Rollup merge of #132828 - est31:let_chains_parsing_tests, r=compiler-errors
Additional tests to ensure let is rejected during parsing In the original stabilization PR, @ `compiler-errors` has [pointed out](https://github.com/rust-lang/rust/pull/94927#issuecomment-1165156328) that #97295 wasn't enough to address the concerns about having `let` in expressions being rejected at parsing time, instead of later. Thankfully, since then the situation has been greatly improved by #115677. This PR adds some additional tests to `disallowed-positions.rs`, and adds two additional revisions to the "normal" case which is now given the `feature` name: * `no_feature`: Added to incorporate `disallowed-positions-without-feature-gate.rs` into the file, reducing duplication. * `nothing`: like feature, but all functions are cfg'd out. Ensures that the errors are really emitted during parsing. cc tracking issue #53667
This commit is contained in:
Jubilee
GitHub
commit
c19d56c902
@ -1,340 +0,0 @@
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// Check that we don't suggest enabling a feature for code that's
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// not accepted even with that feature.
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#![allow(irrefutable_let_patterns)]
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use std::ops::Range;
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fn main() {}
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fn _if() {
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if (let 0 = 1) {}
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//~^ ERROR expected expression, found `let` statement
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if (((let 0 = 1))) {}
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//~^ ERROR expected expression, found `let` statement
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if (let 0 = 1) && true {}
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//~^ ERROR expected expression, found `let` statement
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if true && (let 0 = 1) {}
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//~^ ERROR expected expression, found `let` statement
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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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if (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
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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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}
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fn _while() {
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while (let 0 = 1) {}
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//~^ ERROR expected expression, found `let` statement
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while (((let 0 = 1))) {}
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//~^ ERROR expected expression, found `let` statement
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while (let 0 = 1) && true {}
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//~^ ERROR expected expression, found `let` statement
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while true && (let 0 = 1) {}
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//~^ ERROR expected expression, found `let` statement
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while (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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while (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
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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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}
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fn _macros() {
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macro_rules! use_expr {
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($e:expr) => {
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if $e {}
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while $e {}
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}
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}
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use_expr!((let 0 = 1 && 0 == 0));
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//~^ ERROR expected expression, found `let` statement
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use_expr!((let 0 = 1));
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//~^ ERROR expected expression, found `let` statement
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}
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fn nested_within_if_expr() {
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if &let 0 = 0 {}
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//~^ ERROR expected expression, found `let` statement
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if !let 0 = 0 {}
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//~^ ERROR expected expression, found `let` statement
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if *let 0 = 0 {}
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//~^ ERROR expected expression, found `let` statement
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if -let 0 = 0 {}
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//~^ ERROR expected expression, found `let` statement
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fn _check_try_binds_tighter() -> Result<(), ()> {
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if let 0 = 0? {}
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//~^ ERROR the `?` operator can only be applied to values that implement `Try`
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Ok(())
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}
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if (let 0 = 0)? {}
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//~^ ERROR expected expression, found `let` statement
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if true || let 0 = 0 {}
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//~^ ERROR expected expression, found `let` statement
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if (true || let 0 = 0) {}
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//~^ ERROR expected expression, found `let` statement
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if true && (true || let 0 = 0) {}
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//~^ ERROR expected expression, found `let` statement
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if true || (true && let 0 = 0) {}
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//~^ ERROR expected expression, found `let` statement
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let mut x = true;
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if x = let 0 = 0 {}
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//~^ ERROR expected expression, found `let` statement
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if true..(let 0 = 0) {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR mismatched types
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if ..(let 0 = 0) {}
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//~^ ERROR expected expression, found `let` statement
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if (let 0 = 0).. {}
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//~^ ERROR expected expression, found `let` statement
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// Binds as `(let ... = true)..true &&/|| false`.
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if let Range { start: _, end: _ } = true..true && false {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR mismatched types
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if let Range { start: _, end: _ } = true..true || false {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR mismatched types
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// Binds as `(let Range { start: F, end } = F)..(|| true)`.
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const F: fn() -> bool = || true;
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if let Range { start: F, end } = F..|| true {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR mismatched types
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// Binds as `(let Range { start: true, end } = t)..(&&false)`.
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let t = &&true;
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if let Range { start: true, end } = t..&&false {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR mismatched types
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if let true = let true = true {}
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//~^ ERROR expected expression, found `let` statement
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}
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fn nested_within_while_expr() {
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while &let 0 = 0 {}
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//~^ ERROR expected expression, found `let` statement
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while !let 0 = 0 {}
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//~^ ERROR expected expression, found `let` statement
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while *let 0 = 0 {}
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//~^ ERROR expected expression, found `let` statement
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while -let 0 = 0 {}
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//~^ ERROR expected expression, found `let` statement
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fn _check_try_binds_tighter() -> Result<(), ()> {
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while let 0 = 0? {}
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//~^ ERROR the `?` operator can only be applied to values that implement `Try`
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Ok(())
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}
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while (let 0 = 0)? {}
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//~^ ERROR expected expression, found `let` statement
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while true || let 0 = 0 {}
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//~^ ERROR expected expression, found `let` statement
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while (true || let 0 = 0) {}
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//~^ ERROR expected expression, found `let` statement
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while true && (true || let 0 = 0) {}
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//~^ ERROR expected expression, found `let` statement
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while true || (true && let 0 = 0) {}
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//~^ ERROR expected expression, found `let` statement
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let mut x = true;
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while x = let 0 = 0 {}
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//~^ ERROR expected expression, found `let` statement
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while true..(let 0 = 0) {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR mismatched types
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while ..(let 0 = 0) {}
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//~^ ERROR expected expression, found `let` statement
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while (let 0 = 0).. {}
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//~^ ERROR expected expression, found `let` statement
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// Binds as `(let ... = true)..true &&/|| false`.
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while let Range { start: _, end: _ } = true..true && false {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR mismatched types
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while let Range { start: _, end: _ } = true..true || false {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR mismatched types
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// Binds as `(let Range { start: F, end } = F)..(|| true)`.
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const F: fn() -> bool = || true;
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while let Range { start: F, end } = F..|| true {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR mismatched types
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// Binds as `(let Range { start: true, end } = t)..(&&false)`.
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let t = &&true;
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while let Range { start: true, end } = t..&&false {}
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR mismatched types
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while let true = let true = true {}
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//~^ ERROR expected expression, found `let` statement
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}
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fn not_error_because_clarified_intent() {
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if let Range { start: _, end: _ } = (true..true || false) { }
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if let Range { start: _, end: _ } = (true..true && false) { }
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while let Range { start: _, end: _ } = (true..true || false) { }
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while let Range { start: _, end: _ } = (true..true && false) { }
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}
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fn outside_if_and_while_expr() {
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&let 0 = 0;
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//~^ ERROR expected expression, found `let` statement
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!let 0 = 0;
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//~^ ERROR expected expression, found `let` statement
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*let 0 = 0;
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//~^ ERROR expected expression, found `let` statement
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-let 0 = 0;
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//~^ ERROR expected expression, found `let` statement
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let _ = let _ = 3;
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//~^ ERROR expected expression, found `let` statement
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fn _check_try_binds_tighter() -> Result<(), ()> {
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let 0 = 0?;
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//~^ ERROR the `?` operator can only be applied to values that implement `Try`
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Ok(())
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}
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(let 0 = 0)?;
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//~^ ERROR expected expression, found `let` statement
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true || let 0 = 0;
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//~^ ERROR expected expression, found `let` statement
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(true || let 0 = 0);
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//~^ ERROR expected expression, found `let` statement
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true && (true || let 0 = 0);
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//~^ ERROR expected expression, found `let` statement
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let mut x = true;
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x = let 0 = 0;
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//~^ ERROR expected expression, found `let` statement
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true..(let 0 = 0);
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//~^ ERROR expected expression, found `let` statement
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..(let 0 = 0);
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//~^ ERROR expected expression, found `let` statement
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(let 0 = 0)..;
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//~^ ERROR expected expression, found `let` statement
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(let Range { start: _, end: _ } = true..true || false);
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//~^ ERROR mismatched types
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//~| ERROR expected expression, found `let` statement
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(let true = let true = true);
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//~^ ERROR expected expression, found `let` statement
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//~| ERROR expected expression, found `let` statement
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{
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#[cfg(FALSE)]
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let x = true && let y = 1;
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//~^ ERROR expected expression, found `let` statement
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}
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#[cfg(FALSE)]
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{
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[1, 2, 3][let _ = ()]
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//~^ ERROR expected expression, found `let` statement
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}
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// Check function tail position.
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&let 0 = 0
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//~^ ERROR expected expression, found `let` statement
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}
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// Let's make sure that `let` inside const generic arguments are considered.
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fn inside_const_generic_arguments() {
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struct A<const B: bool>;
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impl<const B: bool> A<{B}> { const O: u32 = 5; }
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if let A::<{
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true && let 1 = 1
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//~^ ERROR expected expression, found `let` statement
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}>::O = 5 {}
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while let A::<{
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true && let 1 = 1
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//~^ ERROR expected expression, found `let` statement
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}>::O = 5 {}
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if A::<{
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true && let 1 = 1
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//~^ ERROR expected expression, found `let` statement
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}>::O == 5 {}
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// In the cases above we have `ExprKind::Block` to help us out.
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// Below however, we would not have a block and so an implementation might go
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// from visiting expressions to types without banning `let` expressions down the tree.
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// This tests ensures that we are not caught by surprise should the parser
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// admit non-IDENT expressions in const generic arguments.
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if A::<
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true && let 1 = 1
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//~^ ERROR expressions must be enclosed in braces
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//~| ERROR expected expression, found `let` statement
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>::O == 5 {}
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}
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fn with_parenthesis() {
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let opt = Some(Some(1i32));
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if (let Some(a) = opt && true) {
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//~^ ERROR expected expression, found `let` statement
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}
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if (let Some(a) = opt) && true {
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//~^ ERROR expected expression, found `let` statement
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}
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if (let Some(a) = opt) && (let Some(b) = a) {
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||||||
//~^ ERROR expected expression, found `let` statement
|
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||||||
//~| ERROR expected expression, found `let` statement
|
|
||||||
}
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||||||
|
|
||||||
if (let Some(a) = opt && (let Some(b) = a)) && b == 1 {
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|
||||||
//~^ ERROR expected expression, found `let` statement
|
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||||||
//~| ERROR expected expression, found `let` statement
|
|
||||||
}
|
|
||||||
if (let Some(a) = opt && (let Some(b) = a)) && true {
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|
||||||
//~^ 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
|
|
||||||
}
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|
||||||
|
|
||||||
#[cfg(FALSE)]
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|
||||||
let x = (true && let y = 1);
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|
||||||
//~^ ERROR expected expression, found `let` statement
|
|
||||||
|
|
||||||
#[cfg(FALSE)]
|
|
||||||
{
|
|
||||||
([1, 2, 3][let _ = ()])
|
|
||||||
//~^ ERROR expected expression, found `let` statement
|
|
||||||
}
|
|
||||||
}
|
|
||||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
@ -0,0 +1,990 @@
|
|||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:33:9
|
||||||
|
|
|
||||||
|
LL | if (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:33:9
|
||||||
|
|
|
||||||
|
LL | if (let 0 = 1) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:36:11
|
||||||
|
|
|
||||||
|
LL | if (((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:36:11
|
||||||
|
|
|
||||||
|
LL | if (((let 0 = 1))) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:39:9
|
||||||
|
|
|
||||||
|
LL | if (let 0 = 1) && 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:39:9
|
||||||
|
|
|
||||||
|
LL | if (let 0 = 1) && true {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:42:17
|
||||||
|
|
|
||||||
|
LL | if true && (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:42:17
|
||||||
|
|
|
||||||
|
LL | if true && (let 0 = 1) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:45:9
|
||||||
|
|
|
||||||
|
LL | if (let 0 = 1) && (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:45:9
|
||||||
|
|
|
||||||
|
LL | if (let 0 = 1) && (let 0 = 1) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:45:24
|
||||||
|
|
|
||||||
|
LL | if (let 0 = 1) && (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:45:24
|
||||||
|
|
|
||||||
|
LL | if (let 0 = 1) && (let 0 = 1) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:49:35
|
||||||
|
|
|
||||||
|
LL | if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= 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:49:35
|
||||||
|
|
|
||||||
|
LL | if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:49:48
|
||||||
|
|
|
||||||
|
LL | if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= 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:49:35
|
||||||
|
|
|
||||||
|
LL | if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:49:61
|
||||||
|
|
|
||||||
|
LL | if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= 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:49:35
|
||||||
|
|
|
||||||
|
LL | if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:59:12
|
||||||
|
|
|
||||||
|
LL | while (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:59:12
|
||||||
|
|
|
||||||
|
LL | while (let 0 = 1) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:62:14
|
||||||
|
|
|
||||||
|
LL | while (((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:62:14
|
||||||
|
|
|
||||||
|
LL | while (((let 0 = 1))) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:65:12
|
||||||
|
|
|
||||||
|
LL | while (let 0 = 1) && 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:65:12
|
||||||
|
|
|
||||||
|
LL | while (let 0 = 1) && true {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:68:20
|
||||||
|
|
|
||||||
|
LL | while true && (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:68:20
|
||||||
|
|
|
||||||
|
LL | while true && (let 0 = 1) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:71:12
|
||||||
|
|
|
||||||
|
LL | while (let 0 = 1) && (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:71:12
|
||||||
|
|
|
||||||
|
LL | while (let 0 = 1) && (let 0 = 1) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:71:27
|
||||||
|
|
|
||||||
|
LL | while (let 0 = 1) && (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:71:27
|
||||||
|
|
|
||||||
|
LL | while (let 0 = 1) && (let 0 = 1) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:75:38
|
||||||
|
|
|
||||||
|
LL | while let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= 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:75:38
|
||||||
|
|
|
||||||
|
LL | while let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:75:51
|
||||||
|
|
|
||||||
|
LL | while let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= 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:75:38
|
||||||
|
|
|
||||||
|
LL | while let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:75:64
|
||||||
|
|
|
||||||
|
LL | while let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= 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:75:38
|
||||||
|
|
|
||||||
|
LL | while let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:99:9
|
||||||
|
|
|
||||||
|
LL | if &let 0 = 0 {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:102:9
|
||||||
|
|
|
||||||
|
LL | if !let 0 = 0 {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:104:9
|
||||||
|
|
|
||||||
|
LL | if *let 0 = 0 {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:106:9
|
||||||
|
|
|
||||||
|
LL | if -let 0 = 0 {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:114:9
|
||||||
|
|
|
||||||
|
LL | if (let 0 = 0)? {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:117:16
|
||||||
|
|
|
||||||
|
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:117:13
|
||||||
|
|
|
||||||
|
LL | if true || let 0 = 0 {}
|
||||||
|
| ^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:119:17
|
||||||
|
|
|
||||||
|
LL | if (true || let 0 = 0) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:121:25
|
||||||
|
|
|
||||||
|
LL | if true && (true || let 0 = 0) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:123:25
|
||||||
|
|
|
||||||
|
LL | if true || (true && let 0 = 0) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:127:12
|
||||||
|
|
|
||||||
|
LL | if x = let 0 = 0 {}
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:130:15
|
||||||
|
|
|
||||||
|
LL | if true..(let 0 = 0) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:133:11
|
||||||
|
|
|
||||||
|
LL | if ..(let 0 = 0) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:135:9
|
||||||
|
|
|
||||||
|
LL | if (let 0 = 0).. {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:139:8
|
||||||
|
|
|
||||||
|
LL | if let Range { start: _, end: _ } = true..true && false {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:142:8
|
||||||
|
|
|
||||||
|
LL | if let Range { start: _, end: _ } = true..true || false {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:148:8
|
||||||
|
|
|
||||||
|
LL | if let Range { start: F, end } = F..|| true {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:154:8
|
||||||
|
|
|
||||||
|
LL | if let Range { start: true, end } = t..&&false {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:158:19
|
||||||
|
|
|
||||||
|
LL | if let true = let true = true {}
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:161:15
|
||||||
|
|
|
||||||
|
LL | if return let 0 = 0 {}
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:164:21
|
||||||
|
|
|
||||||
|
LL | loop { if break let 0 = 0 {} }
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:167:15
|
||||||
|
|
|
||||||
|
LL | if (match let 0 = 0 { _ => { false } }) {}
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:170:9
|
||||||
|
|
|
||||||
|
LL | if (let 0 = 0, false).1 {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:173:9
|
||||||
|
|
|
||||||
|
LL | if (let 0 = 0,) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:177:13
|
||||||
|
|
|
||||||
|
LL | if (let 0 = 0).await {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:181:12
|
||||||
|
|
|
||||||
|
LL | if (|| let 0 = 0) {}
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:184:9
|
||||||
|
|
|
||||||
|
LL | if (let 0 = 0)() {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:190:12
|
||||||
|
|
|
||||||
|
LL | while &let 0 = 0 {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:193:12
|
||||||
|
|
|
||||||
|
LL | while !let 0 = 0 {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:195:12
|
||||||
|
|
|
||||||
|
LL | while *let 0 = 0 {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:197:12
|
||||||
|
|
|
||||||
|
LL | while -let 0 = 0 {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:205:12
|
||||||
|
|
|
||||||
|
LL | while (let 0 = 0)? {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:208:19
|
||||||
|
|
|
||||||
|
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:208:16
|
||||||
|
|
|
||||||
|
LL | while true || let 0 = 0 {}
|
||||||
|
| ^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:210:20
|
||||||
|
|
|
||||||
|
LL | while (true || let 0 = 0) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:212:28
|
||||||
|
|
|
||||||
|
LL | while true && (true || let 0 = 0) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:214:28
|
||||||
|
|
|
||||||
|
LL | while true || (true && let 0 = 0) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:218:15
|
||||||
|
|
|
||||||
|
LL | while x = let 0 = 0 {}
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:221:18
|
||||||
|
|
|
||||||
|
LL | while true..(let 0 = 0) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:224:14
|
||||||
|
|
|
||||||
|
LL | while ..(let 0 = 0) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:226:12
|
||||||
|
|
|
||||||
|
LL | while (let 0 = 0).. {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:230:11
|
||||||
|
|
|
||||||
|
LL | while let Range { start: _, end: _ } = true..true && false {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:233:11
|
||||||
|
|
|
||||||
|
LL | while let Range { start: _, end: _ } = true..true || false {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:239:11
|
||||||
|
|
|
||||||
|
LL | while let Range { start: F, end } = F..|| true {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:245:11
|
||||||
|
|
|
||||||
|
LL | while let Range { start: true, end } = t..&&false {}
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:249:22
|
||||||
|
|
|
||||||
|
LL | while let true = let true = true {}
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:252:18
|
||||||
|
|
|
||||||
|
LL | while return let 0 = 0 {}
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:255:39
|
||||||
|
|
|
||||||
|
LL | 'outer: loop { while break 'outer let 0 = 0 {} }
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:258:18
|
||||||
|
|
|
||||||
|
LL | while (match let 0 = 0 { _ => { false } }) {}
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:261:12
|
||||||
|
|
|
||||||
|
LL | while (let 0 = 0, false).1 {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:264:12
|
||||||
|
|
|
||||||
|
LL | while (let 0 = 0,) {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:268:16
|
||||||
|
|
|
||||||
|
LL | while (let 0 = 0).await {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:272:15
|
||||||
|
|
|
||||||
|
LL | while (|| let 0 = 0) {}
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:275:12
|
||||||
|
|
|
||||||
|
LL | while (let 0 = 0)() {}
|
||||||
|
| ^^^^^^^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:292:6
|
||||||
|
|
|
||||||
|
LL | &let 0 = 0;
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:295:6
|
||||||
|
|
|
||||||
|
LL | !let 0 = 0;
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:297:6
|
||||||
|
|
|
||||||
|
LL | *let 0 = 0;
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:299:6
|
||||||
|
|
|
||||||
|
LL | -let 0 = 0;
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:301:13
|
||||||
|
|
|
||||||
|
LL | let _ = let _ = 3;
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:309:6
|
||||||
|
|
|
||||||
|
LL | (let 0 = 0)?;
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:312:13
|
||||||
|
|
|
||||||
|
LL | true || let 0 = 0;
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:314:14
|
||||||
|
|
|
||||||
|
LL | (true || let 0 = 0);
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:316:22
|
||||||
|
|
|
||||||
|
LL | true && (true || let 0 = 0);
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:320:9
|
||||||
|
|
|
||||||
|
LL | x = let 0 = 0;
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:323:12
|
||||||
|
|
|
||||||
|
LL | true..(let 0 = 0);
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:325:8
|
||||||
|
|
|
||||||
|
LL | ..(let 0 = 0);
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:327:6
|
||||||
|
|
|
||||||
|
LL | (let 0 = 0)..;
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:330:6
|
||||||
|
|
|
||||||
|
LL | (let Range { start: _, end: _ } = true..true || false);
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:334:6
|
||||||
|
|
|
||||||
|
LL | (let true = let true = true);
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:334:17
|
||||||
|
|
|
||||||
|
LL | (let true = let true = true);
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:340:25
|
||||||
|
|
|
||||||
|
LL | let x = true && let y = 1;
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:346:19
|
||||||
|
|
|
||||||
|
LL | [1, 2, 3][let _ = ()]
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:351:6
|
||||||
|
|
|
||||||
|
LL | &let 0 = 0
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:362:17
|
||||||
|
|
|
||||||
|
LL | true && let 1 = 1
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:367:17
|
||||||
|
|
|
||||||
|
LL | true && let 1 = 1
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:372:17
|
||||||
|
|
|
||||||
|
LL | true && let 1 = 1
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:383:17
|
||||||
|
|
|
||||||
|
LL | true && let 1 = 1
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expressions must be enclosed in braces to be used as const generic arguments
|
||||||
|
--> $DIR/disallowed-positions.rs:383:9
|
||||||
|
|
|
||||||
|
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.rs:393:9
|
||||||
|
|
|
||||||
|
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:393:9
|
||||||
|
|
|
||||||
|
LL | if (let Some(a) = opt && true) {
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:397:9
|
||||||
|
|
|
||||||
|
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:397:9
|
||||||
|
|
|
||||||
|
LL | if (let Some(a) = opt) && true {
|
||||||
|
| ^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:400:9
|
||||||
|
|
|
||||||
|
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:400:9
|
||||||
|
|
|
||||||
|
LL | if (let Some(a) = opt) && (let Some(b) = a) {
|
||||||
|
| ^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:400:32
|
||||||
|
|
|
||||||
|
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:400:32
|
||||||
|
|
|
||||||
|
LL | if (let Some(a) = opt) && (let Some(b) = a) {
|
||||||
|
| ^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:408:9
|
||||||
|
|
|
||||||
|
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:408:9
|
||||||
|
|
|
||||||
|
LL | if (let Some(a) = opt && (let Some(b) = a)) && b == 1 {
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:408:31
|
||||||
|
|
|
||||||
|
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:408:31
|
||||||
|
|
|
||||||
|
LL | if (let Some(a) = opt && (let Some(b) = a)) && b == 1 {
|
||||||
|
| ^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:412:9
|
||||||
|
|
|
||||||
|
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:412:9
|
||||||
|
|
|
||||||
|
LL | if (let Some(a) = opt && (let Some(b) = a)) && true {
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:412:31
|
||||||
|
|
|
||||||
|
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:412:31
|
||||||
|
|
|
||||||
|
LL | if (let Some(a) = opt && (let Some(b) = a)) && true {
|
||||||
|
| ^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:416:9
|
||||||
|
|
|
||||||
|
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:416:9
|
||||||
|
|
|
||||||
|
LL | if (let Some(a) = opt && (true)) && true {
|
||||||
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:436:22
|
||||||
|
|
|
||||||
|
LL | let x = (true && let y = 1);
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: expected expression, found `let` statement
|
||||||
|
--> $DIR/disallowed-positions.rs:441:20
|
||||||
|
|
|
||||||
|
LL | ([1, 2, 3][let _ = ()])
|
||||||
|
| ^^^
|
||||||
|
|
|
||||||
|
= note: only supported directly in conditions of `if` and `while` expressions
|
||||||
|
|
||||||
|
error: aborting due to 105 previous errors
|
||||||
|
|
||||||
@ -1,3 +1,5 @@
|
|||||||
|
//@ revisions: no_feature feature nothing
|
||||||
|
//@ edition: 2021
|
||||||
// Here we test that `lowering` behaves correctly wrt. `let $pats = $expr` expressions.
|
// Here we test that `lowering` behaves correctly wrt. `let $pats = $expr` expressions.
|
||||||
//
|
//
|
||||||
// We want to make sure that `let` is banned in situations other than:
|
// We want to make sure that `let` is banned in situations other than:
|
||||||
@ -17,7 +19,8 @@
|
|||||||
//
|
//
|
||||||
// To that end, we check some positions which is not part of the language above.
|
// To that end, we check some positions which is not part of the language above.
|
||||||
|
|
||||||
#![feature(let_chains)] // Avoid inflating `.stderr` with overzealous gates in this test.
|
// Avoid inflating `.stderr` with overzealous gates (or test what happens if you disable the gate)
|
||||||
|
#![cfg_attr(not(no_feature), feature(let_chains))]
|
||||||
|
|
||||||
#![allow(irrefutable_let_patterns)]
|
#![allow(irrefutable_let_patterns)]
|
||||||
|
|
||||||
@ -25,6 +28,7 @@
|
|||||||
|
|
||||||
fn main() {}
|
fn main() {}
|
||||||
|
|
||||||
|
#[cfg(not(nothing))]
|
||||||
fn _if() {
|
fn _if() {
|
||||||
if (let 0 = 1) {}
|
if (let 0 = 1) {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
@ -46,8 +50,11 @@ fn _if() {
|
|||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
//~| ERROR expected expression, found `let` statement
|
//~| ERROR expected expression, found `let` statement
|
||||||
//~| ERROR expected expression, found `let` statement
|
//~| ERROR expected expression, found `let` statement
|
||||||
|
//[no_feature]~| ERROR `let` expressions in this position are unstable
|
||||||
|
//[no_feature]~| ERROR `let` expressions in this position are unstable
|
||||||
}
|
}
|
||||||
|
|
||||||
|
#[cfg(not(nothing))]
|
||||||
fn _while() {
|
fn _while() {
|
||||||
while (let 0 = 1) {}
|
while (let 0 = 1) {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
@ -69,8 +76,11 @@ fn _while() {
|
|||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
//~| ERROR expected expression, found `let` statement
|
//~| ERROR expected expression, found `let` statement
|
||||||
//~| ERROR expected expression, found `let` statement
|
//~| ERROR expected expression, found `let` statement
|
||||||
|
//[no_feature]~| ERROR `let` expressions in this position are unstable
|
||||||
|
//[no_feature]~| ERROR `let` expressions in this position are unstable
|
||||||
}
|
}
|
||||||
|
|
||||||
|
#[cfg(not(nothing))]
|
||||||
fn _macros() {
|
fn _macros() {
|
||||||
macro_rules! use_expr {
|
macro_rules! use_expr {
|
||||||
($e:expr) => {
|
($e:expr) => {
|
||||||
@ -79,11 +89,12 @@ macro_rules! use_expr {
|
|||||||
}
|
}
|
||||||
}
|
}
|
||||||
use_expr!((let 0 = 1 && 0 == 0));
|
use_expr!((let 0 = 1 && 0 == 0));
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//[feature,no_feature]~^ ERROR expected expression, found `let` statement
|
||||||
use_expr!((let 0 = 1));
|
use_expr!((let 0 = 1));
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//[feature,no_feature]~^ ERROR expected expression, found `let` statement
|
||||||
}
|
}
|
||||||
|
|
||||||
|
#[cfg(not(nothing))]
|
||||||
fn nested_within_if_expr() {
|
fn nested_within_if_expr() {
|
||||||
if &let 0 = 0 {}
|
if &let 0 = 0 {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
@ -97,7 +108,7 @@ fn nested_within_if_expr() {
|
|||||||
|
|
||||||
fn _check_try_binds_tighter() -> Result<(), ()> {
|
fn _check_try_binds_tighter() -> Result<(), ()> {
|
||||||
if let 0 = 0? {}
|
if let 0 = 0? {}
|
||||||
//~^ ERROR the `?` operator can only be applied to values that implement `Try`
|
//[feature,no_feature]~^ ERROR the `?` operator can only be applied to values that implement `Try`
|
||||||
Ok(())
|
Ok(())
|
||||||
}
|
}
|
||||||
if (let 0 = 0)? {}
|
if (let 0 = 0)? {}
|
||||||
@ -118,7 +129,7 @@ fn _check_try_binds_tighter() -> Result<(), ()> {
|
|||||||
|
|
||||||
if true..(let 0 = 0) {}
|
if true..(let 0 = 0) {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
//~| ERROR mismatched types
|
//[feature,no_feature]~| ERROR mismatched types
|
||||||
if ..(let 0 = 0) {}
|
if ..(let 0 = 0) {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
if (let 0 = 0).. {}
|
if (let 0 = 0).. {}
|
||||||
@ -127,27 +138,54 @@ fn _check_try_binds_tighter() -> Result<(), ()> {
|
|||||||
// Binds as `(let ... = true)..true &&/|| false`.
|
// Binds as `(let ... = true)..true &&/|| false`.
|
||||||
if let Range { start: _, end: _ } = true..true && false {}
|
if let Range { start: _, end: _ } = true..true && false {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
//~| ERROR mismatched types
|
//[feature,no_feature]~| ERROR mismatched types
|
||||||
if let Range { start: _, end: _ } = true..true || false {}
|
if let Range { start: _, end: _ } = true..true || false {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
//~| ERROR mismatched types
|
//[feature,no_feature]~| ERROR mismatched types
|
||||||
|
|
||||||
// Binds as `(let Range { start: F, end } = F)..(|| true)`.
|
// Binds as `(let Range { start: F, end } = F)..(|| true)`.
|
||||||
const F: fn() -> bool = || true;
|
const F: fn() -> bool = || true;
|
||||||
if let Range { start: F, end } = F..|| true {}
|
if let Range { start: F, end } = F..|| true {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
//~| ERROR mismatched types
|
//[feature,no_feature]~| ERROR mismatched types
|
||||||
|
|
||||||
// Binds as `(let Range { start: true, end } = t)..(&&false)`.
|
// Binds as `(let Range { start: true, end } = t)..(&&false)`.
|
||||||
let t = &&true;
|
let t = &&true;
|
||||||
if let Range { start: true, end } = t..&&false {}
|
if let Range { start: true, end } = t..&&false {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
//~| ERROR mismatched types
|
//[feature,no_feature]~| ERROR mismatched types
|
||||||
|
|
||||||
if let true = let true = true {}
|
if let true = let true = true {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
|
if return let 0 = 0 {}
|
||||||
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
|
loop { if break let 0 = 0 {} }
|
||||||
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
|
if (match let 0 = 0 { _ => { false } }) {}
|
||||||
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
|
if (let 0 = 0, false).1 {}
|
||||||
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
|
if (let 0 = 0,) {}
|
||||||
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
|
async fn foo() {
|
||||||
|
if (let 0 = 0).await {}
|
||||||
|
//~^ 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
|
||||||
}
|
}
|
||||||
|
|
||||||
|
#[cfg(not(nothing))]
|
||||||
fn nested_within_while_expr() {
|
fn nested_within_while_expr() {
|
||||||
while &let 0 = 0 {}
|
while &let 0 = 0 {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
@ -161,7 +199,7 @@ fn nested_within_while_expr() {
|
|||||||
|
|
||||||
fn _check_try_binds_tighter() -> Result<(), ()> {
|
fn _check_try_binds_tighter() -> Result<(), ()> {
|
||||||
while let 0 = 0? {}
|
while let 0 = 0? {}
|
||||||
//~^ ERROR the `?` operator can only be applied to values that implement `Try`
|
//[feature,no_feature]~^ ERROR the `?` operator can only be applied to values that implement `Try`
|
||||||
Ok(())
|
Ok(())
|
||||||
}
|
}
|
||||||
while (let 0 = 0)? {}
|
while (let 0 = 0)? {}
|
||||||
@ -182,7 +220,7 @@ fn _check_try_binds_tighter() -> Result<(), ()> {
|
|||||||
|
|
||||||
while true..(let 0 = 0) {}
|
while true..(let 0 = 0) {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
//~| ERROR mismatched types
|
//[feature,no_feature]~| ERROR mismatched types
|
||||||
while ..(let 0 = 0) {}
|
while ..(let 0 = 0) {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
while (let 0 = 0).. {}
|
while (let 0 = 0).. {}
|
||||||
@ -191,27 +229,54 @@ fn _check_try_binds_tighter() -> Result<(), ()> {
|
|||||||
// Binds as `(let ... = true)..true &&/|| false`.
|
// Binds as `(let ... = true)..true &&/|| false`.
|
||||||
while let Range { start: _, end: _ } = true..true && false {}
|
while let Range { start: _, end: _ } = true..true && false {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
//~| ERROR mismatched types
|
//[feature,no_feature]~| ERROR mismatched types
|
||||||
while let Range { start: _, end: _ } = true..true || false {}
|
while let Range { start: _, end: _ } = true..true || false {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
//~| ERROR mismatched types
|
//[feature,no_feature]~| ERROR mismatched types
|
||||||
|
|
||||||
// Binds as `(let Range { start: F, end } = F)..(|| true)`.
|
// Binds as `(let Range { start: F, end } = F)..(|| true)`.
|
||||||
const F: fn() -> bool = || true;
|
const F: fn() -> bool = || true;
|
||||||
while let Range { start: F, end } = F..|| true {}
|
while let Range { start: F, end } = F..|| true {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
//~| ERROR mismatched types
|
//[feature,no_feature]~| ERROR mismatched types
|
||||||
|
|
||||||
// Binds as `(let Range { start: true, end } = t)..(&&false)`.
|
// Binds as `(let Range { start: true, end } = t)..(&&false)`.
|
||||||
let t = &&true;
|
let t = &&true;
|
||||||
while let Range { start: true, end } = t..&&false {}
|
while let Range { start: true, end } = t..&&false {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
//~| ERROR mismatched types
|
//[feature,no_feature]~| ERROR mismatched types
|
||||||
|
|
||||||
while let true = let true = true {}
|
while let true = let true = true {}
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
|
while return let 0 = 0 {}
|
||||||
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
|
'outer: loop { while break 'outer let 0 = 0 {} }
|
||||||
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
|
while (match let 0 = 0 { _ => { false } }) {}
|
||||||
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
|
while (let 0 = 0, false).1 {}
|
||||||
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
|
while (let 0 = 0,) {}
|
||||||
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
|
async fn foo() {
|
||||||
|
while (let 0 = 0).await {}
|
||||||
|
//~^ 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
|
||||||
}
|
}
|
||||||
|
|
||||||
|
#[cfg(not(nothing))]
|
||||||
fn not_error_because_clarified_intent() {
|
fn not_error_because_clarified_intent() {
|
||||||
if let Range { start: _, end: _ } = (true..true || false) { }
|
if let Range { start: _, end: _ } = (true..true || false) { }
|
||||||
|
|
||||||
@ -222,6 +287,7 @@ fn not_error_because_clarified_intent() {
|
|||||||
while let Range { start: _, end: _ } = (true..true && false) { }
|
while let Range { start: _, end: _ } = (true..true && false) { }
|
||||||
}
|
}
|
||||||
|
|
||||||
|
#[cfg(not(nothing))]
|
||||||
fn outside_if_and_while_expr() {
|
fn outside_if_and_while_expr() {
|
||||||
&let 0 = 0;
|
&let 0 = 0;
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
@ -232,10 +298,12 @@ fn outside_if_and_while_expr() {
|
|||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
-let 0 = 0;
|
-let 0 = 0;
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
let _ = let _ = 3;
|
||||||
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
fn _check_try_binds_tighter() -> Result<(), ()> {
|
fn _check_try_binds_tighter() -> Result<(), ()> {
|
||||||
let 0 = 0?;
|
let 0 = 0?;
|
||||||
//~^ ERROR the `?` operator can only be applied to values that implement `Try`
|
//[feature,no_feature]~^ ERROR the `?` operator can only be applied to values that implement `Try`
|
||||||
Ok(())
|
Ok(())
|
||||||
}
|
}
|
||||||
(let 0 = 0)?;
|
(let 0 = 0)?;
|
||||||
@ -260,8 +328,8 @@ fn _check_try_binds_tighter() -> Result<(), ()> {
|
|||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
|
|
||||||
(let Range { start: _, end: _ } = true..true || false);
|
(let Range { start: _, end: _ } = true..true || false);
|
||||||
//~^ ERROR mismatched types
|
//~^ ERROR expected expression, found `let` statement
|
||||||
//~| ERROR expected expression, found `let` statement
|
//[feature,no_feature]~| ERROR mismatched types
|
||||||
|
|
||||||
(let true = let true = true);
|
(let true = let true = true);
|
||||||
//~^ ERROR expected expression, found `let` statement
|
//~^ ERROR expected expression, found `let` statement
|
||||||
@ -285,6 +353,7 @@ fn _check_try_binds_tighter() -> Result<(), ()> {
|
|||||||
}
|
}
|
||||||
|
|
||||||
// Let's make sure that `let` inside const generic arguments are considered.
|
// Let's make sure that `let` inside const generic arguments are considered.
|
||||||
|
#[cfg(not(nothing))]
|
||||||
fn inside_const_generic_arguments() {
|
fn inside_const_generic_arguments() {
|
||||||
struct A<const B: bool>;
|
struct A<const B: bool>;
|
||||||
impl<const B: bool> A<{B}> { const O: u32 = 5; }
|
impl<const B: bool> A<{B}> { const O: u32 = 5; }
|
||||||
@ -317,6 +386,7 @@ fn inside_const_generic_arguments() {
|
|||||||
>::O == 5 {}
|
>::O == 5 {}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
#[cfg(not(nothing))]
|
||||||
fn with_parenthesis() {
|
fn with_parenthesis() {
|
||||||
let opt = Some(Some(1i32));
|
let opt = Some(Some(1i32));
|
||||||
|
|
||||||
@ -332,6 +402,7 @@ fn with_parenthesis() {
|
|||||||
//~| ERROR expected expression, found `let` statement
|
//~| ERROR expected expression, found `let` statement
|
||||||
}
|
}
|
||||||
if let Some(a) = opt && (true && true) {
|
if let Some(a) = opt && (true && true) {
|
||||||
|
//[no_feature]~^ ERROR `let` expressions in this position are unstable
|
||||||
}
|
}
|
||||||
|
|
||||||
if (let Some(a) = opt && (let Some(b) = a)) && b == 1 {
|
if (let Some(a) = opt && (let Some(b) = a)) && b == 1 {
|
||||||
@ -347,14 +418,18 @@ fn with_parenthesis() {
|
|||||||
}
|
}
|
||||||
|
|
||||||
if (true && (true)) && let Some(a) = opt {
|
if (true && (true)) && let Some(a) = opt {
|
||||||
|
//[no_feature]~^ ERROR `let` expressions in this position are unstable
|
||||||
}
|
}
|
||||||
if (true) && let Some(a) = opt {
|
if (true) && let Some(a) = opt {
|
||||||
|
//[no_feature]~^ ERROR `let` expressions in this position are unstable
|
||||||
}
|
}
|
||||||
if true && let Some(a) = opt {
|
if true && let Some(a) = opt {
|
||||||
|
//[no_feature]~^ ERROR `let` expressions in this position are unstable
|
||||||
}
|
}
|
||||||
|
|
||||||
let fun = || true;
|
let fun = || true;
|
||||||
if let true = (true && fun()) && (true) {
|
if let true = (true && fun()) && (true) {
|
||||||
|
//[no_feature]~^ ERROR `let` expressions in this position are unstable
|
||||||
}
|
}
|
||||||
|
|
||||||
#[cfg(FALSE)]
|
#[cfg(FALSE)]
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user