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Rollup merge of #102454 - chenyukang:fix-102396-missing-parentheses, r=lcnr
Suggest parentheses for possible range method calling Fixes #102396
This commit is contained in:
Matthias Krüger
GitHub
commit
66de34b035
@ -133,3 +133,7 @@ hir_analysis_extern_crate_not_idiomatic =
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.suggestion = convert it to a `{$msg_code}`
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hir_analysis_expected_used_symbol = expected `used`, `used(compiler)` or `used(linker)`
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hir_analysis_missing_parentheses_in_range = can't call method `{$method_name}` on type `{$ty_str}`
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hir_analysis_add_missing_parentheses_in_range = you must surround the range in parentheses to call its `{$func_name}` function
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@ -2,6 +2,7 @@
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//! found or is otherwise invalid.
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use crate::check::FnCtxt;
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use crate::errors;
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use rustc_ast::ast::Mutability;
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use rustc_data_structures::fx::{FxHashMap, FxHashSet};
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use rustc_errors::{
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@ -271,7 +272,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
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}
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};
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if self.suggest_constraining_numerical_ty(
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if self.suggest_wrapping_range_with_parens(
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tcx, actual, source, span, item_name, &ty_str,
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) || self.suggest_constraining_numerical_ty(
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tcx, actual, source, span, item_kind, item_name, &ty_str,
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) {
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return None;
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@ -1202,6 +1205,89 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
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false
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}
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/// Suggest possible range with adding parentheses, for example:
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/// when encountering `0..1.map(|i| i + 1)` suggest `(0..1).map(|i| i + 1)`.
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fn suggest_wrapping_range_with_parens(
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&self,
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tcx: TyCtxt<'tcx>,
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actual: Ty<'tcx>,
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source: SelfSource<'tcx>,
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span: Span,
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item_name: Ident,
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ty_str: &str,
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) -> bool {
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if let SelfSource::MethodCall(expr) = source {
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for (_, parent) in tcx.hir().parent_iter(expr.hir_id).take(5) {
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if let Node::Expr(parent_expr) = parent {
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let lang_item = match parent_expr.kind {
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ExprKind::Struct(ref qpath, _, _) => match **qpath {
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QPath::LangItem(LangItem::Range, ..) => Some(LangItem::Range),
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QPath::LangItem(LangItem::RangeTo, ..) => Some(LangItem::RangeTo),
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QPath::LangItem(LangItem::RangeToInclusive, ..) => {
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Some(LangItem::RangeToInclusive)
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}
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_ => None,
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},
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ExprKind::Call(ref func, _) => match func.kind {
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// `..=` desugars into `::std::ops::RangeInclusive::new(...)`.
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ExprKind::Path(QPath::LangItem(LangItem::RangeInclusiveNew, ..)) => {
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Some(LangItem::RangeInclusiveStruct)
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}
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_ => None,
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},
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_ => None,
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};
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if lang_item.is_none() {
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continue;
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}
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let span_included = match parent_expr.kind {
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hir::ExprKind::Struct(_, eps, _) => {
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eps.len() > 0 && eps.last().map_or(false, |ep| ep.span.contains(span))
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}
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// `..=` desugars into `::std::ops::RangeInclusive::new(...)`.
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hir::ExprKind::Call(ref func, ..) => func.span.contains(span),
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_ => false,
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};
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if !span_included {
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continue;
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}
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let range_def_id = self.tcx.require_lang_item(lang_item.unwrap(), None);
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let range_ty =
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self.tcx.bound_type_of(range_def_id).subst(self.tcx, &[actual.into()]);
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let pick = self.probe_for_name(
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span,
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Mode::MethodCall,
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item_name,
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IsSuggestion(true),
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range_ty,
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expr.hir_id,
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ProbeScope::AllTraits,
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);
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if pick.is_ok() {
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let range_span = parent_expr.span.with_hi(expr.span.hi());
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tcx.sess.emit_err(errors::MissingParentheseInRange {
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span,
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ty_str: ty_str.to_string(),
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method_name: item_name.as_str().to_string(),
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add_missing_parentheses: Some(errors::AddMissingParenthesesInRange {
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func_name: item_name.name.as_str().to_string(),
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left: range_span.shrink_to_lo(),
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right: range_span.shrink_to_hi(),
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}),
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});
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return true;
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}
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}
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}
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}
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false
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}
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fn suggest_constraining_numerical_ty(
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&self,
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tcx: TyCtxt<'tcx>,
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@ -1264,7 +1350,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
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// If this is a floating point literal that ends with '.',
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// get rid of it to stop this from becoming a member access.
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let snippet = snippet.strip_suffix('.').unwrap_or(&snippet);
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err.span_suggestion(
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lit.span,
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&format!(
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@ -346,3 +346,29 @@ pub struct ExpectedUsedSymbol {
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#[primary_span]
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pub span: Span,
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}
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#[derive(Diagnostic)]
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#[diag(hir_analysis::missing_parentheses_in_range, code = "E0689")]
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pub struct MissingParentheseInRange {
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#[primary_span]
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#[label(hir_analysis::missing_parentheses_in_range)]
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pub span: Span,
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pub ty_str: String,
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pub method_name: String,
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#[subdiagnostic]
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pub add_missing_parentheses: Option<AddMissingParenthesesInRange>,
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}
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#[derive(Subdiagnostic)]
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#[multipart_suggestion_verbose(
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hir_analysis::add_missing_parentheses_in_range,
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applicability = "maybe-incorrect"
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)]
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pub struct AddMissingParenthesesInRange {
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pub func_name: String,
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#[suggestion_part(code = "(")]
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pub left: Span,
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#[suggestion_part(code = ")")]
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pub right: Span,
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}
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@ -1,7 +1,76 @@
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#![allow(unused)]
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fn main() {
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let arr = &[0,1,2,3];
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for _i in 0..arr.len().rev() { //~ERROR not an iterator
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let arr = &[0, 1, 2, 3];
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for _i in 0..arr.len().rev() {
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//~^ ERROR can't call method
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//~| surround the range in parentheses
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// The above error used to say “the method `rev` exists for type `usize`”.
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// This regression test ensures it doesn't say that any more.
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}
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// Test for #102396
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for i in 1..11.rev() {
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//~^ ERROR can't call method
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//~| HELP surround the range in parentheses
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}
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let end: usize = 10;
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for i in 1..end.rev() {
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//~^ ERROR can't call method
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//~| HELP surround the range in parentheses
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}
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for i in 1..(end + 1).rev() {
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//~^ ERROR can't call method
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//~| HELP surround the range in parentheses
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}
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if 1..(end + 1).is_empty() {
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//~^ ERROR can't call method
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//~| ERROR mismatched types [E0308]
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//~| HELP surround the range in parentheses
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}
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if 1..(end + 1).is_sorted() {
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//~^ ERROR mismatched types [E0308]
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//~| ERROR can't call method
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//~| HELP surround the range in parentheses
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}
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let _res: i32 = 3..6.take(2).sum();
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//~^ ERROR can't call method
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//~| ERROR mismatched types [E0308]
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//~| HELP surround the range in parentheses
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let _sum: i32 = 3..6.sum();
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//~^ ERROR can't call method
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//~| ERROR mismatched types [E0308]
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//~| HELP surround the range in parentheses
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let a = 1 as usize;
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let b = 10 as usize;
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for _a in a..=b.rev() {
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//~^ ERROR can't call method
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//~| HELP surround the range in parentheses
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}
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let _res = ..10.contains(3);
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//~^ ERROR can't call method
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//~| HELP surround the range in parentheses
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if 1..end.error_method() {
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//~^ ERROR no method named `error_method`
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//~| ERROR mismatched types [E0308]
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// Won't suggest
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}
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let _res = b.take(1)..a;
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//~^ ERROR `usize` is not an iterator
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let _res: i32 = ..6.take(2).sum();
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//~^ can't call method `take` on ambiguous numeric type
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//~| ERROR mismatched types [E0308]
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//~| HELP you must specify a concrete type for this numeric value
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// Won't suggest because `RangeTo` dest not implemented `take`
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}
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@ -1,13 +1,201 @@
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error[E0599]: `usize` is not an iterator
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--> $DIR/issue-90315.rs:3:26
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error[E0689]: can't call method `rev` on type `usize`
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--> $DIR/issue-90315.rs:4:28
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LL | for _i in 0..arr.len().rev() {
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| ^^^ `usize` is not an iterator
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| ^^^ can't call method `rev` on type `usize`
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help: you must surround the range in parentheses to call its `rev` function
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LL | for _i in (0..arr.len()).rev() {
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| + +
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error[E0689]: can't call method `rev` on type `{integer}`
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--> $DIR/issue-90315.rs:12:20
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LL | for i in 1..11.rev() {
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| ^^^ can't call method `rev` on type `{integer}`
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help: you must surround the range in parentheses to call its `rev` function
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LL | for i in (1..11).rev() {
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| + +
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error[E0689]: can't call method `rev` on type `usize`
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--> $DIR/issue-90315.rs:18:21
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LL | for i in 1..end.rev() {
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| ^^^ can't call method `rev` on type `usize`
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help: you must surround the range in parentheses to call its `rev` function
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LL | for i in (1..end).rev() {
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| + +
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error[E0689]: can't call method `rev` on type `usize`
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--> $DIR/issue-90315.rs:23:27
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LL | for i in 1..(end + 1).rev() {
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| ^^^ can't call method `rev` on type `usize`
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help: you must surround the range in parentheses to call its `rev` function
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LL | for i in (1..(end + 1)).rev() {
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| + +
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error[E0689]: can't call method `is_empty` on type `usize`
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--> $DIR/issue-90315.rs:28:21
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LL | if 1..(end + 1).is_empty() {
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| ^^^^^^^^ can't call method `is_empty` on type `usize`
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help: you must surround the range in parentheses to call its `is_empty` function
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LL | if (1..(end + 1)).is_empty() {
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| + +
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error[E0308]: mismatched types
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--> $DIR/issue-90315.rs:28:8
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LL | if 1..(end + 1).is_empty() {
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| ^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found struct `std::ops::Range`
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= note: expected type `bool`
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found struct `std::ops::Range<{integer}>`
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error[E0689]: can't call method `is_sorted` on type `usize`
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--> $DIR/issue-90315.rs:34:21
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LL | if 1..(end + 1).is_sorted() {
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| ^^^^^^^^^ can't call method `is_sorted` on type `usize`
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help: you must surround the range in parentheses to call its `is_sorted` function
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LL | if (1..(end + 1)).is_sorted() {
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| + +
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error[E0308]: mismatched types
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--> $DIR/issue-90315.rs:34:8
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LL | if 1..(end + 1).is_sorted() {
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| ^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found struct `std::ops::Range`
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= note: expected type `bool`
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found struct `std::ops::Range<{integer}>`
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error[E0689]: can't call method `take` on type `{integer}`
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--> $DIR/issue-90315.rs:40:26
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LL | let _res: i32 = 3..6.take(2).sum();
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| ^^^^ can't call method `take` on type `{integer}`
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|
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help: you must surround the range in parentheses to call its `take` function
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LL | let _res: i32 = (3..6).take(2).sum();
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| + +
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error[E0308]: mismatched types
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--> $DIR/issue-90315.rs:40:21
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LL | let _res: i32 = 3..6.take(2).sum();
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| --- ^^^^^^^^^^^^^^^^^^ expected `i32`, found struct `std::ops::Range`
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| |
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| expected due to this
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|
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= note: expected type `i32`
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found struct `std::ops::Range<{integer}>`
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error[E0689]: can't call method `sum` on type `{integer}`
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--> $DIR/issue-90315.rs:45:26
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|
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LL | let _sum: i32 = 3..6.sum();
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| ^^^ can't call method `sum` on type `{integer}`
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|
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help: you must surround the range in parentheses to call its `sum` function
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|
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LL | let _sum: i32 = (3..6).sum();
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| + +
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error[E0308]: mismatched types
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--> $DIR/issue-90315.rs:45:21
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|
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LL | let _sum: i32 = 3..6.sum();
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| --- ^^^^^^^^^^ expected `i32`, found struct `std::ops::Range`
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| |
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| expected due to this
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|
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= note: expected type `i32`
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found struct `std::ops::Range<{integer}>`
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error[E0689]: can't call method `rev` on type `usize`
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--> $DIR/issue-90315.rs:53:21
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|
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LL | for _a in a..=b.rev() {
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| ^^^ can't call method `rev` on type `usize`
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|
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help: you must surround the range in parentheses to call its `rev` function
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|
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LL | for _a in (a..=b).rev() {
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| + +
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error[E0689]: can't call method `contains` on type `{integer}`
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--> $DIR/issue-90315.rs:58:21
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|
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LL | let _res = ..10.contains(3);
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| ^^^^^^^^ can't call method `contains` on type `{integer}`
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|
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help: you must surround the range in parentheses to call its `contains` function
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|
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LL | let _res = (..10).contains(3);
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| + +
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error[E0599]: no method named `error_method` found for type `usize` in the current scope
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--> $DIR/issue-90315.rs:62:15
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|
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LL | if 1..end.error_method() {
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| ^^^^^^^^^^^^ method not found in `usize`
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error[E0308]: mismatched types
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--> $DIR/issue-90315.rs:62:8
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|
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LL | if 1..end.error_method() {
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| ^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found struct `std::ops::Range`
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|
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= note: expected type `bool`
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found struct `std::ops::Range<{integer}>`
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error[E0599]: `usize` is not an iterator
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--> $DIR/issue-90315.rs:68:18
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|
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LL | let _res = b.take(1)..a;
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| ^^^^ `usize` is not an iterator
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|
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= note: the following trait bounds were not satisfied:
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`usize: Iterator`
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which is required by `&mut usize: Iterator`
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error: aborting due to previous error
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error[E0689]: can't call method `take` on ambiguous numeric type `{integer}`
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--> $DIR/issue-90315.rs:71:25
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|
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LL | let _res: i32 = ..6.take(2).sum();
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| ^^^^
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|
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help: you must specify a concrete type for this numeric value, like `i32`
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|
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LL | let _res: i32 = ..6_i32.take(2).sum();
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| ~~~~~
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For more information about this error, try `rustc --explain E0599`.
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error[E0308]: mismatched types
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--> $DIR/issue-90315.rs:71:21
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|
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LL | let _res: i32 = ..6.take(2).sum();
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| --- ^^^^^^^^^^^^^^^^^ expected `i32`, found struct `RangeTo`
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| |
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| expected due to this
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|
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= note: expected type `i32`
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found struct `RangeTo<_>`
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error: aborting due to 19 previous errors
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Some errors have detailed explanations: E0308, E0599, E0689.
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For more information about an error, try `rustc --explain E0308`.
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