initial commit

src/main.rs

@@ -0,0 +1,62 @@
+mod ast;
+mod parsing;
+
+use clap::{Parser, Subcommand};
+use std::fs;
+
+/// Experimental compiler for krone
+#[derive(Parser, Debug)]
+#[command(author = "Romain P. <rpqt@rpqt.fr>")]
+#[command(version, about, long_about = None)]
+struct Cli {
+    #[command(subcommand)]
+    command: Commands,
+}
+
+#[derive(Subcommand, Debug)]
+enum Commands {
+    Parse {
+        /// Path to the source file
+        file: String,
+
+        /// Dump the AST to stdout
+        #[arg(long)]
+        dump_ast: bool,
+
+        /// Add missing return types in the AST
+        #[arg(long)]
+        complete_ast: bool,
+    },
+}
+
+fn main() {
+    let cli = Cli::parse();
+
+    match &cli.command {
+        Commands::Parse {
+            file,
+            dump_ast,
+            complete_ast,
+        } => {
+            let source = fs::read_to_string(&file).expect("could not read the source file");
+            let mut ast = match parsing::parse(&source) {
+                Ok(ast) => ast,
+                Err(e) => panic!("Parsing error: {:#?}", e),
+            };
+
+            if *complete_ast {
+                if let Err(e) = ast.check_return_types() {
+                    eprintln!("{:#?}", e);
+                    return;
+                }
+            }
+
+            if *dump_ast {
+                println!("{:#?}", &ast);
+                return;
+            }
+
+            println!("Parsing OK");
+        }
+    }
+}