AMPL_PARAMETERINSTANCE

group AMPL_PARAMETERINSTANCE

Functions for parameter instances:

Functions

AMPL_ERRORINFO *AMPL_ParameterInstanceGetValue(AMPL *ampl, const char *entityname, AMPL_TUPLE *index, AMPL_VARIANT **variant)

Get the value of a single instance of this parameter.

Parameters:

• ampl – Pointer to the AMPL struct.

• entityname – Name of parameter instance as string.

• index – Tuple of indices of the instance.

• variant – Pointer to the value to set the parameter instance to.

Returns:

Pointer to the AMPL_ERRORINFO struct.

AMPL_ERRORINFO *AMPL_ParameterInstanceSetValue(AMPL *ampl, const char *entityname, AMPL_TUPLE *index, AMPL_VARIANT *v)

Set the value of a single instance of this parameter.

Parameters:

• ampl – Pointer to the AMPL struct.

• entityname – Name of parameter instance as string.

• index – Tuple of indices of the instance.

• v – Pointer to the value to set the parameter instance to.

Returns:

Pointer to the AMPL_ERRORINFO struct.

AMPL_ERRORINFO *AMPL_ParameterInstanceSetNumericValue(AMPL *ampl, const char *entityname, AMPL_TUPLE *index, double value)

Set the double value of a single instance of this parameter.

Parameters:

• ampl – Pointer to the AMPL struct.

• entityname – Name of parameter instance as string.

• index – Tuple of indices of the instance.

• value – Double value to set the parameter instance to.

Returns:

Pointer to the AMPL_ERRORINFO struct.

AMPL_ERRORINFO *AMPL_ParameterInstanceSetStringValue(AMPL *ampl, const char *entityname, AMPL_TUPLE *index, const char *value)

Set the string value of a single instance of this parameter.

Parameters:

• ampl – Pointer to the AMPL struct.

• entityname – Name of parameter instance as string.

• index – Tuple of indices of the instance.

• value – Stringvalue to set the parameter instance to.

Throws runtime_error:

if the entity has been deleted in the underlying AMPL

Returns:

Pointer to the AMPL_ERRORINFO struct.