30 lines
506 B
Rust
30 lines
506 B
Rust
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#[macro_use(defer)]
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extern crate scopeguard;
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use scopeguard::guard;
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fn f() {
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defer! {
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println!("Called at return or panic");
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}
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panic!();
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}
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use std::fs::File;
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use std::io::Write;
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fn g() {
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let f = File::create("newfile.txt").unwrap();
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let mut file = guard(f, |f| {
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// write file at return or panic
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let _ = f.sync_all();
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});
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// access the file through the scope guard itself
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file.write_all(b"test me\n").unwrap();
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}
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fn main() {
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f();
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g();
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}
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