import std.stdio ;

// directly assign a constant
struct R {
	float[3][3] x = [[0.0F, 0.0F, 0.0F],[0.0F, 0.0F, 0.0F],[0.0F, 0.0F, 0.0F]] ;
}

// use template
template ZH(int M, T, T value) {
	static if (M == 1)
		const T[M] ZH= [value] ;
	else
		const T[M] ZH= cast(T[M])(ZH!(M - 1, T, value) ~ value)  ;
}

template ZV(alias zh, int N) {
	static if (N == 1)
		const typeof(zh)[N] ZV = [zh];
	else
		const typeof(zh)[N] ZV = cast(typeof(zh)[N])(ZV!(zh, N - 1) ~ zh) ;
}

template Zero(int M, int N, T, T value) {
	const float[M][N] Zero = ZV!(ZH!(M, T, value), N);
}

struct S {
	float[4][3] x = Zero!(4,3, float, 0.0F);
}

void main() {
	S s ;
	R r ;
	writefln("%s", s ) ;
	writefln("%s", r ) ;
}

// output : 
//   S([[0 0 0 0] [0 0 0 0] [0 0 0 0]])
//   R([[0 0 0] [0 0 0] [0 0 0]])