diff options
Diffstat (limited to 'meap/meap-code/ch3/globalerror/src')
-rw-r--r-- | meap/meap-code/ch3/globalerror/src/main.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/meap/meap-code/ch3/globalerror/src/main.rs b/meap/meap-code/ch3/globalerror/src/main.rs new file mode 100644 index 0000000..c3db4cb --- /dev/null +++ b/meap/meap-code/ch3/globalerror/src/main.rs @@ -0,0 +1,30 @@ +extern crate rand; +use ::rand::Rng; + +static mut ERROR: isize = 0; + +struct File; + +#[allow(unused_variables)] +fn read(f: &File, save_to: Vec<u8>) -> usize { + if rand::thread_rng().gen_weighted_bool(10_000) { + unsafe { + ERROR = 1; + } + } + + 0 // <> Always read() 0 bytes +} + +#[allow(unused_mut)] +fn main() { + let mut f = File; + let mut buffer = vec![]; + + read(&f, buffer); + unsafe { + if ERROR != 0 { + panic!("An error has occurred!") + } + } +}
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