RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-23 18:25:08 +00:00
Code Issues Activity Actions

LibJS: Add basic support for "with" statements

Browse source 
with statements evaluate an expression and put the result of it at the
"front" of the scope chain. This is implemented by creating a WithScope
object and placing it in front of the VM's current call frame's scope.
This commit is contained in:
Andreas Kling 2020-11-28 16:14:26 +01:00
parent c3fe9b4df8
commit 9de6443ab7
4 changed files with 135 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

19
Libraries/LibJS/AST.cpp
View file

@ -29,6 +29,7 @@
#include <AK/HashTable.h>
#include <AK/ScopeGuard.h>
#include <AK/StringBuilder.h>
#include <AK/TemporaryChange.h>
#include <LibCrypto/BigInt/SignedBigInteger.h>
#include <LibJS/AST.h>
#include <LibJS/Interpreter.h>
@ -46,6 +47,7 @@
#include <LibJS/Runtime/ScriptFunction.h>
#include <LibJS/Runtime/Shape.h>
#include <LibJS/Runtime/StringObject.h>
#include <LibJS/Runtime/WithScope.h>
#include <stdio.h>
namespace JS {
@ -255,9 +257,22 @@ Value IfStatement::execute(Interpreter& interpreter, GlobalObject& global_object
return js_undefined();
}
Value WithStatement::execute(Interpreter&, GlobalObject&) const
Value WithStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
ASSERT_NOT_REACHED();
auto object_value = m_object->execute(interpreter, global_object);
if (interpreter.exception())
return {};
auto* object = object_value.to_object(global_object);
if (interpreter.exception())
return {};
ASSERT(object);
auto* with_scope = interpreter.heap().allocate<WithScope>(global_object, *object, interpreter.vm().call_frame().scope);
TemporaryChange<ScopeObject*> scope_change(interpreter.vm().call_frame().scope, with_scope);
interpreter.execute_statement(global_object, m_body);
return {};
}
Value WhileStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const