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Reduce double errors for invalid let expressions
Previously some invalid let expressions would result in both a feature error and a parsing error. Avoid this and ensure that we only emit the parsing error when this happens.
This commit is contained in:
Matthew Jasper
parent
2d7a5f528c
commit
b011a0a13b
@ -2485,9 +2485,6 @@ impl<'a> Parser<'a> {
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}
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let expr = self.parse_expr_assoc_with(1 + prec_let_scrutinee_needs_par(), None.into())?;
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let span = lo.to(expr.span);
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if is_recovered.is_none() {
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self.sess.gated_spans.gate(sym::let_chains, span);
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}
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Ok(self.mk_expr(span, ExprKind::Let(pat, expr, span, is_recovered)))
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}
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@ -3460,6 +3457,8 @@ impl MutVisitor for CondChecker<'_> {
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.sess
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.emit_err(errors::ExpectedExpressionFoundLet { span, reason }),
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);
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} else {
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self.parser.sess.gated_spans.gate(sym::let_chains, span);
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}
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}
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ExprKind::Binary(Spanned { node: BinOpKind::And, .. }, _, _) => {
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@ -4,7 +4,6 @@
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fn a() {
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if let x = 1 && i = 2 {}
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//~^ ERROR cannot find value `i` in this scope
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//~| ERROR `let` expressions in this position are unstable
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//~| ERROR mismatched types
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//~| ERROR expected expression, found `let` statement
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}
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@ -11,7 +11,7 @@ LL | if let x = 1 && i = 2 {}
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| ^ not found in this scope
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error[E0425]: cannot find value `i` in this scope
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--> $DIR/bad-if-let-suggestion.rs:13:9
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--> $DIR/bad-if-let-suggestion.rs:12:9
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LL | fn a() {
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| ------ similarly named function `a` defined here
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@ -20,7 +20,7 @@ LL | if (i + j) = i {}
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| ^ help: a function with a similar name exists: `a`
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error[E0425]: cannot find value `j` in this scope
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--> $DIR/bad-if-let-suggestion.rs:13:13
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--> $DIR/bad-if-let-suggestion.rs:12:13
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LL | fn a() {
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| ------ similarly named function `a` defined here
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@ -29,7 +29,7 @@ LL | if (i + j) = i {}
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| ^ help: a function with a similar name exists: `a`
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error[E0425]: cannot find value `i` in this scope
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--> $DIR/bad-if-let-suggestion.rs:13:18
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--> $DIR/bad-if-let-suggestion.rs:12:18
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LL | fn a() {
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| ------ similarly named function `a` defined here
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@ -38,7 +38,7 @@ LL | if (i + j) = i {}
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| ^ help: a function with a similar name exists: `a`
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error[E0425]: cannot find value `x` in this scope
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--> $DIR/bad-if-let-suggestion.rs:20:8
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--> $DIR/bad-if-let-suggestion.rs:19:8
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LL | fn a() {
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| ------ similarly named function `a` defined here
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@ -46,15 +46,6 @@ LL | fn a() {
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LL | if x[0] = 1 {}
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| ^ help: a function with a similar name exists: `a`
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error[E0658]: `let` expressions in this position are unstable
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--> $DIR/bad-if-let-suggestion.rs:5:8
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LL | if let x = 1 && i = 2 {}
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| ^^^^^^^^^
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= note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
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= help: add `#![feature(let_chains)]` to the crate attributes to enable
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error[E0308]: mismatched types
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--> $DIR/bad-if-let-suggestion.rs:5:8
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@ -66,7 +57,7 @@ help: you might have meant to compare for equality
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LL | if let x = 1 && i == 2 {}
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| +
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error: aborting due to 8 previous errors
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error: aborting due to 7 previous errors
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Some errors have detailed explanations: E0308, E0425, E0658.
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Some errors have detailed explanations: E0308, E0425.
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For more information about an error, try `rustc --explain E0308`.
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@ -9,11 +9,9 @@ fn _if_let_guard() {
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() if (let 0 = 1) => {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR `let` expressions in this position are unstable
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() if (((let 0 = 1))) => {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR `let` expressions in this position are unstable
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() if true && let 0 = 1 => {}
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//~^ ERROR `if let` guards are experimental
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@ -25,25 +23,18 @@ fn _if_let_guard() {
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() if (let 0 = 1) && true => {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR `let` expressions in this position are unstable
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() if true && (let 0 = 1) => {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR `let` expressions in this position are unstable
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() if (let 0 = 1) && (let 0 = 1) => {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR expected expression, found `let` statement
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//~| ERROR `let` expressions in this position are unstable
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//~| ERROR `let` expressions in this position are unstable
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() if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
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//~^ ERROR `if let` guards are experimental
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//~| ERROR `let` expressions in this position are unstable
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//~| ERROR `let` expressions in this position are unstable
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//~| ERROR `let` expressions in this position are unstable
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//~| ERROR `let` expressions in this position are unstable
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//~| ERROR `let` expressions in this position are unstable
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//~| ERROR expected expression, found `let` statement
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//~| ERROR expected expression, found `let` statement
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//~| ERROR expected expression, found `let` statement
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@ -11,115 +11,115 @@ LL | () if (let 0 = 1) => {}
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| ^^^^^^^^^
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error: expected expression, found `let` statement
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--> $DIR/feature-gate.rs:14:18
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--> $DIR/feature-gate.rs:13:18
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LL | () if (((let 0 = 1))) => {}
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| ^^^^^^^^^
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note: `let`s wrapped in parentheses are not supported in a context with let chains
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--> $DIR/feature-gate.rs:14:18
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--> $DIR/feature-gate.rs:13:18
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LL | () if (((let 0 = 1))) => {}
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| ^^^^^^^^^
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error: expected expression, found `let` statement
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--> $DIR/feature-gate.rs:26:16
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--> $DIR/feature-gate.rs:24:16
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LL | () if (let 0 = 1) && true => {}
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| ^^^^^^^^^
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note: `let`s wrapped in parentheses are not supported in a context with let chains
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--> $DIR/feature-gate.rs:26:16
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--> $DIR/feature-gate.rs:24:16
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LL | () if (let 0 = 1) && true => {}
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| ^^^^^^^^^
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error: expected expression, found `let` statement
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--> $DIR/feature-gate.rs:30:24
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--> $DIR/feature-gate.rs:27:24
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LL | () if true && (let 0 = 1) => {}
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| ^^^^^^^^^
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note: `let`s wrapped in parentheses are not supported in a context with let chains
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--> $DIR/feature-gate.rs:30:24
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--> $DIR/feature-gate.rs:27:24
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LL | () if true && (let 0 = 1) => {}
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| ^^^^^^^^^
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error: expected expression, found `let` statement
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--> $DIR/feature-gate.rs:34:16
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--> $DIR/feature-gate.rs:30:16
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LL | () if (let 0 = 1) && (let 0 = 1) => {}
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| ^^^^^^^^^
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note: `let`s wrapped in parentheses are not supported in a context with let chains
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--> $DIR/feature-gate.rs:34:16
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--> $DIR/feature-gate.rs:30:16
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LL | () if (let 0 = 1) && (let 0 = 1) => {}
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| ^^^^^^^^^
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error: expected expression, found `let` statement
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--> $DIR/feature-gate.rs:34:31
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--> $DIR/feature-gate.rs:30:31
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LL | () if (let 0 = 1) && (let 0 = 1) => {}
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| ^^^^^^^^^
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note: `let`s wrapped in parentheses are not supported in a context with let chains
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--> $DIR/feature-gate.rs:34:31
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--> $DIR/feature-gate.rs:30:31
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LL | () if (let 0 = 1) && (let 0 = 1) => {}
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| ^^^^^^^^^
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error: expected expression, found `let` statement
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--> $DIR/feature-gate.rs:40:42
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--> $DIR/feature-gate.rs:34:42
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LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
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| ^^^^^^^^^
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note: `let`s wrapped in parentheses are not supported in a context with let chains
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--> $DIR/feature-gate.rs:40:42
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--> $DIR/feature-gate.rs:34:42
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LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: expected expression, found `let` statement
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--> $DIR/feature-gate.rs:40:55
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--> $DIR/feature-gate.rs:34:55
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LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
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| ^^^^^^^^^
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note: `let`s wrapped in parentheses are not supported in a context with let chains
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--> $DIR/feature-gate.rs:40:42
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--> $DIR/feature-gate.rs:34:42
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LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: expected expression, found `let` statement
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--> $DIR/feature-gate.rs:40:68
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--> $DIR/feature-gate.rs:34:68
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LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
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| ^^^^^^^^^
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note: `let`s wrapped in parentheses are not supported in a context with let chains
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--> $DIR/feature-gate.rs:40:42
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--> $DIR/feature-gate.rs:34:42
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LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: expected expression, found `let` statement
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--> $DIR/feature-gate.rs:69:16
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--> $DIR/feature-gate.rs:60:16
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LL | use_expr!((let 0 = 1 && 0 == 0));
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| ^^^
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error: expected expression, found `let` statement
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--> $DIR/feature-gate.rs:71:16
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--> $DIR/feature-gate.rs:62:16
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LL | use_expr!((let 0 = 1));
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| ^^^
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error: no rules expected the token `let`
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--> $DIR/feature-gate.rs:79:15
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--> $DIR/feature-gate.rs:70:15
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LL | macro_rules! use_expr {
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| --------------------- when calling this macro
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@ -128,7 +128,7 @@ LL | use_expr!(let 0 = 1);
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| ^^^ no rules expected this token in macro call
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note: while trying to match meta-variable `$e:expr`
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--> $DIR/feature-gate.rs:62:10
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--> $DIR/feature-gate.rs:53:10
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LL | ($e:expr) => {
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| ^^^^^^^
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@ -144,7 +144,7 @@ LL | () if let 0 = 1 => {}
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= help: you can write `if matches!(<expr>, <pattern>)` instead of `if let <pattern> = <expr>`
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error[E0658]: `if let` guards are experimental
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--> $DIR/feature-gate.rs:18:12
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--> $DIR/feature-gate.rs:16:12
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LL | () if true && let 0 = 1 => {}
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| ^^^^^^^^^^^^^^^^^^^^
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@ -154,7 +154,7 @@ LL | () if true && let 0 = 1 => {}
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= help: you can write `if matches!(<expr>, <pattern>)` instead of `if let <pattern> = <expr>`
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error[E0658]: `if let` guards are experimental
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--> $DIR/feature-gate.rs:22:12
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--> $DIR/feature-gate.rs:20:12
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LL | () if let 0 = 1 && true => {}
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| ^^^^^^^^^^^^^^^^^^^^
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@ -164,7 +164,7 @@ LL | () if let 0 = 1 && true => {}
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= help: you can write `if matches!(<expr>, <pattern>)` instead of `if let <pattern> = <expr>`
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error[E0658]: `if let` guards are experimental
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--> $DIR/feature-gate.rs:40:12
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--> $DIR/feature-gate.rs:34:12
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LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -174,7 +174,7 @@ LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 =
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= help: you can write `if matches!(<expr>, <pattern>)` instead of `if let <pattern> = <expr>`
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error[E0658]: `if let` guards are experimental
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--> $DIR/feature-gate.rs:52:12
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--> $DIR/feature-gate.rs:43:12
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LL | () if let Range { start: _, end: _ } = (true..true) && false => {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -184,7 +184,7 @@ LL | () if let Range { start: _, end: _ } = (true..true) && false => {}
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= help: you can write `if matches!(<expr>, <pattern>)` instead of `if let <pattern> = <expr>`
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error[E0658]: `if let` guards are experimental
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--> $DIR/feature-gate.rs:75:12
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--> $DIR/feature-gate.rs:66:12
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LL | () if let 0 = 1 => {}
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| ^^^^^^^^^^^^
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@ -194,25 +194,7 @@ LL | () if let 0 = 1 => {}
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= help: you can write `if matches!(<expr>, <pattern>)` instead of `if let <pattern> = <expr>`
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error[E0658]: `let` expressions in this position are unstable
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--> $DIR/feature-gate.rs:10:16
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LL | () if (let 0 = 1) => {}
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| ^^^^^^^^^
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= note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
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= help: add `#![feature(let_chains)]` to the crate attributes to enable
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error[E0658]: `let` expressions in this position are unstable
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--> $DIR/feature-gate.rs:14:18
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LL | () if (((let 0 = 1))) => {}
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| ^^^^^^^^^
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= note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
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= help: add `#![feature(let_chains)]` to the crate attributes to enable
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error[E0658]: `let` expressions in this position are unstable
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--> $DIR/feature-gate.rs:18:23
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--> $DIR/feature-gate.rs:16:23
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LL | () if true && let 0 = 1 => {}
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| ^^^^^^^^^
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@ -221,7 +203,7 @@ LL | () if true && let 0 = 1 => {}
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= help: add `#![feature(let_chains)]` to the crate attributes to enable
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error[E0658]: `let` expressions in this position are unstable
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--> $DIR/feature-gate.rs:22:15
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--> $DIR/feature-gate.rs:20:15
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|
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LL | () if let 0 = 1 && true => {}
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| ^^^^^^^^^
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@ -230,43 +212,7 @@ LL | () if let 0 = 1 && true => {}
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= help: add `#![feature(let_chains)]` to the crate attributes to enable
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error[E0658]: `let` expressions in this position are unstable
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--> $DIR/feature-gate.rs:26:16
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LL | () if (let 0 = 1) && true => {}
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| ^^^^^^^^^
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|
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= note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
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= help: add `#![feature(let_chains)]` to the crate attributes to enable
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error[E0658]: `let` expressions in this position are unstable
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--> $DIR/feature-gate.rs:30:24
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|
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LL | () if true && (let 0 = 1) => {}
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| ^^^^^^^^^
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|
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= note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
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= help: add `#![feature(let_chains)]` to the crate attributes to enable
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error[E0658]: `let` expressions in this position are unstable
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--> $DIR/feature-gate.rs:34:16
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|
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LL | () if (let 0 = 1) && (let 0 = 1) => {}
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| ^^^^^^^^^
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|
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= note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
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= help: add `#![feature(let_chains)]` to the crate attributes to enable
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error[E0658]: `let` expressions in this position are unstable
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--> $DIR/feature-gate.rs:34:31
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|
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LL | () if (let 0 = 1) && (let 0 = 1) => {}
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| ^^^^^^^^^
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|
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= note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
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= help: add `#![feature(let_chains)]` to the crate attributes to enable
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error[E0658]: `let` expressions in this position are unstable
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--> $DIR/feature-gate.rs:40:15
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--> $DIR/feature-gate.rs:34:15
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|
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LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
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| ^^^^^^^^^
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@ -275,7 +221,7 @@ LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 =
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= help: add `#![feature(let_chains)]` to the crate attributes to enable
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error[E0658]: `let` expressions in this position are unstable
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--> $DIR/feature-gate.rs:40:28
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--> $DIR/feature-gate.rs:34:28
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|
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LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
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| ^^^^^^^^^
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||||
@ -284,34 +230,7 @@ LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 =
|
||||
= help: add `#![feature(let_chains)]` to the crate attributes to enable
|
||||
|
||||
error[E0658]: `let` expressions in this position are unstable
|
||||
--> $DIR/feature-gate.rs:40:42
|
||||
|
|
||||
LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
= note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
|
||||
= help: add `#![feature(let_chains)]` to the crate attributes to enable
|
||||
|
||||
error[E0658]: `let` expressions in this position are unstable
|
||||
--> $DIR/feature-gate.rs:40:55
|
||||
|
|
||||
LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
= note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
|
||||
= help: add `#![feature(let_chains)]` to the crate attributes to enable
|
||||
|
||||
error[E0658]: `let` expressions in this position are unstable
|
||||
--> $DIR/feature-gate.rs:40:68
|
||||
|
|
||||
LL | () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
= note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
|
||||
= help: add `#![feature(let_chains)]` to the crate attributes to enable
|
||||
|
||||
error[E0658]: `let` expressions in this position are unstable
|
||||
--> $DIR/feature-gate.rs:52:15
|
||||
--> $DIR/feature-gate.rs:43:15
|
||||
|
|
||||
LL | () if let Range { start: _, end: _ } = (true..true) && false => {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
@ -319,6 +238,6 @@ LL | () if let Range { start: _, end: _ } = (true..true) && false => {}
|
||||
= note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
|
||||
= help: add `#![feature(let_chains)]` to the crate attributes to enable
|
||||
|
||||
error: aborting due to 32 previous errors
|
||||
error: aborting due to 23 previous errors
|
||||
|
||||
For more information about this error, try `rustc --explain E0658`.
|
||||
|
||||
@ -0,0 +1,340 @@
|
||||
// Check that we don't suggest enabling a feature for code that's
|
||||
// not accepted even with that feature.
|
||||
|
||||
#![allow(irrefutable_let_patterns)]
|
||||
|
||||
use std::ops::Range;
|
||||
|
||||
fn main() {}
|
||||
|
||||
fn _if() {
|
||||
if (let 0 = 1) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
if (((let 0 = 1))) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
if (let 0 = 1) && true {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
if true && (let 0 = 1) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
if (let 0 = 1) && (let 0 = 1) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR expected expression, found `let` statement
|
||||
|
||||
if (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR expected expression, found `let` statement
|
||||
//~| ERROR expected expression, found `let` statement
|
||||
}
|
||||
|
||||
fn _while() {
|
||||
while (let 0 = 1) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
while (((let 0 = 1))) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
while (let 0 = 1) && true {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
while true && (let 0 = 1) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
while (let 0 = 1) && (let 0 = 1) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR expected expression, found `let` statement
|
||||
|
||||
while (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR expected expression, found `let` statement
|
||||
//~| ERROR expected expression, found `let` statement
|
||||
}
|
||||
|
||||
fn _macros() {
|
||||
macro_rules! use_expr {
|
||||
($e:expr) => {
|
||||
if $e {}
|
||||
while $e {}
|
||||
}
|
||||
}
|
||||
use_expr!((let 0 = 1 && 0 == 0));
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
use_expr!((let 0 = 1));
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
}
|
||||
|
||||
fn nested_within_if_expr() {
|
||||
if &let 0 = 0 {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
if !let 0 = 0 {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
if *let 0 = 0 {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
if -let 0 = 0 {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
fn _check_try_binds_tighter() -> Result<(), ()> {
|
||||
if let 0 = 0? {}
|
||||
//~^ ERROR the `?` operator can only be applied to values that implement `Try`
|
||||
Ok(())
|
||||
}
|
||||
if (let 0 = 0)? {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
if true || let 0 = 0 {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
if (true || let 0 = 0) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
if true && (true || let 0 = 0) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
if true || (true && let 0 = 0) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
let mut x = true;
|
||||
if x = let 0 = 0 {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
if true..(let 0 = 0) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR mismatched types
|
||||
if ..(let 0 = 0) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
if (let 0 = 0).. {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
// Binds as `(let ... = true)..true &&/|| false`.
|
||||
if let Range { start: _, end: _ } = true..true && false {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR mismatched types
|
||||
if let Range { start: _, end: _ } = true..true || false {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR mismatched types
|
||||
|
||||
// Binds as `(let Range { start: F, end } = F)..(|| true)`.
|
||||
const F: fn() -> bool = || true;
|
||||
if let Range { start: F, end } = F..|| true {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR mismatched types
|
||||
|
||||
// Binds as `(let Range { start: true, end } = t)..(&&false)`.
|
||||
let t = &&true;
|
||||
if let Range { start: true, end } = t..&&false {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR mismatched types
|
||||
|
||||
if let true = let true = true {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
}
|
||||
|
||||
fn nested_within_while_expr() {
|
||||
while &let 0 = 0 {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
while !let 0 = 0 {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
while *let 0 = 0 {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
while -let 0 = 0 {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
fn _check_try_binds_tighter() -> Result<(), ()> {
|
||||
while let 0 = 0? {}
|
||||
//~^ ERROR the `?` operator can only be applied to values that implement `Try`
|
||||
Ok(())
|
||||
}
|
||||
while (let 0 = 0)? {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
while true || let 0 = 0 {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
while (true || let 0 = 0) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
while true && (true || let 0 = 0) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
while true || (true && let 0 = 0) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
let mut x = true;
|
||||
while x = let 0 = 0 {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
while true..(let 0 = 0) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR mismatched types
|
||||
while ..(let 0 = 0) {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
while (let 0 = 0).. {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
// Binds as `(let ... = true)..true &&/|| false`.
|
||||
while let Range { start: _, end: _ } = true..true && false {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR mismatched types
|
||||
while let Range { start: _, end: _ } = true..true || false {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR mismatched types
|
||||
|
||||
// Binds as `(let Range { start: F, end } = F)..(|| true)`.
|
||||
const F: fn() -> bool = || true;
|
||||
while let Range { start: F, end } = F..|| true {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR mismatched types
|
||||
|
||||
// Binds as `(let Range { start: true, end } = t)..(&&false)`.
|
||||
let t = &&true;
|
||||
while let Range { start: true, end } = t..&&false {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR mismatched types
|
||||
|
||||
while let true = let true = true {}
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
}
|
||||
|
||||
fn not_error_because_clarified_intent() {
|
||||
if let Range { start: _, end: _ } = (true..true || false) { }
|
||||
|
||||
if let Range { start: _, end: _ } = (true..true && false) { }
|
||||
|
||||
while let Range { start: _, end: _ } = (true..true || false) { }
|
||||
|
||||
while let Range { start: _, end: _ } = (true..true && false) { }
|
||||
}
|
||||
|
||||
fn outside_if_and_while_expr() {
|
||||
&let 0 = 0;
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
!let 0 = 0;
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
*let 0 = 0;
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
-let 0 = 0;
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
let _ = let _ = 3;
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
fn _check_try_binds_tighter() -> Result<(), ()> {
|
||||
let 0 = 0?;
|
||||
//~^ ERROR the `?` operator can only be applied to values that implement `Try`
|
||||
Ok(())
|
||||
}
|
||||
(let 0 = 0)?;
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
true || let 0 = 0;
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
(true || let 0 = 0);
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
true && (true || let 0 = 0);
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
let mut x = true;
|
||||
x = let 0 = 0;
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
true..(let 0 = 0);
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
..(let 0 = 0);
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
(let 0 = 0)..;
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
(let Range { start: _, end: _ } = true..true || false);
|
||||
//~^ ERROR mismatched types
|
||||
//~| ERROR expected expression, found `let` statement
|
||||
|
||||
(let true = let true = true);
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR expected expression, found `let` statement
|
||||
|
||||
{
|
||||
#[cfg(FALSE)]
|
||||
let x = true && let y = 1;
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
}
|
||||
|
||||
#[cfg(FALSE)]
|
||||
{
|
||||
[1, 2, 3][let _ = ()]
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
}
|
||||
|
||||
// Check function tail position.
|
||||
&let 0 = 0
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
}
|
||||
|
||||
// Let's make sure that `let` inside const generic arguments are considered.
|
||||
fn inside_const_generic_arguments() {
|
||||
struct A<const B: bool>;
|
||||
impl<const B: bool> A<{B}> { const O: u32 = 5; }
|
||||
|
||||
if let A::<{
|
||||
true && let 1 = 1
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
}>::O = 5 {}
|
||||
|
||||
while let A::<{
|
||||
true && let 1 = 1
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
}>::O = 5 {}
|
||||
|
||||
if A::<{
|
||||
true && let 1 = 1
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
}>::O == 5 {}
|
||||
|
||||
// In the cases above we have `ExprKind::Block` to help us out.
|
||||
// Below however, we would not have a block and so an implementation might go
|
||||
// from visiting expressions to types without banning `let` expressions down the tree.
|
||||
// This tests ensures that we are not caught by surprise should the parser
|
||||
// admit non-IDENT expressions in const generic arguments.
|
||||
|
||||
if A::<
|
||||
true && let 1 = 1
|
||||
//~^ ERROR expressions must be enclosed in braces
|
||||
//~| ERROR expected expression, found `let` statement
|
||||
>::O == 5 {}
|
||||
}
|
||||
|
||||
fn with_parenthesis() {
|
||||
let opt = Some(Some(1i32));
|
||||
|
||||
if (let Some(a) = opt && true) {
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
}
|
||||
|
||||
if (let Some(a) = opt) && true {
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
}
|
||||
if (let Some(a) = opt) && (let Some(b) = a) {
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR expected expression, found `let` statement
|
||||
}
|
||||
|
||||
if (let Some(a) = opt && (let Some(b) = a)) && b == 1 {
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR expected expression, found `let` statement
|
||||
}
|
||||
if (let Some(a) = opt && (let Some(b) = a)) && true {
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
//~| ERROR expected expression, found `let` statement
|
||||
}
|
||||
if (let Some(a) = opt && (true)) && true {
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
}
|
||||
|
||||
#[cfg(FALSE)]
|
||||
let x = (true && let y = 1);
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
|
||||
#[cfg(FALSE)]
|
||||
{
|
||||
([1, 2, 3][let _ = ()])
|
||||
//~^ ERROR expected expression, found `let` statement
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,870 @@
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:11:9
|
||||
|
|
||||
LL | if (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:11:9
|
||||
|
|
||||
LL | if (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:14:11
|
||||
|
|
||||
LL | if (((let 0 = 1))) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:14:11
|
||||
|
|
||||
LL | if (((let 0 = 1))) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:17:9
|
||||
|
|
||||
LL | if (let 0 = 1) && true {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:17:9
|
||||
|
|
||||
LL | if (let 0 = 1) && true {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:20:17
|
||||
|
|
||||
LL | if true && (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:20:17
|
||||
|
|
||||
LL | if true && (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:23:9
|
||||
|
|
||||
LL | if (let 0 = 1) && (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:23:9
|
||||
|
|
||||
LL | if (let 0 = 1) && (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:23:24
|
||||
|
|
||||
LL | if (let 0 = 1) && (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:23:24
|
||||
|
|
||||
LL | if (let 0 = 1) && (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:27:9
|
||||
|
|
||||
LL | if (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:27:9
|
||||
|
|
||||
LL | if (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:27:22
|
||||
|
|
||||
LL | if (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:27:9
|
||||
|
|
||||
LL | if (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:27:35
|
||||
|
|
||||
LL | if (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:27:9
|
||||
|
|
||||
LL | if (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:34:12
|
||||
|
|
||||
LL | while (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:34:12
|
||||
|
|
||||
LL | while (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:37:14
|
||||
|
|
||||
LL | while (((let 0 = 1))) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:37:14
|
||||
|
|
||||
LL | while (((let 0 = 1))) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:40:12
|
||||
|
|
||||
LL | while (let 0 = 1) && true {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:40:12
|
||||
|
|
||||
LL | while (let 0 = 1) && true {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:43:20
|
||||
|
|
||||
LL | while true && (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:43:20
|
||||
|
|
||||
LL | while true && (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:46:12
|
||||
|
|
||||
LL | while (let 0 = 1) && (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:46:12
|
||||
|
|
||||
LL | while (let 0 = 1) && (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:46:27
|
||||
|
|
||||
LL | while (let 0 = 1) && (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:46:27
|
||||
|
|
||||
LL | while (let 0 = 1) && (let 0 = 1) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:50:12
|
||||
|
|
||||
LL | while (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:50:12
|
||||
|
|
||||
LL | while (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:50:25
|
||||
|
|
||||
LL | while (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:50:12
|
||||
|
|
||||
LL | while (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:50:38
|
||||
|
|
||||
LL | while (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:50:12
|
||||
|
|
||||
LL | while (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:70:9
|
||||
|
|
||||
LL | if &let 0 = 0 {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:73:9
|
||||
|
|
||||
LL | if !let 0 = 0 {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:75:9
|
||||
|
|
||||
LL | if *let 0 = 0 {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:77:9
|
||||
|
|
||||
LL | if -let 0 = 0 {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:85:9
|
||||
|
|
||||
LL | if (let 0 = 0)? {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:88:16
|
||||
|
|
||||
LL | if true || let 0 = 0 {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `||` operators are not supported in let chain expressions
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:88:13
|
||||
|
|
||||
LL | if true || let 0 = 0 {}
|
||||
| ^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:90:17
|
||||
|
|
||||
LL | if (true || let 0 = 0) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:92:25
|
||||
|
|
||||
LL | if true && (true || let 0 = 0) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:94:25
|
||||
|
|
||||
LL | if true || (true && let 0 = 0) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:98:12
|
||||
|
|
||||
LL | if x = let 0 = 0 {}
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:101:15
|
||||
|
|
||||
LL | if true..(let 0 = 0) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:104:11
|
||||
|
|
||||
LL | if ..(let 0 = 0) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:106:9
|
||||
|
|
||||
LL | if (let 0 = 0).. {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:110:8
|
||||
|
|
||||
LL | if let Range { start: _, end: _ } = true..true && false {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:113:8
|
||||
|
|
||||
LL | if let Range { start: _, end: _ } = true..true || false {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:119:8
|
||||
|
|
||||
LL | if let Range { start: F, end } = F..|| true {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:125:8
|
||||
|
|
||||
LL | if let Range { start: true, end } = t..&&false {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:129:19
|
||||
|
|
||||
LL | if let true = let true = true {}
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:134:12
|
||||
|
|
||||
LL | while &let 0 = 0 {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:137:12
|
||||
|
|
||||
LL | while !let 0 = 0 {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:139:12
|
||||
|
|
||||
LL | while *let 0 = 0 {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:141:12
|
||||
|
|
||||
LL | while -let 0 = 0 {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:149:12
|
||||
|
|
||||
LL | while (let 0 = 0)? {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:152:19
|
||||
|
|
||||
LL | while true || let 0 = 0 {}
|
||||
| ^^^^^^^^^
|
||||
|
|
||||
note: `||` operators are not supported in let chain expressions
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:152:16
|
||||
|
|
||||
LL | while true || let 0 = 0 {}
|
||||
| ^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:154:20
|
||||
|
|
||||
LL | while (true || let 0 = 0) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:156:28
|
||||
|
|
||||
LL | while true && (true || let 0 = 0) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:158:28
|
||||
|
|
||||
LL | while true || (true && let 0 = 0) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:162:15
|
||||
|
|
||||
LL | while x = let 0 = 0 {}
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:165:18
|
||||
|
|
||||
LL | while true..(let 0 = 0) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:168:14
|
||||
|
|
||||
LL | while ..(let 0 = 0) {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:170:12
|
||||
|
|
||||
LL | while (let 0 = 0).. {}
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:174:11
|
||||
|
|
||||
LL | while let Range { start: _, end: _ } = true..true && false {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:177:11
|
||||
|
|
||||
LL | while let Range { start: _, end: _ } = true..true || false {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:183:11
|
||||
|
|
||||
LL | while let Range { start: F, end } = F..|| true {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:189:11
|
||||
|
|
||||
LL | while let Range { start: true, end } = t..&&false {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:193:22
|
||||
|
|
||||
LL | while let true = let true = true {}
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:208:6
|
||||
|
|
||||
LL | &let 0 = 0;
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:211:6
|
||||
|
|
||||
LL | !let 0 = 0;
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:213:6
|
||||
|
|
||||
LL | *let 0 = 0;
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:215:6
|
||||
|
|
||||
LL | -let 0 = 0;
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:217:13
|
||||
|
|
||||
LL | let _ = let _ = 3;
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:225:6
|
||||
|
|
||||
LL | (let 0 = 0)?;
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:228:13
|
||||
|
|
||||
LL | true || let 0 = 0;
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:230:14
|
||||
|
|
||||
LL | (true || let 0 = 0);
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:232:22
|
||||
|
|
||||
LL | true && (true || let 0 = 0);
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:236:9
|
||||
|
|
||||
LL | x = let 0 = 0;
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:239:12
|
||||
|
|
||||
LL | true..(let 0 = 0);
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:241:8
|
||||
|
|
||||
LL | ..(let 0 = 0);
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:243:6
|
||||
|
|
||||
LL | (let 0 = 0)..;
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:246:6
|
||||
|
|
||||
LL | (let Range { start: _, end: _ } = true..true || false);
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:250:6
|
||||
|
|
||||
LL | (let true = let true = true);
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:250:17
|
||||
|
|
||||
LL | (let true = let true = true);
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:256:25
|
||||
|
|
||||
LL | let x = true && let y = 1;
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:262:19
|
||||
|
|
||||
LL | [1, 2, 3][let _ = ()]
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:267:6
|
||||
|
|
||||
LL | &let 0 = 0
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:277:17
|
||||
|
|
||||
LL | true && let 1 = 1
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:282:17
|
||||
|
|
||||
LL | true && let 1 = 1
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:287:17
|
||||
|
|
||||
LL | true && let 1 = 1
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:298:17
|
||||
|
|
||||
LL | true && let 1 = 1
|
||||
| ^^^
|
||||
|
||||
error: expressions must be enclosed in braces to be used as const generic arguments
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:298:9
|
||||
|
|
||||
LL | true && let 1 = 1
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
help: enclose the `const` expression in braces
|
||||
|
|
||||
LL | { true && let 1 = 1 }
|
||||
| + +
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:307:9
|
||||
|
|
||||
LL | if (let Some(a) = opt && true) {
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:307:9
|
||||
|
|
||||
LL | if (let Some(a) = opt && true) {
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:311:9
|
||||
|
|
||||
LL | if (let Some(a) = opt) && true {
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:311:9
|
||||
|
|
||||
LL | if (let Some(a) = opt) && true {
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:314:9
|
||||
|
|
||||
LL | if (let Some(a) = opt) && (let Some(b) = a) {
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:314:9
|
||||
|
|
||||
LL | if (let Some(a) = opt) && (let Some(b) = a) {
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:314:32
|
||||
|
|
||||
LL | if (let Some(a) = opt) && (let Some(b) = a) {
|
||||
| ^^^^^^^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:314:32
|
||||
|
|
||||
LL | if (let Some(a) = opt) && (let Some(b) = a) {
|
||||
| ^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:319:9
|
||||
|
|
||||
LL | if (let Some(a) = opt && (let Some(b) = a)) && b == 1 {
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:319:9
|
||||
|
|
||||
LL | if (let Some(a) = opt && (let Some(b) = a)) && b == 1 {
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:319:31
|
||||
|
|
||||
LL | if (let Some(a) = opt && (let Some(b) = a)) && b == 1 {
|
||||
| ^^^^^^^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:319:31
|
||||
|
|
||||
LL | if (let Some(a) = opt && (let Some(b) = a)) && b == 1 {
|
||||
| ^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:323:9
|
||||
|
|
||||
LL | if (let Some(a) = opt && (let Some(b) = a)) && true {
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:323:9
|
||||
|
|
||||
LL | if (let Some(a) = opt && (let Some(b) = a)) && true {
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:323:31
|
||||
|
|
||||
LL | if (let Some(a) = opt && (let Some(b) = a)) && true {
|
||||
| ^^^^^^^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:323:31
|
||||
|
|
||||
LL | if (let Some(a) = opt && (let Some(b) = a)) && true {
|
||||
| ^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:327:9
|
||||
|
|
||||
LL | if (let Some(a) = opt && (true)) && true {
|
||||
| ^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
note: `let`s wrapped in parentheses are not supported in a context with let chains
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:327:9
|
||||
|
|
||||
LL | if (let Some(a) = opt && (true)) && true {
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:332:22
|
||||
|
|
||||
LL | let x = (true && let y = 1);
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:337:20
|
||||
|
|
||||
LL | ([1, 2, 3][let _ = ()])
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:63:16
|
||||
|
|
||||
LL | use_expr!((let 0 = 1 && 0 == 0));
|
||||
| ^^^
|
||||
|
||||
error: expected expression, found `let` statement
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:65:16
|
||||
|
|
||||
LL | use_expr!((let 0 = 1));
|
||||
| ^^^
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:101:8
|
||||
|
|
||||
LL | if true..(let 0 = 0) {}
|
||||
| ^^^^^^^^^^^^^^^^^ expected `bool`, found `Range<bool>`
|
||||
|
|
||||
= note: expected type `bool`
|
||||
found struct `std::ops::Range<bool>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:110:12
|
||||
|
|
||||
LL | if let Range { start: _, end: _ } = true..true && false {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ ---- this expression has type `bool`
|
||||
| |
|
||||
| expected `bool`, found `Range<_>`
|
||||
|
|
||||
= note: expected type `bool`
|
||||
found struct `std::ops::Range<_>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:113:12
|
||||
|
|
||||
LL | if let Range { start: _, end: _ } = true..true || false {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ ---- this expression has type `bool`
|
||||
| |
|
||||
| expected `bool`, found `Range<_>`
|
||||
|
|
||||
= note: expected type `bool`
|
||||
found struct `std::ops::Range<_>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:119:12
|
||||
|
|
||||
LL | if let Range { start: F, end } = F..|| true {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^ - this expression has type `fn() -> bool`
|
||||
| |
|
||||
| expected fn pointer, found `Range<_>`
|
||||
|
|
||||
= note: expected fn pointer `fn() -> bool`
|
||||
found struct `std::ops::Range<_>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:125:12
|
||||
|
|
||||
LL | if let Range { start: true, end } = t..&&false {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ - this expression has type `&&bool`
|
||||
| |
|
||||
| expected `bool`, found `Range<_>`
|
||||
|
|
||||
= note: expected type `bool`
|
||||
found struct `std::ops::Range<_>`
|
||||
|
||||
error[E0277]: the `?` operator can only be applied to values that implement `Try`
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:81:20
|
||||
|
|
||||
LL | if let 0 = 0? {}
|
||||
| ^^ the `?` operator cannot be applied to type `{integer}`
|
||||
|
|
||||
= help: the trait `Try` is not implemented for `{integer}`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:165:11
|
||||
|
|
||||
LL | while true..(let 0 = 0) {}
|
||||
| ^^^^^^^^^^^^^^^^^ expected `bool`, found `Range<bool>`
|
||||
|
|
||||
= note: expected type `bool`
|
||||
found struct `std::ops::Range<bool>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:174:15
|
||||
|
|
||||
LL | while let Range { start: _, end: _ } = true..true && false {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ ---- this expression has type `bool`
|
||||
| |
|
||||
| expected `bool`, found `Range<_>`
|
||||
|
|
||||
= note: expected type `bool`
|
||||
found struct `std::ops::Range<_>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:177:15
|
||||
|
|
||||
LL | while let Range { start: _, end: _ } = true..true || false {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ ---- this expression has type `bool`
|
||||
| |
|
||||
| expected `bool`, found `Range<_>`
|
||||
|
|
||||
= note: expected type `bool`
|
||||
found struct `std::ops::Range<_>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:183:15
|
||||
|
|
||||
LL | while let Range { start: F, end } = F..|| true {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^ - this expression has type `fn() -> bool`
|
||||
| |
|
||||
| expected fn pointer, found `Range<_>`
|
||||
|
|
||||
= note: expected fn pointer `fn() -> bool`
|
||||
found struct `std::ops::Range<_>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:189:15
|
||||
|
|
||||
LL | while let Range { start: true, end } = t..&&false {}
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ - this expression has type `&&bool`
|
||||
| |
|
||||
| expected `bool`, found `Range<_>`
|
||||
|
|
||||
= note: expected type `bool`
|
||||
found struct `std::ops::Range<_>`
|
||||
|
||||
error[E0277]: the `?` operator can only be applied to values that implement `Try`
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:145:23
|
||||
|
|
||||
LL | while let 0 = 0? {}
|
||||
| ^^ the `?` operator cannot be applied to type `{integer}`
|
||||
|
|
||||
= help: the trait `Try` is not implemented for `{integer}`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:246:10
|
||||
|
|
||||
LL | (let Range { start: _, end: _ } = true..true || false);
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ ---- this expression has type `bool`
|
||||
| |
|
||||
| expected `bool`, found `Range<_>`
|
||||
|
|
||||
= note: expected type `bool`
|
||||
found struct `std::ops::Range<_>`
|
||||
|
||||
error[E0277]: the `?` operator can only be applied to values that implement `Try`
|
||||
--> $DIR/disallowed-positions-without-feature-gate.rs:221:17
|
||||
|
|
||||
LL | let 0 = 0?;
|
||||
| ^^ the `?` operator cannot be applied to type `{integer}`
|
||||
|
|
||||
= help: the trait `Try` is not implemented for `{integer}`
|
||||
|
||||
error: aborting due to 105 previous errors
|
||||
|
||||
Some errors have detailed explanations: E0277, E0308.
|
||||
For more information about an error, try `rustc --explain E0277`.
|
||||
Loading…
Reference in New Issue
Block a user