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// see https://github.com/rust-lang/rust/issues/138585
#![allow(break_with_label_and_loop)] // doesn't work locally
fn main() {
loop 'a: {}
//~^ ERROR: block label not supported here
//~| HELP: if you meant to label the loop, move this label before the loop
while false 'a: {}
//~^ ERROR: block label not supported here
//~| HELP: if you meant to label the loop, move this label before the loop
for i in [0] 'a: {}
//~^ ERROR: block label not supported here
//~| HELP: if you meant to label the loop, move this label before the loop
'a: loop {
// first block is parsed as the break expr's value with or without parens
while break 'a 'b: {} 'c: {}
//~^ ERROR: block label not supported here
//~| HELP: if you meant to label the loop, move this label before the loop
while break 'a ('b: {}) 'c: {}
//~^ ERROR: block label not supported here
//~| HELP: if you meant to label the loop, move this label before the loop
// without the parens, the first block is parsed as the while-loop's body
// (see the 'no errors' section)
// #[allow(break_with_label_and_loop)] (doesn't work locally)
while (break 'a {}) 'c: {}
//~^ ERROR: block label not supported here
//~| HELP: if you meant to label the loop, move this label before the loop
}
// do not suggest moving the label if there is already a label on the loop
'a: loop 'b: {}
//~^ ERROR: block label not supported here
//~| HELP: remove this block label
'a: while false 'b: {}
//~^ ERROR: block label not supported here
//~| HELP: remove this block label
'a: for i in [0] 'b: {}
//~^ ERROR: block label not supported here
//~| HELP: remove this block label
'a: loop {
// first block is parsed as the break expr's value with or without parens
'd: while break 'a 'b: {} 'c: {}
//~^ ERROR: block label not supported here
//~| HELP: remove this block label
'd: while break 'a ('b: {}) 'c: {}
//~^ ERROR: block label not supported here
//~| HELP: remove this block label
// without the parens, the first block is parsed as the while-loop's body
// (see the 'no errors' section)
// #[allow(break_with_label_and_loop)] (doesn't work locally)
'd: while (break 'a {}) 'c: {}
//~^ ERROR: block label not supported here
//~| HELP: remove this block label
}
// no errors
loop { 'a: {} }
'a: loop { 'b: {} }
while false { 'a: {} }
'a: while false { 'b: {} }
for i in [0] { 'a: {} }
'a: for i in [0] { 'b: {} }
'a: {}
'a: { 'b: {} }
'a: loop {
// first block is parsed as the break expr's value if it is a labeled block
while break 'a 'b: {} {}
'd: while break 'a 'b: {} {}
while break 'a ('b: {}) {}
'd: while break 'a ('b: {}) {}
// first block is parsed as the while-loop's body if it has no label
// (the break expr is parsed as having no value),
// so the second block is a normal stmt-block, and the label is allowed
while break 'a {} 'c: {}
while break 'a {} {}
'd: while break 'a {} 'c: {}
'd: while break 'a {} {}
}
// unrelated errors that should not be affected
'a: 'b: {}
//~^ ERROR: expected `while`, `for`, `loop` or `{` after a label
//~| HELP: consider removing the label
loop { while break 'b: {} {} }
//~^ ERROR: parentheses are required around this expression to avoid confusion with a labeled break expression
//~| HELP: wrap the expression in parentheses
//~| ERROR: `break` or `continue` with no label in the condition of a `while` loop [E0590]
}
|
