Merge pull request #4 from slothlang/vm-basics

Basic VM

1 files changed, 53 insertions, 0 deletions

diff --git a/crates/sloth_vm/src/value.rs b/crates/sloth_vm/src/value.rs
new file mode 100644
index 0000000..f149c0e
--- /dev/null
+++ b/crates/sloth_vm/src/value.rs
@@ -0,0 +1,53 @@
+use crate::native::NativeFunction;
+use crate::Chunk;
+
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub enum Primitive {
+    Integer(i128),
+    Float(f64),
+    Bool(bool),
+    /// Pointer to an object living on heap
+    Object(u32),
+    Empty,
+}
+
+pub struct Object {
+    /// If the object has been marked by the VM or not
+    pub(crate) marked: bool,
+    pub(crate) typ: ObjectType,
+}
+
+impl Object {
+    pub fn new(typ: ObjectType) -> Self {
+        Self { marked: false, typ }
+    }
+}
+
+pub enum ObjectType {
+    Box(Primitive),
+    String(String),
+    List(Vec<Primitive>),
+
+    Function(Function),
+    NativeFunction(NativeFunction),
+
+    Free { next: usize },
+}
+
+pub struct Function {
+    pub(crate) name: Option<String>,
+    pub(crate) chunk: Chunk,
+    pub(crate) arity: u8,
+    pub(crate) returns_value: bool,
+}
+
+impl Function {
+    pub(crate) fn root(chunk: Chunk) -> Self {
+        Self {
+            name: None,
+            chunk,
+            arity: 0,
+            returns_value: false,
+        }
+    }
+}