47 lines
944 B
Rust
47 lines
944 B
Rust
use winnow::prelude::*;
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mod parser;
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#[cfg(test)]
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mod test;
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fn main() -> Result<(), lexopt::Error> {
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let args = Args::parse()?;
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let input = args.input.as_deref().unwrap_or("1 + 1");
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match parser::pratt_parser.parse(input) {
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Ok(result) => {
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println!("{result}");
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}
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Err(err) => {
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println!("FAILED");
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println!("{err}");
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}
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}
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Ok(())
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}
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#[derive(Default)]
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struct Args {
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input: Option<String>,
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}
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impl Args {
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fn parse() -> Result<Self, lexopt::Error> {
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use lexopt::prelude::*;
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let mut res = Args::default();
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let mut args = lexopt::Parser::from_env();
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while let Some(arg) = args.next()? {
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match arg {
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Value(input) => {
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res.input = Some(input.string()?);
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}
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_ => return Err(arg.unexpected()),
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}
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}
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Ok(res)
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}
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}
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