ouble d; };
struct nested { int x; struct foo y; };
]]

ffi.new("int[3]", {})            --> 0, 0, 0
ffi.new("int[3]", {1})           --> 1, 1, 1
ffi.new("int[3]", {1,2})         --> 1, 2, 0
ffi.new("int[3]", {1,2,3})       --> 1, 2, 3
ffi.new("int[3]", {[0]=1})       --> 1, 1, 1
ffi.new("int[3]", {[0]=1,2})     --> 1, 2, 0
ffi.new("int[3]", {[0]=1,2,3})   --> 1, 2, 3
ffi.new("int[3]", {[0]=1,2,3,4}) --> error: too many initializers

ffi.new("struct foo", {})            --> a = 0, b = 0
ffi.new("struct foo"