• Qian Xu (37/37) Mar 20 2009 Hi All,
• Daniel Keep (4/17) Mar 20 2009 to!(char[]) should call toString. to!(T) should support all atomic
• grauzone (2/22) Mar 20 2009
• Daniel Keep (8/34) Mar 20 2009 Probably something like
• Qian Xu (5/9) Mar 20 2009 There is one problem: I have to check, whether a pointer is NULL.
• Qian Xu (12/12) Mar 20 2009 The problem has been solved.

Qian Xu <quian.xu stud.tu-ilmenau.de> writes:

Hi All,

I want to write an universel toString() method for debugging propose.
However I cannot write in one version. The compiler says error all the time.
Could someone tell me, how to write an universel one?

What I want, is to convert primtive types (int, int*, bool, bool*, etc.) to
string using "tango.text.Convert.to()" and convert object to string by
calling obj.toString.


----------------------- my current version -------------------------
public char[] toS(int* val)
{
    if (val is null)
        return "NULL";
    return to!(char[])(*val);
}

public char[] toS(Object val)
{
    if (val is null)
        return "NULL";
    return val.toString;
}

public char[] toS(char[] val)
{
    if (val is null)
        return "NULL";
    return val;
}

public char[] toS(int val)
{
    return to!(char[])(val);
}

public char[] toS(bool val)
{
    return to!(char[])(val);
}
----------------------- my current version -------------------------



Best regards
--Qian Xu

Daniel Keep <daniel.keep.lists gmail.com> writes:

Qian Xu wrote:
 Hi All,
 
 I want to write an universel toString() method for debugging propose.
 However I cannot write in one version. The compiler says error all the time.
 Could someone tell me, how to write an universel one?
 
 What I want, is to convert primtive types (int, int*, bool, bool*, etc.) to
 string using "tango.text.Convert.to()" and convert object to string by
 calling obj.toString.

 ...
 
 Best regards
 --Qian Xu

to!(char[]) should call toString.  to!(T) should support all atomic
types, strings, structs and classes.

  -- Daniel

grauzone <none example.net> writes:

Daniel Keep wrote:
 
 Qian Xu wrote:
 Hi All,

 I want to write an universel toString() method for debugging propose.
 However I cannot write in one version. The compiler says error all the time.
 Could someone tell me, how to write an universel one?

 What I want, is to convert primtive types (int, int*, bool, bool*, etc.) to
 string using "tango.text.Convert.to()" and convert object to string by
 calling obj.toString.

 ...

 Best regards
 --Qian Xu

 
 to!(char[]) should call toString.  to!(T) should support all atomic
 types, strings, structs and classes.

So to!(char[])(x) almost like format("%s", x)?

   -- Daniel

Daniel Keep <daniel.keep.lists gmail.com> writes:

grauzone wrote:
 Daniel Keep wrote:
 Qian Xu wrote:
 Hi All,

 I want to write an universel toString() method for debugging propose.
 However I cannot write in one version. The compiler says error all
 the time.
 Could someone tell me, how to write an universel one?

 What I want, is to convert primtive types (int, int*, bool, bool*,
 etc.) to
 string using "tango.text.Convert.to()" and convert object to string by
 calling obj.toString.

 ...

 Best regards
 --Qian Xu

 to!(char[]) should call toString.  to!(T) should support all atomic
 types, strings, structs and classes.

 
 So to!(char[])(x) almost like format("%s", x)?
 
   -- Daniel


Probably something like
tango.text.convert.Format.Format.convert("{0}",x) for Tango.

Actually, that's not entirely true.  to!(char[]) won't convert pointers
or arrays.

Sorry; the brain switched off as soon as I saw "I have to special-case
to" :P

  -- Daniel

Qian Xu <quian.xu stud.tu-ilmenau.de> writes:

Daniel Keep wrote:
 
 to!(char[]) should call toString.  to!(T) should support all atomic
 types, strings, structs and classes.
 

There is one problem: I have to check, whether a pointer is NULL. 
If it is NULL, I should return "NULL", otherwise I should call to!(char[]
(*my_pointer_var)

I want to save this check.

Qian Xu <quian.xu stud.tu-ilmenau.de> writes:

The problem has been solved.

There is a wonderfull function in Tango.

--------------------------------------------
import tango.text.convert.Format;

class Foo {
  // attributes go here...
  public char[] toString() {
    return Format.convert(".... {} .. {} ..", attr1, attr2, attr3);
  }
}
--------------------------------------------

This works perfect with all data types.