Module _5_generate

Available on crate feature extradocs only.

 

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What gets generated

Usually calling derive macro on a type generates code to derive a trait implementation for this type. With bpaf it’s slightly different. It instead generates a function with a name that depends on the name of the type and gives either a composable parser (Parser) or option parser (OptionParser) back.

You can customize the function name with generate annotation at the top level:

#[derive(Debug, Clone, Bpaf)]
#[bpaf(options, generate(my_options))]
pub struct Options {
    /// A simple switch
    switch: bool
}
 
 
fn main() {
    let opts = my_options().run();
    println!("{:?}", opts);
}

 

← Parsing structs and enums

↑ Derive API tutorial ↑

Making nested parsers →