Create a first pass at a rust parser for the yunq language.

yunq/rust/src/main.rs

@@ -0,0 +1,30 @@
+mod lexer;
+mod parser;
+
+use std::error::Error;
+use std::fs::read_to_string;
+
+use clap::Parser;
+
+#[derive(Parser)]
+#[command(about)]
+struct Args {
+    // The .yunq file to parse
+    #[arg(short, long)]
+    input_path: String,
+}
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let args = Args::parse();
+    let input = read_to_string(args.input_path)?;
+    let tokens = lexer::lex_input(&input)?;
+
+    let mut ast_parser = parser::Parser::new(&tokens);
+    ast_parser.parse_ast()?;
+
+    for decl in ast_parser.ast() {
+        println!("{:?}", decl);
+    }
+
+    Ok(())
+}