| Macros | |
| #define | QL_MIN_INTEGER ((std::numeric_limits<QL_INTEGER>::min)()) | 
| #define | QL_MAX_INTEGER ((std::numeric_limits<QL_INTEGER>::max)()) | 
| #define | QL_MIN_REAL -((std::numeric_limits<QL_REAL>::max)()) | 
| #define | QL_MIN_POSITIVE_REAL ((std::numeric_limits<QL_REAL>::min)()) | 
| #define | QL_MAX_REAL ((std::numeric_limits<QL_REAL>::max)()) | 
| #define | QL_EPSILON ((std::numeric_limits<QL_REAL>::epsilon)()) | 
| #define | QL_NULL_INTEGER ((std::numeric_limits<int>::max)()) | 
| #define | QL_NULL_REAL ((std::numeric_limits<float>::max)()) | 
Some compilers do not give an implementation of <limits> yet. For the code to be portable these macros should be used instead of the corresponding method of std::numeric_limits or the corresponding macro defined in <limits.h>. 
| #define QL_MIN_INTEGER ((std::numeric_limits<QL_INTEGER>::min)()) | 
Defines the value of the largest representable negative integer value
| #define QL_MAX_INTEGER ((std::numeric_limits<QL_INTEGER>::max)()) | 
Defines the value of the largest representable integer value
| #define QL_MIN_REAL -((std::numeric_limits<QL_REAL>::max)()) | 
Defines the value of the largest representable negative floating-point value
| #define QL_MIN_POSITIVE_REAL ((std::numeric_limits<QL_REAL>::min)()) | 
Defines the value of the smallest representable positive double value
| #define QL_MAX_REAL ((std::numeric_limits<QL_REAL>::max)()) | 
Defines the value of the largest representable floating-point value
| #define QL_EPSILON ((std::numeric_limits<QL_REAL>::epsilon)()) | 
Defines the machine precision for operations over doubles