static if and templates

[Oliver]

Christian and Don,

thanks for you help. Here is what i do now.
1) it is modular
2) is dose not need the clumsy yx!() notation.

thanks again,
oliver

-----------
import std.stdio;

bool isIndexed(T)(T) {
    return is( typeof(T[0]) );
}

bool isDoubleIndexed(T)(T) {
    return is( typeof(T[0][0]) );
}

bool isSliced(T)(T) {
    return is( typeof(T[0..0]) );
}

bool isArray(T)(T expr) {
    return isIndexed(expr);
}

bool isMatrix(T)(T expr) {
    return isIndexed(expr) && isDoubleIndexed(expr);
}

bool isBlubb(T)(T expr) {
    return !isMatrix(expr);
}

void main () {
    double s = 1.;
    double[] v = [1.,2.];
    double[][] m = [[1.,2.]];

    writefln("s: ", isArray(s), " ", isMatrix(s) );
    writefln("v: ", isArray(v), " ", isMatrix(v) );
    writefln("m: ", isArray(m), " ", isMatrix(m) );
    writefln("b: ", isBlubb(v), " ", isBlubb(m) );
}