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|
// gate-test-if_let_guard
use std::ops::Range;
fn _if_let_guard() {
match () {
() if let 0 = 1 => {}
//~^ ERROR `if let` guards are experimental
() if (let 0 = 1) => {}
//~^ ERROR `let` expressions in this position are unstable
//~| ERROR expected expression, found `let` statement
() if (((let 0 = 1))) => {}
//~^ ERROR `let` expressions in this position are unstable
//~| ERROR expected expression, found `let` statement
() if true && let 0 = 1 => {}
//~^ ERROR `if let` guards are experimental
//~| ERROR `let` expressions in this position are unstable
() if let 0 = 1 && true => {}
//~^ ERROR `if let` guards are experimental
//~| ERROR `let` expressions in this position are unstable
() if (let 0 = 1) && true => {}
//~^ ERROR `let` expressions in this position are unstable
//~| ERROR expected expression, found `let` statement
() if true && (let 0 = 1) => {}
//~^ ERROR `let` expressions in this position are unstable
//~| ERROR expected expression, found `let` statement
() if (let 0 = 1) && (let 0 = 1) => {}
//~^ ERROR `let` expressions in this position are unstable
//~| ERROR `let` expressions in this position are unstable
//~| ERROR expected expression, found `let` statement
//~| ERROR expected expression, found `let` statement
() if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
//~^ ERROR `if let` guards are experimental
//~| ERROR `let` expressions in this position are unstable
//~| ERROR `let` expressions in this position are unstable
//~| ERROR `let` expressions in this position are unstable
//~| ERROR `let` expressions in this position are unstable
//~| ERROR `let` expressions in this position are unstable
//~| ERROR expected expression, found `let` statement
//~| ERROR expected expression, found `let` statement
//~| ERROR expected expression, found `let` statement
() if let Range { start: _, end: _ } = (true..true) && false => {}
//~^ ERROR `if let` guards are experimental
//~| ERROR `let` expressions in this position are unstable
_ => {}
}
}
fn _macros() {
macro_rules! use_expr {
($e:expr) => {
match () {
() if $e => {}
_ => {}
}
}
}
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 => {}
//~^ ERROR `if let` guards are experimental
_ => {}
}
use_expr!(let 0 = 1);
//~^ ERROR no rules expected the token `let`
}
fn main() {}
|
