Created
November 9, 2012 16:33
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Exception handling
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| extern mod std; | |
| extern mod docopt; | |
| use send_map::linear::LinearMap; | |
| use io::{ReaderUtil, WriterUtil}; | |
| /// Reads whole stream and outputs it as string | |
| fn read_whole_stream_to_str(input_stream: io::Reader) -> ~str { | |
| let mut buf = ~[]; | |
| loop { | |
| let ch = input_stream.read_byte(); | |
| if input_stream.eof() { break; } | |
| buf.push(ch as u8); | |
| } | |
| str::from_bytes(buf) | |
| } | |
| fn main () { | |
| let input_stream = io::stdin(); | |
| // let doc: ~str = read_whole_stream_to_str(input_stream); | |
| let doc = ~"some fancy docstring"; | |
| let docopt_result: Result<~LinearMap<~str, ~str>, ()> = do task::try { | |
| let options = docopt::docopt(copy doc); | |
| move options | |
| }; | |
| match docopt_result { | |
| Ok(options) => io::println( | |
| fmt!("%?", options)), | |
| Err(options) => io::println(fmt!("%?", options.to_str())) | |
| } | |
| /** | |
| * I get this: | |
| * | |
| ~{ k0: 4644902254958875435, k1: 16078254338373962874, resize_at: 24, size: 1, buckets: | |
| ~[ None, Some({ hash: 7004769276290571297, key: ~"some fancy string", value: ~"some fancy string" }), | |
| None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, | |
| None, None, None, None, None, None, None, None, None, None, None, None, None, None ] } | |
| */ | |
| } |
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