Amazing :) I did not know that you could access lambda capture expressions. This can indeed reproduce parts of iod's features. However, this syntax does not provides static introspection, and does not support nesting properly :

auto obj = [ name = 1, a = [name = 1]{} ]{}; obj.a.name;

test.cc: In function ‘int main()’: test.cc:5:38: warning: already captured ‘name’ in lambda expression auto obj = [ name = 1, a = [name = 1]{} ]{}; ^ test.cc:7:9: error: ‘struct main()::<lambda()>’ has no member named ‘name’ obj.a.name;