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
2025-09-20 08:18:55 +00:00 · 2024-11-09 12:25:08 -05:00 · 2024-11-09 12:25:08 -05:00 · 93712b24bf · 2024-11-10 11:51:52 +00:00
commit 93712b24bf
parent 950e819ee7
4547 changed files with 104 additions and 113 deletions
--- a/Libraries/LibJS/Runtime/StringOrSymbol.h
+++ b/Libraries/LibJS/Runtime/StringOrSymbol.h
@ -0,0 +1,163 @@
+/*
+ * Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/DeprecatedFlyString.h>
+#include <LibJS/Runtime/PrimitiveString.h>
+#include <LibJS/Runtime/Symbol.h>
+#include <LibJS/Runtime/Value.h>
+
+namespace JS {
+
+class StringOrSymbol {
+public:
+    StringOrSymbol()
+        : m_bits(0)
+    {
+    }
+
+    StringOrSymbol(char const* chars)
+        : StringOrSymbol(DeprecatedFlyString(chars))
+    {
+    }
+
+    StringOrSymbol(ByteString const& string)
+        : StringOrSymbol(DeprecatedFlyString(string))
+    {
+    }
+
+    StringOrSymbol(DeprecatedFlyString const& string)
+        : m_string(string)
+    {
+    }
+
+    ~StringOrSymbol()
+    {
+        if (is_string())
+            m_string.~DeprecatedFlyString();
+    }
+
+    StringOrSymbol(Symbol const* symbol)
+        : m_symbol_with_tag(symbol)
+    {
+        set_symbol_flag();
+    }
+
+    StringOrSymbol(StringOrSymbol const& other)
+    {
+        if (other.is_string())
+            new (&m_string) DeprecatedFlyString(other.m_string);
+        else
+            m_bits = other.m_bits;
+    }
+
+    StringOrSymbol(StringOrSymbol&& other)
+    {
+        if (other.is_string())
+            new (&m_string) DeprecatedFlyString(move(other.m_string));
+        else
+            m_bits = exchange(other.m_bits, 0);
+    }
+
+    ALWAYS_INLINE bool is_valid() const { return m_bits != 0; }
+    ALWAYS_INLINE bool is_symbol() const { return is_valid() && (m_bits & 2); }
+    ALWAYS_INLINE bool is_string() const { return is_valid() && !(m_bits & 2); }
+
+    ALWAYS_INLINE DeprecatedFlyString as_string() const
+    {
+        VERIFY(is_string());
+        return m_string;
+    }
+
+    ALWAYS_INLINE Symbol const* as_symbol() const
+    {
+        VERIFY(is_symbol());
+        return reinterpret_cast<Symbol const*>(m_bits & ~2ULL);
+    }
+
+    ByteString to_display_string() const
+    {
+        if (is_string())
+            return as_string();
+        if (is_symbol())
+            return as_symbol()->descriptive_string().release_value_but_fixme_should_propagate_errors().to_byte_string();
+        VERIFY_NOT_REACHED();
+    }
+
+    Value to_value(VM& vm) const
+    {
+        if (is_string())
+            return PrimitiveString::create(vm, as_string());
+        if (is_symbol())
+            return const_cast<Symbol*>(as_symbol());
+        return {};
+    }
+
+    void visit_edges(Cell::Visitor& visitor)
+    {
+        if (is_symbol())
+            visitor.visit(const_cast<Symbol*>(as_symbol()));
+    }
+
+    ALWAYS_INLINE bool operator==(StringOrSymbol const& other) const
+    {
+        if (is_string())
+            return other.is_string() && m_string == other.m_string;
+        if (is_symbol())
+            return other.is_symbol() && as_symbol() == other.as_symbol();
+        return true;
+    }
+
+    StringOrSymbol& operator=(StringOrSymbol const& other)
+    {
+        if (this != &other) {
+            this->~StringOrSymbol();
+            new (this) StringOrSymbol(other);
+        }
+        return *this;
+    }
+
+    StringOrSymbol& operator=(StringOrSymbol&& other)
+    {
+        if (this != &other) {
+            this->~StringOrSymbol();
+            new (this) StringOrSymbol(move(other));
+        }
+        return *this;
+    }
+
+    unsigned hash() const
+    {
+        if (is_string())
+            return m_string.hash();
+        return ptr_hash(as_symbol());
+    }
+
+private:
+    ALWAYS_INLINE void set_symbol_flag()
+    {
+        m_bits |= 2;
+    }
+
+    union {
+        DeprecatedFlyString m_string;
+        Symbol const* m_symbol_with_tag;
+        uintptr_t m_bits;
+    };
+};
+
+static_assert(sizeof(StringOrSymbol) == sizeof(uintptr_t));
+
+}
+
+template<>
+struct AK::Traits<JS::StringOrSymbol> : public DefaultTraits<JS::StringOrSymbol> {
+    static unsigned hash(JS::StringOrSymbol const& key)
+    {
+        return key.hash();
+    }
+};