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https://github.com/haraldh/chainerror.git
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35 lines
522 B
Rust
35 lines
522 B
Rust
/*!
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~~~bash
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$ cargo run -q --example tutorial1
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Error: StringError("func1 error")
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~~~
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!*/
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use std::error::Error;
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use std::result::Result;
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fn do_some_io() -> Result<(), Box<Error>> {
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Err("do_some_io error")?;
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Ok(())
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}
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fn func2() -> Result<(), Box<Error>> {
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if let Err(_) = do_some_io() {
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Err("func2 error")?;
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}
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Ok(())
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}
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fn func1() -> Result<(), Box<Error>> {
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if let Err(_) = func2() {
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Err("func1 error")?;
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}
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Ok(())
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}
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fn main() -> Result<(), Box<Error>> {
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func1()
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}
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