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Type

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-#REDIRECT [[Operators]]+[[category:language]]
 +[[category:operator]]
 + 
 +== Datatype declaration ==
 + 
 +=== Definition ===
 +'''Type''' <name>
 +:<variables>
 +'''End'''
 + 
 +Creates a new [[datatype]]. It's handled as if it were a [[struct]], so the declared variables are members of the struct.
 + 
 +While it's a convention to use a '_' as first character in the name of a datatype, it's not mandatory.
 + 
 +When used as an [[argument]] in a [[function]] or [[process]], the [[parameter]] is not a copy, but the variable itself, as shown in the first example, and any change made to the parameter is also changed in the argument. It's more elegant to use a [[pointer]] though, as it also displayed.
 + 
 +=== Example ===
 + 
 +A file with name and path. Note that the assignment <code>myFile2 = myFile;</code> makes a copy of ''myFile'' and throws it into ''myFile2'', which is normal. But when it's used as an argument in a function, the parameter is not a copy but the _file itself.
 + 
 +<pre>
 +Type _file
 + String path;
 + String name;
 +End
 + 
 +Process Main()
 +Private
 + _file myFile;
 + _file myFile2;
 +Begin
 + 
 + myFile.path = "C:\";
 + myFile.name = "autoexec.bat";
 + say("1: " + myFile.path + myFile.name);
 + 
 + myFile2 = myFile;
 + myFile2.name = "config";
 + say("1: " + myFile.path + myFile.name);
 + say("2: " + myFile2.path + myFile2.name);
 + 
 + setName(myFile,"pagefile");
 + say("1: " + myFile.path + myFile.name);
 + 
 + setName2(&myFile2,"pagefile");
 + say("2: " + myFile2.path + myFile2.name);
 + 
 + Repeat
 + frame;
 + Until(key(_ESC))
 + 
 +End
 + 
 +Function setName(_file f, string name)
 +Begin
 + f.name = name;
 +End
 + 
 +Function setName2(_file* f, string name)
 +Begin
 + f.name = name; // this is actually (*f).name = name, but . can be used like this
 +End
 +</pre>
 +Used in example: [[say]](), [[key]](), [[Pointer]]
 + 
 +This will result in something like:<br>
 +{{Image
 + | image = Type3.PNG
 + | caption = Type results
 +}}
 + 
 + 
 +A point with x and y.
 +<pre>
 +// Declare the type _point
 +Type _point
 + float x;
 + float y;
 +End
 + 
 +// Declare the function distance(), because the function returns a datatype
 +// other than int, so it needs to be declared before usage.
 +Declare float distance(_point a,_point b)
 +End
 + 
 +Process Main()
 +Private
 + _point p1,p2;
 +Begin
 + 
 + p1.x = 15.3;
 + p1.y = 34.9;
 + p2.x = 165.4;
 + p2.y = 137.2;
 + 
 + write(0,0,0,0,"Distance: " + distance(p1,p2));
 + drw_line(p1,p2);
 + 
 + Repeat
 + frame;
 + Until(key(_ESC))
 + 
 +End
 + 
 +Function float distance(_point a, _point b)
 +Begin
 + return sqrt( (a.x-b.x)*(a.x-b.x) + (a.y-b.y)*(a.y-b.y) );
 +End
 + 
 +Function int drw_line(_point a, _point b)
 +Begin
 + return draw_line( a.x , a.y , b.x , b.y );
 +End
 +</pre>
 +Used in example: [[write]](), [[key]](), [[sqrt]](), [[draw_line]]()
 + 
 +This will result in something like:<br>
 +{{Image
 + | image = Type.PNG
 + | caption = A line and its distance
 +}}
 + 
 +== ProcessType ==
 + 
 +=== Definition ===
 +'''Type''' <processname>
 + 
 +Acquires the [[processTypeID]] of a [[processType]] or [[function]]. This can be useful for example with the functions [[get_id]]() and [[signal]]().
 + 
 +=== Example ===
 +<pre>
 +Program example;
 +Private
 + proc proc_id; //int could be used too
 +Begin
 + 
 + // Start 2 proc's
 + proc();
 + proc();
 + proc();
 + 
 + // Display all alive proc's
 + y = 0;
 + while( (proc_id=get_id(type proc)) )
 + write(0,0,(y++)*10,0,"proc: " + proc_id);
 + end
 + 
 + // Wait for key ESC
 + Repeat
 + frame;
 + Until(key(_ESC))
 + 
 +End
 + 
 +Process proc()
 +Begin
 + Loop
 + frame;
 + End
 +End
 +</pre>
 +Used in example: [[get_id]](), [[write]](), [[key]]()
 + 
 +This will result in something like:<br>
 +{{Image
 + | image = Type2.PNG
 + | caption = A list of active proc's
 +}}

Current revision


Contents

[edit] Datatype declaration

[edit] Definition

Type <name>

<variables>

End

Creates a new datatype. It's handled as if it were a struct, so the declared variables are members of the struct.

While it's a convention to use a '_' as first character in the name of a datatype, it's not mandatory.

When used as an argument in a function or process, the parameter is not a copy, but the variable itself, as shown in the first example, and any change made to the parameter is also changed in the argument. It's more elegant to use a pointer though, as it also displayed.

[edit] Example

A file with name and path. Note that the assignment myFile2 = myFile; makes a copy of myFile and throws it into myFile2, which is normal. But when it's used as an argument in a function, the parameter is not a copy but the _file itself. 

Type _file
    String path;
    String name;
End

Process Main()
Private
    _file myFile;
    _file myFile2;
Begin

    myFile.path = "C:\";
    myFile.name = "autoexec.bat";
    say("1: " + myFile.path + myFile.name);

    myFile2 = myFile;
    myFile2.name = "config";
    say("1: " + myFile.path + myFile.name);
    say("2: " + myFile2.path + myFile2.name);

    setName(myFile,"pagefile");
    say("1: " + myFile.path + myFile.name);

    setName2(&myFile2,"pagefile");
    say("2: " + myFile2.path + myFile2.name);

    Repeat
        frame;
    Until(key(_ESC))

End

Function setName(_file f, string name)
Begin
    f.name = name;
End

Function setName2(_file* f, string name)
Begin
    f.name = name; // this is actually (*f).name = name, but . can be used like this
End

Used in example: say(), key(), Pointer

This will result in something like:

Image:Type3.PNG
Type results


A point with x and y. 

// Declare the type _point
Type _point
    float x;
    float y;
End

// Declare the function distance(), because the function returns a datatype
// other than int, so it needs to be declared before usage.
Declare float distance(_point a,_point b)
End

Process Main()
Private
    _point p1,p2;
Begin

    p1.x = 15.3;
    p1.y = 34.9;
    p2.x = 165.4;
    p2.y = 137.2;

    write(0,0,0,0,"Distance: " + distance(p1,p2));
    drw_line(p1,p2);

    Repeat
        frame;
    Until(key(_ESC))

End

Function float distance(_point a, _point b)
Begin
    return sqrt( (a.x-b.x)*(a.x-b.x) + (a.y-b.y)*(a.y-b.y) );
End

Function int drw_line(_point a, _point b)
Begin
    return draw_line( a.x , a.y , b.x , b.y );
End

Used in example: write(), key(), sqrt(), draw_line()

This will result in something like:

Image:Type.PNG
A line and its distance

[edit] ProcessType

[edit] Definition

Type <processname>

Acquires the processTypeID of a processType or function. This can be useful for example with the functions get_id() and signal().

[edit] Example 

Program example;
Private
    proc proc_id; //int could be used too
Begin

    // Start 2 proc's
    proc();
    proc();
    proc();

    // Display all alive proc's
    y = 0;
    while( (proc_id=get_id(type proc)) )
        write(0,0,(y++)*10,0,"proc: " + proc_id);
    end

    // Wait for key ESC
    Repeat
        frame;
    Until(key(_ESC))

End

Process proc()
Begin
    Loop
        frame;
    End
End

Used in example: get_id(), write(), key()

This will result in something like:

Image:Type2.PNG
A list of active proc's
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