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3.3.2 Number Declarations

(1)

A number_declaration declares a named number.

Syntax

(2)
       number_declaration ::=
            defining_identifier_list : constant := static_expression;

Name Resolution Rules

(3)

The static_expression given for a number_declaration is expected to be of any numeric type.

Legality Rules

(4)

The static_expression given for a number declaration shall be a static expression, as defined by clause 4.9.

Static Semantics

(5)

The named number denotes a value of type universal_integer if the type of the static_expression is an integer type. The named number denotes a value of type universal_real if the type of the static_expression is a real type.

(6)

The value denoted by the named number is the value of the static_expression, converted to the corresponding universal type.

Dynamic Semantics

(7)

The elaboration of a number_declaration has no effect.

Examples

(8)

Examples of number declarations:

(9)
       Two_Pi        : constant := 2.0*Ada.Numerics.Pi;   -- a real number (see A.5)
(10)
       Max           : constant := 500;                   -- an integer number
       Max_Line_Size : constant := Max/6                  -- the integer 83
       Power_16      : constant := 2**16;                 -- the integer 65_536
       One, Un, Eins : constant := 1;                     -- three different namesfor 1

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