// -*- mode: C++; c-file-style: "cc-mode" -*-
//*************************************************************************
//
// Code available from: https://verilator.org
//
// Copyright 2003-2025 by Wilson Snyder. This program is free software; you can
// redistribute it and/or modify it under the terms of either the GNU
// Lesser General Public License Version 3 or the Perl Artistic License
// Version 2.0.
// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
//
//*************************************************************************
///
/// \file
/// \brief Verilated common data type containers
///
/// verilated.h should be included instead of this file.
///
/// Those macro/function/variable starting or ending in _ are internal,
/// however many of the other function/macros here are also internal.
///
//*************************************************************************

#ifndef VERILATOR_VERILATED_TYPES_H_
#define VERILATOR_VERILATED_TYPES_H_

#ifndef VERILATOR_VERILATED_H_INTERNAL_
#error "verilated_types.h should only be included by verilated.h"
#endif

#include <algorithm>
#include <array>
#include <atomic>
#include <deque>
#include <map>
#include <memory>
#include <set>
#include <string>
#include <utility>

//=========================================================================
// Debug functions

#ifdef VL_DEBUG
/// Evaluate statement if VL_DEBUG defined
#define VL_DEBUG_IFDEF(stmt) \
    do { stmt } while (false)
/// Evaluate statement if VL_DEBUG defined and Verilated::debug() enabled
#define VL_DEBUG_IF(stmt) \
    do { \
        if (VL_UNLIKELY(Verilated::debug())) { stmt } \
    } while (false)
#else
// We intentionally do not compile the stmt to improve compile speed
#define VL_DEBUG_IFDEF(stmt) \
    do { \
    } while (false)
#define VL_DEBUG_IF(stmt) \
    do { \
    } while (false)
#endif

//===================================================================
// String formatters (required by below containers)

extern std::string VL_TO_STRING(CData lhs);
extern std::string VL_TO_STRING(SData lhs);
extern std::string VL_TO_STRING(IData lhs);
extern std::string VL_TO_STRING(QData lhs);
extern std::string VL_TO_STRING(double lhs);
inline std::string VL_TO_STRING(const std::string& obj) { return "\"" + obj + "\""; }
extern std::string VL_TO_STRING_W(int words, const WDataInP obj);

//=========================================================================
// Declare net data types

#define VL_SIG8(name, msb, lsb) CData name  ///< Declare signal, 1-8 bits
#define VL_SIG16(name, msb, lsb) SData name  ///< Declare signal, 9-16 bits
#define VL_SIG64(name, msb, lsb) QData name  ///< Declare signal, 33-64 bits
#define VL_SIG(name, msb, lsb) IData name  ///< Declare signal, 17-32 bits
#define VL_SIGW(name, msb, lsb, words) VlWide<words> name  ///< Declare signal, 65+ bits
#define VL_IN8(name, msb, lsb) CData name  ///< Declare input signal, 1-8 bits
#define VL_IN16(name, msb, lsb) SData name  ///< Declare input signal, 9-16 bits
#define VL_IN64(name, msb, lsb) QData name  ///< Declare input signal, 33-64 bits
#define VL_IN(name, msb, lsb) IData name  ///< Declare input signal, 17-32 bits
#define VL_INW(name, msb, lsb, words) VlWide<words> name  ///< Declare input signal, 65+ bits
#define VL_INOUT8(name, msb, lsb) CData name  ///< Declare bidir signal, 1-8 bits
#define VL_INOUT16(name, msb, lsb) SData name  ///< Declare bidir signal, 9-16 bits
#define VL_INOUT64(name, msb, lsb) QData name  ///< Declare bidir signal, 33-64 bits
#define VL_INOUT(name, msb, lsb) IData name  ///< Declare bidir signal, 17-32 bits
#define VL_INOUTW(name, msb, lsb, words) VlWide<words> name  ///< Declare bidir signal, 65+ bits
#define VL_OUT8(name, msb, lsb) CData name  ///< Declare output signal, 1-8 bits
#define VL_OUT16(name, msb, lsb) SData name  ///< Declare output signal, 9-16 bits
#define VL_OUT64(name, msb, lsb) QData name  ///< Declare output signal, 33-64 bits
#define VL_OUT(name, msb, lsb) IData name  ///< Declare output signal, 17-32 bits
#define VL_OUTW(name, msb, lsb, words) VlWide<words> name  ///< Declare output signal, 65+ bits

//===================================================================
// Functions needed here

constexpr IData VL_CLOG2_CE_Q(QData lhs) VL_PURE {
    // constexpr usage only! Recuses to meet C++11 constexpr func limitations
    return lhs <= 1 ? 0 : VL_CLOG2_CE_Q((lhs + 1) >> 1ULL) + 1;
}

// Metadata of processes
class VlProcess;

using VlProcessRef = std::shared_ptr<VlProcess>;

class VlProcess final {
    // MEMBERS
    int m_state;  // Current state of the process
    VlProcessRef m_parentp = nullptr;  // Parent process, if exists
    std::set<VlProcess*> m_children;  // Active child processes

public:
    // TYPES
    enum : int {  // Type int for compatibility with $c
        FINISHED = 0,
        RUNNING = 1,
        WAITING = 2,
        SUSPENDED = 3,
        KILLED = 4,
    };

    // CONSTRUCTORS
    // Construct independent process
    VlProcess()
        : m_state{RUNNING} {}
    // Construct child process of parent
    explicit VlProcess(VlProcessRef parentp)
        : m_state{RUNNING}
        , m_parentp{parentp} {
        m_parentp->attach(this);
    }

    ~VlProcess() {
        if (m_parentp) m_parentp->detach(this);
    }

    void attach(VlProcess* childp) { m_children.insert(childp); }
    void detach(VlProcess* childp) { m_children.erase(childp); }

    int state() const { return m_state; }
    void state(int s) { m_state = s; }
    void disable() {
        state(KILLED);
        disableFork();
    }
    void disableFork() {
        for (VlProcess* childp : m_children) childp->disable();
    }
    bool completed() const { return state() == FINISHED || state() == KILLED; }
    bool completedFork() const {
        for (const VlProcess* const childp : m_children)
            if (!childp->completed()) return false;
        return true;
    }
};

inline std::string VL_TO_STRING(const VlProcessRef& p) { return std::string("process"); }

//===================================================================
// Activity trigger vector

template <std::size_t N_Size>  //
class VlTriggerVec final {
    // TODO: static assert N_Size > 0, and don't generate when empty

    // MEMBERS
    alignas(16) std::array<uint64_t, roundUpToMultipleOf<64>(N_Size) / 64> m_flags;  // The flags

public:
    // CONSTRUCTOR
    VlTriggerVec() { clear(); }
    ~VlTriggerVec() = default;

    // METHODS

    // Set all elements to false
    void clear() { m_flags.fill(0); }

    // Word at given 'wordIndex'
    uint64_t word(size_t wordIndex) const { return m_flags[wordIndex]; }

    // Set specified word to given value
    void setWord(size_t wordIndex, uint64_t value) { m_flags[wordIndex] = value; }

    // Set specified bit to given value
    void setBit(size_t index, bool value) {
        uint64_t& w = m_flags[index / 64];
        const size_t bitIndex = index % 64;
        w &= ~(1ULL << bitIndex);
        w |= (static_cast<uint64_t>(value) << bitIndex);
    }

    // Return true iff at least one element is set
    bool any() const {
        for (size_t i = 0; i < m_flags.size(); ++i)
            if (m_flags[i]) return true;
        return false;
    }

    // Set all elements true in 'this' that are set in 'other'
    void thisOr(const VlTriggerVec<N_Size>& other) {
        for (size_t i = 0; i < m_flags.size(); ++i) m_flags[i] |= other.m_flags[i];
    }

    // Set elements of 'this' to 'a & !b' element-wise
    void andNot(const VlTriggerVec<N_Size>& a, const VlTriggerVec<N_Size>& b) {
        for (size_t i = 0; i < m_flags.size(); ++i) m_flags[i] = a.m_flags[i] & ~b.m_flags[i];
    }
};

//===================================================================
// SystemVerilog event type

class VlEventBase VL_NOT_FINAL {
public:
    virtual ~VlEventBase() = default;

    virtual void fire() = 0;
    virtual bool isFired() const = 0;
    virtual bool isTriggered() const = 0;
    virtual void clearFired() = 0;
    virtual void clearTriggered() = 0;
};

class VlEvent final : public VlEventBase {
    // MEMBERS
    bool m_fired = false;  // Fired on this scheduling iteration
    bool m_triggered = false;  // Triggered state of event persisting until next time step

public:
    // CONSTRUCTOR
    VlEvent() = default;
    ~VlEvent() override = default;

    friend std::string VL_TO_STRING(const VlEvent& e);
    friend class VlAssignableEvent;
    // METHODS
    void fire() override { m_fired = m_triggered = true; }
    bool isFired() const override { return m_fired; }
    bool isTriggered() const override { return m_triggered; }
    void clearFired() override { m_fired = false; }
    void clearTriggered() override { m_triggered = false; }
};

class VlAssignableEvent final : public std::shared_ptr<VlEvent>, public VlEventBase {
public:
    // Constructor
    VlAssignableEvent()
        : std::shared_ptr<VlEvent>(new VlEvent) {}
    ~VlAssignableEvent() override = default;

    // METHODS
    void fire() override { (*this)->m_fired = (*this)->m_triggered = true; }
    bool isFired() const override { return (*this)->m_fired; }
    bool isTriggered() const override { return (*this)->m_triggered; }
    void clearFired() override { (*this)->m_fired = false; }
    void clearTriggered() override { (*this)->m_triggered = false; }
};

inline std::string VL_TO_STRING(const VlEventBase& e);

inline std::string VL_TO_STRING(const VlEvent& e) {
    return "triggered="s + (e.isTriggered() ? "true" : "false");
}

inline std::string VL_TO_STRING(const VlAssignableEvent& e) {
    return "&{ " + VL_TO_STRING(*e) + " }";
}

inline std::string VL_TO_STRING(const VlEventBase& e) {
    if (const VlAssignableEvent& assignable = dynamic_cast<const VlAssignableEvent&>(e)) {
        return VL_TO_STRING(assignable);
    }
    return "triggered="s + (e.isTriggered() ? "true" : "false");
}

//===================================================================
// Random

// Random Number Generator with internal state
class VlRNG final {
    std::array<uint64_t, 2> m_state;

public:
    // The default constructor simply sets state, to avoid vl_rand64()
    // having to check for construction at each call
    // Alternative: seed with zero and check on rand64() call
    VlRNG() VL_MT_SAFE;
    explicit VlRNG(uint64_t seed0) VL_MT_SAFE : m_state{0x12341234UL, seed0} {}
    void srandom(uint64_t n) VL_MT_UNSAFE;
    std::string get_randstate() const VL_MT_UNSAFE;
    void set_randstate(const std::string& state) VL_MT_UNSAFE;
    uint64_t rand64() VL_MT_UNSAFE;
    // Threadsafe, but requires use on vl_thread_rng
    static uint64_t vl_thread_rng_rand64() VL_MT_SAFE;
    static VlRNG& vl_thread_rng() VL_MT_SAFE;
};

inline uint64_t vl_rand64() VL_MT_SAFE { return VlRNG::vl_thread_rng_rand64(); }

// RNG for shuffle()
class VlURNG final {
public:
    using result_type = size_t;
    static constexpr size_t min() { return 0; }
    static constexpr size_t max() { return 1ULL << 31; }
    size_t operator()() { return VL_MASK_I(31) & vl_rand64(); }
};

template <typename T_Value, uint64_t N_NumValues>
class VlRandC final {
    T_Value m_remaining = 0;  // Number of values to pull before re-randomize
    T_Value m_lfsr = 1;  // LFSR state

public:
    // CONSTRUCTORS
    VlRandC() {
        static_assert(N_NumValues >= 1, "");
        static_assert(sizeof(T_Value) == 8 || (N_NumValues < (1ULL << (8 * sizeof(T_Value)))), "");
    }
    // METHODS
    T_Value randomize(VlRNG& rngr) {
        if (VL_UNLIKELY(!m_remaining)) reseed(rngr);
        // Polynomials are first listed at https://users.ece.cmu.edu/~koopman/lfsr/
        static constexpr uint64_t s_polynomials[] = {
            0x0ULL,  // 0 never used (constant, no randomization)
            0x0ULL,  // 1
            0x3ULL,        0x5ULL,       0x9ULL,        0x12ULL,       0x21ULL,
            0x41ULL,       0x8eULL,      0x108ULL,      0x204ULL,      0x402ULL,
            0x829ULL,      0x100dULL,    0x2015ULL,     0x4001ULL,
            0x8016ULL,  // 16
            0x10004ULL,    0x20040ULL,   0x40013ULL,    0x80004ULL,    0x100002ULL,
            0x200001ULL,   0x400010ULL,  0x80000dULL,   0x1000004ULL,  0x2000023ULL,
            0x4000013ULL,  0x8000004ULL, 0x10000002ULL, 0x20000029ULL, 0x40000004ULL,
            0x80000057ULL,  // 32
            0x100000029ULL  // 33
        };
        constexpr uint32_t clogWidth = VL_CLOG2_CE_Q(N_NumValues) + 1;
        constexpr uint32_t lfsrWidth = (clogWidth < 2) ? 2 : clogWidth;
        constexpr T_Value polynomial = static_cast<T_Value>(s_polynomials[lfsrWidth]);
        // printf("  numV=%ld w=%d poly=%x\n", N_NumValues, lfsrWidth, polynomial);
        //  Loop until get reasonable value. Because we picked a LFSR of at most one
        //  extra bit in width, this will only require at most on average 1.5 loops
        do {
            m_lfsr = (m_lfsr & 1ULL) ? ((m_lfsr >> 1ULL) ^ polynomial) : (m_lfsr >> 1ULL);
        } while (m_lfsr > N_NumValues);  // Note if == then output value 0
        --m_remaining;
        T_Value result = (m_lfsr == N_NumValues) ? 0 : m_lfsr;
        // printf("    result=%x  (numv=%ld, rem=%d)\n", result, N_NumValues, m_remaining);
        return result;
    }
    void reseed(VlRNG& rngr) {
        constexpr uint32_t lfsrWidth = VL_CLOG2_CE_Q(N_NumValues) + 1;
        m_remaining = N_NumValues;
        do {
            m_lfsr = rngr.rand64() & VL_MASK_Q(lfsrWidth);
            // printf("    lfsr.reseed=%x\n", m_lfsr);
        } while (!m_lfsr);  // 0 not a legal seed
    }
};

// These require the class object to have the thread safety lock
inline IData VL_RANDOM_RNG_I(VlRNG& rngr) VL_MT_UNSAFE { return rngr.rand64(); }
inline QData VL_RANDOM_RNG_Q(VlRNG& rngr) VL_MT_UNSAFE { return rngr.rand64(); }
extern WDataOutP VL_RANDOM_RNG_W(VlRNG& rngr, int obits, WDataOutP outwp) VL_MT_UNSAFE;

//===================================================================
// Readmem/Writemem operation classes

class VlReadMem final {
    const bool m_hex;  // Hex format
    const int m_bits;  // Bit width of values
    const std::string& m_filename;  // Filename
    const QData m_end;  // End address (as specified by user)
    FILE* m_fp = nullptr;  // File handle for filename
    QData m_addr = 0;  // Next address to read
    int m_linenum = 0;  // Line number last read from file
    bool m_anyAddr = false;  // Had address directive in the file
public:
    VlReadMem(bool hex, int bits, const std::string& filename, QData start, QData end);
    ~VlReadMem();
    bool isOpen() const { return m_fp != nullptr; }
    int linenum() const { return m_linenum; }
    bool get(QData& addrr, std::string& valuer);
    void setData(void* valuep, const std::string& rhs);
};

class VlWriteMem final {
    const bool m_hex;  // Hex format
    const int m_bits;  // Bit width of values
    FILE* m_fp = nullptr;  // File handle for filename
    QData m_addr = 0;  // Next address to write
public:
    VlWriteMem(bool hex, int bits, const std::string& filename, QData start, QData end);
    ~VlWriteMem();
    bool isOpen() const { return m_fp != nullptr; }
    void print(QData addr, bool addrstamp, const void* valuep);
};

//===================================================================
/// Verilog wide packed bit container.
/// Similar to std::array<WData, N>, but lighter weight, only methods needed
/// by Verilator, to help compile time.
///
/// A 'struct' as we want this to be an aggregate type that allows
/// static aggregate initialization. Consider data members private.
///
/// For example a Verilog "bit [94:0]" will become a VlWide<3> because 3*32
/// bits are needed to hold the 95 bits. The MSB (bit 96) must always be
/// zero in memory, but during intermediate operations in the Verilated
/// internals is unpredictable.

static int _vl_cmp_w(int words, WDataInP const lwp, WDataInP const rwp) VL_PURE;

template <std::size_t N_Words>
struct VlWide;

// Type trait to check if a type is VlWide
template <typename>
struct VlIsVlWide : public std::false_type {};

template <std::size_t N_Words>
struct VlIsVlWide<VlWide<N_Words>> : public std::true_type {};

template <std::size_t N_Words>
struct VlWide final {
    static constexpr size_t Words = N_Words;

    // MEMBERS
    // This should be the only data member, otherwise generated static initializers need updating
    EData m_storage[N_Words];  // Contents of the packed array

    // CONSTRUCTORS
    // Default constructors and destructor are used. Note however that C++20 requires that
    // aggregate types do not have a user declared constructor, not even an explicitly defaulted
    // one.

    // OPERATOR METHODS
    // Default copy assignment operators are used.
    operator WDataOutP() VL_PURE { return &m_storage[0]; }  // This also allows []
    operator WDataInP() const VL_PURE { return &m_storage[0]; }  // This also allows []
    bool operator!=(const VlWide<N_Words>& that) const VL_PURE {
        for (size_t i = 0; i < N_Words; ++i) {
            if (m_storage[i] != that.m_storage[i]) return true;
        }
        return false;
    }

    // METHODS
    const EData& at(size_t index) const { return m_storage[index]; }
    EData& at(size_t index) { return m_storage[index]; }
    size_t size() const { return N_Words; }
    WData* data() { return &m_storage[0]; }
    const WData* data() const { return &m_storage[0]; }
    bool operator<(const VlWide<N_Words>& rhs) const {
        return _vl_cmp_w(N_Words, data(), rhs.data()) < 0;
    }
};

// Convert a C array to std::array reference by pointer magic, without copy.
// Data type (second argument) is so the function template can automatically generate.
template <std::size_t N_Words>
VlWide<N_Words>& VL_CVT_W_A(const WDataInP inp, const VlWide<N_Words>&) {
    return *((VlWide<N_Words>*)inp);
}

template <std::size_t N_Words>
std::string VL_TO_STRING(const VlWide<N_Words>& obj) {
    return VL_TO_STRING_W(N_Words, obj.data());
}

//===================================================================
// Verilog queue and dynamic array container
// There are no multithreaded locks on this; the base variable must
// be protected by other means
//
// Bound here is the maximum size() allowed, e.g. 1 + SystemVerilog bound
// For dynamic arrays it is always zero
template <typename T_Value, size_t N_MaxSize = 0>
class VlQueue final {
private:
    // TYPES
    using Deque = std::deque<T_Value>;

public:
    using const_iterator = typename Deque::const_iterator;
    template <typename T_Func>
    using WithFuncReturnType = decltype(std::declval<T_Func>()(0, std::declval<T_Value>()));

private:
    // MEMBERS
    Deque m_deque;  // State of the assoc array
    T_Value m_defaultValue;  // Default value

public:
    // CONSTRUCTORS
    // m_defaultValue isn't defaulted. Caller's constructor must do it.
    VlQueue() = default;
    ~VlQueue() = default;
    VlQueue(const VlQueue&) = default;
    VlQueue(VlQueue&&) = default;
    VlQueue& operator=(const VlQueue&) = default;
    VlQueue& operator=(VlQueue&&) = default;
    bool operator==(const VlQueue& rhs) const { return m_deque == rhs.m_deque; }
    bool operator!=(const VlQueue& rhs) const { return m_deque != rhs.m_deque; }
    bool operator<(const VlQueue& rhs) const {
        for (int index = 0; index < m_deque.size(); ++index) {
            if (m_deque[index] < rhs.m_deque[index]) return true;
        }
        return false;
    }

    // Standard copy constructor works. Verilog: assoca = assocb
    // Also must allow conversion from a different N_MaxSize queue
    template <size_t N_RhsMaxSize = 0>
    VlQueue operator=(const VlQueue<T_Value, N_RhsMaxSize>& rhs) {
        m_deque = rhs.privateDeque();
        if (VL_UNLIKELY(N_MaxSize && N_MaxSize < m_deque.size())) m_deque.resize(N_MaxSize - 1);
        return *this;
    }

    // Construct new object from _V_alue and/or _C_ontainer child objects
    static VlQueue consV(const T_Value& lhs) {
        VlQueue out;
        out.push_back(lhs);
        return out;
    }
    static VlQueue consVV(const T_Value& lhs, const T_Value& rhs) {
        VlQueue out;
        out.push_back(rhs);
        out.push_back(lhs);
        return out;
    }
    static VlQueue consCV(const VlQueue& lhs, const T_Value& rhs) {
        VlQueue out = lhs;
        out.push_front(rhs);
        return out;
    }
    static VlQueue consVC(const T_Value& lhs, const VlQueue& rhs) {
        VlQueue out = rhs;
        out.push_back(lhs);
        return out;
    }
    static VlQueue consCC(const VlQueue& lhs, const VlQueue& rhs) {
        VlQueue out = rhs;
        for (const auto& i : lhs.m_deque) out.push_back(i);
        return out;
    }

    // METHODS
    T_Value& atDefault() { return m_defaultValue; }
    const T_Value& atDefault() const { return m_defaultValue; }
    const Deque& privateDeque() const { return m_deque; }

    // Size. Verilog: function int size(), or int num()
    int size() const { return m_deque.size(); }
    // Clear array. Verilog: function void delete([input index])
    void clear() { m_deque.clear(); }
    void erase(int32_t index) {
        if (VL_LIKELY(index >= 0 && index < m_deque.size()))
            m_deque.erase(m_deque.begin() + index);
    }

    // Dynamic array new[] becomes a renew()
    void renew(size_t size) {
        clear();
        m_deque.resize(size, atDefault());
    }
    // Dynamic array new[]() becomes a renew_copy()
    void renew_copy(size_t size, const VlQueue<T_Value, N_MaxSize>& rhs) {
        if (size == 0) {
            clear();
        } else {
            *this = rhs;
            m_deque.resize(size, atDefault());
        }
    }
    void resize(size_t size) { m_deque.resize(size, atDefault()); }

    // function void q.push_front(value)
    void push_front(const T_Value& value) {
        m_deque.push_front(value);
        if (VL_UNLIKELY(N_MaxSize != 0 && m_deque.size() > N_MaxSize)) m_deque.pop_back();
    }
    // function void q.push_back(value)
    void push_back(const T_Value& value) {
        if (VL_LIKELY(N_MaxSize == 0 || m_deque.size() < N_MaxSize)) m_deque.push_back(value);
    }
    // function value_t q.pop_front();
    T_Value pop_front() {
        if (m_deque.empty()) return m_defaultValue;
        T_Value v = m_deque.front();
        m_deque.pop_front();
        return v;
    }
    // function value_t q.pop_back();
    T_Value pop_back() {
        if (m_deque.empty()) return m_defaultValue;
        T_Value v = m_deque.back();
        m_deque.pop_back();
        return v;
    }

    // Setting. Verilog: assoc[index] = v (should only be used by dynamic arrays)
    T_Value& atWrite(int32_t index) {
        // cppcheck-suppress variableScope
        static thread_local T_Value t_throwAway;
        // Needs to work for dynamic arrays, so does not use N_MaxSize
        if (VL_UNLIKELY(index < 0 || index >= m_deque.size())) {
            t_throwAway = atDefault();
            return t_throwAway;
        }
        return m_deque[index];
    }
    // Setting. Verilog: assoc[index] = v (should only be used by queues)
    T_Value& atWriteAppend(int32_t index) {
        // cppcheck-suppress variableScope
        static thread_local T_Value t_throwAway;
        if (VL_UNLIKELY(index < 0 || index >= m_deque.size())) {
            if (index == m_deque.size()) {
                push_back(atDefault());
                return m_deque[index];
            }
            t_throwAway = atDefault();
            return t_throwAway;
        }
        return m_deque[index];
    }
    // Accessing. Verilog: v = assoc[index]
    const T_Value& at(int32_t index) const {
        // Needs to work for dynamic arrays, so does not use N_MaxSize
        if (VL_UNLIKELY(index < 0 || index >= m_deque.size())) {
            return atDefault();
        } else {
            return m_deque[index];
        }
    }
    // Access with an index counted from end (e.g. q[$])
    T_Value& atWriteAppendBack(int32_t index) { return atWriteAppend(m_deque.size() - 1 - index); }
    const T_Value& atBack(int32_t index) const { return at(m_deque.size() - 1 - index); }

    // function void q.insert(index, value);
    void insert(int32_t index, const T_Value& value) {
        if (VL_UNLIKELY(index < 0 || index > m_deque.size())) return;
        m_deque.insert(m_deque.begin() + index, value);
    }

    // inside (set membership operator)
    bool inside(const T_Value& value) const {
        return std::find(m_deque.cbegin(), m_deque.cend(), value) != m_deque.cend();
    }

    // Return slice q[lsb:msb]
    VlQueue slice(int32_t lsb, int32_t msb) const {
        VlQueue out;
        if (VL_UNLIKELY(lsb < 0)) lsb = 0;
        if (VL_UNLIKELY(lsb >= m_deque.size())) lsb = m_deque.size() - 1;
        if (VL_UNLIKELY(msb >= m_deque.size())) msb = m_deque.size() - 1;
        for (int32_t i = lsb; i <= msb; ++i) out.push_back(m_deque[i]);
        return out;
    }
    VlQueue sliceFrontBack(int32_t lsb, int32_t msb) const {
        return slice(lsb, m_deque.size() - 1 - msb);
    }
    VlQueue sliceBackBack(int32_t lsb, int32_t msb) const {
        return slice(m_deque.size() - 1 - lsb, m_deque.size() - 1 - msb);
    }

    // For save/restore
    const_iterator begin() const { return m_deque.begin(); }
    const_iterator end() const { return m_deque.end(); }

    // Methods
    void sort() { std::sort(m_deque.begin(), m_deque.end()); }
    template <typename T_Func>
    void sort(T_Func with_func) {
        // with_func returns arbitrary type to use for the sort comparison
        std::sort(m_deque.begin(), m_deque.end(), [=](const T_Value& a, const T_Value& b) {
            // index number is meaningless with sort, as it changes
            return with_func(0, a) < with_func(0, b);
        });
    }
    void rsort() { std::sort(m_deque.rbegin(), m_deque.rend()); }
    template <typename T_Func>
    void rsort(T_Func with_func) {
        // with_func returns arbitrary type to use for the sort comparison
        std::sort(m_deque.rbegin(), m_deque.rend(), [=](const T_Value& a, const T_Value& b) {
            // index number is meaningless with sort, as it changes
            return with_func(0, a) < with_func(0, b);
        });
    }
    void reverse() { std::reverse(m_deque.begin(), m_deque.end()); }
    void shuffle() { std::shuffle(m_deque.begin(), m_deque.end(), VlURNG{}); }
    VlQueue unique() const {
        VlQueue out;
        std::set<T_Value> saw;
        for (const auto& i : m_deque) {
            const auto it = saw.find(i);
            if (it == saw.end()) {
                saw.insert(it, i);
                out.push_back(i);
            }
        }
        return out;
    }
    template <typename T_Func>
    VlQueue unique(T_Func with_func) const {
        VlQueue out;
        std::set<decltype(with_func(0, m_deque[0]))> saw;
        for (const auto& i : m_deque) {
            const auto i_mapped = with_func(0, i);
            const auto it = saw.find(i_mapped);
            if (it == saw.end()) {
                saw.insert(it, i_mapped);
                out.push_back(i);
            }
        }
        return out;
    }
    VlQueue<IData> unique_index() const {
        VlQueue<IData> out;
        IData index = 0;
        std::set<T_Value> saw;
        for (const auto& i : m_deque) {
            const auto it = saw.find(i);
            if (it == saw.end()) {
                saw.insert(it, i);
                out.push_back(index);
            }
            ++index;
        }
        return out;
    }
    template <typename T_Func>
    VlQueue<IData> unique_index(T_Func with_func) const {
        VlQueue<IData> out;
        IData index = 0;
        std::set<decltype(with_func(0, m_deque[0]))> saw;
        for (const auto& i : m_deque) {
            const auto i_mapped = with_func(index, i);
            auto it = saw.find(i_mapped);
            if (it == saw.end()) {
                saw.insert(it, i_mapped);
                out.push_back(index);
            }
            ++index;
        }
        return out;
    }
    template <typename T_Func>
    VlQueue find(T_Func with_func) const {
        VlQueue out;
        IData index = 0;
        for (const auto& i : m_deque) {
            if (with_func(index, i)) out.push_back(i);
            ++index;
        }
        return out;
    }
    template <typename T_Func>
    VlQueue<IData> find_index(T_Func with_func) const {
        VlQueue<IData> out;
        IData index = 0;
        for (const auto& i : m_deque) {
            if (with_func(index, i)) out.push_back(index);
            ++index;
        }
        return out;
    }
    template <typename T_Func>
    VlQueue find_first(T_Func with_func) const {
        // Can't use std::find_if as need index number
        IData index = 0;
        for (const auto& i : m_deque) {
            if (with_func(index, i)) return VlQueue::consV(i);
            ++index;
        }
        return VlQueue{};
    }
    template <typename T_Func>
    VlQueue<IData> find_first_index(T_Func with_func) const {
        IData index = 0;
        for (const auto& i : m_deque) {
            if (with_func(index, i)) return VlQueue<IData>::consV(index);
            ++index;
        }
        return VlQueue<IData>{};
    }
    template <typename T_Func>
    VlQueue find_last(T_Func with_func) const {
        IData index = m_deque.size() - 1;
        for (auto& item : vlstd::reverse_view(m_deque)) {
            if (with_func(index, item)) return VlQueue::consV(item);
            --index;
        }
        return VlQueue{};
    }
    template <typename T_Func>
    VlQueue<IData> find_last_index(T_Func with_func) const {
        IData index = m_deque.size() - 1;
        for (auto& item : vlstd::reverse_view(m_deque)) {
            if (with_func(index, item)) return VlQueue<IData>::consV(index);
            --index;
        }
        return VlQueue<IData>{};
    }

    // Reduction operators
    VlQueue min() const {
        if (m_deque.empty()) return VlQueue{};
        const auto it = std::min_element(m_deque.cbegin(), m_deque.cend());
        return VlQueue::consV(*it);
    }
    template <typename T_Func>
    VlQueue min(T_Func with_func) const {
        if (m_deque.empty()) return VlQueue{};
        const auto it = std::min_element(m_deque.cbegin(), m_deque.cend(),
                                         [&with_func](const IData& a, const IData& b) {
                                             return with_func(0, a) < with_func(0, b);
                                         });
        return VlQueue::consV(*it);
    }
    VlQueue max() const {
        if (m_deque.empty()) return VlQueue{};
        const auto it = std::max_element(m_deque.cbegin(), m_deque.cend());
        return VlQueue::consV(*it);
    }
    template <typename T_Func>
    VlQueue max(T_Func with_func) const {
        if (m_deque.empty()) return VlQueue{};
        const auto it = std::max_element(m_deque.cbegin(), m_deque.cend(),
                                         [&with_func](const IData& a, const IData& b) {
                                             return with_func(0, a) < with_func(0, b);
                                         });
        return VlQueue::consV(*it);
    }

    T_Value r_sum() const {
        T_Value out(0);  // Type must have assignment operator
        for (const auto& i : m_deque) out += i;
        return out;
    }
    template <typename T_Func>
    WithFuncReturnType<T_Func> r_sum(T_Func with_func) const {
        WithFuncReturnType<T_Func> out = WithFuncReturnType<T_Func>(0);
        IData index = 0;
        for (const auto& i : m_deque) out += with_func(index++, i);
        return out;
    }
    T_Value r_product() const {
        if (m_deque.empty()) return T_Value(0);  // The big three do it this way
        T_Value out = T_Value(1);
        for (const auto& i : m_deque) out *= i;
        return out;
    }
    template <typename T_Func>
    WithFuncReturnType<T_Func> r_product(T_Func with_func) const {
        if (m_deque.empty()) return WithFuncReturnType<T_Func>(0);  // The big three do it this way
        WithFuncReturnType<T_Func> out = WithFuncReturnType<T_Func>(1);
        IData index = 0;
        for (const auto& i : m_deque) out *= with_func(index++, i);
        return out;
    }
    T_Value r_and() const {
        if (m_deque.empty()) return T_Value(0);  // The big three do it this way
        T_Value out = ~T_Value(0);
        for (const auto& i : m_deque) out &= i;
        return out;
    }
    template <typename T_Func>
    WithFuncReturnType<T_Func> r_and(T_Func with_func) const {
        if (m_deque.empty()) return WithFuncReturnType<T_Func>(0);  // The big three do it this way
        IData index = 0;
        WithFuncReturnType<T_Func> out = ~WithFuncReturnType<T_Func>(0);
        for (const auto& i : m_deque) out &= with_func(index++, i);
        return out;
    }
    T_Value r_or() const {
        T_Value out = T_Value(0);
        for (const auto& i : m_deque) out |= i;
        return out;
    }
    template <typename T_Func>
    WithFuncReturnType<T_Func> r_or(T_Func with_func) const {
        WithFuncReturnType<T_Func> out = WithFuncReturnType<T_Func>(0);
        IData index = 0;
        for (const auto& i : m_deque) out |= with_func(index++, i);
        return out;
    }
    T_Value r_xor() const {
#ifdef VERILATOR_BIG3_NULLARY_ARITHMETICS_QUIRKS
        if (m_deque.empty()) return T_Value(0);
#endif
        T_Value out = T_Value(0);
        for (const auto& i : m_deque) out ^= i;
        return out;
    }
    template <typename T_Func>
    WithFuncReturnType<T_Func> r_xor(T_Func with_func) const {
        WithFuncReturnType<T_Func> out = WithFuncReturnType<T_Func>(0);
        IData index = 0;
        for (const auto& i : m_deque) out ^= with_func(index++, i);
        return out;
    }

    // Dumping. Verilog: str = $sformatf("%p", assoc)
    std::string to_string() const {
        if (m_deque.empty()) return "'{}";  // No trailing space
        std::string out = "'{";
        std::string comma;
        for (const auto& i : m_deque) {
            out += comma + VL_TO_STRING(i);
            comma = ", ";
        }
        return out + "} ";
    }
};

template <typename T_Value, size_t N_MaxSize>
std::string VL_TO_STRING(const VlQueue<T_Value, N_MaxSize>& obj) {
    return obj.to_string();
}

template <typename T_Value, size_t N_MaxSize>
struct VlContainsCustomStruct<VlQueue<T_Value, N_MaxSize>> : VlContainsCustomStruct<T_Value> {};

//===================================================================
// Verilog associative array container
// There are no multithreaded locks on this; the base variable must
// be protected by other means
//
template <typename T_Key, typename T_Value>
class VlAssocArray final {
private:
    // TYPES
    using Map = std::map<T_Key, T_Value>;

public:
    using const_iterator = typename Map::const_iterator;
    template <typename T_Func>
    using WithFuncReturnType
        = decltype(std::declval<T_Func>()(std::declval<T_Key>(), std::declval<T_Value>()));

private:
    // MEMBERS
    Map m_map;  // State of the assoc array
    T_Value m_defaultValue;  // Default value

public:
    // CONSTRUCTORS
    // m_defaultValue isn't defaulted. Caller's constructor must do it.
    VlAssocArray() = default;
    ~VlAssocArray() = default;
    VlAssocArray(const VlAssocArray&) = default;
    VlAssocArray(VlAssocArray&&) = default;
    VlAssocArray& operator=(const VlAssocArray&) = default;
    VlAssocArray& operator=(VlAssocArray&&) = default;
    bool operator==(const VlAssocArray& rhs) const { return m_map == rhs.m_map; }
    bool operator!=(const VlAssocArray& rhs) const { return m_map != rhs.m_map; }
    bool operator<(const VlAssocArray& rhs) const { return m_map < rhs.m_map; }
    // METHODS
    T_Value& atDefault() { return m_defaultValue; }
    const T_Value& atDefault() const { return m_defaultValue; }

    // Size of array. Verilog: function int size(), or int num()
    int size() const { return m_map.size(); }
    bool empty() const { return m_map.empty(); }
    // Clear array. Verilog: function void delete([input index])
    void clear() { m_map.clear(); }
    void erase(const T_Key& index) { m_map.erase(index); }
    // Return 0/1 if element exists. Verilog: function int exists(input index)
    int exists(const T_Key& index) const { return m_map.find(index) != m_map.end(); }
    // Return first element.  Verilog: function int first(ref index);
    int first(T_Key& indexr) const {
        const auto it = m_map.cbegin();
        if (it == m_map.end()) return 0;
        indexr = it->first;
        return 1;
    }
    // Return last element.  Verilog: function int last(ref index)
    int last(T_Key& indexr) const {
        const auto it = m_map.crbegin();
        if (it == m_map.crend()) return 0;
        indexr = it->first;
        return 1;
    }
    // Return next element. Verilog: function int next(ref index)
    int next(T_Key& indexr) const {
        auto it = m_map.find(indexr);
        if (VL_UNLIKELY(it == m_map.end())) return 0;
        ++it;
        if (VL_UNLIKELY(it == m_map.end())) return 0;
        indexr = it->first;
        return 1;
    }
    // Return prev element. Verilog: function int prev(ref index)
    int prev(T_Key& indexr) const {
        auto it = m_map.find(indexr);
        if (VL_UNLIKELY(it == m_map.end())) return 0;
        if (VL_UNLIKELY(it == m_map.begin())) return 0;
        --it;
        indexr = it->first;
        return 1;
    }
    // Setting. Verilog: assoc[index] = v
    // Can't just overload operator[] or provide a "at" reference to set,
    // because we need to be able to insert only when the value is set
    T_Value& at(const T_Key& index) {
        const auto it = m_map.find(index);
        if (it == m_map.end()) {
            std::pair<typename Map::iterator, bool> pit = m_map.emplace(index, m_defaultValue);
            return pit.first->second;
        }
        return it->second;
    }
    // Accessing. Verilog: v = assoc[index]
    const T_Value& at(const T_Key& index) const {
        const auto it = m_map.find(index);
        if (it == m_map.end()) {
            return m_defaultValue;
        } else {
            return it->second;
        }
    }
    // Setting as a chained operation
    VlAssocArray& set(const T_Key& index, const T_Value& value) {
        at(index) = value;
        return *this;
    }
    VlAssocArray& setDefault(const T_Value& value) {
        atDefault() = value;
        return *this;
    }

    // For save/restore
    const_iterator begin() const { return m_map.begin(); }
    const_iterator end() const { return m_map.end(); }

    // Methods
    VlQueue<T_Value> unique() const {
        VlQueue<T_Value> out;
        std::set<T_Value> saw;
        for (const auto& i : m_map) {
            auto it = saw.find(i.second);
            if (it == saw.end()) {
                saw.insert(it, i.second);
                out.push_back(i.second);
            }
        }
        return out;
    }
    template <typename T_Func>
    VlQueue<T_Value> unique(T_Func with_func) const {
        VlQueue<T_Value> out;
        T_Key default_key;
        using WithType = decltype(with_func(m_map.begin()->first, m_map.begin()->second));
        std::set<WithType> saw;
        for (const auto& i : m_map) {
            const auto i_mapped = with_func(default_key, i.second);
            const auto it = saw.find(i_mapped);
            if (it == saw.end()) {
                saw.insert(it, i_mapped);
                out.push_back(i.second);
            }
        }
        return out;
    }
    VlQueue<T_Key> unique_index() const {
        VlQueue<T_Key> out;
        std::set<T_Key> saw;
        for (const auto& i : m_map) {
            auto it = saw.find(i.second);
            if (it == saw.end()) {
                saw.insert(it, i.second);
                out.push_back(i.first);
            }
        }
        return out;
    }
    template <typename T_Func>
    VlQueue<T_Key> unique_index(T_Func with_func) const {
        VlQueue<T_Key> out;
        using WithType = decltype(with_func(m_map.begin()->first, m_map.begin()->second));
        std::set<WithType> saw;
        for (const auto& i : m_map) {
            const auto i_mapped = with_func(i.first, i.second);
            auto it = saw.find(i_mapped);
            if (it == saw.end()) {
                saw.insert(it, i_mapped);
                out.push_back(i.first);
            }
        }
        return out;
    }
    template <typename T_Func>
    VlQueue<T_Value> find(T_Func with_func) const {
        VlQueue<T_Value> out;
        for (const auto& i : m_map)
            if (with_func(i.first, i.second)) out.push_back(i.second);
        return out;
    }
    template <typename T_Func>
    VlQueue<T_Key> find_index(T_Func with_func) const {
        VlQueue<T_Key> out;
        for (const auto& i : m_map)
            if (with_func(i.first, i.second)) out.push_back(i.first);
        return out;
    }
    template <typename T_Func>
    VlQueue<T_Value> find_first(T_Func with_func) const {
        const auto it
            = std::find_if(m_map.cbegin(), m_map.cend(), [=](const std::pair<T_Key, T_Value>& i) {
                  return with_func(i.first, i.second);
              });
        if (it == m_map.end()) return VlQueue<T_Value>{};
        return VlQueue<T_Value>::consV(it->second);
    }
    template <typename T_Func>
    VlQueue<T_Key> find_first_index(T_Func with_func) const {
        const auto it
            = std::find_if(m_map.cbegin(), m_map.cend(), [=](const std::pair<T_Key, T_Value>& i) {
                  return with_func(i.first, i.second);
              });
        if (it == m_map.end()) return VlQueue<T_Value>{};
        return VlQueue<T_Key>::consV(it->first);
    }
    template <typename T_Func>
    VlQueue<T_Value> find_last(T_Func with_func) const {
        const auto it = std::find_if(
            m_map.crbegin(), m_map.crend(),
            [=](const std::pair<T_Key, T_Value>& i) { return with_func(i.first, i.second); });
        if (it == m_map.rend()) return VlQueue<T_Value>{};
        return VlQueue<T_Value>::consV(it->second);
    }
    template <typename T_Func>
    VlQueue<T_Key> find_last_index(T_Func with_func) const {
        const auto it = std::find_if(
            m_map.crbegin(), m_map.crend(),
            [=](const std::pair<T_Key, T_Value>& i) { return with_func(i.first, i.second); });
        if (it == m_map.rend()) return VlQueue<T_Value>{};
        return VlQueue<T_Key>::consV(it->first);
    }

    // Reduction operators
    VlQueue<T_Value> min() const {
        if (m_map.empty()) return VlQueue<T_Value>();
        const auto it = std::min_element(
            m_map.cbegin(), m_map.cend(),
            [](const std::pair<T_Key, T_Value>& a, const std::pair<T_Key, T_Value>& b) {
                return a.second < b.second;
            });
        return VlQueue<T_Value>::consV(it->second);
    }
    template <typename T_Func>
    VlQueue<T_Value> min(T_Func with_func) const {
        if (m_map.empty()) return VlQueue<T_Value>();
        const auto it = std::min_element(
            m_map.cbegin(), m_map.cend(),
            [&with_func](const std::pair<T_Key, T_Value>& a, const std::pair<T_Key, T_Value>& b) {
                return with_func(a.first, a.second) < with_func(b.first, b.second);
            });
        return VlQueue<T_Value>::consV(it->second);
    }
    VlQueue<T_Value> max() const {
        if (m_map.empty()) return VlQueue<T_Value>();
        const auto it = std::max_element(
            m_map.cbegin(), m_map.cend(),
            [](const std::pair<T_Key, T_Value>& a, const std::pair<T_Key, T_Value>& b) {
                return a.second < b.second;
            });
        return VlQueue<T_Value>::consV(it->second);
    }
    template <typename T_Func>
    VlQueue<T_Value> max(T_Func with_func) const {
        if (m_map.empty()) return VlQueue<T_Value>();
        const auto it = std::max_element(
            m_map.cbegin(), m_map.cend(),
            [&with_func](const std::pair<T_Key, T_Value>& a, const std::pair<T_Key, T_Value>& b) {
                return with_func(a.first, a.second) < with_func(b.first, b.second);
            });
        return VlQueue<T_Value>::consV(it->second);
    }

    T_Value r_sum() const {
        T_Value out(0);  // Type must have assignment operator
        for (const auto& i : m_map) out += i.second;
        return out;
    }
    template <typename T_Func>
    WithFuncReturnType<T_Func> r_sum(T_Func with_func) const {
        WithFuncReturnType<T_Func> out = WithFuncReturnType<T_Func>(0);
        for (const auto& i : m_map) out += with_func(i.first, i.second);
        return out;
    }
    T_Value r_product() const {
        if (m_map.empty()) return T_Value(0);  // The big three do it this way
        T_Value out = T_Value(1);
        for (const auto& i : m_map) out *= i.second;
        return out;
    }
    template <typename T_Func>
    WithFuncReturnType<T_Func> r_product(T_Func with_func) const {
        if (m_map.empty()) return WithFuncReturnType<T_Func>(0);  // The big three do it this way
        WithFuncReturnType<T_Func> out = WithFuncReturnType<T_Func>(1);
        for (const auto& i : m_map) out *= with_func(i.first, i.second);
        return out;
    }
    T_Value r_and() const {
        if (m_map.empty()) return T_Value(0);  // The big three do it this way
        T_Value out = ~T_Value(0);
        for (const auto& i : m_map) out &= i.second;
        return out;
    }
    template <typename T_Func>
    WithFuncReturnType<T_Func> r_and(T_Func with_func) const {
        if (m_map.empty()) return WithFuncReturnType<T_Func>(0);  // The big three do it this way
        WithFuncReturnType<T_Func> out = ~WithFuncReturnType<T_Func>(0);
        for (const auto& i : m_map) out &= with_func(i.first, i.second);
        return out;
    }
    T_Value r_or() const {
        T_Value out = T_Value(0);
        for (const auto& i : m_map) out |= i.second;
        return out;
    }
    template <typename T_Func>
    T_Value r_or(T_Func with_func) const {
        T_Value out = T_Value(0);
        for (const auto& i : m_map) out |= with_func(i.first, i.second);
        return out;
    }
    T_Value r_xor() const {
        T_Value out = T_Value(0);
        for (const auto& i : m_map) out ^= i.second;
        return out;
    }
    template <typename T_Func>
    WithFuncReturnType<T_Func> r_xor(T_Func with_func) const {
        WithFuncReturnType<T_Func> out = WithFuncReturnType<T_Func>(0);
        for (const auto& i : m_map) out ^= with_func(i.first, i.second);
        return out;
    }

    // Dumping. Verilog: str = $sformatf("%p", assoc)
    std::string to_string() const {
        if (m_map.empty()) return "'{}";  // No trailing space
        std::string out = "'{";
        std::string comma;
        for (const auto& i : m_map) {
            out += comma + VL_TO_STRING(i.first) + ":" + VL_TO_STRING(i.second);
            comma = ", ";
        }
        // Default not printed - maybe random init data
        return out + "} ";
    }
};

template <typename T_Key, typename T_Value>
std::string VL_TO_STRING(const VlAssocArray<T_Key, T_Value>& obj) {
    return obj.to_string();
}

template <typename T_Key, typename T_Value>
struct VlContainsCustomStruct<VlAssocArray<T_Key, T_Value>> : VlContainsCustomStruct<T_Value> {};

template <typename T_Key, typename T_Value>
void VL_READMEM_N(bool hex, int bits, const std::string& filename,
                  VlAssocArray<T_Key, T_Value>& obj, QData start, QData end) VL_MT_SAFE {
    VlReadMem rmem{hex, bits, filename, start, end};
    if (VL_UNLIKELY(!rmem.isOpen())) return;
    while (true) {
        QData addr;
        std::string data;
        if (rmem.get(addr /*ref*/, data /*ref*/)) {
            rmem.setData(&(obj.at(addr)), data);
        } else {
            break;
        }
    }
}

template <typename T_Key, typename T_Value>
void VL_WRITEMEM_N(bool hex, int bits, const std::string& filename,
                   const VlAssocArray<T_Key, T_Value>& obj, QData start, QData end) VL_MT_SAFE {
    VlWriteMem wmem{hex, bits, filename, start, end};
    if (VL_UNLIKELY(!wmem.isOpen())) return;
    for (const auto& i : obj) {
        const QData addr = i.first;
        if (addr >= start && addr <= end) wmem.print(addr, true, &(i.second));
    }
}

//===================================================================
/// Verilog unpacked array container
/// For when a standard C++[] array is not sufficient, e.g. an
/// array under a queue, or methods operating on the array.
///
/// A 'struct' as we want this to be an aggregate type that allows
/// static aggregate initialization. Consider data members private.
///
/// This class may get exposed to a Verilated Model's top I/O, if the top
/// IO has an unpacked array.

template <typename T_Value, std::size_t N_Depth>
class VlUnpacked final {
    // TYPES
    using T_Key = IData;  // Index type, for uniformity with other containers
    using Unpacked = T_Value[N_Depth];

public:
    // MEMBERS
    // This should be the only data member, otherwise generated static initializers need updating
    Unpacked m_storage;  // Contents of the unpacked array

    // CONSTRUCTORS
    // Default constructors and destructor are used. Note however that C++20 requires that
    // aggregate types do not have a user declared constructor, not even an explicitly defaulted
    // one.

    // OPERATOR METHODS
    // Default copy assignment operators are used.

    // METHODS
public:
    // Raw access
    WData* data() { return &m_storage[0]; }
    const WData* data() const { return &m_storage[0]; }

    constexpr std::size_t size() const { return N_Depth; }

    void fill(const T_Value& value) {
        std::fill(std::begin(m_storage), std::end(m_storage), value);
    }

    // To fit C++14
    template <std::size_t N_CurrentDimension = 0, typename U = T_Value>
    int find_length(int dimension, std::false_type) const {
        return size();
    }

    template <std::size_t N_CurrentDimension = 0, typename U = T_Value>
    int find_length(int dimension, std::true_type) const {
        if (dimension == N_CurrentDimension) {
            return size();
        } else {
            return m_storage[0].template find_length<N_CurrentDimension + 1>(dimension);
        }
    }

    template <std::size_t N_CurrentDimension = 0>
    int find_length(int dimension) const {
        return find_length<N_CurrentDimension>(dimension, std::is_class<T_Value>{});
    }

    template <std::size_t N_CurrentDimension = 0, typename U = T_Value>
    auto& find_element(const std::vector<size_t>& indices, std::false_type) {
        return m_storage[indices[N_CurrentDimension]];
    }

    template <std::size_t N_CurrentDimension = 0, typename U = T_Value>
    auto& find_element(const std::vector<size_t>& indices, std::true_type) {
        return m_storage[indices[N_CurrentDimension]]
            .template find_element<N_CurrentDimension + 1>(indices);
    }

    template <std::size_t N_CurrentDimension = 0>
    auto& find_element(const std::vector<size_t>& indices) {
        return find_element<N_CurrentDimension>(indices, std::is_class<T_Value>{});
    }

    T_Value& operator[](size_t index) { return m_storage[index]; }
    constexpr const T_Value& operator[](size_t index) const { return m_storage[index]; }

    // *this != that, which might be used for change detection/trigger computation, but avoid
    // operator overloading in VlUnpacked for safety in other contexts.
    bool neq(const VlUnpacked<T_Value, N_Depth>& that) const { return neq(*this, that); }
    // Similar to 'neq' above, *this = that used for change detection
    void assign(const VlUnpacked<T_Value, N_Depth>& that) { *this = that; }
    bool operator==(const VlUnpacked<T_Value, N_Depth>& that) const { return !neq(that); }
    bool operator!=(const VlUnpacked<T_Value, N_Depth>& that) const { return neq(that); }
    // interface to C style arrays (used in ports), see issue #5125
    bool neq(const T_Value that[N_Depth]) const { return neq(*this, that); }
    void assign(const T_Value that[N_Depth]) { std::copy_n(that, N_Depth, m_storage); }
    void operator=(const T_Value that[N_Depth]) { assign(that); }
    bool operator<(const VlUnpacked<T_Value, N_Depth>& that) const {
        for (int index = 0; index < N_Depth; ++index) {
            if (m_storage[index] < that.m_storage[index]) return true;
        }
        return false;
    }

    // inside (set membership operator)
    bool inside(const T_Value& value) const {
        return std::find(std::begin(m_storage), std::end(m_storage), value) != std::end(m_storage);
    }

    void sort() { std::sort(std::begin(m_storage), std::end(m_storage)); }
    template <typename T_Func>
    void sort(T_Func with_func) {
        // with_func returns arbitrary type to use for the sort comparison
        std::sort(std::begin(m_storage), std::end(m_storage),
                  [=](const T_Value& a, const T_Value& b) {
                      // index number is meaningless with sort, as it changes
                      return with_func(0, a) < with_func(0, b);
                  });
    }
    // std::rbegin/std::rend not available until C++14
    void rsort() {
        std::sort(std::begin(m_storage), std::end(m_storage), std::greater<T_Value>());
    }
    template <typename T_Func>
    void rsort(T_Func with_func) {
        // with_func returns arbitrary type to use for the sort comparison
        // std::rbegin/std::rend not available until C++14, so using > below
        std::sort(std::begin(m_storage), std::end(m_storage),
                  [=](const T_Value& a, const T_Value& b) {
                      // index number is meaningless with sort, as it changes
                      return with_func(0, a) > with_func(0, b);
                  });
    }
    void reverse() { std::reverse(std::begin(m_storage), std::end(m_storage)); }
    void shuffle() { std::shuffle(std::begin(m_storage), std::end(m_storage), VlURNG{}); }
    VlQueue<T_Value> unique() const {
        VlQueue<T_Value> out;
        std::set<T_Value> saw;
        for (const auto& i : m_storage) {
            const auto it = saw.find(i);
            if (it == saw.end()) {
                saw.insert(it, i);
                out.push_back(i);
            }
        }
        return out;
    }
    template <typename T_Func>
    VlQueue<T_Value> unique(T_Func with_func) const {
        VlQueue<T_Value> out;
        std::set<T_Value> saw;
        for (const auto& i : m_storage) {
            const auto i_mapped = with_func(0, i);
            const auto it = saw.find(i_mapped);
            if (it == saw.end()) {
                saw.insert(it, i_mapped);
                out.push_back(i);
            }
        }
        return out;
    }
    VlQueue<T_Key> unique_index() const {
        VlQueue<T_Key> out;
        IData index = 0;
        std::set<T_Value> saw;
        for (const auto& i : m_storage) {
            const auto it = saw.find(i);
            if (it == saw.end()) {
                saw.insert(it, i);
                out.push_back(index);
            }
            ++index;
        }
        return out;
    }
    template <typename T_Func>
    VlQueue<T_Key> unique_index(T_Func with_func) const {
        VlQueue<T_Key> out;
        IData index = 0;
        std::set<T_Value> saw;
        for (const auto& i : m_storage) {
            const auto i_mapped = with_func(index, i);
            auto it = saw.find(i_mapped);
            if (it == saw.end()) {
                saw.insert(it, i_mapped);
                out.push_back(index);
            }
            ++index;
        }
        return out;
    }
    template <typename T_Func>
    VlQueue<T_Value> find(T_Func with_func) const {
        VlQueue<T_Value> out;
        IData index = 0;
        for (const auto& i : m_storage) {
            if (with_func(index, i)) out.push_back(i);
            ++index;
        }
        return out;
    }
    template <typename T_Func>
    VlQueue<T_Key> find_index(T_Func with_func) const {
        VlQueue<T_Key> out;
        IData index = 0;
        for (const auto& i : m_storage) {
            if (with_func(index, i)) out.push_back(index);
            ++index;
        }
        return out;
    }
    template <typename T_Func>
    VlQueue<T_Value> find_first(T_Func with_func) const {
        // Can't use std::find_if as need index number
        IData index = 0;
        for (const auto& i : m_storage) {
            if (with_func(index, i)) return VlQueue<T_Value>::consV(i);
            ++index;
        }
        return VlQueue<T_Value>{};
    }
    template <typename T_Func>
    VlQueue<T_Key> find_first_index(T_Func with_func) const {
        IData index = 0;
        for (const auto& i : m_storage) {
            if (with_func(index, i)) return VlQueue<IData>::consV(index);
            ++index;
        }
        return VlQueue<T_Key>{};
    }
    template <typename T_Func>
    VlQueue<T_Value> find_last(T_Func with_func) const {
        for (int i = N_Depth - 1; i >= 0; i--) {
            if (with_func(i, m_storage[i])) return VlQueue<T_Value>::consV(m_storage[i]);
        }
        return VlQueue<T_Value>{};
    }
    template <typename T_Func>
    VlQueue<T_Key> find_last_index(T_Func with_func) const {
        for (int i = N_Depth - 1; i >= 0; i--) {
            if (with_func(i, m_storage[i])) return VlQueue<IData>::consV(i);
        }
        return VlQueue<T_Key>{};
    }

    // Reduction operators
    VlQueue<T_Value> min() const {
        const auto it = std::min_element(std::begin(m_storage), std::end(m_storage));
        return VlQueue<T_Value>::consV(*it);
    }
    template <typename T_Func>
    VlQueue<T_Value> min(T_Func with_func) const {
        const auto it = std::min_element(std::begin(m_storage), std::end(m_storage),
                                         [&with_func](const IData& a, const IData& b) {
                                             return with_func(0, a) < with_func(0, b);
                                         });
        return VlQueue<T_Value>::consV(*it);
    }
    VlQueue<T_Value> max() const {
        const auto it = std::max_element(std::begin(m_storage), std::end(m_storage));
        return VlQueue<T_Value>::consV(*it);
    }
    template <typename T_Func>
    VlQueue<T_Value> max(T_Func with_func) const {
        const auto it = std::max_element(std::begin(m_storage), std::end(m_storage),
                                         [&with_func](const IData& a, const IData& b) {
                                             return with_func(0, a) < with_func(0, b);
                                         });
        return VlQueue<T_Value>::consV(*it);
    }

    // Dumping. Verilog: str = $sformatf("%p", assoc)
    std::string to_string() const {
        std::string out = "'{";
        std::string comma;
        for (int i = 0; i < N_Depth; ++i) {
            out += comma + VL_TO_STRING(m_storage[i]);
            comma = ", ";
        }
        return out + "} ";
    }

private:
    template <typename T_Val, std::size_t N_Dep>
    static bool neq(const VlUnpacked<T_Val, N_Dep>& a, const VlUnpacked<T_Val, N_Dep>& b) {
        for (size_t i = 0; i < N_Dep; ++i) {
            // Recursive 'neq', in case T_Val is also a VlUnpacked<_, _>
            if (neq(a.m_storage[i], b.m_storage[i])) return true;
        }
        return false;
    }

    template <typename T_Val, std::size_t N_Dep>
    static bool neq(const VlUnpacked<T_Val, N_Dep>& a, const T_Val b[N_Dep]) {
        for (size_t i = 0; i < N_Dep; ++i) {
            // Recursive 'neq', in case T_Val is also a VlUnpacked<_, _>
            if (neq(a.m_storage[i], b[i])) return true;
        }
        return false;
    }

    template <typename T_Other>  //
    static bool neq(const T_Other& a, const T_Other& b) {
        // Base case (T_Other is not VlUnpacked<_, _>), fall back on !=
        return a != b;
    }
};

template <typename T_Value, std::size_t N_Depth>
std::string VL_TO_STRING(const VlUnpacked<T_Value, N_Depth>& obj) {
    return obj.to_string();
}

template <typename T_Value, std::size_t N_Depth>
struct VlContainsCustomStruct<VlUnpacked<T_Value, N_Depth>> : VlContainsCustomStruct<T_Value> {};

//===================================================================
// Helper to apply the given indices to a target expression

template <size_t N_Curr, size_t N_Rank, typename T_Target>
struct VlApplyIndices final {
    VL_ATTR_ALWINLINE
    static auto& apply(T_Target& target, const size_t* indicesp) {
        return VlApplyIndices<N_Curr + 1, N_Rank, decltype(target[indicesp[N_Curr]])>::apply(
            target[indicesp[N_Curr]], indicesp);
    }
};

template <size_t N_Rank, typename T_Target>
struct VlApplyIndices<N_Rank, N_Rank, T_Target> final {
    VL_ATTR_ALWINLINE
    static T_Target& apply(T_Target& target, const size_t*) { return target; }
};

//===================================================================
// Commit queue for NBAs - currently only for unpacked arrays
//
// This data-structure is used to handle non-blocking assignments
// that might execute a variable number of times in a single
// evaluation. It has 2 operations:
// - 'enqueue' will add an update to the queue
// - 'commit' will apply all enqueued updates to the target variable,
//   in the order they were enqueued. This ensures the last NBA
//   takes effect as it is expected.
// There are 2 specializations of this class below:
// - A version when a partial element update is not required,
//   e.g, to handle:
//      logic [31:0] array[N];
//      for (int i = 0 ; i < N ; ++i) array[i] <= x;
//   Here 'enqueue' takes the RHS ('x'), and the array indices ('i')
//   as arguments.
// - A different version when a partial element update is required,
//   e.g. for:
//      logic [31:0] array[N];
//      for (int i = 0 ; i < N ; ++i) array[i][3:1] <= y;
//   Here 'enqueue' takes one additional argument, which is a bitmask
//   derived from the bit selects (_[3:1]), which masks the bits that
//   need to be updated, and additionally the RHS is widened to a full
//   element size, with the bits inserted into the masked region.
template <typename T_Target,  // Type of the variable this commit queue updates
          bool Partial,  // Whether partial element updates are necessary
          // The following we could figure out from 'T_Target using type traits, but passing
          // explicitly to avoid template expansion, as Verilator already knows them
          typename T_Element,  // Non-array leaf element type of T_Target array
          std::size_t N_Rank  // Rank of T_Target (i.e.: how many dimensions it has)
          >
class VlNBACommitQueue;

// Specialization for whole element updates only
template <typename T_Target, typename T_Element, std::size_t N_Rank>
class VlNBACommitQueue<T_Target, /* Partial: */ false, T_Element, N_Rank> final {
    // TYPES
    struct Entry final {
        T_Element value;
        size_t indices[N_Rank];
    };

    // STATE
    std::vector<Entry> m_pending;  // Pending updates, in program order

public:
    // CONSTRUCTOR
    VlNBACommitQueue() = default;
    VL_UNCOPYABLE(VlNBACommitQueue);

    // METHODS
    template <typename... T_Args>
    void enqueue(const T_Element& value, T_Args... indices) {
        m_pending.emplace_back(Entry{value, {indices...}});
    }

    // Note: T_Commit might be different from T_Target. Specifically, when the signal is a
    // top-level IO port, T_Commit will be a native C array, while T_Target, will be a VlUnpacked
    template <typename T_Commit>
    void commit(T_Commit& target) {
        if (m_pending.empty()) return;
        for (const Entry& entry : m_pending) {
            VlApplyIndices<0, N_Rank, T_Commit>::apply(target, entry.indices) = entry.value;
        }
        m_pending.clear();
    }
};

// With partial element updates
template <typename T_Target, typename T_Element, std::size_t N_Rank>
class VlNBACommitQueue<T_Target, /* Partial: */ true, T_Element, N_Rank> final {
    // TYPES
    struct Entry final {
        T_Element value;
        T_Element mask;
        size_t indices[N_Rank];
    };

    // STATE
    std::vector<Entry> m_pending;  // Pending updates, in program order

    // STATIC METHODS

    // Binary & | ~ for elements to use for masking in partial updates. Sorry for the templates.
    template <typename T>
    VL_ATTR_ALWINLINE static typename std::enable_if<!VlIsVlWide<T>::value, T>::type
    bAnd(const T& a, const T& b) {
        return a & b;
    }

    template <typename T>
    VL_ATTR_ALWINLINE static typename std::enable_if<VlIsVlWide<T>::value, T>::type
    bAnd(const T& a, const T& b) {
        T result;
        for (size_t i = 0; i < T::Words; ++i) {
            result.m_storage[i] = a.m_storage[i] & b.m_storage[i];
        }
        return result;
    }

    template <typename T>
    VL_ATTR_ALWINLINE static typename std::enable_if<!VlIsVlWide<T>::value, T>::type
    bOr(const T& a, const T& b) {
        return a | b;
    }

    template <typename T>
    VL_ATTR_ALWINLINE static typename std::enable_if<VlIsVlWide<T>::value, T>::type  //
    bOr(const T& a, const T& b) {
        T result;
        for (size_t i = 0; i < T::Words; ++i) {
            result.m_storage[i] = a.m_storage[i] | b.m_storage[i];
        }
        return result;
    }

    template <typename T>
    VL_ATTR_ALWINLINE static typename std::enable_if<!VlIsVlWide<T>::value, T>::type
    bNot(const T& a) {
        return ~a;
    }

    template <typename T>
    VL_ATTR_ALWINLINE static typename std::enable_if<VlIsVlWide<T>::value, T>::type
    bNot(const T& a) {
        T result;
        for (size_t i = 0; i < T::Words; ++i) result.m_storage[i] = ~a.m_storage[i];
        return result;
    }

public:
    // CONSTRUCTOR
    VlNBACommitQueue() = default;
    VL_UNCOPYABLE(VlNBACommitQueue);

    // METHODS
    template <typename... T_Args>
    void enqueue(const T_Element& value, const T_Element& mask, T_Args... indices) {
        m_pending.emplace_back(Entry{value, mask, {indices...}});
    }

    // Note: T_Commit might be different from T_Target. Specifically, when the signal is a
    // top-level IO port, T_Commit will be a native C array, while T_Target, will be a VlUnpacked
    template <typename T_Commit>
    void commit(T_Commit& target) {
        if (m_pending.empty()) return;
        for (const Entry& entry : m_pending) {  //
            auto& ref = VlApplyIndices<0, N_Rank, T_Commit>::apply(target, entry.indices);
            // Maybe inefficient, but it works for now ...
            const auto oldValue = ref;
            ref = bOr(bAnd(entry.value, entry.mask), bAnd(oldValue, bNot(entry.mask)));
        }
        m_pending.clear();
    }
};

//===================================================================
// Object that VlDeleter is capable of deleting

class VlDeletable VL_NOT_FINAL {
public:
    VlDeletable() = default;
    virtual ~VlDeletable() = default;
};

//===================================================================
// Class providing delayed deletion of garbage objects. Objects get deleted only when 'deleteAll()'
// is called, or the deleter itself is destroyed.

class VlDeleter final {
    // MEMBERS
    // Queue of new objects that should be deleted
    std::vector<VlDeletable*> m_newGarbage VL_GUARDED_BY(m_mutex);
    // Queue of objects currently being deleted (only for deleteAll())
    std::vector<VlDeletable*> m_deleteNow VL_GUARDED_BY(m_deleteMutex);
    mutable VerilatedMutex m_mutex;  // Mutex protecting the 'new garbage' queue
    mutable VerilatedMutex m_deleteMutex;  // Mutex protecting the delete queue

public:
    // CONSTRUCTOR
    VlDeleter() = default;
    ~VlDeleter() { deleteAll(); }

private:
    VL_UNCOPYABLE(VlDeleter);

public:
    // METHODS
    // Adds a new object to the 'new garbage' queue.
    void put(VlDeletable* const objp) VL_MT_SAFE {
        const VerilatedLockGuard lock{m_mutex};
        m_newGarbage.push_back(objp);
    }

    // Deletes all queued garbage objects.
    void deleteAll() VL_EXCLUDES(m_mutex) VL_EXCLUDES(m_deleteMutex) VL_MT_SAFE;
};

//===================================================================
// Base class for all verilated classes. Includes a reference counter, and a pointer to the deleter
// object that should destroy it after the counter reaches 0. This allows for easy construction of
// VlClassRefs from 'this'.

class VlClass VL_NOT_FINAL : public VlDeletable {
    // TYPES
    template <typename T_Class>
    friend class VlClassRef;  // Needed for access to the ref counter and deleter

    // MEMBERS
    std::atomic<size_t> m_counter{1};  // Reference count for this object
    VlDeleter* m_deleterp = nullptr;  // The deleter that will delete this object

    // METHODS
    // Atomically increments the reference counter
    void refCountInc() VL_MT_SAFE {
        VL_DEBUG_IFDEF(assert(m_counter););  // If zero, we might have already deleted
        ++m_counter;
    }
    // Atomically decrements the reference counter. Assuming VlClassRef semantics are sound, it
    // should never get called at m_counter == 0.
    void refCountDec() VL_MT_SAFE {
        if (!--m_counter) m_deleterp->put(this);
    }

public:
    // CONSTRUCTORS
    VlClass() {}
    VlClass(const VlClass& copied) {}
    ~VlClass() override = default;
};

//===================================================================
// Represents the null pointer. Used for:
// * setting VlClassRef to null instead of via nullptr_t, to prevent the implicit conversion of 0
//   to nullptr,
// * comparing interface pointers to null.

struct VlNull final {
    operator bool() const { return false; }
    bool operator==(const void* ptr) const { return !ptr; }
};
inline bool operator==(const void* ptr, VlNull) { return !ptr; }

//===================================================================
// Verilog class reference container
// There are no multithreaded locks on this; the base variable must
// be protected by other means

template <typename T_Class>
class VlClassRef final {
private:
    // TYPES
    template <typename T_OtherClass>
    friend class VlClassRef;  // Needed for template copy/move assignments

    // MEMBERS
    T_Class* m_objp = nullptr;  // Object pointed to

    // METHODS
    // Increase reference counter with null check
    void refCountInc() const VL_MT_SAFE {
        if (m_objp) m_objp->refCountInc();
    }
    // Decrease reference counter with null check
    void refCountDec() const VL_MT_SAFE {
        if (m_objp) m_objp->refCountDec();
    }

public:
    // CONSTRUCTORS
    VlClassRef() = default;
    // Init with nullptr
    // cppcheck-suppress noExplicitConstructor
    VlClassRef(VlNull){};
    template <typename... T_Args>
    VlClassRef(VlDeleter& deleter, T_Args&&... args)
        // () required here to avoid narrowing conversion warnings,
        // when a new() has an e.g. CData type and passed a 1U.
        : m_objp{new T_Class(std::forward<T_Args>(args)...)} {
        // refCountInc was moved to the constructor of T_Class
        // to fix self references in constructor.
        m_objp->m_deleterp = &deleter;
    }
    // Explicit to avoid implicit conversion from 0
    explicit VlClassRef(T_Class* objp)
        : m_objp{objp} {
        refCountInc();
    }
    // cppcheck-suppress noExplicitConstructor
    VlClassRef(const VlClassRef& copied)
        : m_objp{copied.m_objp} {
        refCountInc();
    }
    // cppcheck-suppress noExplicitConstructor
    VlClassRef(VlClassRef&& moved)
        : m_objp{std::exchange(moved.m_objp, nullptr)} {}
    // cppcheck-suppress noExplicitConstructor
    template <typename T_OtherClass>
    VlClassRef(const VlClassRef<T_OtherClass>& copied)
        : m_objp{copied.m_objp} {
        refCountInc();
    }
    // cppcheck-suppress noExplicitConstructor
    template <typename T_OtherClass>
    VlClassRef(VlClassRef<T_OtherClass>&& moved)
        : m_objp{std::exchange(moved.m_objp, nullptr)} {}
    ~VlClassRef() { refCountDec(); }

    // METHODS
    // Copy and move assignments
    VlClassRef& operator=(const VlClassRef& copied) {
        if (m_objp == copied.m_objp) return *this;
        refCountDec();
        m_objp = copied.m_objp;
        refCountInc();
        return *this;
    }
    VlClassRef& operator=(VlClassRef&& moved) {
        if (m_objp == moved.m_objp) return *this;
        refCountDec();
        m_objp = std::exchange(moved.m_objp, nullptr);
        return *this;
    }
    template <typename T_OtherClass>
    VlClassRef& operator=(const VlClassRef<T_OtherClass>& copied) {
        if (m_objp == copied.m_objp) return *this;
        refCountDec();
        m_objp = copied.m_objp;
        refCountInc();
        return *this;
    }
    template <typename T_OtherClass>
    VlClassRef& operator=(VlClassRef<T_OtherClass>&& moved) {
        if (m_objp == moved.m_objp) return *this;
        refCountDec();
        m_objp = std::exchange(moved.m_objp, nullptr);
        return *this;
    }
    // Assign with nullptr
    VlClassRef& operator=(VlNull) {
        refCountDec();
        m_objp = nullptr;
        return *this;
    }
    // Dynamic caster
    template <typename T_OtherClass>
    VlClassRef<T_OtherClass> dynamicCast() const {
        return VlClassRef<T_OtherClass>{dynamic_cast<T_OtherClass*>(m_objp)};
    }
    // Dereference operators
    T_Class& operator*() const { return *m_objp; }
    T_Class* operator->() const { return m_objp; }
    // For 'if (ptr)...'
    operator bool() const { return m_objp; }
    // In SV A == B iff both are handles to the same object (IEEE 1800-2023 8.4)
    template <typename T_OtherClass>
    bool operator==(const VlClassRef<T_OtherClass>& rhs) const {
        return m_objp == rhs.m_objp;
    };
    template <typename T_OtherClass>
    bool operator!=(const VlClassRef<T_OtherClass>& rhs) const {
        return m_objp != rhs.m_objp;
    };
    template <typename T_OtherClass>
    bool operator<(const VlClassRef<T_OtherClass>& rhs) const {
        return m_objp < rhs.m_objp;
    };
};

template <typename T_Lhs, typename T_Out>
static inline bool VL_CAST_DYNAMIC(VlClassRef<T_Lhs> in, VlClassRef<T_Out>& outr) {
    if (!in) {
        outr = VlNull{};
        return true;
    }
    VlClassRef<T_Out> casted = in.template dynamicCast<T_Out>();
    if (VL_LIKELY(casted)) {
        outr = casted;
        return true;
    } else {
        return false;
    }
}

template <typename T_Lhs>
static inline bool VL_CAST_DYNAMIC(VlNull in, VlClassRef<T_Lhs>& outr) {
    outr = VlNull{};
    return true;
}

//=============================================================================
// VlSampleQueue stores samples for input clockvars in clocking blocks. At a clocking event,
// samples from this queue should be written to the correct input clockvar.

template <typename T_Sampled>
class VlSampleQueue final {
    // TYPES
    // Type representing a single value sample at a point in time
    struct VlSample final {
        uint64_t m_timestamp;  // Timestamp at which the value was sampled
        T_Sampled m_value;  // The sampled value
    };

    // MEMBERS
    std::deque<VlSample> m_queue;  // Queue of samples with timestamps

public:
    // METHODS
    // Push a new sample with the given timestamp to the end of the queue
    void push(uint64_t time, const T_Sampled& value) { m_queue.push_back({time, value}); }
    // Get the latest sample with its timestamp less than or equal to the given skew
    void pop(uint64_t time, uint64_t skew, T_Sampled& value) {
        if (time < skew) return;
        // Find the last element not greater than (time - skew). Do a binary search, as the queue
        // should be ordered.
        auto it = std::lower_bound(m_queue.rbegin(), m_queue.rend(), VlSample{time - skew, {}},
                                   [](const VlSample& sample, const VlSample& skewed) {
                                       return sample.m_timestamp > skewed.m_timestamp;
                                   });
        if (it != m_queue.rend()) {
            value = it->m_value;
            m_queue.erase(m_queue.begin(), it.base());
        }
    }
};

//======================================================================

#define VL_NEW(Class, ...) \
    VlClassRef<Class> { vlSymsp->__Vm_deleter, __VA_ARGS__ }

#define VL_KEEP_THIS \
    VlClassRef<std::remove_pointer<decltype(this)>::type> __Vthisref { this }

template <typename T>  // T typically of type VlClassRef<x>
inline T VL_NULL_CHECK(T t, const char* filename, int linenum) {
    if (VL_UNLIKELY(!t)) Verilated::nullPointerError(filename, linenum);
    return t;
}

//======================================================================

#endif  // Guard
