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Mathematica > MathLink C Language Functions >

MathLink C Function

MLGetNext()

int MLGetNext(MLINK link)
goes to the next object on link and returns its type.

MORE INFORMATION

The following token values can be returned:

MLTKERR	error
MLTKINT	integer
MLTKFUNC	composite function
MLTKREAL	approximate real number
MLTKSTR	character string
MLTKSYM	symbol
MLTKOLDINT	integer from older versions of the MathLink library
MLTKOLDREAL	approximate real number from older versions of the MathLink library
MLTKOLDSTR	character string from older versions of the MathLink library
MLTKOLDSYM	symbol from older versions of the MathLink library

MLTKINT and MLTKREAL do not necessarily signify numbers that can be stored in C int and double variables.

MLGetNext() is declared in the MathLink header file mathlink.h.

EXAMPLES

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Basic Examples (1)

#include "mathlink.h"

/* read the next type from the link */

void f(MLINK lp)
{
    int data;

    switch(MLGetNext())
    {
        case MLTKINT:
            if(! MLGetInteger32(lp, &data))
                { /* unable to read the integer from lp */ }
        /* ... */
    }
}