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LibJS: Allow "delete someGlobalVariable"

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This is solved by allowing Identifier nodes to produce a Reference with
the global object as base.
This commit is contained in:
Andreas Kling 2020-04-27 12:37:27 +02:00
parent 67b8e6fc5b
commit 3c4a9e421f
6 changed files with 54 additions and 0 deletions
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13
Libraries/LibJS/Interpreter.cpp
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@ -33,6 +33,7 @@
#include <LibJS/Runtime/MarkedValueList.h>
#include <LibJS/Runtime/NativeFunction.h>
#include <LibJS/Runtime/Object.h>
#include <LibJS/Runtime/Reference.h>
#include <LibJS/Runtime/Shape.h>
#include <LibJS/Runtime/Value.h>
@ -163,6 +164,18 @@ Value Interpreter::get_variable(const FlyString& name)
return global_object().get(name);
}
Reference Interpreter::get_reference(const FlyString& name)
{
if (m_call_stack.size()) {
for (auto* environment = current_environment(); environment; environment = environment->parent()) {
auto possible_match = environment->get(name);
if (possible_match.has_value())
return { Reference::LocalVariable, name };
}
}
return { &global_object(), PropertyName(name) };
}
void Interpreter::gather_roots(Badge<Heap>, HashTable<Cell*>& roots)
{
roots.set(m_global_object);