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| $ cargo build | |
| Compiling phfoo v0.1.0 (file:///home/clint/src/rustplay/phf/phfoo) | |
| error[E0463]: can't find crate for `phf_macros` | |
| --> src/main.rs:2:11 | |
| | | |
| 2 | #![plugin(phf_macros)] | |
| | ^^^^^^^^^^ can't find crate | |
| error: aborting due to previous error | |
| error: Could not compile `phfoo`. | |
| To learn more, run the command again with --verbose. |
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| #![feature(plugin)] | |
| #![plugin(phf_macros)] | |
| extern crate phf; | |
| #[derive(Clone)] | |
| pub enum Keyword { | |
| Loop, | |
| Continue, | |
| Break, | |
| Fn, | |
| Extern, | |
| } | |
| static KEYWORDS: phf::Map<&'static str, Keyword> = phf_map! { | |
| "loop" => Keyword::Loop, | |
| "continue" => Keyword::Continue, | |
| "break" => Keyword::Break, | |
| "fn" => Keyword::Fn, | |
| "extern" => Keyword::Extern, | |
| }; | |
| pub fn parse_keyword(keyword: &str) -> Option<Keyword> { | |
| KEYWORDS.get(keyword).cloned() | |
| } | |
| fn main() { | |
| match KEYWORDS.get("loop") { | |
| Keyword::Loop => println!("The cow says loop"), | |
| _ => println!("The cow has mad cow disease"), | |
| } | |
| } |
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