Method GetByKey

tutorials/common/imgui/imgui_internal.h:659–659

    ImPool()    { FreeIdx = AliveCount = 0; }
    ~ImPool()   { Clear(); }
    T*          GetByKey(ImGuiID key)               { int idx = Map.GetInt(key, -1); return (idx != -1) ? &Buf[idx] : NULL; }
    T*          GetByIndex(ImPoolIdx n)             { return &Buf[n]; }
    ImPoolIdx   GetIndex(const T* p) const          { IM_ASSERT(p >= Buf.Data && p < Buf.Data + Buf.Size); return (ImPoolIdx)(p - Buf.Data); }
    T*          GetOrAddByKey(ImGuiID key)          { int* p_idx = Map.GetIntRef(key, -1); if (*p_idx != -1) return &Buf[*p_idx]; *p_idx = FreeIdx; return Add(); }