Initial params loading

Cargo.toml

@@ -6,3 +6,5 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+clap = { version = "4.4.8", features = ["derive"]}
+toml = "0.8.8"

params.toml

@@ -0,0 +1,5 @@
+[global_flow]
+gen_decl = 0.4
+gen_subroutine = 0.3
+gen_typedef = 0.0
+gen_generation = 0.3

src/main.rs

@@ -1,3 +1,19 @@
-fn main() {
-    println!("Hello, world!");
+use std::fs;
+use std::path::PathBuf;
+use clap::Parser;
+
+#[derive(Parser)]
+#[command(author, version, about, long_about = None)]
+struct Args {
+    config: PathBuf,
+}
+
+fn main() {
+    let args = Args::parse();
+    let params_toml = fs::read_to_string(&args.config)
+        .expect("Failed to read parameters file into string")
+        .parse::<toml::Table>()
+        .expect("Failed to parse TOML from parameters file");
+
+    println!("{}", params_toml["global_flow"]["gen_decl"]);
 }