18 lines
793 B
Rust
18 lines
793 B
Rust
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// Check error for missing writer in writeln! and write! macro
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fn main() {
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let x = 1;
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let y = 2;
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write!("{}_{}", x, y);
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//~^ ERROR format argument must be a string literal
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//~| HELP you might be missing a string literal to format with
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//~| ERROR cannot write into `&'static str`
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//~| NOTE must implement `io::Write`, `fmt::Write`, or have a `write_fmt` method
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//~| HELP a writer is needed before this format string
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writeln!("{}_{}", x, y);
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//~^ ERROR format argument must be a string literal
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//~| HELP you might be missing a string literal to format with
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//~| ERROR cannot write into `&'static str`
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//~| NOTE must implement `io::Write`, `fmt::Write`, or have a `write_fmt` method
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//~| HELP a writer is needed before this format string
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}
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