## Values

This section describes the kinds of values that are manipulated by
Caml Light programs.

### Base values

#### Integer numbers

Integer values are integer numbers from -2^{30} to 2^{30}-1, that
is -1073741824 to 1073741823. The implementation may support a
wider range of integer values: on 64-bit platforms, the current
implementation supports integers ranging from -2^{62} to 2^{62}-1.

#### Floating-point numbers

Floating-point values are numbers in floating-point representation.
The current implementation uses double-precision floating-point
numbers conforming to the IEEE 754 standard, with 53 bits of mantissa
and an exponent ranging from -1022 to 1023.

#### Characters

Character values are represented as 8-bit integers between 0 and 255.
Character codes between 0 and 127 are interpreted following the ASCII
standard. The current implementation interprets character codes
between 128 and 255 following the ISO 8859-1 standard.

#### Character strings

String values are finite sequences of characters. The current
implementation supports strings containing up to 2^{24} - 6
characters (16777210 characters).

### Tuples

Tuples of values are written (v_1, ..., v_n), standing for the
n-tuple of values v_1 to v_n. The current implementation
supports tuple of up to 2^{22} - 1 elements (4194303 elements).

### Records

Record values are labeled tuples of values. The record value written
{ label_1 = v_1; ...; label_n = v_n } associates the value
v_i to the record label label_i, for i = 1 ... n. The current
implementation supports records with up to 2^{22} - 1 fields
(4194303 fields).

### Arrays

Arrays are finite, variable-sized sequences of values of the same
type. The current implementation supports arrays containing to
2^{22} - 1 elements (4194303 elements).

### Variant values

Variant values are either a constant constructor, or a pair of a
non-constant constructor and a value. The former case is written
cconstr; the latter case is written ncconstr(v), where v is said
to be the argument of the non-constant constructor ncconstr.

The following constants are treated like built-in constant
constructors:

Constant | Constructor |

`false` | the boolean false |

`true` | the boolean true |

`()` | the ``unit'' value |

`[]` | the empty list |

The current implementation limits the number of distinct constructors
in a given variant type to at most 249.

### Functions

Functional values are mappings from values to values.

### Objects

Objects are composed of a hidden internal state which is a
record of instance variables, and a set of methods for accessing and
modifying these variables. The structure of an object is described by
the toplevel class that created it.