Function pushTree

source/MRViewer/MRUITestEngine.cpp:241–261

}

void pushTree( std::string_view name )
{
    #if MR_ENABLE_UI_TEST_ENGINE
    checkForNewFrame();

    auto& map = state.stack.back()->elems;
    auto iter = map.find( name ); // I wish I could use `std::try_emplace` here directly...
    if ( iter == map.end() )
        iter = map.try_emplace( std::string( name ) ).first;
    else
        assert( !iter->second.visitedOnThisFrame && "Registering the same entry more than once in a single frame!" );

    GroupEntry* subgroup = std::get_if<GroupEntry>( &iter->second.value );
    if ( !subgroup )
        subgroup = &iter->second.value.emplace<GroupEntry>();

    iter->second.visitedOnThisFrame = true;

    state.stack.push_back( subgroup );
    #endif
}

void popTree()
{