why no implicit convertion?

[div0]

On 17/11/2010 21:10, Matthias Pleh wrote:
> void foo(char[] a) {}
> void bar(char[][] b) {}
>
> int main(string[] args)
> {
> char[4] a;
> char[4][4] b;
> foo(a); // OK: implicit convertion
> bar(b); // Error: cannot implicitly convert
> // char[4u][4u] to char[][]
> }
>
> what is the reason for the different behaviour?
> What's best to pass such multidimensional arrays?

Check the bit about rectangular arrays:

http://digitalmars.com/d/2.0/arrays.html

b is a static array so gets optimised to a dense array which isn't 
compatible with bar. well assuming the docs are up to date.
Seems like a poor choice, dense arrays should be explicit.

You can't pass a dense array to a func unless all but the last 
dimensions match:

void bar(char[4][] b) {
}

void car(char[10][4][] c) {
}

void main() {
	char[4][4]	b;
	bar(b);

	char[10][4][2]	c;
	car(c);
}

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