Improve extract_msrv_attr! situation

Author: flip1995

clippy_lints/src/manual_non_exhaustive.rs

@@ -1,4 +1,4 @@
-use crate::utils::{get_inner_attr, meets_msrv, snippet_opt, span_lint_and_then};
+use crate::utils::{meets_msrv, snippet_opt, span_lint_and_then};
 use if_chain::if_chain;
 use rustc_ast::ast::{Attribute, Item, ItemKind, StructField, Variant, VariantData, VisibilityKind};
 use rustc_attr as attr;

clippy_lints/src/manual_strip.rs

@@ -1,12 +1,11 @@
 use crate::consts::{constant, Constant};
 use crate::utils::usage::mutated_variables;
 use crate::utils::{
-    eq_expr_value, get_inner_attr, higher, match_def_path, meets_msrv, multispan_sugg, paths, qpath_res, snippet,
-    span_lint_and_then,
+    eq_expr_value, higher, match_def_path, meets_msrv, multispan_sugg, paths, qpath_res, snippet, span_lint_and_then,
 };
 
 use if_chain::if_chain;
-use rustc_ast::ast::{Attribute, LitKind};
+use rustc_ast::ast::LitKind;
 use rustc_hir::def::Res;
 use rustc_hir::intravisit::{walk_expr, NestedVisitorMap, Visitor};
 use rustc_hir::BinOpKind;

clippy_lints/src/matches.rs

@@ -2,14 +2,14 @@ use crate::consts::{constant, miri_to_const, Constant};
 use crate::utils::sugg::Sugg;
 use crate::utils::usage::is_unused;
 use crate::utils::{
-    expr_block, get_arg_name, get_inner_attr, get_parent_expr, in_macro, indent_of, is_allowed, is_expn_of,
-    is_refutable, is_type_diagnostic_item, is_wild, match_qpath, match_type, match_var, meets_msrv, multispan_sugg,
-    remove_blocks, snippet, snippet_block, snippet_with_applicability, span_lint_and_help, span_lint_and_note,
-    span_lint_and_sugg, span_lint_and_then,
+    expr_block, get_arg_name, get_parent_expr, in_macro, indent_of, is_allowed, is_expn_of, is_refutable,
+    is_type_diagnostic_item, is_wild, match_qpath, match_type, match_var, meets_msrv, multispan_sugg, remove_blocks,
+    snippet, snippet_block, snippet_with_applicability, span_lint_and_help, span_lint_and_note, span_lint_and_sugg,
+    span_lint_and_then,
 };
 use crate::utils::{paths, search_same, SpanlessEq, SpanlessHash};
 use if_chain::if_chain;
-use rustc_ast::ast::{Attribute, LitKind};
+use rustc_ast::ast::LitKind;
 use rustc_data_structures::fx::FxHashMap;
 use rustc_errors::Applicability;
 use rustc_hir::def::CtorKind;

clippy_lints/src/methods/mod.rs

@@ -12,7 +12,6 @@ use std::iter;
 use bind_instead_of_map::BindInsteadOfMap;
 use if_chain::if_chain;
 use rustc_ast::ast;
-use rustc_ast::ast::Attribute;
 use rustc_errors::Applicability;
 use rustc_hir as hir;
 use rustc_hir::intravisit::{self, Visitor};
@@ -29,12 +28,11 @@ use crate::consts::{constant, Constant};
 use crate::utils::eager_or_lazy::is_lazyness_candidate;
 use crate::utils::usage::mutated_variables;
 use crate::utils::{
-    contains_ty, get_arg_name, get_inner_attr, get_parent_expr, get_trait_def_id, has_iter_method, higher,
-    implements_trait, in_macro, is_copy, is_expn_of, is_type_diagnostic_item, iter_input_pats, last_path_segment,
-    match_def_path, match_qpath, match_trait_method, match_type, match_var, meets_msrv, method_calls,
-    method_chain_args, paths, remove_blocks, return_ty, single_segment_path, snippet, snippet_with_applicability,
-    snippet_with_macro_callsite, span_lint, span_lint_and_help, span_lint_and_sugg, span_lint_and_then, sugg,
-    walk_ptrs_ty_depth, SpanlessEq,
+    contains_ty, get_arg_name, get_parent_expr, get_trait_def_id, has_iter_method, higher, implements_trait, in_macro,
+    is_copy, is_expn_of, is_type_diagnostic_item, iter_input_pats, last_path_segment, match_def_path, match_qpath,
+    match_trait_method, match_type, match_var, meets_msrv, method_calls, method_chain_args, paths, remove_blocks,
+    return_ty, single_segment_path, snippet, snippet_with_applicability, snippet_with_macro_callsite, span_lint,
+    span_lint_and_help, span_lint_and_sugg, span_lint_and_then, sugg, walk_ptrs_ty_depth, SpanlessEq,
 };
 use semver::{Version, VersionReq};
 

clippy_lints/src/utils/mod.rs

@@ -82,27 +82,24 @@ pub fn meets_msrv(msrv: Option<&VersionReq>, lint_msrv: &Version) -> bool {
 #[macro_export]
 macro_rules! extract_msrv_attr {
     (LateContext) => {
-        fn enter_lint_attrs(&mut self, cx: &rustc_lint::LateContext<'tcx>, attrs: &'tcx [Attribute]) {
-            match get_inner_attr(cx.sess(), attrs, "msrv") {
-                Some(msrv_attr) => {
-                    if let Some(msrv) = msrv_attr.value_str() {
-                        self.msrv = crate::utils::parse_msrv(&msrv.to_string(), Some(cx.sess()), Some(msrv_attr.span));
-                    } else {
-                        cx.sess().span_err(msrv_attr.span, "bad clippy attribute");
-                    }
-                },
-                _ => (),
-            }
-        }
+        extract_msrv_attr!(@LateContext, ());
     };
     (EarlyContext) => {
-        fn enter_lint_attrs(&mut self, cx: &rustc_lint::EarlyContext<'tcx>, attrs: &'tcx [Attribute]) {
-            match get_inner_attr(cx.sess, attrs, "msrv") {
+        extract_msrv_attr!(@EarlyContext);
+    };
+    (@$context:ident$(, $call:tt)?) => {
+        fn enter_lint_attrs(&mut self, cx: &rustc_lint::$context<'tcx>, attrs: &'tcx [rustc_ast::ast::Attribute]) {
+            use $crate::utils::get_unique_inner_attr;
+            match get_unique_inner_attr(cx.sess$($call)?, attrs, "msrv") {
                 Some(msrv_attr) => {
                     if let Some(msrv) = msrv_attr.value_str() {
-                        self.msrv = crate::utils::parse_msrv(&msrv.to_string(), Some(cx.sess), Some(msrv_attr.span));
+                        self.msrv = $crate::utils::parse_msrv(
+                            &msrv.to_string(),
+                            Some(cx.sess$($call)?),
+                            Some(msrv_attr.span),
+                        );
                     } else {
-                        cx.sess.span_err(msrv_attr.span, "bad clippy attribute");
+                        cx.sess$($call)?.span_err(msrv_attr.span, "bad clippy attribute");
                     }
                 },
                 _ => (),