29 lines
709 B
Rust
29 lines
709 B
Rust
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#[macro_use]
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extern crate pest_derive;
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extern crate pest;
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use pest::Parser;
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#[derive(Parser)]
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#[grammar = "../examples/help-menu.pest"]
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struct HelpMenuGrammar;
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const INPUT: &str = r"cli help
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cli positional-command <required-single-argument> [optional-single-argument]
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cli [choice | of | one | or | none | of | these | options]
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cli <choice | of | one | of | these | options>
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cli [nesting | <is | ok>]
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";
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fn main() {
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HelpMenuGrammar::parse(Rule::HelpMenu, INPUT)
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.expect("Error parsing file")
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.next()
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.expect("Infallible")
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.into_inner()
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.filter(|pair| Rule::Command == pair.as_rule())
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.for_each(|pair| {
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println!("{:#?}", pair);
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});
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}
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