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