lib/parser.js
function op1(value, priority) {
	if (value === MINUS) {
		priority += 2;
	}
	return new Token(OP1, value, priority);
}
function op1(value, priority) {
	if (value === MINUS) {
		priority += 2;
	}
	return new Token(OP1, value, priority);
}
function op1 ( value , priority ) { if ( value === MINUS ) { priority += 2 ; } return new Token ( OP1 , value , priority ) ; }
Unary operator factory
@param  {Number} value    Operator  character code
@param  {Number} priority Operator execution priority
@return {Token[]}
Unary operator factory