GLOBAL

Purpose:

Declares a global variable in a function.

Syntax:

GLOBAL var1, var2, ..., varN

varN

One or more variable names.

Example:

// myfun.spl
myfun(x)
{
    local a;
    global b;

    a = x;
    b = a * a;
}

a = 10;

b = 20;

myfun(2);

a == 10;

b == 4;

The SPL function myfun declares variable a as local and variable b as external or global. Thus, the global variable a is unaffected, but global variable b is assigned by myfun.

Example:

Global variables can be specified on a file basis.

// myfun1.spl

global a = 10;
global b = 20;

myfun1()
{
    return(b);
}

myfun2(x)
{
    a = x;
    b = a * a;
}

c1 = myfun1();

c1 == 20;

myfun2(5);

a == 5;

b == 25;

c2 = myfun1();

c2 == 25;

Variables a and b are global variables accessible to both functions myfun1 and myfun2.

Remarks:

If a variable is not declared in an SPL function, it is assumed to be local.

File based external variables are initialized when the SPL function is first loaded, whether automatically loaded or explicitly loaded.

The GLOBAL keyword is the same as the EXTERN keyword.

See LOCAL to specify local variables in an SPL function.

See STATIC to define local variables that are persistent across SPL function calls.

GLOBAL

Purpose:

Syntax:

Example:

Example:

Remarks:

See Also: