diff options
13 files changed, 468 insertions, 196 deletions
diff --git a/compiler/rustc_parse/src/parser/expr.rs b/compiler/rustc_parse/src/parser/expr.rs index 81bab0e3513..2c43563b104 100644 --- a/compiler/rustc_parse/src/parser/expr.rs +++ b/compiler/rustc_parse/src/parser/expr.rs @@ -7,6 +7,7 @@ use super::{ }; use crate::maybe_recover_from_interpolated_ty_qpath; +use core::mem; use rustc_ast::ptr::P; use rustc_ast::token::{self, Delimiter, Token, TokenKind}; use rustc_ast::tokenstream::Spacing; @@ -26,7 +27,6 @@ use rustc_session::lint::BuiltinLintDiagnostics; use rustc_span::source_map::{self, Span, Spanned}; use rustc_span::symbol::{kw, sym, Ident, Symbol}; use rustc_span::{BytePos, Pos}; -use std::mem; /// Possibly accepts an `token::Interpolated` expression (a pre-parsed expression /// dropped into the token stream, which happens while parsing the result of @@ -2343,7 +2343,9 @@ impl<'a> Parser<'a> { /// Parses the condition of a `if` or `while` expression. fn parse_cond_expr(&mut self) -> PResult<'a, P<Expr>> { - let cond = self.parse_expr_res(Restrictions::NO_STRUCT_LITERAL, None)?; + let cond = self.with_let_management(true, |local_self| { + local_self.parse_expr_res(Restrictions::NO_STRUCT_LITERAL, None) + })?; if let ExprKind::Let(..) = cond.kind { // Remove the last feature gating of a `let` expression since it's stable. @@ -2356,6 +2358,13 @@ impl<'a> Parser<'a> { /// Parses a `let $pat = $expr` pseudo-expression. /// The `let` token has already been eaten. fn parse_let_expr(&mut self, attrs: AttrVec) -> PResult<'a, P<Expr>> { + if !self.let_expr_allowed { + self.struct_span_err( + self.prev_token.span, + "expected expression, found `let` statement", + ) + .emit(); + } let lo = self.prev_token.span; let pat = self.parse_pat_allow_top_alt( None, @@ -2672,6 +2681,8 @@ impl<'a> Parser<'a> { } pub(super) fn parse_arm(&mut self) -> PResult<'a, Arm> { + // Used to check the `let_chains` and `if_let_guard` features mostly by scaning + // `&&` tokens. fn check_let_expr(expr: &Expr) -> (bool, bool) { match expr.kind { ExprKind::Binary(_, ref lhs, ref rhs) => { @@ -2694,7 +2705,7 @@ impl<'a> Parser<'a> { )?; let guard = if this.eat_keyword(kw::If) { let if_span = this.prev_token.span; - let cond = this.parse_expr()?; + let cond = this.with_let_management(true, |local_this| local_this.parse_expr())?; let (has_let_expr, does_not_have_bin_op) = check_let_expr(&cond); if has_let_expr { if does_not_have_bin_op { @@ -3256,4 +3267,17 @@ impl<'a> Parser<'a> { Ok((res, trailing)) }) } + + // Calls `f` with the internal `let_expr_allowed` set to `let_expr_allowed` and then + // sets the internal `let_expr_allowed` back to its original value. + fn with_let_management<T>( + &mut self, + let_expr_allowed: bool, + f: impl FnOnce(&mut Self) -> T, + ) -> T { + let last_let_expr_allowed = mem::replace(&mut self.let_expr_allowed, let_expr_allowed); + let rslt = f(self); + self.let_expr_allowed = last_let_expr_allowed; + rslt + } } diff --git a/compiler/rustc_parse/src/parser/mod.rs b/compiler/rustc_parse/src/parser/mod.rs index 6d6667717f0..acdf121522a 100644 --- a/compiler/rustc_parse/src/parser/mod.rs +++ b/compiler/rustc_parse/src/parser/mod.rs @@ -147,12 +147,15 @@ pub struct Parser<'a> { /// This allows us to recover when the user forget to add braces around /// multiple statements in the closure body. pub current_closure: Option<ClosureSpans>, + /// Used to track where `let`s are allowed. For example, `if true && let 1 = 1` is valid + /// but `[1, 2, 3][let _ = ()]` is not. + let_expr_allowed: bool, } // This type is used a lot, e.g. it's cloned when matching many declarative macro rules. Make sure // it doesn't unintentionally get bigger. #[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))] -rustc_data_structures::static_assert_size!(Parser<'_>, 328); +rustc_data_structures::static_assert_size!(Parser<'_>, 336); /// Stores span information about a closure. #[derive(Clone)] @@ -455,6 +458,7 @@ impl<'a> Parser<'a> { inner_attr_ranges: Default::default(), }, current_closure: None, + let_expr_allowed: false, }; // Make parser point to the first token. diff --git a/src/test/ui/mir/issue-92893.rs b/src/test/ui/mir/issue-92893.rs index d2bbb4f1101..635050f376c 100644 --- a/src/test/ui/mir/issue-92893.rs +++ b/src/test/ui/mir/issue-92893.rs @@ -1,6 +1,7 @@ struct Bug<A = [(); (let a = (), 1).1]> { //~^ `let` expressions are not supported here - //~^^ `let` expressions in this position are unstable [E0658] + //~| `let` expressions in this position are unstable [E0658] + //~| expected expression, found `let` statement a: A } diff --git a/src/test/ui/mir/issue-92893.stderr b/src/test/ui/mir/issue-92893.stderr index 063b5d66feb..4a0fcce31d7 100644 --- a/src/test/ui/mir/issue-92893.stderr +++ b/src/test/ui/mir/issue-92893.stderr @@ -1,3 +1,9 @@ +error: expected expression, found `let` statement + --> $DIR/issue-92893.rs:1:22 + | +LL | struct Bug<A = [(); (let a = (), 1).1]> { + | ^^^ + error: `let` expressions are not supported here --> $DIR/issue-92893.rs:1:22 | @@ -15,6 +21,6 @@ LL | struct Bug<A = [(); (let a = (), 1).1]> { = 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 2 previous errors +error: aborting due to 3 previous errors For more information about this error, try `rustc --explain E0658`. diff --git a/src/test/ui/rfc-2294-if-let-guard/feature-gate.rs b/src/test/ui/rfc-2294-if-let-guard/feature-gate.rs index 4a36515b991..bb1aff70d89 100644 --- a/src/test/ui/rfc-2294-if-let-guard/feature-gate.rs +++ b/src/test/ui/rfc-2294-if-let-guard/feature-gate.rs @@ -58,8 +58,10 @@ fn _macros() { } use_expr!((let 0 = 1 && 0 == 0)); //~^ ERROR `let` expressions in this position are unstable + //~| ERROR expected expression, found `let` statement use_expr!((let 0 = 1)); //~^ ERROR `let` expressions in this position are unstable + //~| ERROR expected expression, found `let` statement match () { #[cfg(FALSE)] () if let 0 = 1 => {} diff --git a/src/test/ui/rfc-2294-if-let-guard/feature-gate.stderr b/src/test/ui/rfc-2294-if-let-guard/feature-gate.stderr index 8d93fb87f7a..370a57318fd 100644 --- a/src/test/ui/rfc-2294-if-let-guard/feature-gate.stderr +++ b/src/test/ui/rfc-2294-if-let-guard/feature-gate.stderr @@ -1,5 +1,17 @@ +error: expected expression, found `let` statement + --> $DIR/feature-gate.rs:59:16 + | +LL | use_expr!((let 0 = 1 && 0 == 0)); + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/feature-gate.rs:62:16 + | +LL | use_expr!((let 0 = 1)); + | ^^^ + error: no rules expected the token `let` - --> $DIR/feature-gate.rs:69:15 + --> $DIR/feature-gate.rs:71:15 | LL | macro_rules! use_expr { | --------------------- when calling this macro @@ -58,7 +70,7 @@ LL | () if let Range { start: _, end: _ } = (true..true) && false => {} = help: you can write `if matches!(<expr>, <pattern>)` instead of `if let <pattern> = <expr>` error[E0658]: `if let` guards are experimental - --> $DIR/feature-gate.rs:65:12 + --> $DIR/feature-gate.rs:67:12 | LL | () if let 0 = 1 => {} | ^^^^^^^^^^^^ @@ -203,7 +215,7 @@ LL | use_expr!((let 0 = 1 && 0 == 0)); = help: add `#![feature(let_chains)]` to the crate attributes to enable error[E0658]: `let` expressions in this position are unstable - --> $DIR/feature-gate.rs:61:16 + --> $DIR/feature-gate.rs:62:16 | LL | use_expr!((let 0 = 1)); | ^^^^^^^^^ @@ -211,6 +223,6 @@ LL | use_expr!((let 0 = 1)); = 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 23 previous errors +error: aborting due to 25 previous errors For more information about this error, try `rustc --explain E0658`. diff --git a/src/test/ui/rfc-2497-if-let-chains/disallowed-positions.rs b/src/test/ui/rfc-2497-if-let-chains/disallowed-positions.rs index 1bd8b74240e..36b730505c2 100644 --- a/src/test/ui/rfc-2497-if-let-chains/disallowed-positions.rs +++ b/src/test/ui/rfc-2497-if-let-chains/disallowed-positions.rs @@ -81,9 +81,11 @@ fn _macros() { use_expr!((let 0 = 1 && 0 == 0)); //~^ ERROR `let` expressions are not supported here //~| ERROR `let` expressions are not supported here + //~| ERROR expected expression, found `let` statement use_expr!((let 0 = 1)); //~^ ERROR `let` expressions are not supported here //~| ERROR `let` expressions are not supported here + //~| ERROR expected expression, found `let` statement } fn nested_within_if_expr() { @@ -147,7 +149,8 @@ fn nested_within_if_expr() { //~| ERROR mismatched types //~| ERROR mismatched types - if let true = let true = true {} //~ ERROR `let` expressions are not supported here + if let true = let true = true {} + //~^ ERROR `let` expressions are not supported here } fn nested_within_while_expr() { @@ -211,7 +214,8 @@ fn nested_within_while_expr() { //~| ERROR mismatched types //~| ERROR mismatched types - while let true = let true = true {} //~ ERROR `let` expressions are not supported here + while let true = let true = true {} + //~^ ERROR `let` expressions are not supported here } fn not_error_because_clarified_intent() { @@ -225,45 +229,85 @@ fn not_error_because_clarified_intent() { } fn outside_if_and_while_expr() { - &let 0 = 0; //~ ERROR `let` expressions are not supported here + &let 0 = 0; + //~^ ERROR `let` expressions are not supported here + //~| ERROR expected expression, found `let` statement - !let 0 = 0; //~ ERROR `let` expressions are not supported here - *let 0 = 0; //~ ERROR `let` expressions are not supported here - //~^ ERROR type `bool` cannot be dereferenced - -let 0 = 0; //~ ERROR `let` expressions are not supported here - //~^ ERROR cannot apply unary operator `-` to type `bool` + !let 0 = 0; + //~^ ERROR `let` expressions are not supported here + //~| ERROR expected expression, found `let` statement + *let 0 = 0; + //~^ ERROR `let` expressions are not supported here + //~| ERROR type `bool` cannot be dereferenced + //~| ERROR expected expression, found `let` statement + -let 0 = 0; + //~^ ERROR `let` expressions are not supported here + //~| ERROR cannot apply unary operator `-` to type `bool` + //~| 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 `let` expressions are not supported here - //~^ ERROR the `?` operator can only be used in a function that returns `Result` + (let 0 = 0)?; + //~^ ERROR `let` expressions are not supported here + //~| ERROR the `?` operator can only be used in a function that returns `Result` //~| ERROR the `?` operator can only be applied to values that implement `Try` + //~| ERROR expected expression, found `let` statement - true || let 0 = 0; //~ ERROR `let` expressions are not supported here - (true || let 0 = 0); //~ ERROR `let` expressions are not supported here - true && (true || let 0 = 0); //~ ERROR `let` expressions are not supported here + true || let 0 = 0; + //~^ ERROR `let` expressions are not supported here + //~| ERROR expected expression, found `let` statement + (true || let 0 = 0); + //~^ ERROR `let` expressions are not supported here + //~| ERROR expected expression, found `let` statement + true && (true || let 0 = 0); + //~^ ERROR `let` expressions are not supported here + //~| ERROR expected expression, found `let` statement let mut x = true; - x = let 0 = 0; //~ ERROR `let` expressions are not supported here + x = let 0 = 0; + //~^ ERROR `let` expressions are not supported here + //~| ERROR expected expression, found `let` statement - true..(let 0 = 0); //~ ERROR `let` expressions are not supported here - ..(let 0 = 0); //~ ERROR `let` expressions are not supported here - (let 0 = 0)..; //~ ERROR `let` expressions are not supported here + true..(let 0 = 0); + //~^ ERROR `let` expressions are not supported here + //~| ERROR expected expression, found `let` statement + ..(let 0 = 0); + //~^ ERROR `let` expressions are not supported here + //~| ERROR expected expression, found `let` statement + (let 0 = 0)..; + //~^ ERROR `let` expressions are not supported here + //~| ERROR expected expression, found `let` statement (let Range { start: _, end: _ } = true..true || false); //~^ ERROR `let` expressions are not supported here //~| ERROR mismatched types + //~| ERROR expected expression, found `let` statement (let true = let true = true); //~^ ERROR `let` expressions are not supported here + //~| 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 `let` expressions are not supported here //~| ERROR mismatched types + //~| ERROR expected expression, found `let` statement } // Let's make sure that `let` inside const generic arguments are considered. @@ -335,4 +379,14 @@ fn with_parenthesis() { let fun = || true; if let true = (true && fun()) && (true) { } + + #[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 + } } diff --git a/src/test/ui/rfc-2497-if-let-chains/disallowed-positions.stderr b/src/test/ui/rfc-2497-if-let-chains/disallowed-positions.stderr index f7f39bd0b9a..5cf06cf4b27 100644 --- a/src/test/ui/rfc-2497-if-let-chains/disallowed-positions.stderr +++ b/src/test/ui/rfc-2497-if-let-chains/disallowed-positions.stderr @@ -1,5 +1,113 @@ +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:232:6 + | +LL | &let 0 = 0; + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:236:6 + | +LL | !let 0 = 0; + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:239:6 + | +LL | *let 0 = 0; + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:243:6 + | +LL | -let 0 = 0; + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:253:6 + | +LL | (let 0 = 0)?; + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:259:13 + | +LL | true || let 0 = 0; + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:262:14 + | +LL | (true || let 0 = 0); + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:265:22 + | +LL | true && (true || let 0 = 0); + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:270:9 + | +LL | x = let 0 = 0; + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:274:12 + | +LL | true..(let 0 = 0); + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:277:8 + | +LL | ..(let 0 = 0); + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:280:6 + | +LL | (let 0 = 0)..; + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:284:6 + | +LL | (let Range { start: _, end: _ } = true..true || false); + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:289:6 + | +LL | (let true = let true = true); + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:289:17 + | +LL | (let true = let true = true); + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:296:25 + | +LL | let x = true && let y = 1; + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:302:19 + | +LL | [1, 2, 3][let _ = ()] + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:307:6 + | +LL | &let 0 = 0 + | ^^^ + error: expressions must be enclosed in braces to be used as const generic arguments - --> $DIR/disallowed-positions.rs:293:9 + --> $DIR/disallowed-positions.rs:337:9 | LL | true && let 1 = 1 | ^^^^^^^^^^^^^^^^^ @@ -9,6 +117,30 @@ help: enclose the `const` expression in braces LL | { true && let 1 = 1 } | + + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:384:22 + | +LL | let x = (true && let y = 1); + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:389:20 + | +LL | ([1, 2, 3][let _ = ()]) + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:81:16 + | +LL | use_expr!((let 0 = 1 && 0 == 0)); + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/disallowed-positions.rs:85:16 + | +LL | use_expr!((let 0 = 1)); + | ^^^ + error: `let` expressions are not supported here --> $DIR/disallowed-positions.rs:29:9 | @@ -270,33 +402,33 @@ LL | use_expr!((let 0 = 1 && 0 == 0)); | ^^^^^^^^^^^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:84:16 + --> $DIR/disallowed-positions.rs:85:16 | LL | use_expr!((let 0 = 1)); | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:84:16 + --> $DIR/disallowed-positions.rs:85:16 | LL | use_expr!((let 0 = 1)); | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:84:16 + --> $DIR/disallowed-positions.rs:85:16 | LL | use_expr!((let 0 = 1)); | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:84:16 + --> $DIR/disallowed-positions.rs:85:16 | LL | use_expr!((let 0 = 1)); | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:90:9 + --> $DIR/disallowed-positions.rs:92:9 | LL | if &let 0 = 0 {} | ^^^^^^^^^ @@ -304,7 +436,7 @@ LL | if &let 0 = 0 {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:93:9 + --> $DIR/disallowed-positions.rs:95:9 | LL | if !let 0 = 0 {} | ^^^^^^^^^ @@ -312,7 +444,7 @@ LL | if !let 0 = 0 {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:94:9 + --> $DIR/disallowed-positions.rs:96:9 | LL | if *let 0 = 0 {} | ^^^^^^^^^ @@ -320,7 +452,7 @@ LL | if *let 0 = 0 {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:96:9 + --> $DIR/disallowed-positions.rs:98:9 | LL | if -let 0 = 0 {} | ^^^^^^^^^ @@ -328,72 +460,72 @@ LL | if -let 0 = 0 {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:104:9 + --> $DIR/disallowed-positions.rs:106:9 | LL | if (let 0 = 0)? {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:104:9 + --> $DIR/disallowed-positions.rs:106:9 | LL | if (let 0 = 0)? {} | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:108:16 + --> $DIR/disallowed-positions.rs:110:16 | LL | if true || let 0 = 0 {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `||` operators are not supported in let chain expressions - --> $DIR/disallowed-positions.rs:108:13 + --> $DIR/disallowed-positions.rs:110:13 | LL | if true || let 0 = 0 {} | ^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:109:17 + --> $DIR/disallowed-positions.rs:111:17 | LL | if (true || let 0 = 0) {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `||` operators are not supported in let chain expressions - --> $DIR/disallowed-positions.rs:109:14 + --> $DIR/disallowed-positions.rs:111:14 | LL | if (true || let 0 = 0) {} | ^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:110:25 + --> $DIR/disallowed-positions.rs:112:25 | LL | if true && (true || let 0 = 0) {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `||` operators are not supported in let chain expressions - --> $DIR/disallowed-positions.rs:110:22 + --> $DIR/disallowed-positions.rs:112:22 | LL | if true && (true || let 0 = 0) {} | ^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:111:25 + --> $DIR/disallowed-positions.rs:113:25 | LL | if true || (true && let 0 = 0) {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:111:17 + --> $DIR/disallowed-positions.rs:113:17 | LL | if true || (true && let 0 = 0) {} | ^^^^^^^^^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:114:12 + --> $DIR/disallowed-positions.rs:116:12 | LL | if x = let 0 = 0 {} | ^^^^^^^^^ @@ -401,46 +533,46 @@ LL | if x = let 0 = 0 {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:117:15 + --> $DIR/disallowed-positions.rs:119:15 | LL | if true..(let 0 = 0) {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:117:15 + --> $DIR/disallowed-positions.rs:119:15 | LL | if true..(let 0 = 0) {} | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:119:11 + --> $DIR/disallowed-positions.rs:121:11 | LL | if ..(let 0 = 0) {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:119:11 + --> $DIR/disallowed-positions.rs:121:11 | LL | if ..(let 0 = 0) {} | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:121:9 + --> $DIR/disallowed-positions.rs:123:9 | LL | if (let 0 = 0).. {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:121:9 + --> $DIR/disallowed-positions.rs:123:9 | LL | if (let 0 = 0).. {} | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:125:8 + --> $DIR/disallowed-positions.rs:127:8 | LL | if let Range { start: _, end: _ } = true..true && false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -448,7 +580,7 @@ LL | if let Range { start: _, end: _ } = true..true && false {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:129:8 + --> $DIR/disallowed-positions.rs:131:8 | LL | if let Range { start: _, end: _ } = true..true || false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -456,7 +588,7 @@ LL | if let Range { start: _, end: _ } = true..true || false {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:136:8 + --> $DIR/disallowed-positions.rs:138:8 | LL | if let Range { start: F, end } = F..|| true {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -464,7 +596,7 @@ LL | if let Range { start: F, end } = F..|| true {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:144:8 + --> $DIR/disallowed-positions.rs:146:8 | LL | if let Range { start: true, end } = t..&&false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -472,7 +604,7 @@ LL | if let Range { start: true, end } = t..&&false {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:150:19 + --> $DIR/disallowed-positions.rs:152:19 | LL | if let true = let true = true {} | ^^^^^^^^^^^^^^^ @@ -480,7 +612,7 @@ LL | if let true = let true = true {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:154:12 + --> $DIR/disallowed-positions.rs:157:12 | LL | while &let 0 = 0 {} | ^^^^^^^^^ @@ -488,7 +620,7 @@ LL | while &let 0 = 0 {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:157:12 + --> $DIR/disallowed-positions.rs:160:12 | LL | while !let 0 = 0 {} | ^^^^^^^^^ @@ -496,7 +628,7 @@ LL | while !let 0 = 0 {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:158:12 + --> $DIR/disallowed-positions.rs:161:12 | LL | while *let 0 = 0 {} | ^^^^^^^^^ @@ -504,7 +636,7 @@ LL | while *let 0 = 0 {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:160:12 + --> $DIR/disallowed-positions.rs:163:12 | LL | while -let 0 = 0 {} | ^^^^^^^^^ @@ -512,72 +644,72 @@ LL | while -let 0 = 0 {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:168:12 + --> $DIR/disallowed-positions.rs:171:12 | LL | while (let 0 = 0)? {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:168:12 + --> $DIR/disallowed-positions.rs:171:12 | LL | while (let 0 = 0)? {} | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:172:19 + --> $DIR/disallowed-positions.rs:175:19 | LL | while true || let 0 = 0 {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `||` operators are not supported in let chain expressions - --> $DIR/disallowed-positions.rs:172:16 + --> $DIR/disallowed-positions.rs:175:16 | LL | while true || let 0 = 0 {} | ^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:173:20 + --> $DIR/disallowed-positions.rs:176:20 | LL | while (true || let 0 = 0) {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `||` operators are not supported in let chain expressions - --> $DIR/disallowed-positions.rs:173:17 + --> $DIR/disallowed-positions.rs:176:17 | LL | while (true || let 0 = 0) {} | ^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:174:28 + --> $DIR/disallowed-positions.rs:177:28 | LL | while true && (true || let 0 = 0) {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `||` operators are not supported in let chain expressions - --> $DIR/disallowed-positions.rs:174:25 + --> $DIR/disallowed-positions.rs:177:25 | LL | while true && (true || let 0 = 0) {} | ^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:175:28 + --> $DIR/disallowed-positions.rs:178:28 | LL | while true || (true && let 0 = 0) {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:175:20 + --> $DIR/disallowed-positions.rs:178:20 | LL | while true || (true && let 0 = 0) {} | ^^^^^^^^^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:178:15 + --> $DIR/disallowed-positions.rs:181:15 | LL | while x = let 0 = 0 {} | ^^^^^^^^^ @@ -585,46 +717,46 @@ LL | while x = let 0 = 0 {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:181:18 + --> $DIR/disallowed-positions.rs:184:18 | LL | while true..(let 0 = 0) {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:181:18 + --> $DIR/disallowed-positions.rs:184:18 | LL | while true..(let 0 = 0) {} | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:183:14 + --> $DIR/disallowed-positions.rs:186:14 | LL | while ..(let 0 = 0) {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:183:14 + --> $DIR/disallowed-positions.rs:186:14 | LL | while ..(let 0 = 0) {} | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:185:12 + --> $DIR/disallowed-positions.rs:188:12 | LL | while (let 0 = 0).. {} | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:185:12 + --> $DIR/disallowed-positions.rs:188:12 | LL | while (let 0 = 0).. {} | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:189:11 + --> $DIR/disallowed-positions.rs:192:11 | LL | while let Range { start: _, end: _ } = true..true && false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -632,7 +764,7 @@ LL | while let Range { start: _, end: _ } = true..true && false {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:193:11 + --> $DIR/disallowed-positions.rs:196:11 | LL | while let Range { start: _, end: _ } = true..true || false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -640,7 +772,7 @@ LL | while let Range { start: _, end: _ } = true..true || false {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:200:11 + --> $DIR/disallowed-positions.rs:203:11 | LL | while let Range { start: F, end } = F..|| true {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -648,7 +780,7 @@ LL | while let Range { start: F, end } = F..|| true {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:208:11 + --> $DIR/disallowed-positions.rs:211:11 | LL | while let Range { start: true, end } = t..&&false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -656,7 +788,7 @@ LL | while let Range { start: true, end } = t..&&false {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:214:22 + --> $DIR/disallowed-positions.rs:217:22 | LL | while let true = let true = true {} | ^^^^^^^^^^^^^^^ @@ -664,7 +796,7 @@ LL | while let true = let true = true {} = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:228:6 + --> $DIR/disallowed-positions.rs:232:6 | LL | &let 0 = 0; | ^^^^^^^^^ @@ -672,7 +804,7 @@ LL | &let 0 = 0; = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:230:6 + --> $DIR/disallowed-positions.rs:236:6 | LL | !let 0 = 0; | ^^^^^^^^^ @@ -680,7 +812,7 @@ LL | !let 0 = 0; = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:231:6 + --> $DIR/disallowed-positions.rs:239:6 | LL | *let 0 = 0; | ^^^^^^^^^ @@ -688,7 +820,7 @@ LL | *let 0 = 0; = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:233:6 + --> $DIR/disallowed-positions.rs:243:6 | LL | -let 0 = 0; | ^^^^^^^^^ @@ -696,59 +828,59 @@ LL | -let 0 = 0; = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:241:6 + --> $DIR/disallowed-positions.rs:253:6 | LL | (let 0 = 0)?; | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:241:6 + --> $DIR/disallowed-positions.rs:253:6 | LL | (let 0 = 0)?; | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:245:13 + --> $DIR/disallowed-positions.rs:259:13 | LL | true || let 0 = 0; | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `||` operators are not supported in let chain expressions - --> $DIR/disallowed-positions.rs:245:10 + --> $DIR/disallowed-positions.rs:259:10 | LL | true || let 0 = 0; | ^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:246:14 + --> $DIR/disallowed-positions.rs:262:14 | LL | (true || let 0 = 0); | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `||` operators are not supported in let chain expressions - --> $DIR/disallowed-positions.rs:246:11 + --> $DIR/disallowed-positions.rs:262:11 | LL | (true || let 0 = 0); | ^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:247:22 + --> $DIR/disallowed-positions.rs:265:22 | LL | true && (true || let 0 = 0); | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `||` operators are not supported in let chain expressions - --> $DIR/disallowed-positions.rs:247:19 + --> $DIR/disallowed-positions.rs:265:19 | LL | true && (true || let 0 = 0); | ^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:250:9 + --> $DIR/disallowed-positions.rs:270:9 | LL | x = let 0 = 0; | ^^^^^^^^^ @@ -756,46 +888,46 @@ LL | x = let 0 = 0; = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:252:12 + --> $DIR/disallowed-positions.rs:274:12 | LL | true..(let 0 = 0); | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:252:12 + --> $DIR/disallowed-positions.rs:274:12 | LL | true..(let 0 = 0); | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:253:8 + --> $DIR/disallowed-positions.rs:277:8 | LL | ..(let 0 = 0); | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:253:8 + --> $DIR/disallowed-positions.rs:277:8 | LL | ..(let 0 = 0); | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:254:6 + --> $DIR/disallowed-positions.rs:280:6 | LL | (let 0 = 0)..; | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:254:6 + --> $DIR/disallowed-positions.rs:280:6 | LL | (let 0 = 0)..; | ^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:256:6 + --> $DIR/disallowed-positions.rs:284:6 | LL | (let Range { start: _, end: _ } = true..true || false); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -803,20 +935,20 @@ LL | (let Range { start: _, end: _ } = true..true || false); = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:260:6 + --> $DIR/disallowed-positions.rs:289:6 | LL | (let true = let true = true); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:260:6 + --> $DIR/disallowed-positions.rs:289:6 | LL | (let true = let true = true); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:264:6 + --> $DIR/disallowed-positions.rs:307:6 | LL | &let 0 = 0 | ^^^^^^^^^ @@ -824,7 +956,7 @@ LL | &let 0 = 0 = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:275:17 + --> $DIR/disallowed-positions.rs:319:17 | LL | true && let 1 = 1 | ^^^^^^^^^ @@ -832,7 +964,7 @@ LL | true && let 1 = 1 = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:279:17 + --> $DIR/disallowed-positions.rs:323:17 | LL | true && let 1 = 1 | ^^^^^^^^^ @@ -840,7 +972,7 @@ LL | true && let 1 = 1 = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:283:17 + --> $DIR/disallowed-positions.rs:327:17 | LL | true && let 1 = 1 | ^^^^^^^^^ @@ -848,7 +980,7 @@ LL | true && let 1 = 1 = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:293:17 + --> $DIR/disallowed-positions.rs:337:17 | LL | true && let 1 = 1 | ^^^^^^^^^ @@ -856,124 +988,124 @@ LL | true && let 1 = 1 = note: only supported directly in conditions of `if` and `while` expressions error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:302:9 + --> $DIR/disallowed-positions.rs:346:9 | LL | if (let Some(a) = opt && true) { | ^^^^^^^^^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:302:9 + --> $DIR/disallowed-positions.rs:346:9 | LL | if (let Some(a) = opt && true) { | ^^^^^^^^^^^^^^^^^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:306:9 + --> $DIR/disallowed-positions.rs:350:9 | LL | if (let Some(a) = opt) && true { | ^^^^^^^^^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:306:9 + --> $DIR/disallowed-positions.rs:350:9 | LL | if (let Some(a) = opt) && true { | ^^^^^^^^^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:309:9 + --> $DIR/disallowed-positions.rs:353:9 | LL | if (let Some(a) = opt) && (let Some(b) = a) { | ^^^^^^^^^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:309:9 + --> $DIR/disallowed-positions.rs:353:9 | LL | if (let Some(a) = opt) && (let Some(b) = a) { | ^^^^^^^^^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:309:32 + --> $DIR/disallowed-positions.rs:353:32 | LL | if (let Some(a) = opt) && (let Some(b) = a) { | ^^^^^^^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:309:32 + --> $DIR/disallowed-positions.rs:353:32 | LL | if (let Some(a) = opt) && (let Some(b) = a) { | ^^^^^^^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:316:9 + --> $DIR/disallowed-positions.rs:360:9 | LL | if (let Some(a) = opt && (let Some(b) = a)) && b == 1 { | ^^^^^^^^^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:316:9 + --> $DIR/disallowed-positions.rs:360:9 | LL | if (let Some(a) = opt && (let Some(b) = a)) && b == 1 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:316:31 + --> $DIR/disallowed-positions.rs:360:31 | LL | if (let Some(a) = opt && (let Some(b) = a)) && b == 1 { | ^^^^^^^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:316:31 + --> $DIR/disallowed-positions.rs:360:31 | LL | if (let Some(a) = opt && (let Some(b) = a)) && b == 1 { | ^^^^^^^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:320:9 + --> $DIR/disallowed-positions.rs:364:9 | LL | if (let Some(a) = opt && (let Some(b) = a)) && true { | ^^^^^^^^^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:320:9 + --> $DIR/disallowed-positions.rs:364:9 | LL | if (let Some(a) = opt && (let Some(b) = a)) && true { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:320:31 + --> $DIR/disallowed-positions.rs:364:31 | LL | if (let Some(a) = opt && (let Some(b) = a)) && true { | ^^^^^^^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:320:31 + --> $DIR/disallowed-positions.rs:364:31 | LL | if (let Some(a) = opt && (let Some(b) = a)) && true { | ^^^^^^^^^^^^^^^ error: `let` expressions are not supported here - --> $DIR/disallowed-positions.rs:324:9 + --> $DIR/disallowed-positions.rs:368:9 | LL | if (let Some(a) = opt && (true)) && true { | ^^^^^^^^^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains - --> $DIR/disallowed-positions.rs:324:9 + --> $DIR/disallowed-positions.rs:368:9 | LL | if (let Some(a) = opt && (true)) && true { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:90:8 + --> $DIR/disallowed-positions.rs:92:8 | LL | if &let 0 = 0 {} | ^^^^^^^^^^ expected `bool`, found `&bool` @@ -985,19 +1117,19 @@ LL + if let 0 = 0 {} | error[E0614]: type `bool` cannot be dereferenced - --> $DIR/disallowed-positions.rs:94:8 + --> $DIR/disallowed-positions.rs:96:8 | LL | if *let 0 = 0 {} | ^^^^^^^^^^ error[E0600]: cannot apply unary operator `-` to type `bool` - --> $DIR/disallowed-positions.rs:96:8 + --> $DIR/disallowed-positions.rs:98:8 | LL | if -let 0 = 0 {} | ^^^^^^^^^^ cannot apply unary operator `-` error[E0277]: the `?` operator can only be applied to values that implement `Try` - --> $DIR/disallowed-positions.rs:104:8 + --> $DIR/disallowed-positions.rs:106:8 | LL | if (let 0 = 0)? {} | ^^^^^^^^^^^^ the `?` operator cannot be applied to type `bool` @@ -1005,7 +1137,7 @@ LL | if (let 0 = 0)? {} = help: the trait `Try` is not implemented for `bool` error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`) - --> $DIR/disallowed-positions.rs:104:19 + --> $DIR/disallowed-positions.rs:106:19 | LL | / fn nested_within_if_expr() { LL | | if &let 0 = 0 {} @@ -1015,14 +1147,14 @@ LL | | LL | | if (let 0 = 0)? {} | | ^ cannot use the `?` operator in a function that returns `()` ... | -LL | | if let true = let true = true {} +LL | | LL | | } | |_- this function should return `Result` or `Option` to accept `?` | = help: the trait `FromResidual<_>` is not implemented for `()` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:114:8 + --> $DIR/disallowed-positions.rs:116:8 | LL | if x = let 0 = 0 {} | ^^^^^^^^^^^^^ expected `bool`, found `()` @@ -1033,7 +1165,7 @@ LL | if x == let 0 = 0 {} | ~~ error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:117:8 + --> $DIR/disallowed-positions.rs:119:8 | LL | if true..(let 0 = 0) {} | ^^^^^^^^^^^^^^^^^ expected `bool`, found struct `std::ops::Range` @@ -1042,7 +1174,7 @@ LL | if true..(let 0 = 0) {} found struct `std::ops::Range<bool>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:119:8 + --> $DIR/disallowed-positions.rs:121:8 | LL | if ..(let 0 = 0) {} | ^^^^^^^^^^^^^ expected `bool`, found struct `RangeTo` @@ -1051,7 +1183,7 @@ LL | if ..(let 0 = 0) {} found struct `RangeTo<bool>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:121:8 + --> $DIR/disallowed-positions.rs:123:8 | LL | if (let 0 = 0).. {} | ^^^^^^^^^^^^^ expected `bool`, found struct `RangeFrom` @@ -1060,7 +1192,7 @@ LL | if (let 0 = 0).. {} found struct `RangeFrom<bool>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:125:12 + --> $DIR/disallowed-positions.rs:127:12 | LL | if let Range { start: _, end: _ } = true..true && false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^ ---- this expression has type `bool` @@ -1071,7 +1203,7 @@ LL | if let Range { start: _, end: _ } = true..true && false {} found struct `std::ops::Range<_>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:125:8 + --> $DIR/disallowed-positions.rs:127:8 | LL | if let Range { start: _, end: _ } = true..true && false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found struct `std::ops::Range` @@ -1080,7 +1212,7 @@ LL | if let Range { start: _, end: _ } = true..true && false {} found struct `std::ops::Range<bool>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:129:12 + --> $DIR/disallowed-positions.rs:131:12 | LL | if let Range { start: _, end: _ } = true..true || false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^ ---- this expression has type `bool` @@ -1091,7 +1223,7 @@ LL | if let Range { start: _, end: _ } = true..true || false {} found struct `std::ops::Range<_>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:129:8 + --> $DIR/disallowed-positions.rs:131:8 | LL | if let Range { start: _, end: _ } = true..true || false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found struct `std::ops::Range` @@ -1100,7 +1232,7 @@ LL | if let Range { start: _, end: _ } = true..true || false {} found struct `std::ops::Range<bool>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:136:12 + --> $DIR/disallowed-positions.rs:138:12 | LL | if let Range { start: F, end } = F..|| true {} | ^^^^^^^^^^^^^^^^^^^^^^^ - this expression has type `fn() -> bool` @@ -1111,20 +1243,20 @@ LL | if let Range { start: F, end } = F..|| true {} found struct `std::ops::Range<_>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:136:41 + --> $DIR/disallowed-positions.rs:138:41 | LL | if let Range { start: F, end } = F..|| true {} | ^^^^^^^ expected `bool`, found closure | = note: expected type `bool` - found closure `[closure@$DIR/disallowed-positions.rs:136:41: 136:48]` + found closure `[closure@$DIR/disallowed-positions.rs:138:41: 138:48]` help: use parentheses to call this closure | LL | if let Range { start: F, end } = F..(|| true)() {} | + +++ error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:136:8 + --> $DIR/disallowed-positions.rs:138:8 | LL | if let Range { start: F, end } = F..|| true {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found struct `std::ops::Range` @@ -1133,7 +1265,7 @@ LL | if let Range { start: F, end } = F..|| true {} found struct `std::ops::Range<bool>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:144:12 + --> $DIR/disallowed-positions.rs:146:12 | LL | if let Range { start: true, end } = t..&&false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^ - this expression has type `&&bool` @@ -1144,7 +1276,7 @@ LL | if let Range { start: true, end } = t..&&false {} found struct `std::ops::Range<_>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:144:44 + --> $DIR/disallowed-positions.rs:146:44 | LL | if let Range { start: true, end } = t..&&false {} | ^^^^^^^ expected `bool`, found `&&bool` @@ -1156,7 +1288,7 @@ LL + if let Range { start: true, end } = t..false {} | error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:144:8 + --> $DIR/disallowed-positions.rs:146:8 | LL | if let Range { start: true, end } = t..&&false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found struct `std::ops::Range` @@ -1165,7 +1297,7 @@ LL | if let Range { start: true, end } = t..&&false {} found struct `std::ops::Range<bool>` error[E0277]: the `?` operator can only be applied to values that implement `Try` - --> $DIR/disallowed-positions.rs:100:20 + --> $DIR/disallowed-positions.rs:102:20 | LL | if let 0 = 0? {} | ^^ the `?` operator cannot be applied to type `{integer}` @@ -1173,7 +1305,7 @@ LL | if let 0 = 0? {} = help: the trait `Try` is not implemented for `{integer}` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:154:11 + --> $DIR/disallowed-positions.rs:157:11 | LL | while &let 0 = 0 {} | ^^^^^^^^^^ expected `bool`, found `&bool` @@ -1185,19 +1317,19 @@ LL + while let 0 = 0 {} | error[E0614]: type `bool` cannot be dereferenced - --> $DIR/disallowed-positions.rs:158:11 + --> $DIR/disallowed-positions.rs:161:11 | LL | while *let 0 = 0 {} | ^^^^^^^^^^ error[E0600]: cannot apply unary operator `-` to type `bool` - --> $DIR/disallowed-positions.rs:160:11 + --> $DIR/disallowed-positions.rs:163:11 | LL | while -let 0 = 0 {} | ^^^^^^^^^^ cannot apply unary operator `-` error[E0277]: the `?` operator can only be applied to values that implement `Try` - --> $DIR/disallowed-positions.rs:168:11 + --> $DIR/disallowed-positions.rs:171:11 | LL | while (let 0 = 0)? {} | ^^^^^^^^^^^^ the `?` operator cannot be applied to type `bool` @@ -1205,7 +1337,7 @@ LL | while (let 0 = 0)? {} = help: the trait `Try` is not implemented for `bool` error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`) - --> $DIR/disallowed-positions.rs:168:22 + --> $DIR/disallowed-positions.rs:171:22 | LL | / fn nested_within_while_expr() { LL | | while &let 0 = 0 {} @@ -1215,14 +1347,14 @@ LL | | LL | | while (let 0 = 0)? {} | | ^ cannot use the `?` operator in a function that returns `()` ... | -LL | | while let true = let true = true {} +LL | | LL | | } | |_- this function should return `Result` or `Option` to accept `?` | = help: the trait `FromResidual<_>` is not implemented for `()` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:178:11 + --> $DIR/disallowed-positions.rs:181:11 | LL | while x = let 0 = 0 {} | ^^^^^^^^^^^^^ expected `bool`, found `()` @@ -1233,7 +1365,7 @@ LL | while x == let 0 = 0 {} | ~~ error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:181:11 + --> $DIR/disallowed-positions.rs:184:11 | LL | while true..(let 0 = 0) {} | ^^^^^^^^^^^^^^^^^ expected `bool`, found struct `std::ops::Range` @@ -1242,7 +1374,7 @@ LL | while true..(let 0 = 0) {} found struct `std::ops::Range<bool>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:183:11 + --> $DIR/disallowed-positions.rs:186:11 | LL | while ..(let 0 = 0) {} | ^^^^^^^^^^^^^ expected `bool`, found struct `RangeTo` @@ -1251,7 +1383,7 @@ LL | while ..(let 0 = 0) {} found struct `RangeTo<bool>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:185:11 + --> $DIR/disallowed-positions.rs:188:11 | LL | while (let 0 = 0).. {} | ^^^^^^^^^^^^^ expected `bool`, found struct `RangeFrom` @@ -1260,7 +1392,7 @@ LL | while (let 0 = 0).. {} found struct `RangeFrom<bool>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:189:15 + --> $DIR/disallowed-positions.rs:192:15 | LL | while let Range { start: _, end: _ } = true..true && false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^ ---- this expression has type `bool` @@ -1271,7 +1403,7 @@ LL | while let Range { start: _, end: _ } = true..true && false {} found struct `std::ops::Range<_>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:189:11 + --> $DIR/disallowed-positions.rs:192:11 | LL | while let Range { start: _, end: _ } = true..true && false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found struct `std::ops::Range` @@ -1280,7 +1412,7 @@ LL | while let Range { start: _, end: _ } = true..true && false {} found struct `std::ops::Range<bool>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:193:15 + --> $DIR/disallowed-positions.rs:196:15 | LL | while let Range { start: _, end: _ } = true..true || false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^ ---- this expression has type `bool` @@ -1291,7 +1423,7 @@ LL | while let Range { start: _, end: _ } = true..true || false {} found struct `std::ops::Range<_>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:193:11 + --> $DIR/disallowed-positions.rs:196:11 | LL | while let Range { start: _, end: _ } = true..true || false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found struct `std::ops::Range` @@ -1300,7 +1432,7 @@ LL | while let Range { start: _, end: _ } = true..true || false {} found struct `std::ops::Range<bool>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:200:15 + --> $DIR/disallowed-positions.rs:203:15 | LL | while let Range { start: F, end } = F..|| true {} | ^^^^^^^^^^^^^^^^^^^^^^^ - this expression has type `fn() -> bool` @@ -1311,20 +1443,20 @@ LL | while let Range { start: F, end } = F..|| true {} found struct `std::ops::Range<_>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:200:44 + --> $DIR/disallowed-positions.rs:203:44 | LL | while let Range { start: F, end } = F..|| true {} | ^^^^^^^ expected `bool`, found closure | = note: expected type `bool` - found closure `[closure@$DIR/disallowed-positions.rs:200:44: 200:51]` + found closure `[closure@$DIR/disallowed-positions.rs:203:44: 203:51]` help: use parentheses to call this closure | LL | while let Range { start: F, end } = F..(|| true)() {} | + +++ error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:200:11 + --> $DIR/disallowed-positions.rs:203:11 | LL | while let Range { start: F, end } = F..|| true {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found struct `std::ops::Range` @@ -1333,7 +1465,7 @@ LL | while let Range { start: F, end } = F..|| true {} found struct `std::ops::Range<bool>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:208:15 + --> $DIR/disallowed-positions.rs:211:15 | LL | while let Range { start: true, end } = t..&&false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^ - this expression has type `&&bool` @@ -1344,7 +1476,7 @@ LL | while let Range { start: true, end } = t..&&false {} found struct `std::ops::Range<_>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:208:47 + --> $DIR/disallowed-positions.rs:211:47 | LL | while let Range { start: true, end } = t..&&false {} | ^^^^^^^ expected `bool`, found `&&bool` @@ -1356,7 +1488,7 @@ LL + while let Range { start: true, end } = t..false {} | error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:208:11 + --> $DIR/disallowed-positions.rs:211:11 | LL | while let Range { start: true, end } = t..&&false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `bool`, found struct `std::ops::Range` @@ -1365,7 +1497,7 @@ LL | while let Range { start: true, end } = t..&&false {} found struct `std::ops::Range<bool>` error[E0277]: the `?` operator can only be applied to values that implement `Try` - --> $DIR/disallowed-positions.rs:164:23 + --> $DIR/disallowed-positions.rs:167:23 | LL | while let 0 = 0? {} | ^^ the `?` operator cannot be applied to type `{integer}` @@ -1373,19 +1505,19 @@ LL | while let 0 = 0? {} = help: the trait `Try` is not implemented for `{integer}` error[E0614]: type `bool` cannot be dereferenced - --> $DIR/disallowed-positions.rs:231:5 + --> $DIR/disallowed-positions.rs:239:5 | LL | *let 0 = 0; | ^^^^^^^^^^ error[E0600]: cannot apply unary operator `-` to type `bool` - --> $DIR/disallowed-positions.rs:233:5 + --> $DIR/disallowed-positions.rs:243:5 | LL | -let 0 = 0; | ^^^^^^^^^^ cannot apply unary operator `-` error[E0277]: the `?` operator can only be applied to values that implement `Try` - --> $DIR/disallowed-positions.rs:241:5 + --> $DIR/disallowed-positions.rs:253:5 | LL | (let 0 = 0)?; | ^^^^^^^^^^^^ the `?` operator cannot be applied to type `bool` @@ -1393,12 +1525,12 @@ LL | (let 0 = 0)?; = help: the trait `Try` is not implemented for `bool` error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`) - --> $DIR/disallowed-positions.rs:241:16 + --> $DIR/disallowed-positions.rs:253:16 | LL | / fn outside_if_and_while_expr() { LL | | &let 0 = 0; LL | | -LL | | !let 0 = 0; +LL | | ... | LL | | (let 0 = 0)?; | | ^ cannot use the `?` operator in a function that returns `()` @@ -1410,7 +1542,7 @@ LL | | } = help: the trait `FromResidual<_>` is not implemented for `()` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:256:10 + --> $DIR/disallowed-positions.rs:284:10 | LL | (let Range { start: _, end: _ } = true..true || false); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ ---- this expression has type `bool` @@ -1421,7 +1553,7 @@ LL | (let Range { start: _, end: _ } = true..true || false); found struct `std::ops::Range<_>` error[E0308]: mismatched types - --> $DIR/disallowed-positions.rs:264:5 + --> $DIR/disallowed-positions.rs:307:5 | LL | fn outside_if_and_while_expr() { | - help: try adding a return type: `-> &bool` @@ -1430,14 +1562,14 @@ LL | &let 0 = 0 | ^^^^^^^^^^ expected `()`, found `&bool` error[E0277]: the `?` operator can only be applied to values that implement `Try` - --> $DIR/disallowed-positions.rs:237:17 + --> $DIR/disallowed-positions.rs:249:17 | 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 134 previous errors +error: aborting due to 156 previous errors Some errors have detailed explanations: E0277, E0308, E0600, E0614. For more information about an error, try `rustc --explain E0277`. diff --git a/src/test/ui/rfc-2497-if-let-chains/ensure-that-let-else-does-not-interact-with-let-chains.rs b/src/test/ui/rfc-2497-if-let-chains/ensure-that-let-else-does-not-interact-with-let-chains.rs index e66caa19ec9..12befc637c7 100644 --- a/src/test/ui/rfc-2497-if-let-chains/ensure-that-let-else-does-not-interact-with-let-chains.rs +++ b/src/test/ui/rfc-2497-if-let-chains/ensure-that-let-else-does-not-interact-with-let-chains.rs @@ -17,6 +17,7 @@ fn main() { //~| ERROR `let` expressions are not supported here //~| ERROR mismatched types //~| ERROR mismatched types + //~| ERROR expected expression, found `let` statement return; }; diff --git a/src/test/ui/rfc-2497-if-let-chains/ensure-that-let-else-does-not-interact-with-let-chains.stderr b/src/test/ui/rfc-2497-if-let-chains/ensure-that-let-else-does-not-interact-with-let-chains.stderr index eea8ed0c963..498a112fa9b 100644 --- a/src/test/ui/rfc-2497-if-let-chains/ensure-that-let-else-does-not-interact-with-let-chains.stderr +++ b/src/test/ui/rfc-2497-if-let-chains/ensure-that-let-else-does-not-interact-with-let-chains.stderr @@ -9,6 +9,12 @@ help: wrap the expression in parentheses LL | let Some(n) = (opt && n == 1) else { | + + +error: expected expression, found `let` statement + --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:15:26 + | +LL | let Some(n) = opt && let another = n else { + | ^^^ + error: a `&&` expression cannot be directly assigned in `let...else` --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:15:19 | @@ -21,43 +27,43 @@ LL | let Some(n) = (opt && let another = n) else { | + + error: this `if` expression is missing a block after the condition - --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:23:5 + --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:24:5 | LL | if let Some(n) = opt else { | ^^ | help: add a block here - --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:23:25 + --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:24:25 | LL | if let Some(n) = opt else { | ^ error: this `if` expression is missing a block after the condition - --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:27:5 + --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:28:5 | LL | if let Some(n) = opt && n == 1 else { | ^^ | help: add a block here - --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:27:35 + --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:28:35 | LL | if let Some(n) = opt && n == 1 else { | ^ error: this `if` expression is missing a block after the condition - --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:31:5 + --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:32:5 | LL | if let Some(n) = opt && let another = n else { | ^^ | help: add a block here - --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:31:44 + --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:32:44 | LL | if let Some(n) = opt && let another = n else { | ^ error: expected `{`, found keyword `else` - --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:37:33 + --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:38:33 | LL | while let Some(n) = opt else { | ----- ----------------- ^^^^ expected `{` @@ -66,7 +72,7 @@ LL | while let Some(n) = opt else { | while parsing the body of this `while` expression error: expected `{`, found keyword `else` - --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:43:43 + --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:44:43 | LL | while let Some(n) = opt && n == 1 else { | ----- --------------------------- ^^^^ expected `{` @@ -75,7 +81,7 @@ LL | while let Some(n) = opt && n == 1 else { | while parsing the body of this `while` expression error: expected `{`, found keyword `else` - --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:49:52 + --> $DIR/ensure-that-let-else-does-not-interact-with-let-chains.rs:50:52 | LL | while let Some(n) = opt && let another = n else { | ----- ------------------------------------ ^^^^ expected `{` @@ -131,6 +137,6 @@ LL | let Some(n) = opt && let another = n else { = note: expected type `bool` found enum `Option<_>` -error: aborting due to 13 previous errors +error: aborting due to 14 previous errors For more information about this error, try `rustc --explain E0308`. diff --git a/src/test/ui/rfc-2497-if-let-chains/feature-gate.rs b/src/test/ui/rfc-2497-if-let-chains/feature-gate.rs index ac60bc7e57f..87718211308 100644 --- a/src/test/ui/rfc-2497-if-let-chains/feature-gate.rs +++ b/src/test/ui/rfc-2497-if-let-chains/feature-gate.rs @@ -39,6 +39,7 @@ fn _macros() { noop_expr!((let 0 = 1)); //~^ ERROR `let` expressions in this position are unstable [E0658] + //~| ERROR expected expression, found `let` statement macro_rules! use_expr { ($e:expr) => { @@ -48,9 +49,9 @@ fn _macros() { } #[cfg(FALSE)] (let 0 = 1); //~^ ERROR `let` expressions in this position are unstable [E0658] + //~| ERROR expected expression, found `let` statement use_expr!(let 0 = 1); //~^ ERROR no rules expected the token `let` - // ^--- FIXME(53667): Consider whether `Let` can be added to `ident_can_begin_expr`. } fn main() {} diff --git a/src/test/ui/rfc-2497-if-let-chains/feature-gate.stderr b/src/test/ui/rfc-2497-if-let-chains/feature-gate.stderr index 1eabee47c64..bcea8bbaa73 100644 --- a/src/test/ui/rfc-2497-if-let-chains/feature-gate.stderr +++ b/src/test/ui/rfc-2497-if-let-chains/feature-gate.stderr @@ -1,5 +1,17 @@ +error: expected expression, found `let` statement + --> $DIR/feature-gate.rs:50:20 + | +LL | #[cfg(FALSE)] (let 0 = 1); + | ^^^ + +error: expected expression, found `let` statement + --> $DIR/feature-gate.rs:40:17 + | +LL | noop_expr!((let 0 = 1)); + | ^^^ + error: no rules expected the token `let` - --> $DIR/feature-gate.rs:51:15 + --> $DIR/feature-gate.rs:53:15 | LL | macro_rules! use_expr { | --------------------- when calling this macro @@ -62,7 +74,7 @@ LL | while let Range { start: _, end: _ } = (true..true) && false {} = help: add `#![feature(let_chains)]` to the crate attributes to enable error[E0658]: `let` expressions in this position are unstable - --> $DIR/feature-gate.rs:49:20 + --> $DIR/feature-gate.rs:50:20 | LL | #[cfg(FALSE)] (let 0 = 1); | ^^^^^^^^^ @@ -79,6 +91,6 @@ LL | noop_expr!((let 0 = 1)); = 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 9 previous errors +error: aborting due to 11 previous errors For more information about this error, try `rustc --explain E0658`. diff --git a/src/test/ui/rfc-2497-if-let-chains/invalid-let-in-a-valid-let-context.rs b/src/test/ui/rfc-2497-if-let-chains/invalid-let-in-a-valid-let-context.rs new file mode 100644 index 00000000000..6cc53a1935b --- /dev/null +++ b/src/test/ui/rfc-2497-if-let-chains/invalid-let-in-a-valid-let-context.rs @@ -0,0 +1,17 @@ +// check-pass +// known-bug + +#![feature(let_chains)] + +fn main() { + let _opt = Some(1i32); + + #[cfg(FALSE)] + { + if let Some(elem) = _opt && { + [1, 2, 3][let _ = ()]; + true + } { + } + } +} |