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args parsing

pull/5/head
azur 2023-03-02 11:46:10 +07:00
parent 19f513882b
commit 2afbb05bb6
4 changed files with 201 additions and 4 deletions
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182
Cargo.lock generated
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@ -13,6 +13,32 @@ dependencies = [
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1
Cargo.toml
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@ -5,3 +5,4 @@ edition = "2021"
[dependencies]
chumsky = "0.9.0"
structopt = "0.3.26"

11
src/args.rs Normal file
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@ -0,0 +1,11 @@
use std::path::PathBuf;
use structopt::StructOpt;
#[derive(Debug, StructOpt)]
pub struct Options {
#[structopt(name = "FILE", parse(from_os_str))]
pub file: PathBuf,
#[structopt(short, long = "out", parse(from_os_str))]
pub output: Option<PathBuf>,
}

11
src/main.rs
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@ -1,15 +1,17 @@
#![feature(trait_alias)]
pub mod read;
pub mod trans;
pub mod args;
use std::io::Write;
use args::Options;
use read::parse::{lex, parse};
use structopt::StructOpt;
use trans::low::{translate_expr, translate_js};
fn main() {
let path = std::env::args().nth(1).expect("No file path provided");
let src = std::fs::read_to_string(path).expect("Failed to read file");
let opt = Options::from_args();
let src = std::fs::read_to_string(opt.file).expect("Failed to read file");
let (tokens, lex_errs) = lex(src.to_owned());
@ -20,7 +22,8 @@ fn main() {
let nexprs = ast.into_iter().map(|(e, _)| translate_expr(e)).collect::<Vec<_>>();
let jsexprs = nexprs.into_iter().map(translate_js).collect::<Vec<_>>();
let mut file = std::fs::File::create("out.js").expect("Failed to create file");
let mut file = std::fs::File::create(opt.output.unwrap_or("out.js".into()))
.expect("Failed to create file");
let s = jsexprs
.into_iter()
.map(|e| {