Replace paste with concat

Author: blyxyas

clippy_lints/src/lib.rs

@@ -1,6 +1,7 @@
 #![feature(array_windows)]
 #![feature(binary_heap_into_iter_sorted)]
 #![feature(box_patterns)]
+#![feature(macro_metavar_expr_concat)]
 #![feature(control_flow_enum)]
 #![feature(f128)]
 #![feature(f16)]

clippy_utils/Cargo.toml

@@ -10,7 +10,6 @@ arrayvec = { version = "0.7", default-features = false }
 itertools = "0.12"
 # FIXME(f16_f128): remove when no longer needed for parsing
 rustc_apfloat = "0.2.0"
-paste = "1.0.15"
 
 [package.metadata.rust-analyzer]
 # This crate uses #[feature(rustc_private)]

clippy_utils/src/declare_clippy_lint.rs

@@ -1,9 +1,8 @@
 // warn on lints, that are included in `rust-lang/rust`s bootstrap
 #![warn(rust_2018_idioms, unused_lifetimes)]
 
-pub use paste;
-
 #[macro_export]
+#[allow(clippy::crate_in_macro_def)]
 macro_rules! declare_clippy_lint {
     (@
         // $(#[$($attrss:tt)*])*
@@ -23,7 +22,7 @@ macro_rules! declare_clippy_lint {
         }
 
         $crate::paste::paste! {
-            pub(crate) static [< $lint_name _INFO >]: &'static crate::LintInfo = &crate::LintInfo {
+            pub(crate) static ${concat($lint_name, _INFO)}: &'static crate::LintInfo = &crate::LintInfo {
                 lint: &$lint_name,
                 category:  $lintcategory,
                 explanation: concat!($($lit,"\n",)*),

clippy_utils/src/lib.rs

@@ -4,6 +4,7 @@
 #![feature(f128)]
 #![feature(f16)]
 #![feature(if_let_guard)]
+#![feature(macro_metavar_expr_concat)]
 #![feature(let_chains)]
 #![feature(never_type)]
 #![feature(rustc_private)]