Re: [Vala] Assisted printf format

["Juan Luis Paz" <juanluispaz gmail com>]

Hello,

I finished the first element about the assisted printf format, I attached the changes (I don't have a svn account)

Now is possible do it:

void main () {
    string a = "foo";
    double b = 123.45;
    long c = 678;
    uint d = 9;

    stdout.printf ("Hello World: %-10?%? %?%?\n", a, b, c, d);
}

Vala translate the '?' for the real format, indicate in the CCode attribute, in the field printf_format, if printf_format is not defined in the type is not possible use the assited printf format,if you try, valac generates a compiler error

Also, I changed the default to_string format to the char type,

before:
public string to_string (string format = "%hhi");

now:
public string to_string (string format = "%c");

I don't know if this change is correctly, but why the default char format is numerical ?

Missing format string:
I don't know the format string for unichar

If this is a good feature make this changes in the source repository

2008/8/11 Juan Luis Paz <juanluispaz gmail com>

Hello,

Actually, when I want use a prinf I need remember the data type format string; but vala can do it automatically

I propose create another data type in the format string: ?, like i, g u, li, etc. Example: %?, %-10?

When use '?' vala can translate this for the real format string, indicate in CCode attribute

Example:
void main () {
    string a = "foo";
    double b = 123.45;
    long c = 678;
    uint d = 9;
    stdout.printf ("Hello World: %-10?%g %?%?\n", a, b, c, d);
}

Vala translate the printf string to "Hello World: %-10s%g %li%u\n"

The '?' indicate to vala that must use assisted prinf format

The assisted prinf format can:
- use a format string indicate in CCode attribute (ideal for int, uint, string, etc.)
- get a field value indicate in CCode attribute (ideal for StringBuilder, for get str field value)
- call a to string method o another indicate in CCode attribute (ideal for general propose and for bool)

I'm working for do it.

I want to know what their opinions about that

--
Juan Luis Paz

--
Juan Luis Paz

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