Auto merge of rust-lang#13244 - Jarcho:get_src_display, r=Alexendoo

Start removing `snippet_opt` in favor of `get_source_text`

Continuing the job of removing unnecessary allocations.

changelog: none

Author: bors

clippy_lints/src/booleans.rs

@@ -1,6 +1,6 @@
 use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_hir_and_then};
 use clippy_utils::eq_expr_value;
-use clippy_utils::source::snippet_opt;
+use clippy_utils::source::SpanRangeExt;
 use clippy_utils::ty::{implements_trait, is_type_diagnostic_item};
 use rustc_ast::ast::LitKind;
 use rustc_errors::Applicability;
@@ -134,28 +134,30 @@ fn check_inverted_bool_in_condition(
 
     let suggestion = match (left.kind, right.kind) {
         (ExprKind::Unary(UnOp::Not, left_sub), ExprKind::Unary(UnOp::Not, right_sub)) => {
-            let Some(left) = snippet_opt(cx, left_sub.span) else {
+            let Some(left) = left_sub.span.get_source_text(cx) else {
                 return;
             };
-            let Some(right) = snippet_opt(cx, right_sub.span) else {
+            let Some(right) = right_sub.span.get_source_text(cx) else {
                 return;
             };
             let Some(op) = bin_op_eq_str(op) else { return };
             format!("{left} {op} {right}")
         },
         (ExprKind::Unary(UnOp::Not, left_sub), _) => {
-            let Some(left) = snippet_opt(cx, left_sub.span) else {
+            let Some(left) = left_sub.span.get_source_text(cx) else {
                 return;
             };
-            let Some(right) = snippet_opt(cx, right.span) else {
+            let Some(right) = right.span.get_source_text(cx) else {
                 return;
             };
             let Some(op) = inverted_bin_op_eq_str(op) else { return };
             format!("{left} {op} {right}")
         },
         (_, ExprKind::Unary(UnOp::Not, right_sub)) => {
-            let Some(left) = snippet_opt(cx, left.span) else { return };
-            let Some(right) = snippet_opt(cx, right_sub.span) else {
+            let Some(left) = left.span.get_source_text(cx) else {
+                return;
+            };
+            let Some(right) = right_sub.span.get_source_text(cx) else {
                 return;
             };
             let Some(op) = inverted_bin_op_eq_str(op) else { return };
@@ -313,8 +315,7 @@ impl<'a, 'tcx, 'v> SuggestContext<'a, 'tcx, 'v> {
                         self.output.push_str(&str);
                     } else {
                         self.output.push('!');
-                        let snip = snippet_opt(self.cx, terminal.span)?;
-                        self.output.push_str(&snip);
+                        self.output.push_str(&terminal.span.get_source_text(self.cx)?);
                     }
                 },
                 True | False | Not(_) => {
@@ -345,8 +346,12 @@ impl<'a, 'tcx, 'v> SuggestContext<'a, 'tcx, 'v> {
                 }
             },
             &Term(n) => {
-                let snip = snippet_opt(self.cx, self.terminals[n as usize].span.source_callsite())?;
-                self.output.push_str(&snip);
+                self.output.push_str(
+                    &self.terminals[n as usize]
+                        .span
+                        .source_callsite()
+                        .get_source_text(self.cx)?,
+                );
             },
         }
         Some(())
@@ -370,8 +375,8 @@ fn simplify_not(cx: &LateContext<'_>, expr: &Expr<'_>) -> Option<String> {
                 _ => None,
             }
             .and_then(|op| {
-                let lhs_snippet = snippet_opt(cx, lhs.span)?;
-                let rhs_snippet = snippet_opt(cx, rhs.span)?;
+                let lhs_snippet = lhs.span.get_source_text(cx)?;
+                let rhs_snippet = rhs.span.get_source_text(cx)?;
 
                 if !(lhs_snippet.starts_with('(') && lhs_snippet.ends_with(')')) {
                     if let (ExprKind::Cast(..), BinOpKind::Ge) = (&lhs.kind, binop.node) {
@@ -399,7 +404,7 @@ fn simplify_not(cx: &LateContext<'_>, expr: &Expr<'_>) -> Option<String> {
                     let path: &str = path.ident.name.as_str();
                     a == path
                 })
-                .and_then(|(_, neg_method)| Some(format!("{}.{neg_method}()", snippet_opt(cx, receiver.span)?)))
+                .and_then(|(_, neg_method)| Some(format!("{}.{neg_method}()", receiver.span.get_source_text(cx)?)))
         },
         _ => None,
     }

clippy_lints/src/borrow_deref_ref.rs

@@ -1,6 +1,6 @@
 use crate::reference::DEREF_ADDROF;
 use clippy_utils::diagnostics::span_lint_and_then;
-use clippy_utils::source::snippet_opt;
+use clippy_utils::source::SpanRangeExt;
 use clippy_utils::ty::implements_trait;
 use clippy_utils::{get_parent_expr, is_from_proc_macro, is_lint_allowed};
 use rustc_errors::Applicability;
@@ -73,6 +73,7 @@ impl<'tcx> LateLintPass<'tcx> for BorrowDerefRef {
                 }
             })
             && !is_from_proc_macro(cx, e)
+            && let Some(deref_text) = deref_target.span.get_source_text(cx)
         {
             span_lint_and_then(
                 cx,
@@ -83,7 +84,7 @@ impl<'tcx> LateLintPass<'tcx> for BorrowDerefRef {
                     diag.span_suggestion(
                         e.span,
                         "if you would like to reborrow, try removing `&*`",
-                        snippet_opt(cx, deref_target.span).unwrap(),
+                        deref_text.as_str(),
                         Applicability::MachineApplicable,
                     );
 
@@ -98,7 +99,7 @@ impl<'tcx> LateLintPass<'tcx> for BorrowDerefRef {
                     diag.span_suggestion(
                         e.span,
                         "if you would like to deref, try using `&**`",
-                        format!("&**{}", &snippet_opt(cx, deref_target.span).unwrap()),
+                        format!("&**{deref_text}"),
                         Applicability::MaybeIncorrect,
                     );
                 },

clippy_lints/src/format.rs

@@ -1,6 +1,6 @@
 use clippy_utils::diagnostics::span_lint_and_sugg;
 use clippy_utils::macros::{find_format_arg_expr, root_macro_call_first_node, FormatArgsStorage};
-use clippy_utils::source::{snippet_opt, snippet_with_context};
+use clippy_utils::source::{snippet_with_context, SpanRangeExt};
 use clippy_utils::sugg::Sugg;
 use rustc_ast::{FormatArgsPiece, FormatOptions, FormatTrait};
 use rustc_errors::Applicability;
@@ -65,7 +65,7 @@ impl<'tcx> LateLintPass<'tcx> for UselessFormat {
                 ([], []) => span_useless_format_empty(cx, call_site, "String::new()".to_owned(), applicability),
                 ([], [_]) => {
                     // Simulate macro expansion, converting {{ and }} to { and }.
-                    let Some(snippet) = snippet_opt(cx, format_args.span) else {
+                    let Some(snippet) = format_args.span.get_source_text(cx) else {
                         return;
                     };
                     let s_expand = snippet.replace("{{", "{").replace("}}", "}");

clippy_lints/src/format_args.rs

@@ -7,7 +7,7 @@ use clippy_utils::macros::{
     find_format_arg_expr, format_arg_removal_span, format_placeholder_format_span, is_assert_macro, is_format_macro,
     is_panic, matching_root_macro_call, root_macro_call_first_node, FormatArgsStorage, FormatParamUsage, MacroCall,
 };
-use clippy_utils::source::snippet_opt;
+use clippy_utils::source::SpanRangeExt;
 use clippy_utils::ty::{implements_trait, is_type_lang_item};
 use itertools::Itertools;
 use rustc_ast::{
@@ -407,7 +407,7 @@ impl<'a, 'tcx> FormatArgsExpr<'a, 'tcx> {
                 count_needed_derefs(receiver_ty, cx.typeck_results().expr_adjustments(receiver).iter())
             && implements_trait(cx, target, display_trait_id, &[])
             && let Some(sized_trait_id) = cx.tcx.lang_items().sized_trait()
-            && let Some(receiver_snippet) = snippet_opt(cx, receiver.span.source_callsite())
+            && let Some(receiver_snippet) = receiver.span.source_callsite().get_source_text(cx)
         {
             let needs_ref = !implements_trait(cx, receiver_ty, sized_trait_id, &[]);
             if n_needed_derefs == 0 && !needs_ref {

clippy_lints/src/from_over_into.rs

@@ -3,7 +3,7 @@ use clippy_config::Conf;
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::macros::span_is_local;
 use clippy_utils::path_def_id;
-use clippy_utils::source::snippet_opt;
+use clippy_utils::source::SpanRangeExt;
 use rustc_errors::Applicability;
 use rustc_hir::intravisit::{walk_path, Visitor};
 use rustc_hir::{
@@ -178,8 +178,8 @@ fn convert_to_from(
         return None;
     };
 
-    let from = snippet_opt(cx, self_ty.span)?;
-    let into = snippet_opt(cx, target_ty.span)?;
+    let from = self_ty.span.get_source_text(cx)?;
+    let into = target_ty.span.get_source_text(cx)?;
 
     let return_type = matches!(sig.decl.output, FnRetTy::Return(_))
         .then_some(String::from("Self"))
@@ -190,10 +190,10 @@ fn convert_to_from(
         (into_trait_seg.ident.span, String::from("From")),
         // impl Into<T> for U  ->  impl Into<U> for U
         //           ~                       ~
-        (target_ty.span, from.clone()),
+        (target_ty.span, from.to_owned()),
         // impl Into<T> for U  ->  impl Into<T> for T
         //                  ~                       ~
-        (self_ty.span, into),
+        (self_ty.span, into.to_owned()),
         // fn into(self) -> T  ->  fn from(self) -> T
         //    ~~~~                    ~~~~
         (impl_item.ident.span, String::from("from")),
@@ -223,7 +223,7 @@ fn convert_to_from(
     }
 
     for span in finder.upper {
-        suggestions.push((span, from.clone()));
+        suggestions.push((span, from.to_owned()));
     }
     for span in finder.lower {
         suggestions.push((span, String::from("val")));

clippy_lints/src/int_plus_one.rs

@@ -1,5 +1,5 @@
 use clippy_utils::diagnostics::span_lint_and_sugg;
-use clippy_utils::source::snippet_opt;
+use clippy_utils::source::SpanRangeExt;
 use rustc_ast::ast::{BinOpKind, Expr, ExprKind, LitKind};
 use rustc_ast::token;
 use rustc_errors::Applicability;
@@ -130,8 +130,8 @@ impl IntPlusOne {
             BinOpKind::Le => "<",
             _ => return None,
         };
-        if let Some(snippet) = snippet_opt(cx, node.span) {
-            if let Some(other_side_snippet) = snippet_opt(cx, other_side.span) {
+        if let Some(snippet) = node.span.get_source_text(cx) {
+            if let Some(other_side_snippet) = other_side.span.get_source_text(cx) {
                 let rec = match side {
                     Side::Lhs => Some(format!("{snippet} {binop_string} {other_side_snippet}")),
                     Side::Rhs => Some(format!("{other_side_snippet} {binop_string} {snippet}")),

clippy_lints/src/items_after_test_module.rs

@@ -1,5 +1,5 @@
 use clippy_utils::diagnostics::span_lint_hir_and_then;
-use clippy_utils::source::snippet_opt;
+use clippy_utils::source::SpanRangeExt;
 use clippy_utils::{fulfill_or_allowed, is_cfg_test, is_from_proc_macro};
 use rustc_errors::{Applicability, SuggestionStyle};
 use rustc_hir::{HirId, Item, ItemKind, Mod};
@@ -93,11 +93,14 @@ impl LateLintPass<'_> for ItemsAfterTestModule {
                     if let Some(prev) = mod_pos.checked_sub(1)
                         && let prev = cx.tcx.hir().item(module.item_ids[prev])
                         && let items_span = last.span.with_lo(test_mod.span.hi())
-                        && let Some(items) = snippet_opt(cx, items_span)
+                        && let Some(items) = items_span.get_source_text(cx)
                     {
                         diag.multipart_suggestion_with_style(
                             "move the items to before the test module was defined",
-                            vec![(prev.span.shrink_to_hi(), items), (items_span, String::new())],
+                            vec![
+                                (prev.span.shrink_to_hi(), items.to_owned()),
+                                (items_span, String::new()),
+                            ],
                             Applicability::MachineApplicable,
                             SuggestionStyle::HideCodeAlways,
                         );

clippy_lints/src/large_stack_frames.rs

@@ -3,7 +3,7 @@ use std::{fmt, ops};
 use clippy_config::Conf;
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::fn_has_unsatisfiable_preds;
-use clippy_utils::source::snippet_opt;
+use clippy_utils::source::SpanRangeExt;
 use rustc_hir::def_id::LocalDefId;
 use rustc_hir::intravisit::FnKind;
 use rustc_hir::{Body, FnDecl};
@@ -186,7 +186,7 @@ impl<'tcx> LateLintPass<'tcx> for LargeStackFrames {
                         // TODO: Is there a cleaner, robust way to ask this question?
                         // The obvious `LocalDecl::is_user_variable()` panics on "unwrapping cross-crate data",
                         // and that doesn't get us the true name in scope rather than the span text either.
-                        if let Some(name) = snippet_opt(cx, local_span)
+                        if let Some(name) = local_span.get_source_text(cx)
                             && is_ident(&name)
                         {
                             // If the local is an ordinary named variable,

clippy_lints/src/len_zero.rs

@@ -1,5 +1,5 @@
 use clippy_utils::diagnostics::{span_lint, span_lint_and_sugg, span_lint_and_then};
-use clippy_utils::source::{snippet_opt, snippet_with_context};
+use clippy_utils::source::{snippet_with_context, SpanRangeExt};
 use clippy_utils::sugg::{has_enclosing_paren, Sugg};
 use clippy_utils::{get_item_name, get_parent_as_impl, is_lint_allowed, peel_ref_operators};
 use rustc_ast::ast::LitKind;
@@ -216,7 +216,7 @@ impl<'tcx> LateLintPass<'tcx> for LenZero {
 }
 
 fn span_without_enclosing_paren(cx: &LateContext<'_>, span: Span) -> Span {
-    let Some(snippet) = snippet_opt(cx, span) else {
+    let Some(snippet) = span.get_source_text(cx) else {
         return span;
     };
     if has_enclosing_paren(snippet) {

clippy_lints/src/literal_representation.rs

@@ -1,7 +1,7 @@
 use clippy_config::Conf;
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::numeric_literal::{NumericLiteral, Radix};
-use clippy_utils::source::snippet_opt;
+use clippy_utils::source::SpanRangeExt;
 use rustc_ast::ast::{Expr, ExprKind, LitKind};
 use rustc_ast::token;
 use rustc_errors::Applicability;
@@ -225,7 +225,7 @@ impl LiteralDigitGrouping {
     }
 
     fn check_lit(&self, cx: &EarlyContext<'_>, lit: token::Lit, span: Span) {
-        if let Some(src) = snippet_opt(cx, span)
+        if let Some(src) = span.get_source_text(cx)
             && let Ok(lit_kind) = LitKind::from_token_lit(lit)
             && let Some(mut num_lit) = NumericLiteral::from_lit_kind(&src, &lit_kind)
         {
@@ -439,7 +439,7 @@ impl DecimalLiteralRepresentation {
         // Lint integral literals.
         if let Ok(lit_kind) = LitKind::from_token_lit(lit)
             && let LitKind::Int(val, _) = lit_kind
-            && let Some(src) = snippet_opt(cx, span)
+            && let Some(src) = span.get_source_text(cx)
             && let Some(num_lit) = NumericLiteral::from_lit_kind(&src, &lit_kind)
             && num_lit.radix == Radix::Decimal
             && val >= u128::from(self.threshold)