function isAllowedCast( from, to, casting ) {
	// Anything goes for "unsafe" casting...
	if ( casting === 'unsafe' ) {
		return true;
	}
	// "Casting" to the same data type is always allowed, regardless of the casting mode...
	if ( from === to ) {
		return true;
	}
	// No casts between different data types are allowed in "none" or "equiv" casting modes...
	if ( casting === 'none' || casting === 'equiv' ) {
		return false;
	}
	// In "safe" casting mode, only casts which preserve values are allowed...
	if ( casting === 'safe' ) {
		return isSafeCast( from, to );
	}
	// In "mostly-safe" casting mode, in addition to "safe" casts, for floating-point data types, downcasts are allowed...
	if ( casting === 'mostly-safe' ) {
		return isMostlySafeCast( from, to );
	}
	// In "same-kind" casting mode, in addition to "safe" casts, casts within a "kind" (e.g., between signed integers or between floating-point numbers) are allowed...
	return isSameKindCast( from, to );
}
Returns a boolean indicating if a provided ndarray data type can be cast to another ndarray data type according to a specified casting mode.

@param {string} from - ndarray data type
@param {string} to - ndarray data type
@param {string} casting - ndarray casting mode
@returns {boolean} boolean indicating if a data type can be cast to another data type

@example
var bool = isAllowedCast( 'float32', 'float64', 'safe' );
// returns true

bool = isAllowedCast( 'float64', 'int32', 'safe' );
// returns false