I wrote a simple debug visualizer for boost::variant and I want to share it with community. boost::variant<*,*,*,*,*,*,*,*,*,*,*> { preview ( #( #switch($c.which_) #case 0 ( *($T1 *)&($c.storage_.data_) ) #case 1 ( *($T2 *)&($c.storage_.data_) ) #case 2 ( *($T3 *)&($c.storage_.data_) ) #case 3 ( *($T4 *)&($c.storage_.data_) ) #case 4 ( *($T5 *)&($c.storage_.data_) ) #case 5 ( *($T6 *)&($c.storage_.data_) ) #case 6 ( *($T7 *)&($c.storage_.data_) ) #case 7 ( *($T8 *)&($c.storage_.data_) ) #case 8 ( *($T9 *)&($c.storage_.data_) ) #case 9 ( *($T10 *)&($c.storage_.data_) ) ) ) children ( #( value: #switch($c.which_) #case 0 ( *($T1 *)&($c.storage_.data_) ) #case 1 ( *($T2 *)&($c.storage_.data_) ) #case 2 ( *($T3 *)&($c.storage_.data_) ) #case 3 ( *($T4 *)&($c.storage_.data_) ) #case 4 ( *($T5 *)&($c.storage_.data_) ) #case 5 ( *($T6 *)&($c.storage_.data_) ) #case 6 ( *($T7 *)&($c.storage_.data_) ) #case 7 ( *($T8 *)&($c.storage_.data_) ) #case 8 ( *($T9 *)&($c.storage_.data_) ) #case 9 ( *($T10 *)&($c.storage_.data_) ) ) ) }