature_post!(&self, attr_literals, attr.span,
-                                        "non-string literals in attributes, or string \
-                                        literals in top-level positions, are experimental");
-                    }
-                }
-                Err(mut err) => {
-                    err.help("try enabling `#![feature(unrestricted_attribute_tokens)]`").emit()
-                }
+            // Unfortunately, `parse_meta` cannot be called speculatively
+            // because it can report errors by itself, so we have to call it
+            // only if the feature is disabled.
+            if let Err(mut err) = attr.parse_meta(self.context.parse_sess) {
+                err.help("try enabling `#![feature(unrestricted_attribute_tokens)]`").emit()
             }
         }
     }

src/test/pretty/attr-literals.rs

@@ -11,7 +11,7 @@
 // pp-exact
 // Tests literals in attributes.
 
-#![feature(custom_attribute, attr_literals)]
+#![feature(custom_attribute)]
 
 fn main() {
     #![hello("hi", 1, 2, 1.012, pi = 3.14, bye, name("John"))]

src/test/run-pass-fulldeps/macro-crate-multi-decorator-literals.rs

@@ -11,7 +11,7 @@
 // aux-build:macro_crate_test.rs
 // ignore-stage1
 
-#![feature(plugin, rustc_attrs, attr_literals)]
+#![feature(plugin, rustc_attrs)]
 #![plugin(macro_crate_test)]
 
 #[macro_use]

src/test/run-pass/align-with-extern-c-fn.rs

@@ -11,7 +11,6 @@
 // #45662
 
 #![feature(repr_align)]
-#![feature(attr_literals)]
 
 #[repr(align(16))]
 pub struct A(i64);

src/test/ui/attr-usage-repr.rs

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(attr_literals)]
 #![feature(repr_simd)]
 
 #[repr(C)] //~ ERROR: attribute should be applied to struct, enum or union

src/test/ui/attr-usage-repr.stderr

 error[E0517]: attribute should be applied to struct, enum or union
-  --> $DIR/attr-usage-repr.rs:14:8
+  --> $DIR/attr-usage-repr.rs:13:8
    |
 LL | #[repr(C)] //~ ERROR: attribute should be applied to struct, enum or union
    |        ^
@@ -7,7 +7,7 @@ LL | fn f() {}
    | --------- not a struct, enum or union
 
 error[E0517]: attribute should be applied to enum
-  --> $DIR/attr-usage-repr.rs:26:8
+  --> $DIR/attr-usage-repr.rs:25:8
    |
 LL | #[repr(i8)] //~ ERROR: attribute should be applied to enum
    |        ^^
@@ -15,7 +15,7 @@ LL | struct SInt(f64, f64);
    | ---------------------- not an enum
 
 error[E0517]: attribute should be applied to struct or union
-  --> $DIR/attr-usage-repr.rs:32:8
+  --> $DIR/attr-usage-repr.rs:31:8
    |
 LL | #[repr(align(8))] //~ ERROR: attribute should be applied to struct
    |        ^^^^^^^^
@@ -23,7 +23,7 @@ LL | enum EAlign { A, B }
    | -------------------- not a struct or union
 
 error[E0517]: attribute should be applied to struct or union
-  --> $DIR/attr-usage-repr.rs:35:8
+  --> $DIR/attr-usage-repr.rs:34:8
    |
 LL | #[repr(packed)] //~ ERROR: attribute should be applied to struct
    |        ^^^^^^
@@ -31,7 +31,7 @@ LL | enum EPacked { A, B }
    | --------------------- not a struct or union
 
 error[E0517]: attribute should be applied to struct
-  --> $DIR/attr-usage-repr.rs:38:8
+  --> $DIR/attr-usage-repr.rs:37:8
    |
 LL | #[repr(simd)] //~ ERROR: attribute should be applied to struct
    |        ^^^^

src/test/ui/error-codes/E0565-1.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(attr_literals)]
-
 // deprecated doesn't currently support literals
 #[deprecated("since")] //~ ERROR E0565
 fn f() {  }

src/test/ui/error-codes/E0565-1.stderr

 error[E0565]: unsupported literal
-  --> $DIR/E0565-1.rs:14:14
+  --> $DIR/E0565-1.rs:12:14
    |
 LL | #[deprecated("since")] //~ ERROR E0565
    |              ^^^^^^^

src/test/ui/error-codes/E0565.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(attr_literals)]
-
 // repr currently doesn't support literals
 #[repr("C")] //~ ERROR E0565
 struct A {  }

src/test/ui/error-codes/E0565.stderr

 error[E0565]: unsupported literal
-  --> $DIR/E0565.rs:14:8
+  --> $DIR/E0565.rs:12:8
    |
 LL | #[repr("C")] //~ ERROR E0565
    |        ^^^

src/test/ui/feature-gates/feature-gate-custom_attribute.rs

@@ -10,7 +10,7 @@
 
 // Check that literals in attributes parse just fine.
 
-#![feature(rustc_attrs, attr_literals)]
+#![feature(rustc_attrs)]
 #![allow(dead_code)]
 #![allow(unused_variables)]
 

src/test/ui/gated-attr-literals.rs

-// Copyright 2015 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.
-
-// Check that literals in attributes don't parse without the feature gate.
-
-// gate-test-attr_literals
-
-#![feature(custom_attribute)]
-
-#[fake_attr] // OK
-#[fake_attr(100)]
-    //~^ ERROR non-string literals in attributes
-#[fake_attr(1, 2, 3)]
-    //~^ ERROR non-string literals in attributes
-#[fake_attr("hello")]
-    //~^ ERROR string literals in top-level positions, are experimental
-#[fake_attr(name = "hello")] // OK
-#[fake_attr(1, "hi", key = 12, true, false)]
-    //~^ ERROR non-string literals in attributes, or string literals in top-level positions
-#[fake_attr(key = "hello", val = 10)]
-    //~^ ERROR non-string literals in attributes
-#[fake_attr(key("hello"), val(10))]
-    //~^ ERROR non-string literals in attributes, or string literals in top-level positions
-#[fake_attr(enabled = true, disabled = false)]
-    //~^ ERROR non-string literals in attributes
-#[fake_attr(true)]
-    //~^ ERROR non-string literals in attributes
-#[fake_attr(pi = 3.14159)]
-    //~^ ERROR non-string literals in attributes
-#[fake_attr(b"hi")]
-    //~^ ERROR string literals in top-level positions, are experimental
-#[fake_doc(r"doc")]
-    //~^ ERROR string literals in top-level positions, are experimental
-struct Q {  }
-
-fn main() { }

src/test/ui/gated-attr-literals.stderr

-error[E0658]: non-string literals in attributes, or string literals in top-level positions, are experimental (see issue #34981)
-  --> $DIR/gated-attr-literals.rs:18:1
-   |
-LL | #[fake_attr(100)]
-   | ^^^^^^^^^^^^^^^^^
-   |
-   = help: add #![feature(attr_literals)] to the crate attributes to enable
-
-error[E0658]: non-string literals in attributes, or string literals in top-level positions, are experimental (see issue #34981)
-  --> $DIR/gated-attr-literals.rs:20:1
-   |
-LL | #[fake_attr(1, 2, 3)]
-   | ^^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: add #![feature(attr_literals)] to the crate attributes to enable
-
-error[E0658]: non-string literals in attributes, or string literals in top-level positions, are experimental (see issue #34981)
-  --> $DIR/gated-attr-literals.rs:22:1
-   |
-LL | #[fake_attr("hello")]
-   | ^^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: add #![feature(attr_literals)] to the crate attributes to enable
-
-error[E0658]: non-string literals in attributes, or string literals in top-level positions, are experimental (see issue #34981)
-  --> $DIR/gated-attr-literals.rs:25:1
-   |
-LL | #[fake_attr(1, "hi", key = 12, true, false)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: add #![feature(attr_literals)] to the crate attributes to enable
-
-error[E0658]: non-string literals in attributes, or string literals in top-level positions, are experimental (see issue #34981)
-  --> $DIR/gated-attr-literals.rs:27:1
-   |
-LL | #[fake_attr(key = "hello", val = 10)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: add #![feature(attr_literals)] to the crate attributes to enable
-
-error[E0658]: non-string literals in attributes, or string literals in top-level positions, are experimental (see issue #34981)
-  --> $DIR/gated-attr-literals.rs:29:1
-   |
-LL | #[fake_attr(key("hello"), val(10))]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: add #![feature(attr_literals)] to the crate attributes to enable
-
-error[E0658]: non-string literals in attributes, or string literals in top-level positions, are experimental (see issue #34981)
-  --> $DIR/gated-attr-literals.rs:31:1
-   |
-LL | #[fake_attr(enabled = true, disabled = false)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: add #![feature(attr_literals)] to the crate attributes to enable
-
-error[E0658]: non-string literals in attributes, or string literals in top-level positions, are experimental (see issue #34981)
-  --> $DIR/gated-attr-literals.rs:33:1
-   |
-LL | #[fake_attr(true)]
-   | ^^^^^^^^^^^^^^^^^^
-   |
-   = help: add #![feature(attr_literals)] to the crate attributes to enable
-
-error[E0658]: non-string literals in attributes, or string literals in top-level positions, are experimental (see issue #34981)
-  --> $DIR/gated-attr-literals.rs:35:1
-   |
-LL | #[fake_attr(pi = 3.14159)]
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: add #![feature(attr_literals)] to the crate attributes to enable
-
-error[E0658]: non-string literals in attributes, or string literals in top-level positions, are experimental (see issue #34981)
-  --> $DIR/gated-attr-literals.rs:37:1
-   |
-LL | #[fake_attr(b"hi")]
-   | ^^^^^^^^^^^^^^^^^^^
-   |
-   = help: add #![feature(attr_literals)] to the crate attributes to enable
-
-error[E0658]: non-string literals in attributes, or string literals in top-level positions, are experimental (see issue #34981)
-  --> $DIR/gated-attr-literals.rs:39:1
-   |
-LL | #[fake_doc(r"doc")]
-   | ^^^^^^^^^^^^^^^^^^^
-   |
-   = help: add #![feature(attr_literals)] to the crate attributes to enable
-
-error: aborting due to 11 previous errors
-
-For more information about this error, try `rustc --explain E0658`.

src/test/ui/issues/issue-43925.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(attr_literals)]
-
 #[link(name="foo", cfg("rlib"))] //~ ERROR invalid argument for `cfg(..)`
 extern {}
 

src/test/ui/issues/issue-43925.stderr

 error: invalid argument for `cfg(..)`
-  --> $DIR/issue-43925.rs:13:24
+  --> $DIR/issue-43925.rs:11:24
    |
 LL | #[link(name="foo", cfg("rlib"))] //~ ERROR invalid argument for `cfg(..)`
    |                        ^^^^^^

src/test/ui/parser/expected-comma-found-token.rs

@@ -20,3 +20,5 @@
 )]
 trait T {}
 //~^^^ ERROR expected one of `)` or `,`, found `label`
+
+fn main() {  }

src/test/ui/repr/repr-transparent-other-reprs.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(repr_align, attr_literals)]
+#![feature(repr_align)]
 
 // See also repr-transparent.rs
 

src/test/ui/repr/repr-transparent.rs

@@ -13,7 +13,7 @@
 // - repr-transparent-other-reprs.rs
 // - repr-transparent-other-items.rs
 
-#![feature(repr_align, attr_literals)]
+#![feature(repr_align)]
 
 use std::marker::PhantomData;
 

src/test/ui/rustc-args-required-const.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(attr_literals, rustc_attrs, const_fn)]
+#![feature(rustc_attrs, const_fn)]
 
 #[rustc_args_required_const(0)]
 fn foo(_a: i32) {

src/test/ui/rustc-args-required-const2.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(attr_literals, rustc_attrs, const_fn)]
+#![feature(rustc_attrs, const_fn)]
 
 #[rustc_args_required_const(0)]
 fn foo(_a: i32) {

src/test/ui/suffixed-literal-meta.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(attr_literals)]
-
 #[path = 1usize] //~ ERROR: suffixed literals are not allowed in attributes
 #[path = 1u8] //~ ERROR: suffixed literals are not allowed in attributes
 #[path = 1u16] //~ ERROR: suffixed literals are not allowed in attributes

src/test/ui/suffixed-literal-meta.stderr

 error: suffixed literals are not allowed in attributes
-  --> $DIR/suffixed-literal-meta.rs:13:10
+  --> $DIR/suffixed-literal-meta.rs:11:10
    |
 LL | #[path = 1usize] //~ ERROR: suffixed literals are not allowed in attributes
    |          ^^^^^^
@@ -7,7 +7,7 @@ LL | #[path = 1usize] //~ ERROR: suffixed literals are not allowed in attributes
    = help: instead of using a suffixed literal (1u8, 1.0f32, etc.), use an unsuffixed version (1, 1.0, etc.).
 
 error: suffixed literals are not allowed in attributes
-  --> $DIR/suffixed-literal-meta.rs:14:10
+  --> $DIR/suffixed-literal-meta.rs:12:10
    |
 LL | #[path = 1u8] //~ ERROR: suffixed literals are not allowed in attributes
    |          ^^^
@@ -15,7 +15,7 @@ LL | #[path = 1u8] //~ ERROR: suffixed literals are not allowed in attributes
    = help: instead of using a suffixed literal (1u8, 1.0f32, etc.), use an unsuffixed version (1, 1.0, etc.).
 
 error: suffixed literals are not allowed in attributes
-  --> $DIR/suffixed-literal-meta.rs:15:10
+  --> $DIR/suffixed-literal-meta.rs:13:10
    |
 LL | #[path = 1u16] //~ ERROR: suffixed literals are not allowed in attributes
    |          ^^^^
@@ -23,7 +23,7 @@ LL | #[path = 1u16] //~ ERROR: suffixed literals are not allowed in attributes
    = help: instead of using a suffixed literal (1u8, 1.0f32, etc.), use an unsuffixed version (1, 1.0, etc.).
 
 error: suffixed literals are not allowed in attributes
-  --> $DIR/suffixed-literal-meta.rs:16:10
+  --> $DIR/suffixed-literal-meta.rs:14:10
    |
 LL | #[path = 1u32] //~ ERROR: suffixed literals are not allowed in attributes
    |          ^^^^
@@ -31,7 +31,7 @@ LL | #[path = 1u32] //~ ERROR: suffixed literals are not allowed in attributes
    = help: instead of using a suffixed literal (1u8, 1.0f32, etc.), use an unsuffixed version (1, 1.0, etc.).
 
 error: suffixed literals are not allowed in attributes
-  --> $DIR/suffixed-literal-meta.rs:17:10
+  --> $DIR/suffixed-literal-meta.rs:15:10
    |
 LL | #[path = 1u64] //~ ERROR: suffixed literals are not allowed in attributes
    |          ^^^^
@@ -39,7 +39,7 @@ LL | #[path = 1u64] //~ ERROR: suffixed literals are not allowed in attributes
    = help: instead of using a suffixed literal (1u8, 1.0f32, etc.), use an unsuffixed version (1, 1.0, etc.).
 
 error: suffixed literals are not allowed in attributes
-  --> $DIR/suffixed-literal-meta.rs:18:10
+  --> $DIR/suffixed-literal-meta.rs:16:10
    |
 LL | #[path = 1isize] //~ ERROR: suffixed literals are not allowed in attributes
    |          ^^^^^^
@@ -47,7 +47,7 @@ LL | #[path = 1isize] //~ ERROR: suffixed literals are not allowed in attributes
    = help: instead of using a suffixed literal (1u8, 1.0f32, etc.), use an unsuffixed version (1, 1.0, etc.).
 
 error: suffixed literals are not allowed in attributes
-  --> $DIR/suffixed-literal-meta.rs:19:10
+  --> $DIR/suffixed-literal-meta.rs:17:10
    |
 LL | #[path = 1i8] //~ ERROR: suffixed literals are not allowed in attributes
    |          ^^^
@@ -55,7 +55,7 @@ LL | #[path = 1i8] //~ ERROR: suffixed literals are not allowed in attributes
    = help: instead of using a suffixed literal (1u8, 1.0f32, etc.), use an unsuffixed version (1, 1.0, etc.).
 
 error: suffixed literals are not allowed in attributes
-  --> $DIR/suffixed-literal-meta.rs:20:10
+  --> $DIR/suffixed-literal-meta.rs:18:10
    |
 LL | #[path = 1i16] //~ ERROR: suffixed literals are not allowed in attributes
    |          ^^^^
@@ -63,7 +63,7 @@ LL | #[path = 1i16] //~ ERROR: suffixed literals are not allowed in attributes
    = help: instead of using a suffixed literal (1u8, 1.0f32, etc.), use an unsuffixed version (1, 1.0, etc.).
 
 error: suffixed literals are not allowed in attributes
-  --> $DIR/suffixed-literal-meta.rs:21:10
+  --> $DIR/suffixed-literal-meta.rs:19:10
    |
 LL | #[path = 1i32] //~ ERROR: suffixed literals are not allowed in attributes
    |          ^^^^
@@ -71,7 +71,7 @@ LL | #[path = 1i32] //~ ERROR: suffixed literals are not allowed in attributes
    = help: instead of using a suffixed literal (1u8, 1.0f32, etc.), use an unsuffixed version (1, 1.0, etc.).
 
 error: suffixed literals are not allowed in attributes
-  --> $DIR/suffixed-literal-meta.rs:22:10
+  --> $DIR/suffixed-literal-meta.rs:20:10
    |
 LL | #[path = 1i64] //~ ERROR: suffixed literals are not allowed in attributes
    |          ^^^^
@@ -79,7 +79,7 @@ LL | #[path = 1i64] //~ ERROR: suffixed literals are not allowed in attributes
    = help: instead of using a suffixed literal (1u8, 1.0f32, etc.), use an unsuffixed version (1, 1.0, etc.).
 
 error: suffixed literals are not allowed in attributes
-  --> $DIR/suffixed-literal-meta.rs:23:10
+  --> $DIR/suffixed-literal-meta.rs:21:10
    |
 LL | #[path = 1.0f32] //~ ERROR: suffixed literals are not allowed in attributes
    |          ^^^^^^
@@ -87,7 +87,7 @@ LL | #[path = 1.0f32] //~ ERROR: suffixed literals are not allowed in attributes
    = help: instead of using a suffixed literal (1u8, 1.0f32, etc.), use an unsuffixed version (1, 1.0, etc.).
 
 error: suffixed literals are not allowed in attributes
-  --> $DIR/suffixed-literal-meta.rs:24:10
+  --> $DIR/suffixed-literal-meta.rs:22:10
    |
 LL | #[path = 1.0f64] //~ ERROR: suffixed literals are not allowed in attributes
    |          ^^^^^^