Add vm and compile modules

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

src/compile/mod.rs

@@ -0,0 +1,42 @@
+pub mod sym;
+
+use crate::{
+    syn::ast::Stmt,
+    compile::sym::SymStack,
+};
+
+pub trait Pass {
+    type Out;
+    fn pass(&self, ctx: &mut Ctx) -> Self::Out;
+}
+
+// * Desugar
+// * Collect names as symbols
+// * Create basic blocks
+
+pub struct Ctx {
+    sym_stack: SymStack,
+}
+
+impl Ctx {
+    pub fn sym_stack(&self) -> &SymStack {
+        &self.sym_stack
+    }
+
+    pub fn sym_stack_mut(&mut self) -> &mut SymStack {
+        &mut self.sym_stack
+    }
+}
+
+// no sugar in the syntax quite yet
+/*
+pub struct Desugar;
+
+impl Pass<Vec<Stmt>> for Desugar {
+    type Out = Vec<Stmt>;
+
+    fn pass(&mut self, input: Vec<Stmt>) -> Vec<Stmt> {
+        input
+    }
+}
+*/