feat: less clone on symbol

src/bytecode.rs

@@ -1,3 +1,5 @@
+use std::collections::HashMap;
+
 use ecow::EcoString;
 
 use crate::ty::internal::{Const, Param};
@@ -11,10 +13,10 @@ pub enum OpCode {
     /// load a constant onto stack
     Const { value: Const },
     /// load a dynamic var onto stack
-    LookUp { sym: EcoString },
+    LookUp { sym: usize },
     /// load a thunk lazily onto stack
     LoadThunk { idx: usize },
-    /// TODO:
+    /// let TOS capture current environment
     CaptureEnv,
     /// force TOS to value
     ForceValue,
@@ -40,7 +42,7 @@ pub enum OpCode {
     /// finalize the recursive attribute set at TOS
     FinalizeRec,
     /// [ .. set value ] consume 1 element, push a static kv pair (`name`, `value`) into `set`
-    PushStaticAttr { name: EcoString },
+    PushStaticAttr { name: usize },
     /// [ .. set name value ] consume 2 elements, push a dynamic kv pair (`name`, `value`) in to `set`
     PushDynamicAttr,
 
@@ -59,13 +61,13 @@ pub enum OpCode {
     /// [ .. a ] consume 1 element, perform a unary operation `op` `a`
     UnOp { op: UnOp },
     /// set TOS to the bool value of whether TOS contains `sym`
-    HasAttr { sym: EcoString },
+    HasAttr { sym: usize },
     /// [ .. set sym ] consume 2 elements, set TOS to the bool value of whether `set` contains `sym`
     HasDynamicAttr,
     /// [ .. set ] select `sym` from `set`
-    Select { sym: EcoString },
+    Select { sym: usize },
     /// [ .. set default ] select `sym` from `set` or `default`
-    SelectOrDefault { sym: EcoString },
+    SelectOrDefault { sym: usize },
     /// [ .. set sym ] select `sym` from `set`
     SelectDynamic,
     /// [ .. set sym default ] select `sym` from `set` or `default`
@@ -82,15 +84,20 @@ pub enum OpCode {
 #[derive(Debug, Clone, Copy)]
 pub enum BinOp {
     Add,
+    Sub,
+    Mul,
+    Div,
     And,
     Or,
     Eq,
+    Lt,
     Con,
     Upd,
 }
 
 #[derive(Debug, Clone, Copy)]
 pub enum UnOp {
+    Neg,
     Not,
 }
 
@@ -105,4 +112,6 @@ pub struct Program {
     pub top_level: OpCodes,
     pub thunks: Slice<OpCodes>,
     pub funcs: Slice<Func>,
+    pub symbols: Vec<EcoString>,
+    pub symmap: HashMap<EcoString, usize>,
 }