feat: 对小整数做额外枚举以优化性能

crates/oxide_compiler/src/compiler.rs

@@ -8,6 +8,10 @@ pub use oxide_parser::{BinaryOperator, Expression, Statement, UnaryOperator};
 
 pub struct Compiler;
 
+fn is_int_literal(value: f64) -> bool {
+    value.fract() == 0.0 && value >= i32::MIN as f64 && value <= i32::MAX as f64
+}
+
 struct CompileCtx {
     bytecode: Vec<opcode::Instr>,
     constants: Vec<Constant>,
@@ -312,7 +316,11 @@ impl Compiler {
     fn emit_expression(&self, expr: &Expression, ctx: &mut CompileCtx) -> Result<u8, String> {
         match expr {
             Expression::NumericLiteral(n) => {
-                let idx = ctx.add_constant(Constant::Number(n.value));
+                let idx = if is_int_literal(n.value) {
+                    ctx.add_constant(Constant::Int(n.value as i32))
+                } else {
+                    ctx.add_constant(Constant::Number(n.value))
+                };
                 let r = ctx.alloc_reg();
                 ctx.emit(opcode::encode(
                     OpCode::LOAD_CONST,

crates/oxide_compiler/src/module.rs

@@ -5,6 +5,7 @@ use crate::opcode::{self, OpCode};
 #[derive(Debug, Clone, PartialEq)]
 pub enum Constant {
     Number(f64),
+    Int(i32),
     String(String),
     Boolean(bool),
     Null,

crates/oxide_compiler/tests/compiler_tests.rs

@@ -34,7 +34,7 @@ fn compile_constants() {
     assert!(!module.constants.is_empty());
     assert_eq!(
         module.constants[0],
-        oxide_compiler::compiler::Constant::Number(42.0)
+        oxide_compiler::compiler::Constant::Int(42)
     );
 }
 
@@ -120,7 +120,7 @@ fn compile_var_declaration() {
     assert!(!module.bytecode.is_empty());
     assert_eq!(
         module.constants[0],
-        oxide_compiler::compiler::Constant::Number(42.0)
+        oxide_compiler::compiler::Constant::Int(42)
     );
 }
 

crates/oxide_vm/src/vm.rs

@@ -113,6 +113,7 @@ impl Vm {
             .iter()
             .map(|c| match c {
                 Constant::Number(v) => JsValue::float(*v),
+                Constant::Int(v) => JsValue::int(*v),
                 Constant::String(s) => self.intern(s),
                 Constant::Boolean(b) => JsValue::bool(*b),
                 Constant::Null => JsValue::null(),

crates/oxide_vm/tests/vm_tests.rs

@@ -34,7 +34,7 @@ fn object_create_and_read() {
     assert!(obj.is_object());
     let obj_ref = unsafe { &*obj.as_js_object_ptr() };
     assert_eq!(obj_ref.prop_count(), 1, "object should have 1 property");
-    assert!(obj_ref.get_inline_prop(0).is_double());
+    assert!(obj_ref.get_inline_prop(0).is_int());
 }
 
 #[test]