Auto merge of rust-lang#10434 - Jarcho:snip_context, r=dswij

Remove `snippet_with_macro_callsite`

`snippet_with_context` is used instead to support nested macro calls.

changelog: None

Author: bors

clippy_lints/src/default.rs

@@ -1,5 +1,5 @@
 use clippy_utils::diagnostics::{span_lint_and_note, span_lint_and_sugg};
-use clippy_utils::source::snippet_with_macro_callsite;
+use clippy_utils::source::snippet_with_context;
 use clippy_utils::ty::{has_drop, is_copy};
 use clippy_utils::{
     any_parent_is_automatically_derived, contains_name, get_parent_expr, is_from_proc_macro, match_def_path, paths,
@@ -160,6 +160,8 @@ impl<'tcx> LateLintPass<'tcx> for Default {
                 }
             };
 
+            let init_ctxt = local.span.ctxt();
+
             // find all "later statement"'s where the fields of the binding set as
             // Default::default() get reassigned, unless the reassignment refers to the original binding
             let mut first_assign = None;
@@ -169,7 +171,7 @@ impl<'tcx> LateLintPass<'tcx> for Default {
                 // find out if and which field was set by this `consecutive_statement`
                 if let Some((field_ident, assign_rhs)) = field_reassigned_by_stmt(consecutive_statement, binding_name) {
                     // interrupt and cancel lint if assign_rhs references the original binding
-                    if contains_name(binding_name, assign_rhs, cx) {
+                    if contains_name(binding_name, assign_rhs, cx) || init_ctxt != consecutive_statement.span.ctxt() {
                         cancel_lint = true;
                         break;
                     }
@@ -204,11 +206,12 @@ impl<'tcx> LateLintPass<'tcx> for Default {
                     .iter()
                     .all(|field| assigned_fields.iter().any(|(a, _)| a == &field.name));
 
+                let mut app = Applicability::Unspecified;
                 let field_list = assigned_fields
                     .into_iter()
                     .map(|(field, rhs)| {
                         // extract and store the assigned value for help message
-                        let value_snippet = snippet_with_macro_callsite(cx, rhs.span, "..");
+                        let value_snippet = snippet_with_context(cx, rhs.span, init_ctxt, "..", &mut app).0;
                         format!("{field}: {value_snippet}")
                     })
                     .collect::<Vec<String>>()

clippy_lints/src/if_then_some_else_none.rs

@@ -1,8 +1,10 @@
 use clippy_utils::diagnostics::span_lint_and_help;
 use clippy_utils::eager_or_lazy::switch_to_eager_eval;
 use clippy_utils::msrvs::{self, Msrv};
-use clippy_utils::source::snippet_with_macro_callsite;
+use clippy_utils::source::snippet_with_context;
+use clippy_utils::sugg::Sugg;
 use clippy_utils::{contains_return, higher, is_else_clause, is_res_lang_ctor, path_res, peel_blocks};
+use rustc_errors::Applicability;
 use rustc_hir::LangItem::{OptionNone, OptionSome};
 use rustc_hir::{Expr, ExprKind, Stmt, StmtKind};
 use rustc_lint::{LateContext, LateLintPass, LintContext};
@@ -72,21 +74,20 @@ impl<'tcx> LateLintPass<'tcx> for IfThenSomeElseNone {
             return;
         }
 
+        let ctxt = expr.span.ctxt();
+
         if let Some(higher::If { cond, then, r#else: Some(els) }) = higher::If::hir(expr)
             && let ExprKind::Block(then_block, _) = then.kind
             && let Some(then_expr) = then_block.expr
             && let ExprKind::Call(then_call, [then_arg]) = then_expr.kind
+            && then_expr.span.ctxt() == ctxt
             && is_res_lang_ctor(cx, path_res(cx, then_call), OptionSome)
             && is_res_lang_ctor(cx, path_res(cx, peel_blocks(els)), OptionNone)
             && !stmts_contains_early_return(then_block.stmts)
         {
-            let cond_snip = snippet_with_macro_callsite(cx, cond.span, "[condition]");
-            let cond_snip = if matches!(cond.kind, ExprKind::Unary(_, _) | ExprKind::Binary(_, _, _)) {
-                format!("({cond_snip})")
-            } else {
-                cond_snip.into_owned()
-            };
-            let arg_snip = snippet_with_macro_callsite(cx, then_arg.span, "");
+            let mut app = Applicability::Unspecified;
+            let cond_snip = Sugg::hir_with_context(cx, cond, expr.span.ctxt(), "[condition]", &mut app).maybe_par().to_string();
+            let arg_snip = snippet_with_context(cx, then_arg.span, ctxt, "[body]", &mut app).0;
             let mut method_body = if then_block.stmts.is_empty() {
                 arg_snip.into_owned()
             } else {

clippy_lints/src/loops/same_item_push.rs

@@ -1,15 +1,17 @@
 use super::SAME_ITEM_PUSH;
 use clippy_utils::diagnostics::span_lint_and_help;
 use clippy_utils::path_to_local;
-use clippy_utils::source::snippet_with_macro_callsite;
+use clippy_utils::source::snippet_with_context;
 use clippy_utils::ty::{implements_trait, is_type_diagnostic_item};
 use if_chain::if_chain;
 use rustc_data_structures::fx::FxHashSet;
+use rustc_errors::Applicability;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::intravisit::{walk_expr, Visitor};
 use rustc_hir::{BindingAnnotation, Block, Expr, ExprKind, HirId, Mutability, Node, Pat, PatKind, Stmt, StmtKind};
 use rustc_lint::LateContext;
 use rustc_span::symbol::sym;
+use rustc_span::SyntaxContext;
 use std::iter::Iterator;
 
 /// Detects for loop pushing the same item into a Vec
@@ -20,9 +22,10 @@ pub(super) fn check<'tcx>(
     body: &'tcx Expr<'_>,
     _: &'tcx Expr<'_>,
 ) {
-    fn emit_lint(cx: &LateContext<'_>, vec: &Expr<'_>, pushed_item: &Expr<'_>) {
-        let vec_str = snippet_with_macro_callsite(cx, vec.span, "");
-        let item_str = snippet_with_macro_callsite(cx, pushed_item.span, "");
+    fn emit_lint(cx: &LateContext<'_>, vec: &Expr<'_>, pushed_item: &Expr<'_>, ctxt: SyntaxContext) {
+        let mut app = Applicability::Unspecified;
+        let vec_str = snippet_with_context(cx, vec.span, ctxt, "", &mut app).0;
+        let item_str = snippet_with_context(cx, pushed_item.span, ctxt, "", &mut app).0;
 
         span_lint_and_help(
             cx,
@@ -43,7 +46,7 @@ pub(super) fn check<'tcx>(
     walk_expr(&mut same_item_push_visitor, body);
     if_chain! {
         if same_item_push_visitor.should_lint();
-        if let Some((vec, pushed_item)) = same_item_push_visitor.vec_push;
+        if let Some((vec, pushed_item, ctxt)) = same_item_push_visitor.vec_push;
         let vec_ty = cx.typeck_results().expr_ty(vec);
         let ty = vec_ty.walk().nth(1).unwrap().expect_ty();
         if cx
@@ -69,11 +72,11 @@ pub(super) fn check<'tcx>(
                                 then {
                                     match init.kind {
                                         // immutable bindings that are initialized with literal
-                                        ExprKind::Lit(..) => emit_lint(cx, vec, pushed_item),
+                                        ExprKind::Lit(..) => emit_lint(cx, vec, pushed_item, ctxt),
                                         // immutable bindings that are initialized with constant
                                         ExprKind::Path(ref path) => {
                                             if let Res::Def(DefKind::Const, ..) = cx.qpath_res(path, init.hir_id) {
-                                                emit_lint(cx, vec, pushed_item);
+                                                emit_lint(cx, vec, pushed_item, ctxt);
                                             }
                                         }
                                         _ => {},
@@ -82,11 +85,11 @@ pub(super) fn check<'tcx>(
                             }
                         },
                         // constant
-                        Res::Def(DefKind::Const, ..) => emit_lint(cx, vec, pushed_item),
+                        Res::Def(DefKind::Const, ..) => emit_lint(cx, vec, pushed_item, ctxt),
                         _ => {},
                     }
                 },
-                ExprKind::Lit(..) => emit_lint(cx, vec, pushed_item),
+                ExprKind::Lit(..) => emit_lint(cx, vec, pushed_item, ctxt),
                 _ => {},
             }
         }
@@ -98,7 +101,7 @@ struct SameItemPushVisitor<'a, 'tcx> {
     non_deterministic_expr: bool,
     multiple_pushes: bool,
     // this field holds the last vec push operation visited, which should be the only push seen
-    vec_push: Option<(&'tcx Expr<'tcx>, &'tcx Expr<'tcx>)>,
+    vec_push: Option<(&'tcx Expr<'tcx>, &'tcx Expr<'tcx>, SyntaxContext)>,
     cx: &'a LateContext<'tcx>,
     used_locals: FxHashSet<HirId>,
 }
@@ -118,7 +121,7 @@ impl<'a, 'tcx> SameItemPushVisitor<'a, 'tcx> {
         if_chain! {
             if !self.non_deterministic_expr;
             if !self.multiple_pushes;
-            if let Some((vec, _)) = self.vec_push;
+            if let Some((vec, _, _)) = self.vec_push;
             if let Some(hir_id) = path_to_local(vec);
             then {
                 !self.used_locals.contains(&hir_id)
@@ -173,7 +176,10 @@ impl<'a, 'tcx> Visitor<'tcx> for SameItemPushVisitor<'a, 'tcx> {
 
 // Given some statement, determine if that statement is a push on a Vec. If it is, return
 // the Vec being pushed into and the item being pushed
-fn get_vec_push<'tcx>(cx: &LateContext<'tcx>, stmt: &'tcx Stmt<'_>) -> Option<(&'tcx Expr<'tcx>, &'tcx Expr<'tcx>)> {
+fn get_vec_push<'tcx>(
+    cx: &LateContext<'tcx>,
+    stmt: &'tcx Stmt<'_>,
+) -> Option<(&'tcx Expr<'tcx>, &'tcx Expr<'tcx>, SyntaxContext)> {
     if_chain! {
             // Extract method being called
             if let StmtKind::Semi(semi_stmt) = &stmt.kind;
@@ -184,7 +190,7 @@ fn get_vec_push<'tcx>(cx: &LateContext<'tcx>, stmt: &'tcx Stmt<'_>) -> Option<(&
             if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(self_expr), sym::Vec);
             if path.ident.name.as_str() == "push";
             then {
-                return Some((self_expr, pushed_item))
+                return Some((self_expr, pushed_item, semi_stmt.span.ctxt()))
             }
     }
     None

clippy_lints/src/matches/manual_unwrap_or.rs

@@ -32,14 +32,8 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'tcx>, scrutinee:
             let reindented_or_body =
                 reindent_multiline(or_body_snippet.into(), true, Some(indent));
 
-            let suggestion = if scrutinee.span.from_expansion() {
-                    // we don't want parentheses around macro, e.g. `(some_macro!()).unwrap_or(0)`
-                    sugg::Sugg::hir_with_macro_callsite(cx, scrutinee, "..")
-                }
-                else {
-                    sugg::Sugg::hir(cx, scrutinee, "..").maybe_par()
-                };
-
+            let mut app = Applicability::MachineApplicable;
+            let suggestion = sugg::Sugg::hir_with_context(cx, scrutinee, expr.span.ctxt(), "..", &mut app).maybe_par();
             span_lint_and_sugg(
                 cx,
                 MANUAL_UNWRAP_OR, expr.span,
@@ -48,7 +42,7 @@ pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'tcx>, scrutinee:
                 format!(
                     "{suggestion}.unwrap_or({reindented_or_body})",
                 ),
-                Applicability::MachineApplicable,
+                app,
             );
         }
     }

clippy_lints/src/matches/match_bool.rs

@@ -10,9 +10,9 @@ use rustc_middle::ty;
 
 use super::MATCH_BOOL;
 
-pub(crate) fn check(cx: &LateContext<'_>, ex: &Expr<'_>, arms: &[Arm<'_>], expr: &Expr<'_>) {
+pub(crate) fn check(cx: &LateContext<'_>, scrutinee: &Expr<'_>, arms: &[Arm<'_>], expr: &Expr<'_>) {
     // Type of expression is `bool`.
-    if *cx.typeck_results().expr_ty(ex).kind() == ty::Bool {
+    if *cx.typeck_results().expr_ty(scrutinee).kind() == ty::Bool {
         span_lint_and_then(
             cx,
             MATCH_BOOL,
@@ -36,24 +36,26 @@ pub(crate) fn check(cx: &LateContext<'_>, ex: &Expr<'_>, arms: &[Arm<'_>], expr:
                     };
 
                     if let Some((true_expr, false_expr)) = exprs {
+                        let mut app = Applicability::HasPlaceholders;
+                        let ctxt = expr.span.ctxt();
                         let sugg = match (is_unit_expr(true_expr), is_unit_expr(false_expr)) {
                             (false, false) => Some(format!(
                                 "if {} {} else {}",
-                                snippet(cx, ex.span, "b"),
-                                expr_block(cx, true_expr, None, "..", Some(expr.span)),
-                                expr_block(cx, false_expr, None, "..", Some(expr.span))
+                                snippet(cx, scrutinee.span, "b"),
+                                expr_block(cx, true_expr, ctxt, "..", Some(expr.span), &mut app),
+                                expr_block(cx, false_expr, ctxt, "..", Some(expr.span), &mut app)
                             )),
                             (false, true) => Some(format!(
                                 "if {} {}",
-                                snippet(cx, ex.span, "b"),
-                                expr_block(cx, true_expr, None, "..", Some(expr.span))
+                                snippet(cx, scrutinee.span, "b"),
+                                expr_block(cx, true_expr, ctxt, "..", Some(expr.span), &mut app)
                             )),
                             (true, false) => {
-                                let test = Sugg::hir(cx, ex, "..");
+                                let test = Sugg::hir(cx, scrutinee, "..");
                                 Some(format!(
                                     "if {} {}",
                                     !test,
-                                    expr_block(cx, false_expr, None, "..", Some(expr.span))
+                                    expr_block(cx, false_expr, ctxt, "..", Some(expr.span), &mut app)
                                 ))
                             },
                             (true, true) => None,

clippy_lints/src/matches/match_ref_pats.rs

@@ -1,13 +1,14 @@
 use clippy_utils::diagnostics::{multispan_sugg, span_lint_and_then};
-use clippy_utils::source::snippet;
+use clippy_utils::source::{snippet, walk_span_to_context};
 use clippy_utils::sugg::Sugg;
 use core::iter::once;
+use rustc_errors::Applicability;
 use rustc_hir::{BorrowKind, Expr, ExprKind, Mutability, Pat, PatKind};
 use rustc_lint::LateContext;
 
 use super::MATCH_REF_PATS;
 
-pub(crate) fn check<'a, 'b, I>(cx: &LateContext<'_>, ex: &Expr<'_>, pats: I, expr: &Expr<'_>)
+pub(crate) fn check<'a, 'b, I>(cx: &LateContext<'_>, scrutinee: &Expr<'_>, pats: I, expr: &Expr<'_>)
 where
     'b: 'a,
     I: Clone + Iterator<Item = &'a Pat<'b>>,
@@ -17,13 +18,28 @@ where
     }
 
     let (first_sugg, msg, title);
-    let span = ex.span.source_callsite();
-    if let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner) = ex.kind {
-        first_sugg = once((span, Sugg::hir_with_macro_callsite(cx, inner, "..").to_string()));
+    let ctxt = expr.span.ctxt();
+    let mut app = Applicability::Unspecified;
+    if let ExprKind::AddrOf(BorrowKind::Ref, Mutability::Not, inner) = scrutinee.kind {
+        if scrutinee.span.ctxt() != ctxt {
+            return;
+        }
+        first_sugg = once((
+            scrutinee.span,
+            Sugg::hir_with_context(cx, inner, ctxt, "..", &mut app).to_string(),
+        ));
         msg = "try";
         title = "you don't need to add `&` to both the expression and the patterns";
     } else {
-        first_sugg = once((span, Sugg::hir_with_macro_callsite(cx, ex, "..").deref().to_string()));
+        let Some(span) = walk_span_to_context(scrutinee.span, ctxt) else {
+            return;
+        };
+        first_sugg = once((
+            span,
+            Sugg::hir_with_context(cx, scrutinee, ctxt, "..", &mut app)
+                .deref()
+                .to_string(),
+        ));
         msg = "instead of prefixing all patterns with `&`, you can dereference the expression";
         title = "you don't need to add `&` to all patterns";
     }