Add suggestions for expressions in patterns

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Lieselotte 2024-09-18 20:38:43 +02:00
parent c2047219b5
commit db09345ef6
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GPG Key ID: 68A9A951C7E1F283
15 changed files with 1145 additions and 95 deletions

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@ -571,6 +571,8 @@ pub enum StashKey {
/// Query cycle detected, stashing in favor of a better error.
Cycle,
UndeterminedMacroResolution,
/// Used by `Parser::maybe_recover_trailing_expr`
ExprInPat,
}
fn default_track_diagnostic<R>(diag: DiagInner, f: &mut dyn FnMut(DiagInner) -> R) -> R {

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@ -807,6 +807,14 @@ parse_unexpected_expr_in_pat =
.label = arbitrary expressions are not allowed in patterns
parse_unexpected_expr_in_pat_const_sugg = consider extracting the expression into a `const`
parse_unexpected_expr_in_pat_create_guard_sugg = consider moving the expression to a match arm guard
parse_unexpected_expr_in_pat_inline_const_sugg = consider wrapping the expression in an inline `const` (requires `{"#"}![feature(inline_const_pat)]`)
parse_unexpected_expr_in_pat_update_guard_sugg = consider moving the expression to the match arm guard
parse_unexpected_if_with_if = unexpected `if` in the condition expression
.suggestion = remove the `if`

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@ -1,3 +1,5 @@
// ignore-tidy-filelength
use std::borrow::Cow;
use rustc_ast::token::Token;
@ -2592,11 +2594,86 @@ pub(crate) struct ExpectedCommaAfterPatternField {
#[derive(Diagnostic)]
#[diag(parse_unexpected_expr_in_pat)]
pub(crate) struct UnexpectedExpressionInPattern {
/// The unexpected expr's span.
#[primary_span]
#[label]
pub span: Span,
/// Was a `RangePatternBound` expected?
pub is_bound: bool,
/// The unexpected expr's precedence (used in match arm guard suggestions).
pub expr_precedence: i8,
}
#[derive(Subdiagnostic)]
pub(crate) enum UnexpectedExpressionInPatternSugg {
#[multipart_suggestion(
parse_unexpected_expr_in_pat_create_guard_sugg,
applicability = "maybe-incorrect"
)]
CreateGuard {
/// Where to put the suggested identifier.
#[suggestion_part(code = "{ident}")]
ident_span: Span,
/// Where to put the match arm.
#[suggestion_part(code = " if {ident} == {expr}")]
pat_hi: Span,
/// The suggested identifier.
ident: String,
/// The unexpected expression.
expr: String,
},
#[multipart_suggestion(
parse_unexpected_expr_in_pat_update_guard_sugg,
applicability = "maybe-incorrect"
)]
UpdateGuard {
/// Where to put the suggested identifier.
#[suggestion_part(code = "{ident}")]
ident_span: Span,
/// The beginning of the match arm guard's expression (insert a `(` if `Some`).
#[suggestion_part(code = "(")]
guard_lo: Option<Span>,
/// The end of the match arm guard's expression.
#[suggestion_part(code = "{guard_hi_paren} && {ident} == {expr}")]
guard_hi: Span,
/// Either `")"` or `""`.
guard_hi_paren: &'static str,
/// The suggested identifier.
ident: String,
/// The unexpected expression.
expr: String,
},
#[multipart_suggestion(
parse_unexpected_expr_in_pat_const_sugg,
applicability = "has-placeholders"
)]
Const {
/// Where to put the extracted constant declaration.
#[suggestion_part(code = "{indentation}const {ident}: /* Type */ = {expr};\n")]
stmt_lo: Span,
/// Where to put the suggested identifier.
#[suggestion_part(code = "{ident}")]
ident_span: Span,
/// The suggested identifier.
ident: String,
/// The unexpected expression.
expr: String,
/// The statement's block's indentation.
indentation: String,
},
#[multipart_suggestion(
parse_unexpected_expr_in_pat_inline_const_sugg,
applicability = "maybe-incorrect"
)]
InlineConst {
#[suggestion_part(code = "const {{ ")]
start_span: Span,
#[suggestion_part(code = " }}")]
end_span: Span,
},
}
#[derive(Diagnostic)]

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@ -1,12 +1,14 @@
use rustc_ast::mut_visit::{walk_pat, MutVisitor};
use rustc_ast::mut_visit::{self, MutVisitor};
use rustc_ast::ptr::P;
use rustc_ast::token::{self, BinOpToken, Delimiter, IdentIsRaw, Token};
use rustc_ast::visit::{self, Visitor};
use rustc_ast::{
self as ast, AttrVec, BindingMode, ByRef, Expr, ExprKind, MacCall, Mutability, Pat, PatField,
PatFieldsRest, PatKind, Path, QSelf, RangeEnd, RangeSyntax,
self as ast, Arm, AttrVec, BinOpKind, BindingMode, ByRef, Expr, ExprKind, ExprPrecedence,
LocalKind, MacCall, Mutability, Pat, PatField, PatFieldsRest, PatKind, Path, QSelf, RangeEnd,
RangeSyntax, Stmt, StmtKind,
};
use rustc_ast_pretty::pprust;
use rustc_errors::{Applicability, Diag, PResult};
use rustc_errors::{Applicability, Diag, DiagArgValue, PResult, StashKey};
use rustc_session::errors::ExprParenthesesNeeded;
use rustc_span::source_map::{respan, Spanned};
use rustc_span::symbol::{kw, sym, Ident};
@ -21,8 +23,8 @@
InclusiveRangeExtraEquals, InclusiveRangeMatchArrow, InclusiveRangeNoEnd, InvalidMutInPattern,
ParenRangeSuggestion, PatternOnWrongSideOfAt, RemoveLet, RepeatedMutInPattern,
SwitchRefBoxOrder, TopLevelOrPatternNotAllowed, TopLevelOrPatternNotAllowedSugg,
TrailingVertNotAllowed, UnexpectedExpressionInPattern, UnexpectedLifetimeInPattern,
UnexpectedParenInRangePat, UnexpectedParenInRangePatSugg,
TrailingVertNotAllowed, UnexpectedExpressionInPattern, UnexpectedExpressionInPatternSugg,
UnexpectedLifetimeInPattern, UnexpectedParenInRangePat, UnexpectedParenInRangePatSugg,
UnexpectedVertVertBeforeFunctionParam, UnexpectedVertVertInPattern, WrapInParens,
};
use crate::parser::expr::{could_be_unclosed_char_literal, DestructuredFloat};
@ -448,12 +450,219 @@ fn maybe_recover_trailing_expr(
|| self.token == token::CloseDelim(Delimiter::Parenthesis)
&& self.look_ahead(1, Token::is_range_separator);
let span = expr.span;
Some((
self.dcx().emit_err(UnexpectedExpressionInPattern { span: expr.span, is_bound }),
expr.span,
self.dcx()
.create_err(UnexpectedExpressionInPattern {
span,
is_bound,
expr_precedence: expr.precedence().order(),
})
.stash(span, StashKey::ExprInPat)
.unwrap(),
span,
))
}
/// Called by [`Parser::parse_stmt_without_recovery`], used to add statement-aware subdiagnostics to the errors stashed
/// by [`Parser::maybe_recover_trailing_expr`].
pub(super) fn maybe_augment_stashed_expr_in_pats_with_suggestions(&mut self, stmt: &Stmt) {
if self.dcx().has_errors().is_none() {
// No need to walk the statement if there's no stashed errors.
return;
}
struct PatVisitor<'a> {
/// `self`
parser: &'a Parser<'a>,
/// The freshly-parsed statement.
stmt: &'a Stmt,
/// The current match arm (for arm guard suggestions).
arm: Option<&'a Arm>,
/// The current struct field (for variable name suggestions).
field: Option<&'a PatField>,
}
impl<'a> PatVisitor<'a> {
/// Looks for stashed [`StashKey::ExprInPat`] errors in `stash_span`, and emit them with suggestions.
/// `stash_span` is contained in `expr_span`, the latter being larger in borrow patterns;
/// ```txt
/// &mut x.y
/// -----^^^ `stash_span`
/// |
/// `expr_span`
/// ```
/// `is_range_bound` is used to exclude arm guard suggestions in range pattern bounds.
fn maybe_add_suggestions_then_emit(
&self,
stash_span: Span,
expr_span: Span,
is_range_bound: bool,
) {
self.parser.dcx().try_steal_modify_and_emit_err(
stash_span,
StashKey::ExprInPat,
|err| {
// Includes pre-pats (e.g. `&mut <err>`) in the diagnostic.
err.span.replace(stash_span, expr_span);
let sm = self.parser.psess.source_map();
let stmt = self.stmt;
let line_lo = sm.span_extend_to_line(stmt.span).shrink_to_lo();
let indentation = sm.indentation_before(stmt.span).unwrap_or_default();
let Ok(expr) = self.parser.span_to_snippet(expr_span) else {
// FIXME: some suggestions don't actually need the snippet; see PR #123877's unresolved conversations.
return;
};
if let StmtKind::Let(local) = &stmt.kind {
match &local.kind {
LocalKind::Decl | LocalKind::Init(_) => {
// It's kinda hard to guess what the user intended, so don't make suggestions.
return;
}
LocalKind::InitElse(_, _) => {}
}
}
// help: use an arm guard `if val == expr`
// FIXME(guard_patterns): suggest this regardless of a match arm.
if let Some(arm) = &self.arm
&& !is_range_bound
{
let (ident, ident_span) = match self.field {
Some(field) => {
(field.ident.to_string(), field.ident.span.to(expr_span))
}
None => ("val".to_owned(), expr_span),
};
// Are parentheses required around `expr`?
// HACK: a neater way would be preferable.
let expr = match &err.args["expr_precedence"] {
DiagArgValue::Number(expr_precedence) => {
if *expr_precedence
<= ExprPrecedence::Binary(BinOpKind::Eq).order() as i32
{
format!("({expr})")
} else {
format!("{expr}")
}
}
_ => unreachable!(),
};
match &arm.guard {
None => {
err.subdiagnostic(
UnexpectedExpressionInPatternSugg::CreateGuard {
ident_span,
pat_hi: arm.pat.span.shrink_to_hi(),
ident,
expr,
},
);
}
Some(guard) => {
// Are parentheses required around the old guard?
let wrap_guard = guard.precedence().order()
<= ExprPrecedence::Binary(BinOpKind::And).order();
err.subdiagnostic(
UnexpectedExpressionInPatternSugg::UpdateGuard {
ident_span,
guard_lo: if wrap_guard {
Some(guard.span.shrink_to_lo())
} else {
None
},
guard_hi: guard.span.shrink_to_hi(),
guard_hi_paren: if wrap_guard { ")" } else { "" },
ident,
expr,
},
);
}
}
}
// help: extract the expr into a `const VAL: _ = expr`
let ident = match self.field {
Some(field) => field.ident.as_str().to_uppercase(),
None => "VAL".to_owned(),
};
err.subdiagnostic(UnexpectedExpressionInPatternSugg::Const {
stmt_lo: line_lo,
ident_span: expr_span,
expr,
ident,
indentation,
});
// help: wrap the expr in a `const { expr }`
// FIXME(inline_const_pat): once stabilized, remove this check and remove the `(requires #[feature(inline_const_pat)])` note from the message
if self.parser.psess.unstable_features.is_nightly_build() {
err.subdiagnostic(UnexpectedExpressionInPatternSugg::InlineConst {
start_span: expr_span.shrink_to_lo(),
end_span: expr_span.shrink_to_hi(),
});
}
},
);
}
}
impl<'a> Visitor<'a> for PatVisitor<'a> {
fn visit_arm(&mut self, a: &'a Arm) -> Self::Result {
self.arm = Some(a);
visit::walk_arm(self, a);
self.arm = None;
}
fn visit_pat_field(&mut self, fp: &'a PatField) -> Self::Result {
self.field = Some(fp);
visit::walk_pat_field(self, fp);
self.field = None;
}
fn visit_pat(&mut self, p: &'a Pat) -> Self::Result {
match &p.kind {
// Base expression
PatKind::Err(_) | PatKind::Lit(_) => {
self.maybe_add_suggestions_then_emit(p.span, p.span, false)
}
// Sub-patterns
// FIXME: this doesn't work with recursive subpats (`&mut &mut <err>`)
PatKind::Box(subpat) | PatKind::Ref(subpat, _)
if matches!(subpat.kind, PatKind::Err(_) | PatKind::Lit(_)) =>
{
self.maybe_add_suggestions_then_emit(subpat.span, p.span, false)
}
// Sub-expressions
PatKind::Range(start, end, _) => {
if let Some(start) = start {
self.maybe_add_suggestions_then_emit(start.span, start.span, true);
}
if let Some(end) = end {
self.maybe_add_suggestions_then_emit(end.span, end.span, true);
}
}
// Walk continuation
_ => visit::walk_pat(self, p),
}
}
}
// Starts the visit.
PatVisitor { parser: self, stmt, arm: None, field: None }.visit_stmt(stmt);
}
/// Parses a pattern, with a setting whether modern range patterns (e.g., `a..=b`, `a..b` are
/// allowed).
fn parse_pat_with_range_pat(
@ -845,7 +1054,7 @@ fn visit_pat(&mut self, pat: &mut P<Pat>) {
self.0 = true;
*m = Mutability::Mut;
}
walk_pat(self, pat);
mut_visit::walk_pat(self, pat);
}
}

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@ -29,6 +29,9 @@
impl<'a> Parser<'a> {
/// Parses a statement. This stops just before trailing semicolons on everything but items.
/// e.g., a `StmtKind::Semi` parses to a `StmtKind::Expr`, leaving the trailing `;` unconsumed.
///
/// If `force_collect` is [`ForceCollect::Yes`], forces collection of tokens regardless of
/// whether or not we have attributes.
// Public for rustfmt usage.
pub(super) fn parse_stmt(&mut self, force_collect: ForceCollect) -> PResult<'a, Option<Stmt>> {
Ok(self.parse_stmt_without_recovery(false, force_collect).unwrap_or_else(|e| {
@ -66,7 +69,7 @@ pub fn parse_stmt_without_recovery(
});
}
Ok(Some(if self.token.is_keyword(kw::Let) {
let stmt = if self.token.is_keyword(kw::Let) {
self.collect_tokens(None, attrs, force_collect, |this, attrs| {
this.expect_keyword(kw::Let)?;
let local = this.parse_local(attrs)?;
@ -163,7 +166,10 @@ pub fn parse_stmt_without_recovery(
} else {
self.error_outer_attrs(attrs);
return Ok(None);
}))
};
self.maybe_augment_stashed_expr_in_pats_with_suggestions(&stmt);
Ok(Some(stmt))
}
fn parse_stmt_path_start(&mut self, lo: Span, attrs: AttrWrapper) -> PResult<'a, Stmt> {

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@ -3,6 +3,17 @@ error: expected a pattern range bound, found an expression
|
LL | 0..5+1 => errors_only.push(x),
| ^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = 5+1;
LL ~ match x as i32 {
LL ~ 0..VAL => errors_only.push(x),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | 0..const { 5+1 } => errors_only.push(x),
| +++++++ +
error[E0408]: variable `n` is not bound in all patterns
--> $DIR/range_pat_interactions1.rs:10:25

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@ -1,9 +1,3 @@
error: expected a pattern range bound, found an expression
--> $DIR/range_pat_interactions2.rs:10:18
|
LL | 0..=(5+1) => errors_only.push(x),
| ^^^ arbitrary expressions are not allowed in patterns
error: range pattern bounds cannot have parentheses
--> $DIR/range_pat_interactions2.rs:10:17
|
@ -16,6 +10,23 @@ LL - 0..=(5+1) => errors_only.push(x),
LL + 0..=5+1 => errors_only.push(x),
|
error: expected a pattern range bound, found an expression
--> $DIR/range_pat_interactions2.rs:10:18
|
LL | 0..=(5+1) => errors_only.push(x),
| ^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = 5+1;
LL ~ match x as i32 {
LL ~ 0..=(VAL) => errors_only.push(x),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | 0..=(const { 5+1 }) => errors_only.push(x),
| +++++++ +
error[E0658]: inline-const in pattern position is experimental
--> $DIR/range_pat_interactions2.rs:15:20
|

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@ -3,6 +3,21 @@ error: expected a pattern, found an expression
|
LL | tmp[0] => {}
| ^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == tmp[0] => {}
| ~~~ ++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = tmp[0];
LL ~ match z {
LL ~ VAL => {}
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { tmp[0] } => {}
| +++++++ +
error: aborting due to 1 previous error

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@ -1,8 +1,8 @@
error: expected a pattern, found an expression
--> $DIR/pat-lt-bracket-6.rs:5:15
--> $DIR/pat-lt-bracket-6.rs:5:14
|
LL | let Test(&desc[..]) = x;
| ^^^^^^^^ arbitrary expressions are not allowed in patterns
| ^^^^^^^^^ arbitrary expressions are not allowed in patterns
error[E0308]: mismatched types
--> $DIR/pat-lt-bracket-6.rs:10:30

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@ -53,13 +53,21 @@ fn type_cast() {
}
}
// ArithmeticOrLogicalExpression
// ArithmeticOrLogicalExpression, also check if parentheses are added as needed
fn operator() {
match 0 {
1 + 1 => (), //~ error: expected a pattern, found an expression
(1 + 2) * 3 => (),
//~^ error: expected a pattern, found an expression
//~| error: expected a pattern, found an expression
x.0 > 2 => (), //~ error: expected a pattern, found an expression
x.0 == 2 => (), //~ error: expected a pattern, found an expression
}
// preexisting match arm guard
match (0, 0) {
(x, y.0 > 2) if x != 0 => (), //~ error: expected a pattern, found an expression
(x, y.0 > 2) if x != 0 || x != 1 => (), //~ error: expected a pattern, found an expression
}
}

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@ -3,30 +3,117 @@ error: expected a pattern, found an expression
|
LL | x.y => (),
| ^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == x.y => (),
| ~~~ +++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x.y;
LL ~ match 0 {
LL | x => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x.y } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:6:9
|
LL | x.0 => (),
| ^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == x.0 => (),
| ~~~ +++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x.0;
LL ~ match 0 {
LL | x => (),
LL | x.y => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x.0 } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:7:9
|
LL | x._0 => (),
| ^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == x._0 => (),
| ~~~ ++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x._0;
LL ~ match 0 {
LL | x => (),
LL | x.y => (),
LL | x.0 => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x._0 } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:8:9
|
LL | x.0.1 => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == x.0.1 => (),
| ~~~ +++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x.0.1;
LL ~ match 0 {
LL | x => (),
...
LL | x._0 => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x.0.1 } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:9:9
|
LL | x.4.y.17.__z => (),
| ^^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == x.4.y.17.__z => (),
| ~~~ ++++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x.4.y.17.__z;
LL ~ match 0 {
LL | x => (),
...
LL | x.0.1 => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x.4.y.17.__z } => (),
| +++++++ +
error: expected one of `:`, `;`, `=`, `@`, or `|`, found `.`
--> $DIR/recover-pat-exprs.rs:12:12
@ -63,12 +150,43 @@ error: expected a pattern, found an expression
|
LL | x[0] => (),
| ^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == x[0] => (),
| ~~~ ++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x[0];
LL ~ match 0 {
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x[0] } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:24:9
|
LL | x[..] => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == x[..] => (),
| ~~~ +++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x[..];
LL ~ match 0 {
LL | x[0] => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x[..] } => (),
| +++++++ +
error: expected one of `:`, `;`, `=`, `@`, or `|`, found `[`
--> $DIR/recover-pat-exprs.rs:27:12
@ -102,99 +220,365 @@ error: expected a pattern, found an expression
|
LL | x.f() => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == x.f() => (),
| ~~~ +++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x.f();
LL ~ match 0 {
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x.f() } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:38:9
|
LL | x._f() => (),
| ^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == x._f() => (),
| ~~~ ++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x._f();
LL ~ match 0 {
LL | x.f() => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x._f() } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:39:9
|
LL | x? => (),
| ^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == x? => (),
| ~~~ ++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x?;
LL ~ match 0 {
LL | x.f() => (),
LL | x._f() => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x? } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:40:9
|
LL | ().f() => (),
| ^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == ().f() => (),
| ~~~ ++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = ().f();
LL ~ match 0 {
LL | x.f() => (),
LL | x._f() => (),
LL | x? => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { ().f() } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:41:9
|
LL | (0, x)?.f() => (),
| ^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == (0, x)?.f() => (),
| ~~~ +++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = (0, x)?.f();
LL ~ match 0 {
LL | x.f() => (),
...
LL | ().f() => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { (0, x)?.f() } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:42:9
|
LL | x.f().g() => (),
| ^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == x.f().g() => (),
| ~~~ +++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x.f().g();
LL ~ match 0 {
LL | x.f() => (),
...
LL | (0, x)?.f() => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x.f().g() } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:43:9
|
LL | 0.f()?.g()?? => (),
| ^^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == 0.f()?.g()?? => (),
| ~~~ ++++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = 0.f()?.g()??;
LL ~ match 0 {
LL | x.f() => (),
...
LL | x.f().g() => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { 0.f()?.g()?? } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:50:9
|
LL | x as usize => (),
| ^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == x as usize => (),
| ~~~ ++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x as usize;
LL ~ match 0 {
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x as usize } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:51:9
|
LL | 0 as usize => (),
| ^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == 0 as usize => (),
| ~~~ ++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = 0 as usize;
LL ~ match 0 {
LL | x as usize => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { 0 as usize } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:52:9
|
LL | x.f().0.4 as f32 => (),
| ^^^^^^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == x.f().0.4 as f32 => (),
| ~~~ ++++++++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x.f().0.4 as f32;
LL ~ match 0 {
LL | x as usize => (),
LL | 0 as usize => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x.f().0.4 as f32 } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:59:9
|
LL | 1 + 1 => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:60:10
|
LL | (1 + 2) * 3 => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
help: consider moving the expression to a match arm guard
|
LL | val if val == 1 + 1 => (),
| ~~~ +++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = 1 + 1;
LL ~ match 0 {
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { 1 + 1 } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:60:9
|
LL | (1 + 2) * 3 => (),
| ^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == (1 + 2) * 3 => (),
| ~~~ +++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = (1 + 2) * 3;
LL ~ match 0 {
LL | 1 + 1 => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { (1 + 2) * 3 } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:67:5
--> $DIR/recover-pat-exprs.rs:63:9
|
LL | 1 + 2 * PI.cos() => 2,
| ^^^^^^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
LL | x.0 > 2 => (),
| ^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == (x.0 > 2) => (),
| ~~~ +++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x.0 > 2;
LL ~ match 0 {
LL | 1 + 1 => (),
...
LL |
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x.0 > 2 } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:73:9
--> $DIR/recover-pat-exprs.rs:64:9
|
LL | u8::MAX.abs() => (),
| ^^^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:75:9
|
LL | x.sqrt() @ .. => (),
LL | x.0 == 2 => (),
| ^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == (x.0 == 2) => (),
| ~~~ ++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = x.0 == 2;
LL ~ match 0 {
LL | 1 + 1 => (),
...
LL | x.0 > 2 => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { x.0 == 2 } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:69:13
|
LL | (x, y.0 > 2) if x != 0 => (),
| ^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to the match arm guard
|
LL | (x, val) if x != 0 && val == (y.0 > 2) => (),
| ~~~ +++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = y.0 > 2;
LL ~ match (0, 0) {
LL ~ (x, VAL) if x != 0 => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | (x, const { y.0 > 2 }) if x != 0 => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:70:13
|
LL | (x, y.0 > 2) if x != 0 || x != 1 => (),
| ^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to the match arm guard
|
LL | (x, val) if (x != 0 || x != 1) && val == (y.0 > 2) => (),
| ~~~ + +++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = y.0 > 2;
LL ~ match (0, 0) {
LL | (x, y.0 > 2) if x != 0 => (),
LL ~ (x, VAL) if x != 0 || x != 1 => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | (x, const { y.0 > 2 }) if x != 0 || x != 1 => (),
| +++++++ +
error: left-hand side of `@` must be a binding
--> $DIR/recover-pat-exprs.rs:75:9
--> $DIR/recover-pat-exprs.rs:83:9
|
LL | x.sqrt() @ .. => (),
| --------^^^--
@ -204,50 +588,161 @@ LL | x.sqrt() @ .. => (),
|
= note: bindings are `x`, `mut x`, `ref x`, and `ref mut x`
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:78:17
|
LL | z @ w @ v.u() => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:80:9
|
LL | y.ilog(3) => (),
| ^^^^^^^^^ arbitrary expressions are not allowed in patterns
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:82:9
|
LL | n + 1 => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:84:10
|
LL | ("".f() + 14 * 8) => (),
| ^^^^^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:87:9
|
LL | f?() => (),
| ^^^^ arbitrary expressions are not allowed in patterns
error: expected one of `)`, `,`, or `|`, found `+`
--> $DIR/recover-pat-exprs.rs:89:12
--> $DIR/recover-pat-exprs.rs:97:12
|
LL | (_ + 1) => (),
| ^ expected one of `)`, `,`, or `|`
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:93:9
--> $DIR/recover-pat-exprs.rs:81:9
|
LL | u8::MAX.abs() => (),
| ^^^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == u8::MAX.abs() => (),
| ~~~ +++++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = u8::MAX.abs();
LL ~ match u8::MAX {
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { u8::MAX.abs() } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:86:17
|
LL | z @ w @ v.u() => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | z @ w @ val if val == v.u() => (),
| ~~~ +++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = v.u();
LL ~ match u8::MAX {
LL | u8::MAX.abs() => (),
...
LL |
LL ~ z @ w @ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | z @ w @ const { v.u() } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:88:9
|
LL | y.ilog(3) => (),
| ^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == y.ilog(3) => (),
| ~~~ +++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = y.ilog(3);
LL ~ match u8::MAX {
LL | u8::MAX.abs() => (),
...
LL |
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { y.ilog(3) } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:90:9
|
LL | n + 1 => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == n + 1 => (),
| ~~~ +++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = n + 1;
LL ~ match u8::MAX {
LL | u8::MAX.abs() => (),
...
LL |
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { n + 1 } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:92:10
|
LL | ("".f() + 14 * 8) => (),
| ^^^^^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | (val) if val == "".f() + 14 * 8 => (),
| ~~~ +++++++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = "".f() + 14 * 8;
LL ~ match u8::MAX {
LL | u8::MAX.abs() => (),
...
LL |
LL ~ (VAL) => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | (const { "".f() + 14 * 8 }) => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:95:9
|
LL | f?() => (),
| ^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | val if val == f?() => (),
| ~~~ ++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = f?();
LL ~ match u8::MAX {
LL | u8::MAX.abs() => (),
...
LL | 0 | ((1) | 2) | 3 => (),
LL ~ VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { f?() } => (),
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:101:9
|
LL | let 1 + 1 = 2;
| ^^^^^ arbitrary expressions are not allowed in patterns
error: expected one of `)`, `,`, `@`, or `|`, found `*`
--> $DIR/recover-pat-exprs.rs:96:28
--> $DIR/recover-pat-exprs.rs:104:28
|
LL | let b = matches!(x, (x * x | x.f()) | x[0]);
| ^ expected one of `)`, `,`, `@`, or `|`
@ -255,5 +750,23 @@ LL | let b = matches!(x, (x * x | x.f()) | x[0]);
|
= note: while parsing argument for this `pat` macro fragment
error: aborting due to 41 previous errors
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:60:10
|
LL | (1 + 2) * 3 => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:75:5
|
LL | 1 + 2 * PI.cos() => 2,
| ^^^^^^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
error: expected a pattern, found an expression
--> $DIR/recover-pat-exprs.rs:83:9
|
LL | x.sqrt() @ .. => (),
| ^^^^^^^^ arbitrary expressions are not allowed in patterns
error: aborting due to 45 previous errors

View File

@ -3,36 +3,111 @@ error: expected a pattern, found an expression
|
LL | Foo("hi".to_owned()) => true,
| ^^^^^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | Foo(val) if val == "hi".to_owned() => true,
| ~~~ +++++++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = "hi".to_owned();
LL ~ match foo {
LL ~ Foo(VAL) => true,
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | Foo(const { "hi".to_owned() }) => true,
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-issues.rs:14:20
|
LL | Bar { baz: "hi".to_owned() } => true,
| ^^^^^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | Bar { baz } if baz == "hi".to_owned() => true,
| ~~~ +++++++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const BAZ: /* Type */ = "hi".to_owned();
LL ~ match bar {
LL ~ Bar { baz: BAZ } => true,
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | Bar { baz: const { "hi".to_owned() } } => true,
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-issues.rs:25:11
|
LL | &["foo".to_string()] => {}
| ^^^^^^^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider moving the expression to a match arm guard
|
LL | &[val] if val == "foo".to_string() => {}
| ~~~ +++++++++++++++++++++++++++
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = "foo".to_string();
LL ~ match foo.as_slice() {
LL ~ &[VAL] => {}
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | &[const { "foo".to_string() }] => {}
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-issues.rs:36:17
|
LL | if let Some(MAGIC.0 as usize) = None::<usize> {}
| ^^^^^^^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = MAGIC.0 as usize;
LL ~ if let Some(VAL) = None::<usize> {}
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | if let Some(const { MAGIC.0 as usize }) = None::<usize> {}
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-issues.rs:41:13
|
LL | if let (-1.some(4)) = (0, Some(4)) {}
| ^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = -1.some(4);
LL ~ if let (VAL) = (0, Some(4)) {}
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | if let (const { -1.some(4) }) = (0, Some(4)) {}
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-issues.rs:44:13
|
LL | if let (-1.Some(4)) = (0, Some(4)) {}
| ^^^^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = -1.Some(4);
LL ~ if let (VAL) = (0, Some(4)) {}
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | if let (const { -1.Some(4) }) = (0, Some(4)) {}
| +++++++ +
error: aborting due to 6 previous errors

View File

@ -21,12 +21,32 @@ error: expected a pattern, found an expression
|
LL | let Some(1 + 1) = x else {
| ^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = 1 + 1;
LL ~ let Some(VAL) = x else {
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | let Some(const { 1 + 1 }) = x else {
| +++++++ +
error: expected a pattern, found an expression
--> $DIR/recover-pat-lets.rs:17:17
|
LL | if let Some(1 + 1) = x {
| ^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = 1 + 1;
LL ~ if let Some(VAL) = x {
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | if let Some(const { 1 + 1 }) = x {
| +++++++ +
error: aborting due to 5 previous errors

View File

@ -46,12 +46,6 @@ LL - (0)..=(-4) => (),
LL + (0)..=-4 => (),
|
error: expected a pattern range bound, found an expression
--> $DIR/recover-pat-ranges.rs:11:12
|
LL | ..=1 + 2 => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
error: range pattern bounds cannot have parentheses
--> $DIR/recover-pat-ranges.rs:13:9
|
@ -64,12 +58,6 @@ LL - (4).. => (),
LL + 4.. => (),
|
error: expected a pattern range bound, found an expression
--> $DIR/recover-pat-ranges.rs:15:10
|
LL | (-4 + 0).. => (),
| ^^^^^^ arbitrary expressions are not allowed in patterns
error: range pattern bounds cannot have parentheses
--> $DIR/recover-pat-ranges.rs:15:9
|
@ -82,12 +70,6 @@ LL - (-4 + 0).. => (),
LL + -4 + 0.. => (),
|
error: expected a pattern range bound, found an expression
--> $DIR/recover-pat-ranges.rs:18:10
|
LL | (1 + 4)...1 * 2 => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
error: range pattern bounds cannot have parentheses
--> $DIR/recover-pat-ranges.rs:18:9
|
@ -100,23 +82,125 @@ LL - (1 + 4)...1 * 2 => (),
LL + 1 + 4...1 * 2 => (),
|
error: expected a pattern range bound, found an expression
--> $DIR/recover-pat-ranges.rs:11:12
|
LL | ..=1 + 2 => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = 1 + 2;
LL ~ match -1 {
LL | 0..=1 => (),
...
LL |
LL ~ ..=VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | ..=const { 1 + 2 } => (),
| +++++++ +
error: expected a pattern range bound, found an expression
--> $DIR/recover-pat-ranges.rs:15:10
|
LL | (-4 + 0).. => (),
| ^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = -4 + 0;
LL ~ match -1 {
LL | 0..=1 => (),
...
LL |
LL ~ (VAL).. => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | (const { -4 + 0 }).. => (),
| +++++++ +
error: expected a pattern range bound, found an expression
--> $DIR/recover-pat-ranges.rs:18:10
|
LL | (1 + 4)...1 * 2 => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = 1 + 4;
LL ~ match -1 {
LL | 0..=1 => (),
...
LL |
LL ~ (VAL)...1 * 2 => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | (const { 1 + 4 })...1 * 2 => (),
| +++++++ +
error: expected a pattern range bound, found an expression
--> $DIR/recover-pat-ranges.rs:18:19
|
LL | (1 + 4)...1 * 2 => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = 1 * 2;
LL ~ match -1 {
LL | 0..=1 => (),
...
LL |
LL ~ (1 + 4)...VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | (1 + 4)...const { 1 * 2 } => (),
| +++++++ +
error: expected a pattern range bound, found an expression
--> $DIR/recover-pat-ranges.rs:24:9
|
LL | 0.x()..="y".z() => (),
| ^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = 0.x();
LL ~ match -1 {
LL | 0..=1 => (),
...
LL |
LL ~ VAL..="y".z() => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | const { 0.x() }..="y".z() => (),
| +++++++ +
error: expected a pattern range bound, found an expression
--> $DIR/recover-pat-ranges.rs:24:17
|
LL | 0.x()..="y".z() => (),
| ^^^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = "y".z();
LL ~ match -1 {
LL | 0..=1 => (),
...
LL |
LL ~ 0.x()..=VAL => (),
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | 0.x()..=const { "y".z() } => (),
| +++++++ +
warning: `...` range patterns are deprecated
--> $DIR/recover-pat-ranges.rs:18:16

View File

@ -59,12 +59,6 @@ error: expected one of `=>`, `if`, or `|`, found `(`
LL | ..(_) => ()
| ^ expected one of `=>`, `if`, or `|`
error: expected a pattern range bound, found an expression
--> $DIR/recover-pat-wildcards.rs:55:14
|
LL | 4..=(2 + _) => ()
| ^^^^^ arbitrary expressions are not allowed in patterns
error: range pattern bounds cannot have parentheses
--> $DIR/recover-pat-wildcards.rs:55:13
|
@ -77,6 +71,23 @@ LL - 4..=(2 + _) => ()
LL + 4..=2 + _ => ()
|
error: expected a pattern range bound, found an expression
--> $DIR/recover-pat-wildcards.rs:55:14
|
LL | 4..=(2 + _) => ()
| ^^^^^ arbitrary expressions are not allowed in patterns
|
help: consider extracting the expression into a `const`
|
LL + const VAL: /* Type */ = 2 + _;
LL ~ match 9 {
LL ~ 4..=(VAL) => ()
|
help: consider wrapping the expression in an inline `const` (requires `#![feature(inline_const_pat)]`)
|
LL | 4..=(const { 2 + _ }) => ()
| +++++++ +
error: aborting due to 11 previous errors
For more information about this error, try `rustc --explain E0586`.