Add parser, vm, objects

Big ol thing. You should check it out sometime

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

src/main.rs

@@ -1,15 +1,24 @@
+mod compile;
 mod object;
 mod syn;
+mod vm;
 
 use std::io::Read;
 use std::path::PathBuf;
 use structopt::StructOpt;
-use syn::lexer::Lexer;
+use syn::parser::Parser;
+use vm::machine::MachineBuilder;
 
 #[derive(Debug, StructOpt)]
 struct Opt {
     #[structopt(name = "PATH", parse(from_os_str))]
     path: Option<PathBuf>,
+
+    #[structopt(long)]
+    max_stack_size: Option<usize>,
+
+    #[structopt(long)]
+    max_arena_objects: Option<usize>,
 }
 
 type Result<T = (), E = Box<dyn std::error::Error>> = std::result::Result<T, E>;
@@ -25,10 +34,16 @@ fn main() -> Result {
         input
     };
 
-    let mut lexer = Lexer::new(&text);
-    while let Some(token) = lexer.next()? {
-        println!("{:?}", token);
+    let mut parser = Parser::from(text.as_str());
+    let mut exprs = Vec::new();
+    while !parser.is_eof() {
+        exprs.extend(parser.next_expr_list()?);
     }
 
+    let machine = MachineBuilder::default()
+        .max_stack_size(opt.max_stack_size)
+        .max_arena_objects(opt.max_arena_objects)
+        .finish();
+
     Ok(())
 }