refactor: 拆分编译流水线过程以避免逻辑漂移

crates/oxide_compiler/src/passes/expr/object/count.rs

@@ -0,0 +1,52 @@
+use super::*;
+impl Compiler {
+    fn count_object_expression(&self, expr: &Expression, ctx: &mut CompileCtx) {
+        let Expression::ObjectExpression(obj) = expr else {
+            return;
+        };
+        ctx.alloc_reg();
+        ctx.projected_pc += 1; // NEW_OBJECT
+        let prop_checkpoint = ctx.reg_checkpoint();
+        for prop in &obj.properties {
+            if let oxide_parser::ObjectPropertyKind::ObjectProperty(p) = prop {
+                if matches!(p.kind, oxide_parser::PropertyKind::Get | oxide_parser::PropertyKind::Set) {
+                    self.count_expression(&p.value, ctx);
+                    ctx.count_load_const(); // undefined getter/setter placeholder
+                    ctx.count_define_accessor(); // DEFINE_ACCESSOR + ext
+                } else {
+                    ctx.alloc_reg();
+                    ctx.projected_pc += 1; // LOAD_CONST key
+                    self.count_expression(&p.value, ctx);
+                    ctx.projected_pc += 1; // SET_PROP
+                }
+                ctx.restore_reg_checkpoint(prop_checkpoint);
+            }
+        }
+    }
+
+    fn count_array_expression(&self, expr: &Expression, ctx: &mut CompileCtx) {
+        let Expression::ArrayExpression(arr) = expr else {
+            return;
+        };
+        ctx.alloc_reg();
+        ctx.projected_pc += 1; // NEW_ARRAY
+        let elem_checkpoint = ctx.reg_checkpoint();
+        for elem in &arr.elements {
+            if let Some(e) = elem.as_expression() {
+                self.count_expression(e, ctx);
+                ctx.alloc_reg();
+                ctx.projected_pc += 1; // LOAD_CONST index
+                ctx.projected_pc += 1; // SET_ELEM
+                ctx.restore_reg_checkpoint(elem_checkpoint);
+            }
+        }
+    }
+
+    pub(crate) fn count_object_domain(&self, expr: &Expression, ctx: &mut CompileCtx) {
+        match expr {
+            Expression::ObjectExpression(_) => self.count_object_expression(expr, ctx),
+            Expression::ArrayExpression(_) => self.count_array_expression(expr, ctx),
+            _ => {}
+        }
+    }
+}

crates/oxide_compiler/src/passes/expr/object/emit.rs

@@ -0,0 +1,79 @@
+use super::*;
+impl Compiler {
+    fn emit_object_expression(&self, obj: &oxide_parser::ObjectExpression, ctx: &mut CompileCtx) -> Result<u8, String> {
+        let obj_reg = ctx.alloc_reg();
+        ctx.emit(opcode::encode(OpCode::NEW_OBJECT, obj_reg, 0, 0));
+        let prop_checkpoint = ctx.reg_checkpoint();
+        for prop in &obj.properties {
+            let oxide_parser::ObjectPropertyKind::ObjectProperty(p) = prop else {
+                return Err("spread properties not yet supported".into());
+            };
+            let prop_name = match &p.key {
+                oxide_parser::PropertyKey::StaticIdentifier(ident) => ident.name.as_str().to_string(),
+                oxide_parser::PropertyKey::StringLiteral(s) => s.value.to_string(),
+                _ => return Err("unsupported object property key type".into()),
+            };
+            match p.kind {
+                PropertyKind::Get | PropertyKind::Set => {
+                    let accessor_reg = self.emit_expression(&p.value, ctx)?;
+                    if let Some(sub_mod) = ctx.sub_modules.last_mut() {
+                        sub_mod.function_name = Some(prop_name.to_string());
+                    }
+                    let undef_reg = self.emit_undefined(ctx);
+                    let (get_reg, set_reg) = if p.kind == PropertyKind::Get {
+                        (accessor_reg, undef_reg)
+                    } else {
+                        (undef_reg, accessor_reg)
+                    };
+                    let idx = ctx.add_constant(Constant::String(prop_name.to_string()));
+                    ctx.emit(opcode::encode(OpCode::DEFINE_ACCESSOR, obj_reg, get_reg, set_reg));
+                    ctx.emit(idx as u32);
+                    ctx.restore_reg_checkpoint(prop_checkpoint);
+                }
+                _ => {
+                    let idx = ctx.add_constant(Constant::String(prop_name.to_string()));
+                    let key_reg = ctx.alloc_reg();
+                    ctx.emit_load_const(key_reg, idx);
+                    let val_reg = self.emit_expression(&p.value, ctx)?;
+                    // Name inference: if property value is an arrow function,
+                    // set the compiled sub_module's function_name to the property key.
+                    if matches!(&p.value, Expression::ArrowFunctionExpression(_)) {
+                        if let Some(sub_mod) = ctx.sub_modules.last_mut() {
+                            sub_mod.function_name = Some(prop_name.to_string());
+                        }
+                    }
+                    ctx.emit(opcode::encode(OpCode::SET_PROP, obj_reg, val_reg, key_reg));
+                    ctx.restore_reg_checkpoint(prop_checkpoint);
+                }
+            }
+        }
+        Ok(obj_reg)
+    }
+
+    fn emit_array_expression(&self, arr: &oxide_parser::ArrayExpression, ctx: &mut CompileCtx) -> Result<u8, String> {
+        let arr_reg = ctx.alloc_reg();
+        let n = arr.elements.len() as u16;
+        ctx.emit(opcode::encode(OpCode::NEW_ARRAY, arr_reg, (n & 0xFF) as u8, ((n >> 8) & 0xFF) as u8));
+        let elem_checkpoint = ctx.reg_checkpoint();
+        for (i, elem) in arr.elements.iter().enumerate() {
+            let Some(e) = elem.as_expression() else {
+                return Err("spread not supported".into());
+            };
+            let val_reg = self.emit_expression(e, ctx)?;
+            let idx_reg = ctx.alloc_reg();
+            let idx = ctx.add_constant(Constant::Int(i as i32));
+            ctx.emit_load_const(idx_reg, idx);
+            ctx.emit(opcode::encode(OpCode::SET_ELEM, arr_reg, idx_reg, val_reg));
+            ctx.restore_reg_checkpoint(elem_checkpoint);
+        }
+        Ok(arr_reg)
+    }
+
+    pub(crate) fn emit_object_domain(&self, expr: &Expression, ctx: &mut CompileCtx) -> Result<u8, String> {
+        match expr {
+            Expression::ObjectExpression(obj) => self.emit_object_expression(obj, ctx),
+            Expression::ArrayExpression(arr) => self.emit_array_expression(arr, ctx),
+            _ => self.emit_unsupported_expression(expr, ctx),
+        }
+    }
+}

crates/oxide_compiler/src/passes/expr/object/mod.rs

@@ -0,0 +1,3 @@
+pub use super::*;
+pub mod count;
+pub mod emit;