49ed25b5d2
Notes about tests: - tests/ui/rfcs/rfc-2294-if-let-guard/feature-gate.rs: some messages are now duplicated due to repeated parsing. - tests/ui/rfcs/rfc-2497-if-let-chains/disallowed-positions.rs: ditto. - `tests/ui/proc-macro/macro-rules-derive-cfg.rs`: the diff looks large but the only difference is the insertion of a single invisible-delimited group around a metavar. - `tests/ui/attributes/nonterminal-expansion.rs`: a slight span degradation, somehow related to the recent massive attr parsing rewrite (#135726). I couldn't work out exactly what is going wrong, but I don't think it's worth holding things up for a single slightly suboptimal error message.
77 lines
2.4 KiB
Rust
77 lines
2.4 KiB
Rust
// gate-test-if_let_guard
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use std::ops::Range;
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fn _if_let_guard() {
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match () {
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() if let 0 = 1 => {}
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//~^ ERROR `if let` guards are experimental
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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 true && let 0 = 1 => {}
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//~^ ERROR `if let` guards are experimental
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//~| ERROR `let` expressions in this position are unstable
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() if let 0 = 1 && true => {}
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//~^ ERROR `if let` guards are experimental
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//~| ERROR `let` expressions in this position are unstable
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() 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 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
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//~^ ERROR `if let` guards are experimental
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//~| ERROR `let` expressions in this position are unstable
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//~| ERROR `let` expressions in this position are unstable
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//~| ERROR 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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() if let Range { start: _, end: _ } = (true..true) && false => {}
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//~^ ERROR `if let` guards are experimental
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//~| ERROR `let` expressions in this position are unstable
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_ => {}
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}
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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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match () {
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() if $e => {}
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_ => {}
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}
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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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//~| 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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//~| ERROR expected expression, found `let` statement
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match () {
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#[cfg(FALSE)]
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() if let 0 = 1 => {}
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//~^ ERROR `if let` guards are experimental
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_ => {}
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}
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use_expr!(let 0 = 1);
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//~^ ERROR no rules expected keyword `let`
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}
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fn main() {}
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