more vm and alloc and intern

src/vm.rs

@@ -0,0 +1,20 @@
+use crate::bytecode::FnBlock;
+use crate::gc::RtAlloc;
+
+type VmResult = Result<(), ()>;
+
+pub fn execute<'bc>(bytecode: &'bc [FnBlock<'bc>], alloc: RtAlloc) -> Result<(), ()> {
+    let _vm = Vm {
+        blocks: bytecode,
+        current: bytecode.first().ok_or(())?,
+        alloc,
+    };
+
+    Ok(())
+}
+
+struct Vm<'bc> {
+    blocks: &'bc [FnBlock<'bc>],
+    current: &'bc FnBlock<'bc>,
+    alloc: RtAlloc,
+}