For some reason i think DM 1.0 is slowly dieing as i see tons of new features in D 2.0's phobos not implemented in D 1.0  so im trying to migrate to D2.0

my 1st problem is when i compile code:

	bool open(char[] fn, char[] mode="rb")
	{
		filename=fn.dup;
		file = fopen(toStringz(filename), toStringz(mode));
		if (!file) return false;
		return true;
	}

i receive error:

>> cannot implicitly convert expression ("rb") of type invariant(char[2u]) to char[]|
can anyone help here. thanks in advance.

On Wed, 19 Nov 2008 22:10:50 -0500, MikeRJ wrote:

> For some reason i think DM 1.0 is slowly dieing as i see tons of new features in D 2.0's phobos not implemented in D 1.0  so im trying to migrate to D2.0
> 
> my 1st problem is when i compile code:
> 
> 	bool open(char[] fn, char[] mode="rb") {
> 		filename=fn.dup;
> 		file = fopen(toStringz(filename), toStringz(mode)); if (!
file) return
> 		false;
> 		return true;
> 	}
> 
> i receive error:
> 
>>> cannot implicitly convert expression ("rb") of type
>>> invariant(char[2u]) to char[]|
> can anyone help here. thanks in advance.

 	bool open(char[] fn, char[] mode="rb".dup) {

will probably make it compile, but since you are using D2 I think the correct methodology would be:

 	bool open(string fn, string mode="rb") {

Since you don't make changes to fn or mode they should be invariant.

Also, D1 is not dieing, it is not supposed to get any new features. D2 is continually changing which would not be good if you are doing application development.

MikeRJ Wrote:

> 	bool open(char[] fn, char[] mode="rb")
> 	{
> 		filename=fn.dup;
> 		file = fopen(toStringz(filename), toStringz(mode));
> 		if (!file) return false;
> 		return true;
> 	}

D1 and D2 compatible code:

        bool open(in char[] fn, in char[] mode="rb")
        {
                file = fopen(toStringz(fn), toStringz(mode));
                if (!file) return false;
                return true;
        }

"MikeRJ" wrote
> For some reason i think DM 1.0 is slowly dieing as i see tons of new features in D 2.0's phobos not implemented in D 1.0  so im trying to migrate to D2.0
>
> my 1st problem is when i compile code:
>
> bool open(char[] fn, char[] mode="rb")
> {
> filename=fn.dup;
> file = fopen(toStringz(filename), toStringz(mode));
> if (!file) return false;
> return true;
> }
>
> i receive error:
>
>>> cannot implicitly convert expression ("rb") of type invariant(char[2u]) to char[]|
> can anyone help here. thanks in advance.

The correct const-contract usage is:

bool open(const(char)[] fn, const(char)[] mode = "rb")

That is, you are saying open does not modify fn or mode.  It simply uses them as input parameters.

The D1/D2 compatible version that Kagamin posted is also legal (and pretty much the same thing).

-Steve