Auto merge of rust-lang#13443 - SpriteOvO:simplify-option-neg-methods, r=xFrednet

Simplify negative `Option::{is_some_and,is_none_or}`

Closes rust-lang#13436.

Improved based on the existing lint `nonminimal_bool`, since there is already handling of similar methods `Option::{is_some,is_none}` and `Result::{is_ok,is_err}`, and there is a lot of reusable code.

When `is_some_and` or `is_none_or` have a negation, we invert it into another method by removing the Not sign and inverting the expression in the closure.

For the case where the closure block has statements, currently no simplification is implemented. (Should we do it?)

```rust
// Currently will not simplify this
_ = !opt.is_some_and(|x| {
    let complex_block = 100;
    x == complex_block
});
```

changelog: [`nonminimal_bool`]: Simplify negative `Option::{is_some_and,is_none_or}`

Author: bors

clippy_config/src/msrvs.rs

@@ -19,6 +19,7 @@ macro_rules! msrv_aliases {
 msrv_aliases! {
     1,83,0 { CONST_EXTERN_FN }
     1,83,0 { CONST_FLOAT_BITS_CONV }
+    1,82,0 { IS_NONE_OR }
     1,81,0 { LINT_REASONS_STABILIZATION }
     1,80,0 { BOX_INTO_ITER}
     1,77,0 { C_STR_LITERALS }

clippy_lints/src/booleans.rs

@@ -1,3 +1,5 @@
+use clippy_config::Conf;
+use clippy_config::msrvs::{self, Msrv};
 use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_hir_and_then};
 use clippy_utils::eq_expr_value;
 use clippy_utils::source::SpanRangeExt;
@@ -7,7 +9,7 @@ use rustc_errors::Applicability;
 use rustc_hir::intravisit::{FnKind, Visitor, walk_expr};
 use rustc_hir::{BinOpKind, Body, Expr, ExprKind, FnDecl, UnOp};
 use rustc_lint::{LateContext, LateLintPass, Level};
-use rustc_session::declare_lint_pass;
+use rustc_session::{RustcVersion, impl_lint_pass};
 use rustc_span::def_id::LocalDefId;
 use rustc_span::{Span, sym};
 
@@ -69,9 +71,25 @@ declare_clippy_lint! {
 }
 
 // For each pairs, both orders are considered.
-const METHODS_WITH_NEGATION: [(&str, &str); 2] = [("is_some", "is_none"), ("is_err", "is_ok")];
+const METHODS_WITH_NEGATION: [(Option<RustcVersion>, &str, &str); 3] = [
+    (None, "is_some", "is_none"),
+    (None, "is_err", "is_ok"),
+    (Some(msrvs::IS_NONE_OR), "is_some_and", "is_none_or"),
+];
+
+pub struct NonminimalBool {
+    msrv: Msrv,
+}
+
+impl NonminimalBool {
+    pub fn new(conf: &'static Conf) -> Self {
+        Self {
+            msrv: conf.msrv.clone(),
+        }
+    }
+}
 
-declare_lint_pass!(NonminimalBool => [NONMINIMAL_BOOL, OVERLY_COMPLEX_BOOL_EXPR]);
+impl_lint_pass!(NonminimalBool => [NONMINIMAL_BOOL, OVERLY_COMPLEX_BOOL_EXPR]);
 
 impl<'tcx> LateLintPass<'tcx> for NonminimalBool {
     fn check_fn(
@@ -83,7 +101,7 @@ impl<'tcx> LateLintPass<'tcx> for NonminimalBool {
         _: Span,
         _: LocalDefId,
     ) {
-        NonminimalBoolVisitor { cx }.visit_body(body);
+        NonminimalBoolVisitor { cx, msrv: &self.msrv }.visit_body(body);
     }
 
     fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) {
@@ -100,6 +118,8 @@ impl<'tcx> LateLintPass<'tcx> for NonminimalBool {
             _ => {},
         }
     }
+
+    extract_msrv_attr!(LateContext);
 }
 
 fn inverted_bin_op_eq_str(op: BinOpKind) -> Option<&'static str> {
@@ -176,11 +196,11 @@ fn check_inverted_bool_in_condition(
     );
 }
 
-fn check_simplify_not(cx: &LateContext<'_>, expr: &Expr<'_>) {
+fn check_simplify_not(cx: &LateContext<'_>, msrv: &Msrv, expr: &Expr<'_>) {
     if let ExprKind::Unary(UnOp::Not, inner) = &expr.kind
         && !expr.span.from_expansion()
         && !inner.span.from_expansion()
-        && let Some(suggestion) = simplify_not(cx, inner)
+        && let Some(suggestion) = simplify_not(cx, msrv, inner)
         && cx.tcx.lint_level_at_node(NONMINIMAL_BOOL, expr.hir_id).0 != Level::Allow
     {
         span_lint_and_sugg(
@@ -197,6 +217,7 @@ fn check_simplify_not(cx: &LateContext<'_>, expr: &Expr<'_>) {
 
 struct NonminimalBoolVisitor<'a, 'tcx> {
     cx: &'a LateContext<'tcx>,
+    msrv: &'a Msrv,
 }
 
 use quine_mc_cluskey::Bool;
@@ -289,6 +310,7 @@ impl<'v> Hir2Qmm<'_, '_, 'v> {
 struct SuggestContext<'a, 'tcx, 'v> {
     terminals: &'v [&'v Expr<'v>],
     cx: &'a LateContext<'tcx>,
+    msrv: &'a Msrv,
     output: String,
 }
 
@@ -311,7 +333,7 @@ impl SuggestContext<'_, '_, '_> {
                 },
                 Term(n) => {
                     let terminal = self.terminals[n as usize];
-                    if let Some(str) = simplify_not(self.cx, terminal) {
+                    if let Some(str) = simplify_not(self.cx, self.msrv, terminal) {
                         self.output.push_str(&str);
                     } else {
                         self.output.push('!');
@@ -358,7 +380,7 @@ impl SuggestContext<'_, '_, '_> {
     }
 }
 
-fn simplify_not(cx: &LateContext<'_>, expr: &Expr<'_>) -> Option<String> {
+fn simplify_not(cx: &LateContext<'_>, curr_msrv: &Msrv, expr: &Expr<'_>) -> Option<String> {
     match &expr.kind {
         ExprKind::Binary(binop, lhs, rhs) => {
             if !implements_ord(cx, lhs) {
@@ -389,7 +411,7 @@ fn simplify_not(cx: &LateContext<'_>, expr: &Expr<'_>) -> Option<String> {
                 Some(format!("{lhs_snippet}{op}{rhs_snippet}"))
             })
         },
-        ExprKind::MethodCall(path, receiver, [], _) => {
+        ExprKind::MethodCall(path, receiver, args, _) => {
             let type_of_receiver = cx.typeck_results().expr_ty(receiver);
             if !is_type_diagnostic_item(cx, type_of_receiver, sym::Option)
                 && !is_type_diagnostic_item(cx, type_of_receiver, sym::Result)
@@ -399,21 +421,41 @@ fn simplify_not(cx: &LateContext<'_>, expr: &Expr<'_>) -> Option<String> {
             METHODS_WITH_NEGATION
                 .iter()
                 .copied()
-                .flat_map(|(a, b)| vec![(a, b), (b, a)])
-                .find(|&(a, _)| {
-                    let path: &str = path.ident.name.as_str();
-                    a == path
+                .flat_map(|(msrv, a, b)| vec![(msrv, a, b), (msrv, b, a)])
+                .find(|&(msrv, a, _)| msrv.is_none_or(|msrv| curr_msrv.meets(msrv)) && a == path.ident.name.as_str())
+                .and_then(|(_, _, neg_method)| {
+                    let negated_args = args
+                        .iter()
+                        .map(|arg| simplify_not(cx, curr_msrv, arg))
+                        .collect::<Option<Vec<_>>>()?
+                        .join(", ");
+                    Some(format!(
+                        "{}.{neg_method}({negated_args})",
+                        receiver.span.get_source_text(cx)?
+                    ))
                 })
-                .and_then(|(_, neg_method)| Some(format!("{}.{neg_method}()", receiver.span.get_source_text(cx)?)))
         },
+        ExprKind::Closure(closure) => {
+            let body = cx.tcx.hir().body(closure.body);
+            let params = body
+                .params
+                .iter()
+                .map(|param| param.span.get_source_text(cx).map(|t| t.to_string()))
+                .collect::<Option<Vec<_>>>()?
+                .join(", ");
+            let negated = simplify_not(cx, curr_msrv, body.value)?;
+            Some(format!("|{params}| {negated}"))
+        },
+        ExprKind::Unary(UnOp::Not, expr) => expr.span.get_source_text(cx).map(|t| t.to_string()),
         _ => None,
     }
 }
 
-fn suggest(cx: &LateContext<'_>, suggestion: &Bool, terminals: &[&Expr<'_>]) -> String {
+fn suggest(cx: &LateContext<'_>, msrv: &Msrv, suggestion: &Bool, terminals: &[&Expr<'_>]) -> String {
     let mut suggest_context = SuggestContext {
         terminals,
         cx,
+        msrv,
         output: String::new(),
     };
     suggest_context.recurse(suggestion);
@@ -526,7 +568,7 @@ impl<'tcx> NonminimalBoolVisitor<'_, 'tcx> {
                                 diag.span_suggestion(
                                     e.span,
                                     "it would look like the following",
-                                    suggest(self.cx, suggestion, &h2q.terminals),
+                                    suggest(self.cx, self.msrv, suggestion, &h2q.terminals),
                                     // nonminimal_bool can produce minimal but
                                     // not human readable expressions (#3141)
                                     Applicability::Unspecified,
@@ -569,12 +611,12 @@ impl<'tcx> NonminimalBoolVisitor<'_, 'tcx> {
                 }
             };
             if improvements.is_empty() {
-                check_simplify_not(self.cx, e);
+                check_simplify_not(self.cx, self.msrv, e);
             } else {
                 nonminimal_bool_lint(
                     improvements
                         .into_iter()
-                        .map(|suggestion| suggest(self.cx, suggestion, &h2q.terminals))
+                        .map(|suggestion| suggest(self.cx, self.msrv, suggestion, &h2q.terminals))
                         .collect(),
                 );
             }

clippy_lints/src/lib.rs

@@ -609,7 +609,7 @@ pub fn register_lints(store: &mut rustc_lint::LintStore, conf: &'static Conf) {
     store.register_late_pass(move |tcx| Box::new(await_holding_invalid::AwaitHolding::new(tcx, conf)));
     store.register_late_pass(|_| Box::new(serde_api::SerdeApi));
     store.register_late_pass(move |_| Box::new(types::Types::new(conf)));
-    store.register_late_pass(|_| Box::new(booleans::NonminimalBool));
+    store.register_late_pass(move |_| Box::new(booleans::NonminimalBool::new(conf)));
     store.register_late_pass(|_| Box::new(enum_clike::UnportableVariant));
     store.register_late_pass(|_| Box::new(float_literal::FloatLiteral));
     store.register_late_pass(|_| Box::new(ptr::Ptr));

tests/ui/nonminimal_bool_methods.fixed

@@ -115,4 +115,66 @@ fn issue_12625() {
     if a as u64 > b {} //~ ERROR: this boolean expression can be simplified
 }
 
+fn issue_13436() {
+    fn not_zero(x: i32) -> bool {
+        x != 0
+    }
+
+    let opt = Some(500);
+    _ = opt.is_some_and(|x| x < 1000);
+    _ = opt.is_some_and(|x| x <= 1000);
+    _ = opt.is_some_and(|x| x > 1000);
+    _ = opt.is_some_and(|x| x >= 1000);
+    _ = opt.is_some_and(|x| x == 1000);
+    _ = opt.is_some_and(|x| x != 1000);
+    _ = opt.is_some_and(not_zero);
+    _ = opt.is_none_or(|x| x >= 1000); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_none_or(|x| x > 1000); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_none_or(|x| x <= 1000); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_none_or(|x| x < 1000); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_none_or(|x| x != 1000); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_none_or(|x| x == 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_some_and(not_zero);
+    _ = opt.is_none_or(|x| x < 1000);
+    _ = opt.is_none_or(|x| x <= 1000);
+    _ = opt.is_none_or(|x| x > 1000);
+    _ = opt.is_none_or(|x| x >= 1000);
+    _ = opt.is_none_or(|x| x == 1000);
+    _ = opt.is_none_or(|x| x != 1000);
+    _ = opt.is_none_or(not_zero);
+    _ = opt.is_some_and(|x| x >= 1000); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_some_and(|x| x > 1000); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_some_and(|x| x <= 1000); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_some_and(|x| x < 1000); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_some_and(|x| x != 1000); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_some_and(|x| x == 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_none_or(not_zero);
+
+    let opt = Some(true);
+    _ = opt.is_some_and(|x| x);
+    _ = opt.is_some_and(|x| !x);
+    _ = !opt.is_some_and(|x| x);
+    _ = opt.is_none_or(|x| x); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_none_or(|x| x);
+    _ = opt.is_none_or(|x| !x);
+    _ = !opt.is_none_or(|x| x);
+    _ = opt.is_some_and(|x| x); //~ ERROR: this boolean expression can be simplified
+
+    let opt: Option<Result<i32, i32>> = Some(Ok(123));
+    _ = opt.is_some_and(|x| x.is_ok());
+    _ = opt.is_some_and(|x| x.is_err());
+    _ = opt.is_none_or(|x| x.is_ok());
+    _ = opt.is_none_or(|x| x.is_err());
+    _ = opt.is_none_or(|x| x.is_err()); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_none_or(|x| x.is_ok()); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_some_and(|x| x.is_err()); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_some_and(|x| x.is_ok()); //~ ERROR: this boolean expression can be simplified
+
+    #[clippy::msrv = "1.81"]
+    fn before_stabilization() {
+        let opt = Some(500);
+        _ = !opt.is_some_and(|x| x < 1000);
+    }
+}
+
 fn main() {}

tests/ui/nonminimal_bool_methods.rs

@@ -115,4 +115,66 @@ fn issue_12625() {
     if !(a as u64 <= b) {} //~ ERROR: this boolean expression can be simplified
 }
 
+fn issue_13436() {
+    fn not_zero(x: i32) -> bool {
+        x != 0
+    }
+
+    let opt = Some(500);
+    _ = opt.is_some_and(|x| x < 1000);
+    _ = opt.is_some_and(|x| x <= 1000);
+    _ = opt.is_some_and(|x| x > 1000);
+    _ = opt.is_some_and(|x| x >= 1000);
+    _ = opt.is_some_and(|x| x == 1000);
+    _ = opt.is_some_and(|x| x != 1000);
+    _ = opt.is_some_and(not_zero);
+    _ = !opt.is_some_and(|x| x < 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_some_and(|x| x <= 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_some_and(|x| x > 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_some_and(|x| x >= 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_some_and(|x| x == 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_some_and(|x| x != 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_some_and(not_zero);
+    _ = opt.is_none_or(|x| x < 1000);
+    _ = opt.is_none_or(|x| x <= 1000);
+    _ = opt.is_none_or(|x| x > 1000);
+    _ = opt.is_none_or(|x| x >= 1000);
+    _ = opt.is_none_or(|x| x == 1000);
+    _ = opt.is_none_or(|x| x != 1000);
+    _ = opt.is_none_or(not_zero);
+    _ = !opt.is_none_or(|x| x < 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_none_or(|x| x <= 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_none_or(|x| x > 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_none_or(|x| x >= 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_none_or(|x| x == 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_none_or(|x| x != 1000); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_none_or(not_zero);
+
+    let opt = Some(true);
+    _ = opt.is_some_and(|x| x);
+    _ = opt.is_some_and(|x| !x);
+    _ = !opt.is_some_and(|x| x);
+    _ = !opt.is_some_and(|x| !x); //~ ERROR: this boolean expression can be simplified
+    _ = opt.is_none_or(|x| x);
+    _ = opt.is_none_or(|x| !x);
+    _ = !opt.is_none_or(|x| x);
+    _ = !opt.is_none_or(|x| !x); //~ ERROR: this boolean expression can be simplified
+
+    let opt: Option<Result<i32, i32>> = Some(Ok(123));
+    _ = opt.is_some_and(|x| x.is_ok());
+    _ = opt.is_some_and(|x| x.is_err());
+    _ = opt.is_none_or(|x| x.is_ok());
+    _ = opt.is_none_or(|x| x.is_err());
+    _ = !opt.is_some_and(|x| x.is_ok()); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_some_and(|x| x.is_err()); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_none_or(|x| x.is_ok()); //~ ERROR: this boolean expression can be simplified
+    _ = !opt.is_none_or(|x| x.is_err()); //~ ERROR: this boolean expression can be simplified
+
+    #[clippy::msrv = "1.81"]
+    fn before_stabilization() {
+        let opt = Some(500);
+        _ = !opt.is_some_and(|x| x < 1000);
+    }
+}
+
 fn main() {}