diff options
Diffstat (limited to 'Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp')
| -rw-r--r-- | Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp b/Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp index 5df7232dc8..cc75f71b28 100644 --- a/Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp +++ b/Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp @@ -393,6 +393,34 @@ ObjectEnvironment* new_object_environment(Object& object, bool is_with_environme return global_object.heap().allocate<ObjectEnvironment>(global_object, object, is_with_environment ? ObjectEnvironment::IsWithEnvironment::Yes : ObjectEnvironment::IsWithEnvironment::No, environment); } +// 9.1.2.4 NewFunctionEnvironment ( F, newTarget ), https://tc39.es/ecma262/#sec-newfunctionenvironment +FunctionEnvironment* new_function_environment(ECMAScriptFunctionObject& function, Object* new_target) +{ + auto& global_object = function.global_object(); + + // 1. Let env be a new function Environment Record containing no bindings. + auto* env = global_object.heap().allocate<FunctionEnvironment>(global_object, function.environment()); + + // 2. Set env.[[FunctionObject]] to F. + env->set_function_object(function); + + // 3. If F.[[ThisMode]] is lexical, set env.[[ThisBindingStatus]] to lexical. + if (function.this_mode() == ECMAScriptFunctionObject::ThisMode::Lexical) + env->set_this_binding_status(FunctionEnvironment::ThisBindingStatus::Lexical); + // 4. Else, set env.[[ThisBindingStatus]] to uninitialized. + else + env->set_this_binding_status(FunctionEnvironment::ThisBindingStatus::Uninitialized); + + // 5. Set env.[[NewTarget]] to newTarget. + env->set_new_target(new_target ?: js_undefined()); + + // 6. Set env.[[OuterEnv]] to F.[[Environment]]. + // NOTE: Done in step 1 via the FunctionEnvironment constructor. + + // 7. Return env. + return env; +} + // 9.4.3 GetThisEnvironment ( ), https://tc39.es/ecma262/#sec-getthisenvironment Environment& get_this_environment(VM& vm) { |