Merge pull request #38 from Plecra/basic-binary

Add a basic frontend for experimentation

src/main.rs

@@ -0,0 +1,23 @@
+use passerine::{
+    common::{closure::Closure, source::Source},
+    compiler::{lex, parse, desugar, gen, hoist},
+    vm::vm::VM,
+};
+
+pub fn main() -> Result<(), String> {
+    let path = std::env::args_os().nth(1).expect("Usage: <path>");
+
+    let source = Source::path(path.as_ref())
+        .map_err(|_| format!("Could not find source entrypoint {:?}", path))?;
+
+    let tokens    =   lex(source).map_err(|e| e.to_string())?;
+    let ast       = parse(tokens).map_err(|e| e.to_string())?;
+    let cst       =  desugar(ast).map_err(|e| e.to_string())?;
+    let sst       =    hoist(cst).map_err(|e| e.to_string())?;
+    let bytecode  =      gen(sst).map_err(|e| e.to_string())?;
+
+    let mut vm = VM::init(Closure::wrap(bytecode));
+    vm.run().map_err(|e| e.to_string())?;
+
+    Ok(())
+}