newNumProp
newNumProp(node, "bit-size", sym->bit_size);
newNumProp(node, "alignment", sym->ctype.alignment);
newNumProp(node, "offset", sym->offset);
newNumProp(node, "bit-offset", sym->bit_offset);
newNumProp(child, "array-size", array_size);
newNumProp(node, "start-line", sym->pos.line);
newNumProp(node, "start-col", sym->pos.pos);
newNumProp(node, "end-line", sym->endpos.line);
newNumProp(node, "end-col", sym->endpos.pos);