View Compilation Error

0_0_37740051_15348.cpp: In function 'void SegmentTree::build(int, int, int)':
0_0_37740051_15348.cpp:114:18: error: no match for 'operator=' (operand types are 'SegmentTree::node' and '<brace-enclosed initializer list>')
             t[k] = { l, r };
                  ^
0_0_37740051_15348.cpp:114:18: note: candidates are:
0_0_37740051_15348.cpp:61:12: note: SegmentTree::node& SegmentTree::node::operator=(const SegmentTree::node&)
     struct node //设计线段树节点
            ^
0_0_37740051_15348.cpp:61:12: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'const SegmentTree::node&'
0_0_37740051_15348.cpp:61:12: note: SegmentTree::node& SegmentTree::node::operator=(SegmentTree::node&&)
0_0_37740051_15348.cpp:61:12: note:   no known conversion for argument 1 from '<brace-enclosed initializer list>' to 'SegmentTree::node&&'