Organize crates

compiler/erg_parser/main.rs

@@ -0,0 +1,22 @@
+extern crate erg_common;
+extern crate erg_parser;
+
+use std::process;
+
+use erg_common::config::ErgConfig;
+use erg_common::traits::Runnable;
+
+use erg_parser::lex::LexerRunner;
+use erg_parser::ParserRunner;
+
+fn main() {
+    let cfg = ErgConfig::parse();
+    match cfg.mode {
+        "lex" => { LexerRunner::run(cfg); }
+        "parse" | "exec" => { ParserRunner::run(cfg); }
+        other => {
+            println!("invalid mode: {other}");
+            process::exit(1);
+        }
+    }
+}