Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibJS/Bytecode/Register.h

@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2021, Andreas Kling <andreas@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Format.h>
+
+namespace JS::Bytecode {
+
+class Register {
+public:
+    constexpr static u32 accumulator_index = 0;
+
+    static constexpr Register accumulator()
+    {
+        return Register(accumulator_index);
+    }
+
+    constexpr static u32 saved_return_value_index = 1;
+
+    static constexpr Register saved_return_value()
+    {
+        return Register(saved_return_value_index);
+    }
+
+    static constexpr u32 exception_index = 2;
+
+    static constexpr Register exception()
+    {
+        return Register(exception_index);
+    }
+
+    static constexpr Register this_value()
+    {
+        constexpr u32 this_value_index = 3;
+        return Register(this_value_index);
+    }
+
+    static constexpr Register return_value()
+    {
+        constexpr u32 return_value_index = 4;
+        return Register(return_value_index);
+    }
+
+    static constexpr Register saved_exception()
+    {
+        constexpr u32 saved_exception_index = 5;
+        return Register(saved_exception_index);
+    }
+
+    static constexpr u32 reserved_register_count = 6;
+
+    constexpr explicit Register(u32 index)
+        : m_index(index)
+    {
+    }
+
+    constexpr bool operator==(Register reg) const { return m_index == reg.index(); }
+
+    constexpr u32 index() const { return m_index; }
+
+private:
+    u32 m_index;
+};
+
+}
+
+template<>
+struct AK::Formatter<JS::Bytecode::Register> : AK::Formatter<FormatString> {
+    ErrorOr<void> format(FormatBuilder& builder, JS::Bytecode::Register const& value)
+    {
+        if (value.index() == JS::Bytecode::Register::accumulator_index)
+            return builder.put_string("acc"sv);
+        return AK::Formatter<FormatString>::format(builder, "${}"sv, value.index());
+    }
+};