Why won't the following code compile? Here's the error:

filewatcher.d(21): Error: cannot implicitly convert expression (new File(file, "r")) of type File* to shared(_iobuf)*

/**
 * Imports.
 */
import std.stdio;

/**
 * A class to watch for changes in a file.
 */
class Example
{
	/**
	 * Member variables.
	 */
	private FILE* _file;

	/**
	 * Constructor.
	 */
	public this(string file)
	{
		this._file = new File(file, "r");
	}
}

Am 23.05.2013 18:27, schrieb Gary Willoughby:
> Why won't the following code compile? Here's the error:
> 
> filewatcher.d(21): Error: cannot implicitly convert expression (new
> File(file, "r")) of type File* to shared(_iobuf)*
> 
> /**
>  * Imports.
>  */
> import std.stdio;
> 
> /**
>  * A class to watch for changes in a file.
>  */
> class Example
> {
>     /**
>      * Member variables.
>      */
>     private FILE* _file;
> 
>     /**
>      * Constructor.
>      */
>     public this(string file)
>     {
>         this._file = new File(file, "r");
>     }
> }

Because that's not the same: File != FILE
you probably want the .handle

On Thursday, 23 May 2013 at 16:27:19 UTC, Gary Willoughby wrote:
> Why won't the following code compile? Here's the error:
>
> filewatcher.d(21): Error: cannot implicitly convert expression (new File(file, "r")) of type File* to shared(_iobuf)*
>
> /**
>  * Imports.
>  */
> import std.stdio;
>
> /**
>  * A class to watch for changes in a file.
>  */
> class Example
> {
> 	/**
> 	 * Member variables.
> 	 */
> 	private FILE* _file;
>
> 	/**
> 	 * Constructor.
> 	 */
> 	public this(string file)
> 	{
> 		this._file = new File(file, "r");
> 	}
> }

/**
 * Imports.
 */
import std.stdio;

/**
 * A class to watch for changes in a file.
 */
class Example
{
	/**
	 * Member variables.
	 */
	private File _file;

	/**
	 * Constructor.
	 */
	public this(string file)
	{
		_file = File(file, "r");
	}
}

File is a wrapper around a FILE*, it's not the same as a FILE*

No need for new, File is a struct, new is (normally) for classes. No need for "this.", although there's no harm in it.

> File is a wrapper around a FILE*, it's not the same as a FILE*
>
> No need for new, File is a struct, new is (normally) for classes. No need for "this.", although there's no harm in it.

Ah yes, thanks.

Hmmm... Following your example i'm still having problems compiling this simple snippet:

import std.stdio;

class Example
{
	private FILE _file;

	public this(string file)
	{
		this._file = File(file, "r");
	}
}

Error:

test.d(9): Error: cannot implicitly convert expression ((File __ctmp1220 = 0;
 , __ctmp1220).this(file, "r")) of type File to shared(_iobuf)

Am 23.05.2013 21:45, schrieb Gary Willoughby:
> Hmmm... Following your example i'm still having problems
> compiling this simple snippet:
>
> import std.stdio;
>
> class Example
> {
> 	private FILE _file;
>
> 	public this(string file)
> 	{
> 		this._file = File(file, "r");
> 	}
> }
>
> Error:
>
> test.d(9): Error: cannot implicitly convert expression ((File
> __ctmp1220 = 0;
>    , __ctmp1220).this(file, "r")) of type File to shared(_iobuf)
>

you former

private FILE* _file wasn't an File

and your current

private FILE _file is still not File

because FILE and File is something differnt (case sensitive)

why not write

private File _file

> you former
>
> private FILE* _file wasn't an File
>
> and your current
>
> private FILE _file is still not File
>
> because FILE and File is something differnt (case sensitive)
>
> why not write
>
> private File _file

Gah! of course. Thanks. I think i better get some sleep...